LTC3896HFE#PBF

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Analog Devices Inc./Maxim Integrated

150V LOW IQ, SYNCHRONOUS INVERTING DC/DC CONTROLLER

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LTC3896HFE#PBF

Active

Analog Devices Inc./Maxim Integrated

150V LOW IQ, SYNCHRONOUS INVERTING DC/DC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3896 Series

The LTC3896 is a high performance inverting DC/DC switching regulator controller that drives an all N-channel synchronous power MOSFET stage. It converts a wideranging positive input voltage source to a regulated negative output that can be as much as 60V below ground. The input can operate from a voltage as low as 4V and as high as 140V – |VOUT–|.The LTC3896 contains true ground-referenced RUN, PLLIN and PGOOD pins, eliminating the need for external discrete level-shifting components to interface with the LTC3896.A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. 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 LTC3896 features a precision 0.8V reference and power good output indicator. The soft-start (SS) pin ramps the output voltage during start-up.ApplicationsAutomotive and Industrial Power SystemsTelecommunications Power SuppliesDistributed Power Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3896HFE#PBF

Clock Sync	No
Control Features	Soft Start, Current Limit, Power Good, Phase Control, Frequency Control, Enable
Duty Cycle (Max)	99 %
Frequency - Switching (Max)	900 kHz
Frequency - Switching (Min)	50 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Negative
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	No
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) Maximum	140 V
Voltage - Supply (Vcc/Vdd) Minimum	4 V

LTC3896 Series

Part	Duty Cycle (Max)	Control Features	Number of Outputs	Topology	Clock Sync	Package Name	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Synchronous Rectifier	Output Configuration	Frequency - Switching (Min)	Frequency - Switching (Max)	Output Type	Function	Package Length	Package Features	Package Width	Output Phases
Analog Devices Inc./Maxim Integrated LTC3896IFE#TRPBF	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	125 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1
Analog Devices Inc./Maxim Integrated LTC3896HFE#TRPBF	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	150 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1
Analog Devices Inc./Maxim Integrated LTC3896IFE#PBF	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	125 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1
Analog Devices Inc./Maxim Integrated LTC3896EFE#PBF	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	125 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1
Analog Devices Inc./Maxim Integrated LTC3896EFE#TRPBF	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	125 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1
Analog Devices Inc./Maxim Integrated LTC3896HFE#PBF	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	150 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1
Analog Devices Inc./Maxim Integrated LTC3896HFE	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start	1	Buck-Boost	No	38-TFSOP 38-TSSOP-EP	4 V	140 V	150 °C	-40 °C	Surface Mount	No	Negative	50 kHz	900 kHz	Transistor Driver	Step-Down Step-Up	0.173 in	31 Leads Exposed Pad	4.4 mm	1

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Datasheet

DC2447A - Demo Manual (Rev.A)

R526 Reliability Data