LTC7801HUFD#TRPBF

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Analog Devices Inc./Maxim Integrated

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

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LTC7801HUFD#TRPBF

Active

Analog Devices Inc./Maxim Integrated

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

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC7801 Series

The LTC7801 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 LTC7801 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.APPLICATIONSAutomotive and Industrial Power SystemsHigh Voltage Battery Operated SystemsTelecommunications Power Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC7801HUFD#TRPBF

Clock Sync	Yes, No
Control Features	Current Limit, Power Good, Soft Start, Tracking
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 / Case	24-WFQFN Exposed Pad
Package Length	4 mm
Package Name	24-QFN
Package Width	5 mm
Synchronous Rectifier	Yes, No
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	140 V
Voltage - Supply (Vcc/Vdd) Minimum	4 V

LTC7801 Series

Part	Clock Sync	Synchronous Rectifier	Control Features	Package Length	Package Name	Package Width	Number of Outputs	Mounting Type	Frequency - Switching (Min)	Frequency - Switching (Max)	Output Phases	Output Configuration	Function	Duty Cycle (Max)	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Package / Case	Topology	Output Type	Operating Temperature (Max)	Operating Temperature (Min)	Package Features
Analog Devices Inc./Maxim Integrated LTC7801IUFD#TRPBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	4 mm	24-QFN	5 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V	24-WFQFN Exposed Pad	Buck	Transistor Driver	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC7801HUFD#PBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	4 mm	24-QFN	5 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V	24-WFQFN Exposed Pad	Buck	Transistor Driver	150 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC7801HFE#PBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	0.173 in	24-TSSOP	4.4 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V		Buck	Transistor Driver	150 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7801EUFD#TRPBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	4 mm	24-QFN	5 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V	24-WFQFN Exposed Pad	Buck	Transistor Driver	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC7801HUFD#TRPBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	4 mm	24-QFN	5 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V	24-WFQFN Exposed Pad	Buck	Transistor Driver	150 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC7801IFE#PBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	0.173 in	24-TSSOP	4.4 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V		Buck	Transistor Driver	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7801HFE#TRPBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	0.173 in	24-TSSOP	4.4 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V		Buck	Transistor Driver	150 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7801EFE#TRPBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	0.173 in	24-TSSOP	4.4 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V		Buck	Transistor Driver	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7801IFE#TRPBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	0.173 in	24-TSSOP	4.4 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V		Buck	Transistor Driver	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7801EUFD#PBF	No Yes	No Yes	Current Limit Power Good Soft Start Tracking	4 mm	24-QFN	5 mm	1	Surface Mount	50 kHz	900 kHz	1	Positive	Step-Down	100 %	4 V	140 V	24-WFQFN Exposed Pad	Buck	Transistor Driver	125 °C	-40 °C

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R526 Reliability Data

LTC7801: 150V Low IQ, Synchronous Step-Down DC/DC Controller Data Sheet (Rev.A)

LTC7801HUFD#TRPBF | Datasheet