LTC3770EG#PBF

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Analog Devices

FAST NO RSENSE™STEP-DOWN SYNCHRONOUS CONTROLLER WITH MARGINING, TRACKING AND PLL

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LTC3770EG#PBF

Active

Analog Devices

FAST NO RSENSE™STEP-DOWN SYNCHRONOUS CONTROLLER WITH MARGINING, TRACKING AND PLL

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DocumentsDatasheet R384 Reliability Data

Specifications Pricing Series Description Documents

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	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	Control Features	Function	Output Configuration	Topology	Output Type	Output Phases	Package / Case [custom]	Package / Case	Package / Case [custom]
Analog Devices LTC3770EUH#PBF	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 LTC3770EG#PBF	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 LTC3770EUH#TRPBF	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