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Index R : RT9644/RT9644A,RT9643,RT9221,
RT9644/RT9644A
Vendor:Other Category:Other
The RT9644/A is a complete ACPI compliant power solution for DDR and DDR2 memory system with up to 4 DIMMs dual channel systems. This RT9644 includes one synchronous buck controller for DDR/DDR2 VDDQ, one DDR/DDR2 bus te...RT9643
Mfg:RichTek Pack:MLP D/C:04+ Vendor:Other Category:Other
The RT9643 is a combo regulator which is compliant to ACPI specification for desktop/motherboard power management and system application. The RT9643 part features one switch regulator for DDR memory VDDQ power; three lin...RT9641C
Vendor:Other Category:Other
The RT9641C, paired with either the RT9230 or RT9231 simplifies the implementation of ACPI-compliant designs in microprocessor and computer applications. The IC integrates two linear controllers and a low-current pass tr...RT9641A/RT9641B
Vendor:Other Category:Other
The RT9641A/B, paired with either the RT9230 or RT9231 simplifies the implementation of ACPI-compliant designs in microprocessor and computer applications. The IC integrates two linear controllers and a low-current pass ...RT9619/RT9619A
Vendor:Other Category:Other
The RT9619/A is a high frequency, dual MOSFET driver specifically designed to drive two power N-Channel MOSFETs in a synchronous-rectified buck converter topology. This driver is combined with Richtek's series of Multi-P...RT9618/RT9618A
Vendor:Other Category:Other
The RT9618/A is a high frequency, dual MOSFET driver specifically designed to drive two power N-Channel MOSFETs in a synchronous-rectified buck converter topology. This driver combined with Richtek' s series of Multi-Pha...RT9607/RT9607A
Vendor:Other Category:Other
The RT9607/A is a dual power channel MOSFET driver specifically designed to drive four power N-MOSFETs in a synchronous-rectified buck converter topology. These drivers combined with RichTek’ s series of Multi-Phas...RT9605B
Vendor:Other Category:Other
adaptive shoot-through protection to prevent upper and lower MOSFETs from conducting simultaneously and shorting the input supply. The RT9605B also detects the fault condition during initial start-up prior to the multi-p...RT9603
Mfg:REALTEK Pack:03+ D/C:SOP-8 Vendor:Other Category:Other
The RT9603 is a high frequency, dual MOSFET drivers specifically designed to drive two power N-MOSFETs in a synchronous-rectified buck converter topology. The device combined with the RT924x series of multi-phase PWM con...RT9602
Vendor:Other Category:Other
The RT9602 is a dual power channel MOSFET driver specifically designed to drive four power N-Channel MOSFETs in a synchronous-rectified buck converter topology. These drivers combined with RT9237/A and RT9241A/B series o...RT9600
Pack:SOP8 D/C:06+/07+ Vendor:Other Category:Other
The RT9600 is a high frequency, dual MOSFET driver specifically designed to drive two power NChannel MOSFETs in a synchronous-rectified buck converter topology. This driver combined with a RT9237 Multi-Phase Buck PWM con...RT9595
Vendor:Other Category:Other
The RT9595 is a complete photoflash module solution for digital and film cameras. It is targeted for applications that use 2 to 3 AA batteries or 1 Lithium-Ion battery. The RT9595 adopts fly back topology which use const...RT9594A/RT9594B
Vendor:Other Category:Other
The RT9594A/B are complete photoflash module solutions for digital and film cameras. They are targeted for applications that use 2 to 4 AA batteries or 1 to 2 lithium-ion batteries. The RT9594A/B adopt flyback topology w...RT9593
Vendor:Other Category:Other
The RT9593 is a complete photoflash module solution in digital and film cameras. It is targeted for applications that use either two AA batteries or single lithium-ion battery.The RT9593 uses flyback topology to charge p...RT9592
Vendor:Other Category:Other
The RT9592 is a highly integrated photoflash charging solution with auto refresh function in digital and film cameras. It is targeted for applications that use either two AA batteries or a single lithium-ion battery.The ...RT9591
Vendor:Other Category:Other
The RT9591 is a highly integrated photoflash charging solution in digital and film cameras. It is targeted for applications that use either two AA batteries or a single lithium-ion battery.The RT9591 integrates a constan...RT9590
Vendor:Other Category:Other
The RT9590 is a highly integrated photoflash charging solution in digital and film cameras. It is targeted for applications that use either two AA batteries or a single lithium-ion battery.The RT9590 integrates a constan...RT9568
Vendor:Other Category:Other
The RT9568 is a DC to DC controller IC for step-down , step-up, inverting, and flyback converters. The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with a...RT9513
Vendor:Other Category:Other
