LTC7801EUFD datasheet(1/10 Pages) LINER

部件名	LTC7801EUFD

功能描述	High Input Voltage Synchronous Buck Converter

PDF	10 Pages

Scroll/Zoom	100%

制造商	LINER [Linear Technology]

网页	http://www.linear.com

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dc2641af

DEMO MANUAL DC2641A

DESCRIPTION

LTC7801EUFD

High Input Voltage

Synchronous Buck Converter

Demonstration circuit 2641A is a single output synchro-

nous buck converter featuring the LTC7801EUFD in the

24-lead QFN package. The input voltage range is from

16V to 100V and the output is 12V/10A. The DC2641A is

configured with a sense resistor for overcurrent protec-

tion. Inductor DCR current sensing is optional.

The board has a lot of features including an optional

onboard NMOS LDO for DRVCC, a switch-mode power

supply for EXTVCC, jumper selectable 100% duty cycle

operation in dropout, a mode selector pin that allows

the converter to run in CCM, pulse-skip, adjustable burst

L

, LT, LTC, LTM, Linear Technology, Burst Mode, PolyPhase and the Linear logo are registered

trademarks of Analog Devices, Inc. All other trademarks are the property of their respective

owners.

PERFORMANCE SUMMARY

clamp or default Burst Mode® operation, a PGOOD output

voltage monitor and PLLIN for PolyPhase® operation.

The LTC7801 data sheet gives a complete description

of the part, operation and application information and

must be read in conjunction with this demo manual for

DC2641A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2641A

Specifications are at TA = 25°C

PARAMETER

CONDITIONS

VALUE

Input Voltage Range

16V ~ 100V

Output Voltage VOUT

VIN = 16~100V, IOUT = 0~10A, JP4: FCM

12V ± 2% (11.76V ~ 12.24V)

Maximum Output Current IOUT,MAX

VIN = 16~100V

10A

Default Operating Frequency (Typical)

150kHz

External Clock Sync. Frequency Range

75kHz – 850kHz

Typical Full Load Efficiency (See Figure 4)

VIN = 48V, VOUT = 12V, IOUT = 10A, fSW = 150 kHz

95.3%

类似零件编号 - LTC7801EUFD

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Linear Technology	LTC7801	1Mb / 32P	Low IQ, 60V, High Frequency Synchronous Step-Down Controller
Linear Technology	LTC7801	2Mb / 38P	150V Low IQ, Synchronous Step-Down DC/DC Controller
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