LT8607/LT8607B

1

Rev. D

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

42V, 750mA Synchronous

Step-Down Regulator with

2.5µA Quiescent Current

The LT®8607 is a compact, high efficiency, high speed syn-

chronous monolithic step-down switching regulator that

consumes only 1.7µA of non-switching quiescent current.

The LT8607 can deliver 750mA of continuous current.

Burst Mode operation enables high efficiency down to very

low output currents while keeping the output ripple below

topology allows the use of small inductors and results in

fast transient response and good loop stability. The EN/UV

pin has an accurate 1V threshold and can be used to pro-

reducing the input supply current to 1µA.

The MSOP package includes a SYNC pin to synchronize

to an external clock, or to select Burst Mode operation

or pulse-skipping with or without spread spectrum; the

TR/SS pin programs soft-start or tracking. The DFN

package omits these pins and can be purchased in pulse-

skipping or Burst Mode operation.

APPLICATIONS

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Wide Input Voltage Range: 3.0V to 42V

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High Efficiency 2MHz Synchronous Operation

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750mA Maximum Continuous Output

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Fast Minimum Switch-On Time: 35ns

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LT8607 Available in Fixed 5V Output

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Adjustable and Synchronizable: 200kHz to 2.2MHz

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Spread Spectrum Frequency Modulation for Low EMI

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Allows Use of Small Inductors

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Low Dropout

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Peak Current Mode Operation

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Accurate 1V Enable Pin Threshold

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Internal Compensation

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Output Soft-Start and Tracking

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Small Thermally Enhanced 10-Lead MSOP Package

or 8-Lead 2mm × 2mm DFN Package

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AEC-Q100 Qualified for Automotive Applications

General Purpose Step-Down Converter

Low EMI Step Down

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5V, 2MHz Step-Down

L = 4.7µH

0

125

250

375

500

625

750

50

55

60

65

70

75

80

85

90

95

100

8607 TA01b

PART NUMBER PACKAGE OUTPUT VOLTAGE SYNC FUNCTIONALITY

LT8607MSE

MSE

Programmable

Programmable

LT8607-5MSE MSE

Fixed 5V Out

Programmable

LT8607DFN

DFN

Programmable

Burst Mode Operation

LT8607BDFN

DFN

Programmable

Pulse-Skipping Mode

0.1µF

4.7µF

1µF

22µF

X7R

1206

10pF

4.7µH

18.2k

1MΩ

187k

100k

10nF

EN/UV

SYNC

LT8607

TR/SS

RT

GND

FB

PG

SW

BST

5.7V TO 42V

5V

750mA

POWER

GOOD

8607 TA01a