LTC7820EUFD#PBF

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Analog Devices Inc./Maxim Integrated

FIXED RATIO HIGH POWER INDUCTORLESS (CHARGE PUMP) DC/DC CONTROLLER

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LTC7820EUFD#PBF

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Analog Devices Inc./Maxim Integrated

FIXED RATIO HIGH POWER INDUCTORLESS (CHARGE PUMP) DC/DC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC7820 Series

The LTC7820 is a fixed ratio high voltage high power switched capacitor/charge pump controller. The device includes four N-channel MOSFET gate drivers to drive external power MOSFETs in voltage divider, doubler or inverter configurations. The device achieves a 2:1 step-down ratio from an input voltage as high as 72V, a 1:2 step-up ratio from an input voltage as high as 36V, or a 1:1 inverting ratio from an input voltage up to 36V. Each power MOSFET is switched with 50% duty cycle at a constant pre-programmed switching frequency. System efficiency can be optimized to over 99%. The LTC7820 provides a small and cost effective solution for high power, non-isolated intermediate bus applications with fault protection.The LTC7820 switching frequency can be linearly programmed from 100 kHz to 1MHz. The device is available in a thermally enhanced 28-lead QFN package with some no-connect pins for high voltage compatible pin spacing.ApplicationsBus ConvertersHigh Power Distributed Power SystemsCommunications SystemsIndustrial Applications

Technical Specifications

Parameters and characteristics for this part

Specification	LTC7820EUFD#PBF

Clock Sync	No
Control Features	Soft Start, Current Limit, Frequency Control, Enable, Power Good
Duty Cycle (Max)	50 %
Frequency - Switching (Max)	1 MHz
Frequency - Switching (Min)	100 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	28-WFQFN Exposed Pad
Package Length	4 mm
Package Name	28-QFN
Package Width	5 mm
Synchronous Rectifier	No
Topology	Buck, Boost
Voltage - Supply (Vcc/Vdd) Maximum	72 V
Voltage - Supply (Vcc/Vdd) Minimum	6 V

LTC7820 Series

Part	Package Width	Package Name	Package Length	Output Configuration	Number of Outputs	Function	Synchronous Rectifier	Frequency - Switching (Max)	Frequency - Switching (Min)	Output Type	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Clock Sync	Topology	Package / Case	Control Features	Output Phases	Duty Cycle (Max)	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Board Type	Supplied Contents	Total Output Count	Non-Isolated Output Count	Contents	Utilized IC / Part	Voltage - Input (Maximum)	Voltage - Input (Minimum)	Current - Output	Main Purpose	Frequency - Switching	Regulator Topology
Analog Devices Inc./Maxim Integrated LTC7820IUFD#TRPBF	5 mm	28-QFN	4 mm	Positive	1	Step-Down Step-Up	No	1 MHz	100 kHz	Transistor Driver	125 °C	-40 °C	Surface Mount	No	Boost Buck	28-WFQFN Exposed Pad	Current Limit Enable Frequency Control Power Good Soft Start Tracking	2	50 %	6 V	72 V
Analog Devices Inc./Maxim Integrated LTC7820IUFD#PBF	5 mm	28-QFN	4 mm	Positive	1	Step-Down Step-Up	No	1 MHz	100 kHz	Transistor Driver	125 °C	-40 °C	Surface Mount	No	Boost Buck	28-WFQFN Exposed Pad	Current Limit Enable Frequency Control Power Good Soft Start Tracking	2	50 %	6 V	72 V
Analog Devices Inc./Maxim Integrated LTC7820EUFD#PBF	5 mm	28-QFN	4 mm	Positive	1	Step-Down Step-Up	No	1 MHz	100 kHz	Transistor Driver	125 °C	-40 °C	Surface Mount	No	Boost Buck	28-WFQFN Exposed Pad	Current Limit Enable Frequency Control Power Good Soft Start	2	50 %	6 V	72 V
Analog Devices Inc./Maxim Integrated DC2543A										Non-Isolated												Fully Populated	Board(s)	1	1 count	Board	LTC7820	60 V	36 V	10 A	DC/DC Step Down	200 kHz	Buck
Analog Devices Inc./Maxim Integrated LTC7820EUFD#TRPBF	5 mm	28-QFN	4 mm	Positive	1	Step-Down Step-Up	No	1 MHz	100 kHz	Transistor Driver	125 °C	-40 °C	Surface Mount	No	Boost Buck	28-WFQFN Exposed Pad	Current Limit Enable Frequency Control Power Good Soft Start Tracking	2	50 %	6 V	72 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Datasheet

DC2543B Demo Manual (Rev.0)