LTC3834-1 Series

30μA IQSynchronous Step-Down Controller

Catalog

30μA IQSynchronous Step-Down Controller

Part	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Frequency - Switching [Min]	Frequency - Switching [Max]	Output Configuration	Function	Topology	Supplier Device Package	Duty Cycle (Max) [Max]	Output Phases	Mounting Type	Package / Case [custom]	Package / Case [custom]	Package / Case [custom]	Output Type	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Control Features	Package / Case
Analog Devices LTC3834EFE#PBF	85 °C	-40 °C	1	250 kHz	530 kHz	Positive	Step-Down	Buck	20-TSSOP-EP	99.4 %	1	Surface Mount	0.173 in 4.4 mm	Exposed Pad	20-TSSOP	Transistor Driver	4 V	36 V	Enable Phase Control Power Good Soft Start Tracking
Analog Devices LTC3834EFE#TRPBF	85 °C	-40 °C	1	250 kHz	530 kHz	Positive	Step-Down	Buck	20-TSSOP-EP	99.4 %	1	Surface Mount	0.173 in 4.4 mm	Exposed Pad	20-TSSOP	Transistor Driver	4 V	36 V	Enable Phase Control Power Good Soft Start Tracking
Analog Devices LTC3834IDHC-1#PBF	85 °C	-40 °C	1	250 kHz	530 kHz	Positive	Step-Down	Buck	16-DFN (5x3)	99.4 %	1	Surface Mount				Transistor Driver	4 V	36 V	Enable Soft Start Tracking	16-WFDFN Exposed Pad

Catalog

30μA IQSynchronous Step-Down Controller

Key Features

• Wide Output Voltage Range: 0.8V VOUT10V

• Low Operating IQ: 30μA

• OPTI-LOOP®Compensation Minimizes COUT

• ±1% Output Voltage Accuracy

• Wide VINRange: 4V to 36V

• Phase-Lockable Fixed Frequency 140kHz to 650kHz

• Dual N-Channel MOSFET Synchronous Drive

• Very Low Dropout Operation: 99% Duty Cycle

• Adjustable Output Voltage Soft-Start or Tracking

• Output Current Foldback Limiting

• Output Overvoltage Protection

• Low Shutdown IQ: 4μA

• Selectable Continuous, Pulse-Skipping or

• Burst Mode®Operation at Light Loads

• Small 16-Lead Narrow SSOP or 5mm × 3mm DFN Package

Description

The LTC3834-1 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 30μA 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 LTC3834-1 features a precision 0.8V reference . The 4V to 36V input supply range encompasses a wide range of battery chemistries.The TRACK/SS pin ramps the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. An enhanced feature set part (LTC3834) is available.PHASMDEXTVCCPGOODPACKAGESLTC3834YesYesYesFE20/4mm × 5mm QFNLTC3834-1NoNoNoGN16/3mm × 5mm DFNApplicationsAutomotive SystemsTelecom SystemsBattery-Operated Digital DevicesDistributed DC Power Systems