The RT9513 is a fully integrated low cost single-cell Li-Ion battery charger IC ideal for portable applications. The RT9513 is capable of being powered up from AC adapter. The RT9513 enters sleep mode when AC adapter is ...RT9505A
Vendor:Other Category:Other
The RT9505A is a fully integrated low cost single-cell Li-Ion battery charger IC ideal for portable applications. The RT9505A is capable of being powered up from AC adapter. The RT9505A enters sleep mode when AC adapter ...RT9503
Vendor:Other Category:Other
The RT9503 is a fully integrated low cost single-cell Li-Ion battery charger IC ideal for portable applications. The RT9503 is capable of being powered up from AC adapter and the USB (Universal Serial Bus) port inputs. T...RT9501A/RT9501B
Vendor:Other Category:Other
The RT9501 is a single Lithium-Ion or Lithium-Polymer cell linear battery charger which is designed for compact and cost-sensitive handheld devices. It combines charge status indication, charge termination, battery tempe...RT9401A/RT9401B
Vendor:Other Category:Other
The RT9401A/B are digital to analog converters which generate a reference voltage for Intel VR10.x/AMD K8 5-bit VID code respectively. The parts are proposed to pair with a series of RichTek's general purpose PWM control...RT9380
Vendor:Other Category:Other
The RT9380 is an integrated solution for backlighting and phone camera input supply. The part contains a charge pump white LED driver and dual low dropout linear regulators.In the section of charge pump, the RT9380 can p...RT9379
Vendor:Other Category:Other
The RT9379 is a 6 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9379 can power up to 6 white LEDs with regulated constant current for uniform inte...RT9378B
Vendor:Other Category:Other
The RT9378B is a 4 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9378B can power up to 4 white LEDs with regulated constant current for uniform in...RT9378A
Vendor:Other Category:Other
The RT9378A is a 4 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9378A can power up to 4 white LEDs with regulated constant current for un...RT9378
Vendor:Other Category:Other
The RT9378 is a 4 channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9378 can power up to 4 white LEDs with regulated constant current for uniform inte...RT9376
Vendor:Other Category:Other
The RT9376 is a high performance white LED driver. It integrates a current sources and automatic mode selection charge pump. The part maintains the high efficiency by utilizing an x1/x1.5 fractional charge pump and low d...RT9370
Vendor:Other Category:Other
RT9370 is an integrated solution for backlighting and OLED input supply. The part contains a charge pump white LED driver and a boost OLED driver with an embedded diode.In the section of charge pump, RT9370 supports up t...RT9368A
Vendor:Other Category:Other
The RT9368A is a high efficiency and cost effective charge pump white LED driver. It supports up to 4 white LEDs with regulated constant current for uniform intensity. The RT9368A maintains the highest efficiency by uti...RT9368
Vendor:Other Category:Other
The RT9368 is a high efficiency and cost effective charge pump white LED driver. It supports up to 4 white LEDs with regulated constant current for uniform intensity. The RT9368 maintains the highest efficiency by utiliz...RT9367C
Vendor:Other Category:Other
The RT9367C is an integrated solution for backlighting and phone camera input supply. The part contains a charge pump white LED driver and dual low dropout linear regulators. This IC can be shutdown by pulling ENA low.In...RT9367A
Vendor:Other Category:Other
The RT9367A is an integrated solution for backlighting and phone camera input supply. The part contains a charge pump white LED driver and dual low dropout linear regulators.In the section of charge pump, The RT9367A can...RT9366
Vendor:Other Category:Other
The RT9366 is a high efficiency and high output current charge pump white LED driver. It supports up to 4 backlight LEDs and 3 flash LEDs with regulated constant currents for uniform intensity. The RT9366 maintains the h...RT9365
Mfg:RICHTEK Pack: D/C: Vendor:Other Category:Other
The RT9365 is a high performance white LED driver. It integrates current sources and automatic mode selection charge pump. The part maintains the high efficiency by utilizing an x1/x1.5 fractional charge pump and low dro...RT9364
D/C:7 Vendor:Other Category:Other
The RT9364 is a high performance white LED driver. It integrates current sources and automatic mode selection charge pump. The part maintains the high efficiency by utilizing an x1/x1.5 fractional charge pump and low dro...RT9363A
Vendor:Other Category:Other
The RT9363A is a compact, high efficient and highly integrated charge pump white LED driver. It maintains the highest efficiency by utilizing a x1/x2 fractional charge pump and low dropout current regulators. The RT9363A...RT9363
