(China (Mainland))
Product Summary
The LM2636M is a high speed controller designed specifically for use in synchronous DC/DC buck converters for advanced microprocessors. A 5-bit DAC accepts the VID code directly from the CPU and adjusts the output voltage from 1.3V to 3.5V. The LM2636M provides the power good, over-voltage protection, and output enable features as required by Intel VRM specifications. Current limiting is achieved by monitoring the voltage drop across the rDS_ON of the high side MOSFET, which eliminates an expensive current sense resistor. The LM2636M employs a fixed-frequency voltage mode PWM architecture.
Parametrics
LM2636M absolute maximum ratings: (1)VCC: 7V; (2)BOOTV: 18V; (3)Junction Temperature: 150℃; (4)DC Power Dissipation (Note 2): 1.42W; (5)Storage Temperature: -65 to +150℃; (6)Soldering Time, Temperature: Wave (4 seconds), 260℃; Infrared (10 seconds), 240℃; Vapor Phase (75 seconds), 219℃; (7)ESD Susceptibility (Note 3): 2 kV.
Features
LM2636M features: (1)1.3V to 3.5V 5-bit programmable output voltage; (2)Synchronous rectification; (3)Power Good flag and output enable; (4)Over-voltage protection; (5)Initial Output Accuracy: 1.5% over temperature; (6)Current limit without external sense resistor; (7)Adaptive non-overlapping MOSFET gate drives; (8)Adjustable switching frequency: 50 kHz to 1 MHz; (9)Dynamic output voltage positioning; (10)1.256V reference voltage available externally; (11)Plastic SO-20 package and TSSOP-20 package.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||
|---|---|---|---|---|---|---|---|---|---|---|
 |
 LM2636M/NOPB |
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IC REG SYNCH BUCK 5-BIT 20-SOIC |
Data Sheet |
Negotiable |
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 |
LM2636MTC/NOPB |
|
IC REG SYNCH BUCK 5-BIT 20-TSSOP |
Data Sheet |
Negotiable |
|
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|
LM2636MTCX/NOPB |
|
IC CTRLR PROG REG 5BIT 20TSSOP |
Data Sheet |
Negotiable |
|
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|
LM2636MX/NOPB |
|
IC CTRLR PROG REG 5BIT 20-SOIC |
Data Sheet |
Negotiable |
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