LTC3895HFE#PBF

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Analog Devices

150V LOW IQ, SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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DocumentsR526 Reliability Data Datasheet

LTC3895HFE#PBF

Active

Analog Devices

150V LOW IQ, SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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DocumentsR526 Reliability Data Datasheet

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Technical Specifications

Parameters and characteristics for this part

Specification	LTC3895HFE#PBF

Clock Sync	False
Control Features	Enable, Phase Control, Power Good, Soft Start, Current Limit, Frequency Control
Duty Cycle (Max) [Max]	100 %
Frequency - Switching [Max]	900 kHz
Frequency - Switching [Min]	50 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	Exposed Pad, 38-TFSOP
Package / Case	31 Leads
Package / Case [custom]	0.173 "
Package / Case [custom]	4.4 mm
Supplier Device Package	38-TSSOP-EP
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	140 V
Voltage - Supply (Vcc/Vdd) [Min]	4 V

LTC3895 Series

150V Low IQ, Synchronous Step-Down DC/DC Controller

Part	Function	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Type	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Package / Case [custom]	Package / Case	Package / Case	Package / Case [custom]	Control Features	Output Configuration	Output Phases	Number of Outputs	Duty Cycle (Max) [Max]	Supplier Device Package	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]
Analog Devices LTC3895HFE	Step-Down	900 kHz	50 kHz	Transistor Driver	Surface Mount	150 °C	-40 °C	Buck	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	Positive	1	1	100 %	38-TSSOP-EP	140 V	4 V
Analog Devices LTC3895HFE#PBF	Step-Down	900 kHz	50 kHz	Transistor Driver	Surface Mount	150 °C	-40 °C	Buck	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	Positive	1	1	100 %	38-TSSOP-EP	140 V	4 V
Analog Devices LTC3895IFE#TRPBF	Step-Down	900 kHz	50 kHz	Transistor Driver	Surface Mount	125 ¯C	-40 °C	Buck	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	Positive	1	1	100 %	38-TSSOP-EP	140 V	4 V
Analog Devices LTC3895EFE#TRPBF	Step-Down	900 kHz	50 kHz	Transistor Driver	Surface Mount	125 ¯C	-40 °C	Buck	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	Positive	1	1	100 %	38-TSSOP-EP	140 V	4 V

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	$ 16.72
		10	$ 12.01
		25	$ 10.80
		100	$ 9.45
		250	$ 8.79
		500	$ 8.40
		1000	$ 8.34

Description

General part information

LTC3895 Series

The LTC3895 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz.The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs to maximize efficiency. An integrated switch in the top gate driver eliminates the need for an external bootstrap diode. An internal charge pump allows for 100% duty cycle operation.The low 40μA no-load quiescent current extends operating run time 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 LTC3895 features a precision 0.8V reference and power good output indicator. The output voltage can be programmed between 0.8V to 60V using external resistors or pin-programmed for a fixed 5V or 3.3V.ApplicationsAutomotive and Industrial Power SystemsHigh Voltage Battery Operated SystemsTelecommunications Power Systems