Mfg:RICHTEK D/C:2007 Vendor:Other Category:Other
The RT9363 is a high efficiency and cost effective charge pump white LED driver. It supports up to 3 white LEDs with regulated constant current for uniform intensity. The RT9363 maintains the highest efficiency by utiliz...RT9362/A
Vendor:Other Category:Other
The RT9362/A is a high efficiency charge pump white LED driver. It supports up to 4 white LEDs with regulated constant current for uniform intensity. The RT9362/A maintains the highest efficiency by utilizing a x1/x1.5/x...RT9302
Vendor:Other Category:Other
The RT9302 is a high performance constant current driver for white LED. It supports up to 3 white LEDs and regulates a constant current for uniform intensity. Each channel supports up to 20mA output current with 1% typic...RT9301
Mfg:SOP-8 Vendor:Other Category:Other
The RT9301 is a 3-Channel current source driver for RGB LED. It is easy to be designed in applications that need mixing RGB light source for multi-color output.The RT9301 also provide users with great flexibility and dev...RT9300A/RT9300B
Vendor:Other Category:Other
The RT9300A/B low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The RT9300A/B uses an internal resistor to set the bias curre...RT9293
Mfg:Richtek Pack:09+ Vendor:Other Category:Other
• Internal Power N-MOSFET Switch• Wide Range for PWM Dimming (100Hz to200kHz)• Minimize the External Component Counts• Internal Soft Start• Internal Compensation• Under Voltage Prote...RT9292
Vendor:Other Category:Other
The RT9292 is a high frequency and high efficiency asynchronous boost converter for WLED driving application. It integrates a 28V MOSFET to support up to 6 White LEDs for panel backlighting and OLED power applications. B...RT9288A
Vendor:Other Category:Other
The RT9288A is a wide input operating voltage range step-up controller. High voltage output and large output current are feasible by using an external N-MOSFET. The RT9288A input operating range is from 3V to 13.5V. Besi...RT9287A
Vendor:Other Category:Other
The RT9287A is an integrated solution for WLED and camera power. It contains a boost converter with internal schottky diode to provide WLED power and Dual LDO for the power of camera image sensor.In the section of boost ...RT9287
Vendor:Other Category:Other
The RT9287 integrates a boost converter for OLED power and a Dual LDO for camera image sensor power. To achieve high efficiency, the boost converter optimizes its operating frequency for small LC filters value and reduce...RT9285C
Vendor:Other Category:Other
The RT9285C is a high frequency asynchronous boost converter with internal diode, which can support 2 to 5 White LEDs for backlighting and OLED power supply. The Internal soft start function can reduce the inrush current...RT9285A/RT9285B
Vendor:Other Category:Other
The RT9285 is a high frequency asynchronous boost converter with internal diode, which can support 2 to 5 White LEDs for backlighting and OLED power supply. The Internal soft start function can reduce the inrush current....RT9284B
Vendor:Other Category:Other
The RT9284A/B is a compact, high efficient and high integration LED driver. Internal 22V MOSFET can support 2 to 5 White LEDs for backlighting and camera flashing. Highly integration and internal compensation network min...RT9284A/RT9284B
Vendor:Other Category:Other
The RT9284A/B is a compact, high efficient and high integration LED driver. Internal 22 V MOSFET can support 2 to 5 White LEDs for backlighting and camera flashing.Highly integration and internal compensation network min...RT9284A/B
Vendor:Other Category:Other
The RT9284A/B is a compact, high efficient and high integration LED driver. Internal 22V MOSFET can support 2 to 5 White LEDs for backlighting and camera flashing.Highly integration and internal compensation network mini...RT9284A
Vendor:Other Category:Other
The RT9284A/B is a compact, high efficient and high integration LED driver. Internal 22V MOSFET can support 2 to 5 White LEDs for backlighting and camera flashing. Highly integration and internal compensation network min...RT9278
Vendor:Other Category:Other
The RT9278 is a compact, high efficiency, synchronous step-up converter, it provides a power supply solution for products powered by either two-cell, three-cell Alkaline/ NiMH or one-cell Li-Ion/Li-polymer battery.The RT...RT9277B
Vendor:Other Category:Other
The RT9277A/B is a high performance, low noise, fixed frequency step up DC-DC Converter. The RT9277A/B converters input voltage ranging 2.5V to 5.5V into output voltage up to 16V. Current mode control with external compe...RT9277A
Vendor:Other Category:Other
The RT9277A/B is a high performance, low noise, fixed frequency step up DC-DC Converter. The RT9277A/B converters input voltage ranging 2.5V to 5.5V into output voltage up to 16V. Current mode control with external compe...RT9273
Vendor:Other Category:Other
