RT9246A, RT9246APC, RT9248 Selling Leads, Datasheet
MFG:RICHTEK Package Cooled:TSSOP28 D/C:SSOP-28
RT9246A, RT9246APC, RT9248 Datasheet download
Part Number: RT9246A
MFG: RICHTEK
Package Cooled: TSSOP28
D/C: SSOP-28
RT9246A, RT9246APC, RT9248
- Table of contents:
Info of RT9246A
Info of RT9246APC
Info of RT9248
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About RT9246A
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Datasheet: RT9246A
File Size: 282410 KB
Manufacturer: Richtek
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About RT9001
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Datasheet: RT9001
File Size: 172035 KB
Manufacturer: Richtek Technology Corporation
Download : Click here to Download
About RT9248
PDF/DataSheet Download
Datasheet: RT9248
File Size: 151074 KB
Manufacturer: RICHTEK
Download : Click here to Download
RT9246A General Description
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-phase architecture provides high output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The high equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient.
RT9246A controls both voltage and current loops to achieve good regulation, response & power stage thermal balance. Precise current loop using Inductor DCR as sense component builds precise load line for strict VRM DC & transient specification and also ensures thermal balance of different power stages. The settings of current sense, droop tuning, VCORE initial offset and over current protection are independent to compensation circuit of voltage loop. The feature greatly facilitates the flexibility of CPU power supply design and tuning.
The DAC output of RT9246A supports K8 CPU by 5-bit VID input, precise initial value & smooth VCORE transient at VID jump. The IC monitors the VCORE voltage for PGOOD and over-voltage protection. Soft-start, over-current protection and programmable under-voltage lockout are also provided to assure the safety of microprocessor and power system.
RT9246A controls both voltage and current loops to achieve good regulation, response & power stage thermal balance. Precise current loop using Inductor DCR as sense component builds precise load line for strict VRM DC & transient specification and also ensures thermal balance of different power stages. The settings of current sense, droop tuning, VCORE initial offset and over current protection are independent to compensation circuit of voltage loop. The feature greatly facilitates the flexibility of CPU power supply design and tuning.
The DAC output of RT9246A supports K8 CPU by 5-bit VID input, precise initial value & smooth VCORE transient at VID jump. The IC monitors the VCORE voltage for PGOOD and over-voltage protection. Soft-start, over-current protection and programmable under-voltage lockout are also provided to assure the safety of microprocessor and power system.
RT9246A Maximum Ratings
Supply Voltage, VCC -------------------------------------------------------------------------------7V
Input, Output or I/O Voltage --------------------------------------------GND-0.3V to VCC+0.3V
Power Dissipation, PD @ TA = 25°C TSSOP-28 -----------------------------------------------1W
Package Thermal Resistance (Note 4) TSSOP-28, JA -------------------------------100°C/W
Junction Temperature -------------------------------------------------------------------------150°C
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------260°C
Storage Temperature Range ----------------------------------------------------−65°C to 150°C
ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------- 2kV
MM (Machine Mode) -----------------------------------------------------------------------------200V
Input, Output or I/O Voltage --------------------------------------------GND-0.3V to VCC+0.3V
Power Dissipation, PD @ TA = 25°C TSSOP-28 -----------------------------------------------1W
Package Thermal Resistance (Note 4) TSSOP-28, JA -------------------------------100°C/W
Junction Temperature -------------------------------------------------------------------------150°C
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------260°C
Storage Temperature Range ----------------------------------------------------−65°C to 150°C
ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------- 2kV
MM (Machine Mode) -----------------------------------------------------------------------------200V
RT9246A Features
Multi-Phase Power Conversion with Automatic Phase Selection
K8 DAC Output with Active Droop Compensation for Fast Load Transient
Smooth VCORE Transition at VID Jump
Power Stage Thermal Balance by Inductor DCR Current Sense
Hiccup Mode Over-Current Protection
Programmable Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
High Ripple Frequency Times Channel Number
RoHS Compliant and 100% Lead (Pb)-Free
K8 DAC Output with Active Droop Compensation for Fast Load Transient
Smooth VCORE Transition at VID Jump
Power Stage Thermal Balance by Inductor DCR Current Sense
Hiccup Mode Over-Current Protection
Programmable Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
High Ripple Frequency Times Channel Number
RoHS Compliant and 100% Lead (Pb)-Free
RT9246A Typical Application
AMD® AthlonTM 64 and OpteronTM Processors Voltage Regulator
Low Output Voltage, High Current DC-DC Converters
Voltage Regulator Modules
Low Output Voltage, High Current DC-DC Converters
Voltage Regulator Modules
RT9246A Connection Diagram
/uploadfile/ic-mfg/407/46ef3d68-a31d-46a7-b093-b52d8b60a2e5.GIF
RT9248 General Description
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 architecture provides high output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The high equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient.
