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Part Number: SC2422A
Description: The SC2422A biphase, current mode controller is designed to work with Semtech smart synchronous drivers, such as the SC...
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SC2422A
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DataSheet
General Description
SC2422A General Description
The SC2422A biphase, current mode controller is designed to work with Semtech smart synchronous drivers, such as the SC1205, SC1305 or the SC1405 to provide the DC/DC converter solution for the most demanding Micro-processor applications. Input current rather than output current sensing is used to guarantee precision phase to phase current matching using a single sense resistor on the input power line. Accurate current sharing and pulse by pulse current limit are implemented without the power loss and transient response degradation associated with output current sense methods. Two phase operation allows significant reduction in input/output ripple while enhancing transient response.
The DAC step size and range are programmable with external components thus allowing compliance with new and emerging VID ranges.
A novel approach implements active droop, minimizing output capacitor requirements during load transients. This avoids the pitfalls of the passive droop implementation. This feature also allows easy implementation of N+1 redundancy and current sharing among modules.
Programmable Under Voltage Lockout assures proper start-up and shutdown by synchronizing the controller to the driver supply. Wide PWM frequency range allows use of low profile, surface mount components.
SC2422A Maximum Ratings
| Parameter | Symbol | Maximum | Units |
| Input DC Rail Voltage to GND | VIN | 15 | V |
| PGND to GND | + 1 | V | |
| Operating Temperature Range | TA | -20 to 125 | °C |
| Junction Temperature | TJ | 0 to 125 | °C |
| Thermal Resistance Junction to Case | JC | 20 | °C/W |
| Thermal Resistance Junction to Ambient | JA | 60 | °C/W |
| Storage Temperature Range | TSTG | -65 to +150 | °C |
| Lead Temperature (Soldering) 10 sec | TLEAD | 300 | °C |
SC2422A Features
• Precision, pulse by pulse phase current matching
• Active drooping allows for best transient response
• Input Sensing Current mode control
• Programmable DAC step size/offset allows Compliance with VRM9.0, VRM8.3 or VRM8.4
• Externally programmable soft-start
• 5V or 12V input for next generation processors
• 0% minimum duty cycle improves transient response
• Externally Programmable UVLO with hysteresis
• Cycle by cycle current limiting
• Programmable Internal Oscillator to 1 MHz
• VID IIIII Inhibit (No CPU)
• Active drooping allows for best transient response
• Input Sensing Current mode control
• Programmable DAC step size/offset allows Compliance with VRM9.0, VRM8.3 or VRM8.4
• Externally programmable soft-start
• 5V or 12V input for next generation processors
• 0% minimum duty cycle improves transient response
• Externally Programmable UVLO with hysteresis
• Cycle by cycle current limiting
• Programmable Internal Oscillator to 1 MHz
• VID IIIII Inhibit (No CPU)
SC2422A Typical Application
• Intel Advanced Microprocessors
• AMD AthlonTM power supplies
• Servers/Workstations, high density power supplies
• AMD AthlonTM power supplies
• Servers/Workstations, high density power supplies
SC2422A Connection Diagram
SC2422A
PDF/DataSheet Download
- Datasheet: SC2422A
- File Size: 117514 KB
- Manufacturer: SEMTECH [ Semtech Corporation ]
- Click here to Download
- ·SC200.....5. Series
- SCHOTTKY DIE 200 x 200 mils
- 156653 KB
- ·SC2000
- PHILIPS [Philips Semiconductors]
- Universal Timeslot Interchange
- 226362 KB
- ·SC2001
- Bus Exchanger
- 545919 KB
- ·SC2001G-10
- Bus Exchanger
- 545919 KB
- ·SC2001G-13
- Bus Exchanger
- 545919 KB
- ·SC2002
- ETC [ETC]
- 20 CHARACTERS x 2 LINES
- 65086 KB
- ·SC2002D
- ETC [ETC]
- LCD MODULE 20 CHARACTERS X 2 LINES
- 90048 KB
- ·SC2002F
- ETC [ETC]
- 20 CHARACTERS x 2 LINES
- 65086 KB
SC2422A Relative Products
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SC24-220-R
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SC24-1R0-R
INDUCTOR SHIELD 1UH 1000MA SMD
SC24-152-R
INDUCTOR SHIELD 1500UH 25MA SMD
SC24-102-R
INDUCTOR SHIELD 1000UH 30MA SMD
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