The RT9273 is a high efficiency step-up DC-DC converter specifically designed for dual panel mobile phone applications.According to SP status, RT9273 can either regulates output current flowing through series-connected L...RT9271
Vendor:Other Category:Other
The RT9271 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive one to three LEDs in series from a Li-Ion cell. Series connection of the LEDs provides ident...RT9270
Vendor:Other Category:Other
The RT9270 is a high performance, low noise, fixed frequency step up DC-DC Converter. The RT9270 converters input voltage ranging 2.3V to 5.5V into output voltage up to 14V. Current mode control with external compensatio...RT9267
Vendor:Other Category:Other
The RT9267 is a triple output DC-DC converter IC including two adaptive PWM controllers, one low dropout regulator, and one voltage detector. RT9267 is capable of delivering hundreds of mA output current and consumes onl...RT9266B
Vendor:Other Category:Other
The RT9266B is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver i...RT9266
Vendor:Other Category:Other
The RT9266 is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver in...RT9264
Vendor:Other Category:Other
The RT9264 is a compact, high efficient, step-up DC/DC converter with current mode PWM control loop, providing stable and high efficient operations without external compensation.The RT9264 suitable for 1 to 4 battery cel...RT9263
Pack:SOT-89 D/C:04+ Vendor:Other Category:Other
The RT9263 is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both con...RT9262A
Mfg:RichTek Pack:SOP-8 D/C:2005 Vendor:Other Category:Other
The RT9262/A is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both c...RT9262/RT9262A
Vendor:Other Category:Other
The RT9262/A is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both c...RT9262
Mfg:richtech Vendor:Other Category:Other
The RT9262/A is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both c...RT9261B
Vendor:Other Category:Other
The RT9261B Series are VFM Step-up DC/DC converter ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments.The RT9261B IC consists of an oscillator, a VFM control circuit,...RT9261A
Mfg:RiChTek Pack:SOT25 D/C:O4 Vendor:Other Category:Other
The RT9261 Series are VFM Step-up DC/DC ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments.The RT9261 IC consists of an oscillator, a VFM control circuit, a driver tra...RT9261/RT9261A
Vendor:Other Category:Other
The RT9261 Series are VFM Step-up DC/DC ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments.The RT9261 IC consists of an oscillator, a VFM control circuit, a driver tra...RT9261
Mfg:RiChTek Pack:SOT25 D/C:O4 Vendor:Other Category:Other
The RT9261 Series are VFM Step-up DC/DC ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments.The RT9261 IC consists of an oscillator, a VFM control circuit, a driver tra...RT9259
Vendor:Other Category:Other
The RT9259 is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The synchr...RT9256
Mfg:SOP Vendor:Other Category:Other
The RT9256 is an analogous current mode design and is specifically promoted for high power density consideration platform with MLCC capacitor attached, such as high-end add-on graphic card core power and DDR SDRAM core p...RT9248A
Vendor:Other Category:Other
The RT9248A is a cost-effective multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM. The RT9248A controls 2 or 3 buck switching stages operating in interleaved phase set automatically....RT9248
Mfg:NULL Pack:TSSOP D/C:N/A Vendor:Other Category:Other
The RT9248 is a multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM.The RT9248 controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The multi-phase a...RT9246A
Vendor:Other Category:Other
The RT9246A is a multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM. The RT9246A controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The multi-phas...RT9246
Vendor:Other Category:Other
The RT9246 is a multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM. The RT9246 controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The multi-phase ...RT9245B
Vendor:Other Category:Other
RT9245B is a multi-phase buck DC/DC controller integrated with all control functions for AMD K8 CPU. The RT9245B could be operated with 2, 3 or 4 buck switching stages operating in interleaved phase set automatically. Th...RT9245A
Mfg:SSOP Pack:80 D/C:RICHTEK Vendor:Other Category:Other
RT9245A is a multi-phase buck DC/DC controller integrated with all control functions for AMD K8 CPU or Intel® GHz CPU which is VRD10.x-compliant. The RT9245A could be operated with 2, 3 or 4 buck switching stages ope...RT9245
Vendor:Other Category:Other
RT9245 is a multi-phase buck DC/DC controller integrated with all control functions for IntelÒ GHz CPU which is VRD10.X-compliant. The RT9245 could be operated with 2, 3 or 4 buck switching stages operating in int...RT9244
