LTC3895HFE

Obsolete

Analog Devices Inc./Maxim Integrated

IC POWER MANAGEMENT

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LTC3895HFE

Obsolete

Analog Devices Inc./Maxim Integrated

IC POWER MANAGEMENT

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Description Specifications Series Pricing CAD Documents

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

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3895HFE

Clock Sync	No
Control Features	Soft Start, Current Limit, Power Good, Phase Control, Frequency Control, Enable
Duty Cycle (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 Features	31 Leads, Exposed Pad
Package Length	0.173 in
Package Name	38-TSSOP-EP, 38-TFSOP
Package Width	4.4 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	140 V
Voltage - Supply (Vcc/Vdd) Minimum	4 V

LTC3895 Series

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

Part	Operating Temperature (Min)	Operating Temperature (Max)	Output Phases	Package Length	Package Features	Package Name	Package Width	Output Type	Number of Outputs	Control Features	Clock Sync	Synchronous Rectifier	Output Configuration	Mounting Type	Topology	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Function	Frequency - Switching (Min)	Frequency - Switching (Max)	Duty Cycle (Max)
Analog Devices Inc./Maxim Integrated LTC3895HFE#TRPBF	-40 °C	150 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %
Analog Devices Inc./Maxim Integrated LTC3895IFE#PBF	-40 °C	125 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %
Analog Devices Inc./Maxim Integrated LTC3895HFE	-40 °C	150 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %
Analog Devices Inc./Maxim Integrated LTC3895EFE#PBF	-40 °C	125 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %
Analog Devices Inc./Maxim Integrated LTC3895HFE#PBF	-40 °C	150 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %
Analog Devices Inc./Maxim Integrated LTC3895IFE#TRPBF	-40 °C	125 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %
Analog Devices Inc./Maxim Integrated LTC3895EFE#TRPBF	-40 °C	125 °C	1	0.173 in	31 Leads Exposed Pad	38-TFSOP 38-TSSOP-EP	4.4 mm	Transistor Driver	1	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	No	Yes	Positive	Surface Mount	Buck	4 V	140 V	Step-Down	50 kHz	900 kHz	100 %

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3895HFE | Datasheet