RT9248 controls both voltage and current loops to achieve good regulation, response & power stage thermal balance.
Precise current loop using RDS(ON) as sense component builds precise load line for strict VRM DC & transient specification and also ensures thermal balance of different power stages. The settings of current sense, droop tuning,
VCORE initial offset and over current protection are independent to compensation circuit of voltage loop. The feature greatly facilitates the flexibility of CPU power supply design and tuning.
The DAC output of RT9248 supports VRM9 & VRD10 by VID125 multi-level input, precise initial value & smooth VCORE transient at VID jump. The IC monitors the VCORE voltage for PGOOD and over-voltage protection. Soft-start,over-current protection and programmable under-voltage lockout are also provided to assure the safety of microprocessor
and power system.
RT9248 Maximum Ratings
Supply Voltage, VCC ----------------------------------------7V
Input, Output or I/O Voltage ----GND-0.3V to VCC+0.3V
Package Thermal Resistance
TSSOP-28, JA -------------------------------------45°C/W
Junction Temperature --------------------------------150°C
Lead Temperature (Soldering, 10 sec.) ---------- 260°C
Storage Temperature Range ----------−65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------- 2kV
MM (Machine Mode) -----------------------------------200V
Input, Output or I/O Voltage ----GND-0.3V to VCC+0.3V
Package Thermal Resistance
TSSOP-28, JA -------------------------------------45°C/W
Junction Temperature --------------------------------150°C
Lead Temperature (Soldering, 10 sec.) ---------- 260°C
Storage Temperature Range ----------−65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------- 2kV
MM (Machine Mode) -----------------------------------200V
RT9248 Features
·Multi-Phase Power Conversion with Automatic Phase Selection
·VRM9 & VRD10 DAC Output with Active Droop Compensation for Fast Load Transient
·Smooth VCORE Transition at VID Jump
·Multi-Level VID125 Input for VRM9 & VRD10 Selection
·Power Stage Thermal Balance by RDS(ON) Current Sense
·Hiccup Mode Over-Current Protection
·Programmable Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
·High Ripple Frequency Times Channel Number
·RoHS Compliant and 100% Lead (Pb)-Free
·VRM9 & VRD10 DAC Output with Active Droop Compensation for Fast Load Transient
·Smooth VCORE Transition at VID Jump
·Multi-Level VID125 Input for VRM9 & VRD10 Selection
·Power Stage Thermal Balance by RDS(ON) Current Sense
·Hiccup Mode Over-Current Protection
·Programmable Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
·High Ripple Frequency Times Channel Number
·RoHS Compliant and 100% Lead (Pb)-Free
RT9248 Typical Application
·Intel® Processors Voltage Regulator: VRM9 and VRD10
·Low Output Voltage, High Current DC-DC Converters
·Voltage Regulator Modules
·Low Output Voltage, High Current DC-DC Converters
·Voltage Regulator Modules
RT9248 Connection Diagram
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