LTC3892 Series

60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

Catalog

60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

Part	Package / Case	Package / Case [custom]	Package / Case [x]	Mounting Type	Duty Cycle (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Phases	Output Configuration	Function	Number of Outputs	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Supplier Device Package	Topology	Control Features
Analog Devices LTC3892MPFE-1#PBF	28-TSSOP Exposed Pad	4.4 mm	0.173 in	Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-55 °C	150 °C	4.5 V	60 V	28-TSSOP-EP	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892EUH-2#PBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-40 °C	125 ¯C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892IUH-2#PBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-40 °C	125 ¯C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892IUH-2#TRPBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-40 °C	125 ¯C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892MPUH-2#TRPBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-55 °C	150 °C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892IUH#PBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-40 °C	125 ¯C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892HUH-2#TRPBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-40 °C	150 °C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892MPUH#PBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-55 °C	150 °C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking
Analog Devices LTC3892MPUH#TRPBF				Surface Mount	99 %	535 kHz 835 kHz	105 kHz 350 kHz	2	Positive	Step-Down	2	Transistor Driver	-55 °C	150 °C	4.5 V	60 V	32-QFN (5x5)	Buck	Current Limit Enable Frequency Control Power Good Soft Start Tracking

Catalog

60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

Key Features

• Wide VINRange: 4.5V to 60V (65V Abs Max)

• Wide Output Voltage Range: 0.8V ≤ VOUT≤ 99% • VIN

• Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)

• No External Bootstrap Diodes Required

• Low Operating IQ: 29μA (One Channel On)

• Selectable Gate Drive UVLO Thresholds

• Out-of-Phase Operation Reduces Required Input Capacitance and Power Supply Induced Noise

• Phase-Lockable Frequency: 75kHz to 850kHz

• Selectable Continuous, Pulse Skipping or Low Ripple Burst Mode®Operation at Light Loads

• Selectable Current Limit (LTC3892/LTC3892-2)

• Very Low Dropout Operation: 99% Duty Cycle

• Power Good Output Voltage Monitors (LTC3892/LTC3892-2)

• Low Shutdown IQ: 3.6μA

• Small 32-Lead 5mm × 5mm QFN Package (LTC3892/LTC3892-2) or TSSOP Package (LTC3892-1)

Description

The LTC3892/LTC3892-1/LTC3892-2 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. Power loss and noise are minimized by operating the two controller output stages out-of-phase.The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs and to maximize efficiency. Internal switches in the top gate drivers eliminate the need for external bootstrap diodes.A wide 4.5V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Output voltages up to 99% of VINcan be regulated. OPTI-LOOP®compensation allows the transient response and loop stability to be optimized over a wide range of output capacitance and ESR values.The 29μA no-load quiescent current extends operating run time in battery powered systems.ApplicationsAutomotive and Industrial Power SystemsDistributed DC Power SystemsHigh Voltage Battery Operated Systems