LM46001-Q1 datasheet(7/55 Pages) TI1

Part #	LM46001-Q1

Description	3.5-V to 60-V, 1 A Synchronous Step-Down Voltage Converter

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LM46001-Q1

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SNVSAA3B – JULY 2015 – REVISED NOVEMBER 2017

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Ensured by design.

6.7 Switching Characteristics

Limits apply over the recommended operating junction temperature (TJ) range of –40°C to +125°C, unless otherwise stated.

Minimum and maximum limits are specified through test, design or statistical correlation. Typical values represent the most

likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated, the following

conditions apply: VIN = 24 V, VOUT = 3.3 V, FS = 500 kHz.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SW (SW PIN)

tON-MIN

(1)

Minimum high side MOSFET ON-

time

125

165

ns

tOFF-MIN

(1)

Minimum high side MOSFET OFF-

time

200

250

ns

OSCILLATOR (SW PINS AND SYNC PIN)

FOSC-

DEFAULT

Oscillator default frequency

RT pin open circuit

445

500

570

kHz

FADJ

Minimum adjustable frequency

With 1% resistors at RT pin

200

kHz

Maximum adjustable frequency

2200

kHz

Frequency adjust accuracy

10%

VSYNC-HIGH Sync clock high level threshold

2

V

VSYNC-LOW Sync clock low level threshold

0.4

V

DSYNC-MAX Sync clock maximum duty cycle

90%

DSYNC-MIN

Sync clock minimum duty cycle

10%

TSYNC-MIN

Minimum sync clock ON- and OFF-

time

80

ns

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LM46001-Q1 Datasheet(PDF) 7 Page - Texas Instruments

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