Mfg:RICHTEK Vendor:Other Category:Other
The RT9244 is a multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM. The RT9244 controls 2, 3 or 4 buck switching stages operating in interleaved phase set automatically. The multi-pha...RT9241B
Mfg:RICHTEK Vendor:Other Category:Other
The RT9241A/B is a two-phase buck DC/DC controller integrated with all control functions for high performance processor VRM. The RT9241A/B drives 2 buck switching stages operating in 180 degree phase shift. The twophase ...RT9241A/RT9241B
Vendor:Other Category:Other
RT9241A/B regulates both easily set voltage and current loops. Precise current sharing for power stage is achieved by differential input current sense and processing circuit. The settings of current sense, droop tuning a...RT9241A
Mfg:RICHTEK Vendor:Other Category:Other
The RT9241A/B is a two-phase buck DC/DC controller integrated with all control functions for high performance processor VRM. The RT9241A/B drives 2 buck switching stages operating in 180 degree phase shift. The twophase ...RT9238
Mfg:RICHTEK Vendor:Other Category:Other
The RT9238 is a 4-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates a PWM controller,triple linear controller as well as monitoring and protection function...RT9237
Mfg:RICHTEK Vendor:Other Category:Other
The RT9237 is a multi-phase buck DC/DC controllerintegrated with all control functions for highperformance processor VRM. The RT9237 drives 2,3 or 4 buck switching stages operating in interleavedphase set automatically. ...RT9233
Vendor:Other Category:Other
The RT9233 is designed as one kind of 4-bit programmable synchronous PWM buck converter controller that can be used in (1)Pentium II microprocessors power supplies;(2)flexible motherboards power supplies;(3)low-voltage d...RT9232A
Vendor:Other Category:Other
The RT9232A is a single-phase synchronous buck PWM DC-DC converter controller designed to drive two N-Channel MOSFET. It provides a highly accurate, programmable output voltage precisely regulated to low voltage requirem...RT9232
Vendor:Other Category:Other
The RT9232 is designed as one kind of 4-bit programmable synchronous PWM buck converter controller that can be used in (1)Pentium II microprocessors power supplies;(2)flexible motherboards power supplies;(3)low-voltage d...RT9231A
Mfg:RUHTEK Pack:SOP D/C:09+ Vendor:Other Category:Other
The RT9231A is a 4-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates a PWM controller, triple linear controller as well as monitoring and protection functi...RT9231
Vendor:Other Category:Other
The RT9231 is designed as a 4-in-one power controller optimized for high-performance microprocessor and computer applications. This IC integrates a PWM controller, triple linear controller as well as monitoring and prote...RT9230
Mfg:RICHTEK Vendor:Other Category:Other
The RT9230 is a 4-in-one power controller optimizedfor high-performance microprocessor and computerapplications. The IC integrates two PWM controller,two linear controllers as well as monitoring andprotection functions i...RT9227A
Vendor:Other Category:Other
The RT9227A is a 3-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates a synchronous buck PWM controller, a linear regulator and a linear controller as well ...RT9226B
Mfg:RICHTEK Pack:SOP Vendor:Other Category:Other
The RT9226B is a low cost, high-efficiency voltage-mode PWM controller for motherboard power supplyapplication. Synchronous N-channel MOSFET driver,short-circuit protection, and soft start function areintegrated in a sin...RT9224EC
Vendor:Other Category:Other
The RT9224EC is designed as one kind of VRM 8.5 synchronous PWM buck converter controller and output voltage monitor. The regulated output voltage is digitally programmable from 1.05 V to 1.825 V by a 5-bit DAC which pro...RT9224CP
Vendor:Other Category:Other
The RT9224CP is designed as one kind of VRM 8.5 synchronous PWM buck converter controller and output voltage monitor. The regulated output voltage is digitally programmable from 1.05 V to 1.825 V by a 5-bit DAC which pro...RT9224
Vendor:Other Category:Other
The RT9224 is a high sped switching controller designed for used in synchronous DC/DC buck converter for modern CPUs. The regulated output voltage is digitally programmable from 1.3V to 3.5V by a 5-bit DAC which provides...RT9223
Mfg:RICHTEK Vendor:Other Category:Other
The RT9223 is a high efficiency synchronousswitching regulator for modern CPU application. Theoutput is controlled by a 5-bit DAC programmed from1.3V to 2.05V in 0.05V steps and from 2.1V to 3.5Vin 0.1V increments.The sw...RT9221
Mfg:RICHTEK Vendor:Other Category:Other
The RT9221 integrates a PWM controller and twolow-dropout linear regulators into a single chip. ThePWM controller provides the CPU core voltagecontrolled by a 5-bit DAC and the linear sectionregulates power for GTL bus, ...