LTC3770EG#PBF
ActiveFAST NO RSENSE™STEP-DOWN SYNCHRONOUS CONTROLLER WITH MARGINING, TRACKING AND PLL
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LTC3770EG#PBF
ActiveFAST NO RSENSE™STEP-DOWN SYNCHRONOUS CONTROLLER WITH MARGINING, TRACKING AND PLL
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3770EG#PBF |
|---|---|
| Clock Sync | False |
| Control Features | Current Limit, Soft Start, On Time Control, Tracking, Power Good, Enable |
| Duty Cycle (Max) [Max] | 90 % |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 28-SSOP |
| Package / Case [custom] | 0.209 in |
| Package / Case [custom] | 5.3 mm |
| Supplier Device Package | 28-SSOP |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 32 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4 V |
LTC3770 Series
Fast No RSENSE™Step-Down Synchronous Controller with Margining, Tracking and PLL
| Part | Clock Sync | Duty Cycle (Max) [Max] | Mounting Type | Number of Outputs | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Supplier Device Package | Synchronous Rectifier | Control Features | Function | Output Configuration | Topology | Output Type | Output Phases | Package / Case [custom] | Package / Case | Package / Case [custom] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 90 % | Surface Mount | 1 | 4 V | 32 V | 85 °C | -40 °C | 32-QFN (5x5) | Current Limit Enable On Time Control Power Good Soft Start Tracking | Step-Down | Positive | Buck | Transistor Driver | 1 | |||||
Analog Devices | 90 % | Surface Mount | 1 | 4 V | 32 V | 85 °C | -40 °C | 28-SSOP | Current Limit Enable On Time Control Power Good Soft Start Tracking | Step-Down | Positive | Buck | Transistor Driver | 1 | 0.209 in | 28-SSOP | 5.3 mm | ||
Analog Devices | 90 % | Surface Mount | 1 | 4 V | 32 V | 85 °C | -40 °C | 32-QFN (5x5) | Current Limit Enable On Time Control Power Good Soft Start Tracking | Step-Down | Positive | Buck | Transistor Driver | 1 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 8.99 | |
| 10 | $ 6.34 | |||
Description
General part information
LTC3770 Series
The LTC3770 is a synchronous step-down switching regulator controller with output voltage up/down tracking capability and voltage margining. Its advanced functions and high accuracy reference are ideal for powering high performance server, ASIC and computer memory systems.The LTC3770 uses a constant on-time, valley current mode control architecture to deliver very low duty factors without requiring a sense resistor. The operating frequency is selected by an external resistor and is compensated for variations in input supply voltage. An internal phase-lock loop allows the IC to be synchronized to an external clock.Fault protection is provided by an overvoltage comparator and input undervoltage lockout. The regulator current limit is user programmable. A wide supply range allows voltages as high as 32V to be stepped down to as low as a 0.6V output. Power supply sequencing is accomplished using an external soft-start timing capacitor.ApplicationsDistributed Power SystemsServer Power Supply
Documents
Technical documentation and resources