LTC7820EUFD#PBF

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Analog Devices

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

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DocumentsDC2543B Demo Manual (Rev.0)Datasheet

LTC7820EUFD#PBF

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Analog Devices

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

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DocumentsDC2543B Demo Manual (Rev.0)Datasheet

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC7820EUFD#PBF

Clock Sync	False
Control Features	Current Limit, Power Good, Soft Start, Frequency Control, Enable
Duty Cycle (Max) [Max]	50 %
Frequency - Switching [Max]	1 MHz
Frequency - Switching [Min]	100 kHz
Function	Step-Down, Step-Up
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
Supplier Device Package	28-QFN (4x5)
Synchronous Rectifier	False
Topology	Boost, Buck
Voltage - Supply (Vcc/Vdd) [Max]	72 V
Voltage - Supply (Vcc/Vdd) [Min]	6 V

LTC7820 Series

Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller

Part	Function	Supplier Device Package	Package / Case	Mounting Type	Number of Outputs	Duty Cycle (Max) [Max]	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]	Control Features	Topology	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Type	Output Phases	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Main Purpose	Board Type	Current - Output	Outputs and Type	Outputs and Type	Voltage - Input [Max]	Voltage - Input [Min]	Supplied Contents	Frequency - Switching	Regulator Topology	Utilized IC / Part
Analog Devices LTC7820EUFD#PBF	Step-Down Step-Up	28-QFN (4x5)	28-WFQFN Exposed Pad	Surface Mount	1	50 %	Positive	-40 °C	125 ¯C	Current Limit Enable Frequency Control Power Good Soft Start	Boost Buck	1 MHz	100 kHz	Transistor Driver	2	72 V	6 V
Analog Devices DC2543A																		DC/DC Step Down	Fully Populated	10 A	Non-Isolated	1	60 V	36 V	Board(s)	200 kHz	Buck	LTC7820
Analog Devices LTC7820EUFD#TRPBF	Step-Down Step-Up	28-QFN (4x5)	28-WFQFN Exposed Pad	Surface Mount	1	50 %	Positive	-40 °C	125 ¯C	Current Limit Enable Frequency Control Power Good Soft Start Tracking	Boost Buck	1 MHz	100 kHz	Transistor Driver	2	72 V	6 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	$ 10.26
		10	$ 7.31
		25	$ 7.01

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