LTC3835IUFD#TRPBF

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Analog Devices Inc./Maxim Integrated

LOW IQSYNCHRONOUS STEP-DOWN CONTROLLER

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LTC3835IUFD#TRPBF

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Analog Devices Inc./Maxim Integrated

LOW IQSYNCHRONOUS STEP-DOWN CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3835 Series

The LTC3835 is a high performance step-down switching regulator controller that drives an all N-channel synchronous power MOSFET stage. A constant-frequency current mode architecture allows a phase-lockable frequency of up to 650kHz.The 80μA no-load quiescent current extends operating life in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3835 features a precision 0.8V reference and a power good output indicator. The 4V to 36V input supply range encompasses a wide range of battery chemistries.The TRACK/SS pin ramps the output voltage during startup. Current foldback limits MOSFET heat dissipation during short-circuit conditions.Comparison of LTC3835 and LTC3835-1PART #CLKOUT/PHASMDEXTVCCPGOODPACKAGESLTC3835YesYesYesFE20/4 × 5 QFNLTC3835-1NoNoNoGN16/3 × 5 DFNApplicationsAutomotive SystemsTelecom SystemsBattery-Operated Digital DevicesDistributed DC Power SystemsAll registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 5408150, 5481178, 5705919, 5929620, 6304066, 6498466, 6580258, 6611131.

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3835IUFD#TRPBF

Clock Sync	No
Control Features	Phase Control, Enable, Power Good, Tracking, Soft Start
Duty Cycle (Max)	99.4 %
Frequency - Switching (Max)	530 kHz
Frequency - Switching (Min)	250 kHz
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	20-WFQFN Exposed Pad
Package Length	4 mm
Package Name	20-QFN
Package Width	5 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	36 V
Voltage - Supply (Vcc/Vdd) Minimum	4 V

LTC3835 Series

Part	Frequency - Switching (Max)	Frequency - Switching (Min)	Control Features	Package Name	Duty Cycle (Max)	Output Type	Topology	Mounting Type	Clock Sync	Synchronous Rectifier	Number of Outputs	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Package Width	Package Features	Package Length	Function	Output Phases	Output Configuration	Operating Temperature (Max)	Operating Temperature (Min)	Package / Case
Analog Devices Inc./Maxim Integrated LTC3835EFE#TRPBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-TSSOP 20-TSSOP-EP	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	4.4 mm	Exposed Pad	0.173 in	Step-Down	1	Positive	85 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3835EUFD#TRPBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-QFN	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	5 mm		4 mm	Step-Down	1	Positive	85 °C	-40 °C	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3835EUFD#PBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-QFN	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	5 mm		4 mm	Step-Down	1	Positive	85 °C	-40 °C	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3835EFE#PBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-TSSOP 20-TSSOP-EP	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	4.4 mm	Exposed Pad	0.173 in	Step-Down	1	Positive	85 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3835IFE#PBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-TSSOP 20-TSSOP-EP	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	4.4 mm	Exposed Pad	0.173 in	Step-Down	1	Positive	85 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3835IUFD#TRPBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-QFN	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	5 mm		4 mm	Step-Down	1	Positive	85 °C	-40 °C	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3835IFE#TRPBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-TSSOP 20-TSSOP-EP	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	4.4 mm	Exposed Pad	0.173 in	Step-Down	1	Positive	85 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3835IUFD#PBF	530 kHz	250 kHz	Enable Phase Control Power Good Soft Start Tracking	20-QFN	99.4 %	Transistor Driver	Buck	Surface Mount	No	Yes	1	4 V	36 V	5 mm		4 mm	Step-Down	1	Positive	85 °C	-40 °C	20-WFQFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3835IUFD#TRPBF | Datasheet

Tape and Reel Packaging

LTC3835: Low IQSynchronous Step-Down Controller Data Sheet (Rev.F)

R384 Reliability Data