LM25085A datasheet(5/31 Pages) TI1

Il numero della parte	LM25085A

Spiegazioni elettronici	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference

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Produttore elettronici	TI1 [Texas Instruments]

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LM25085A

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SNVS601A – JANUARY 2009 – REVISED MARCH 2009

Electrical Characteristics (continued)

Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C

to +125°C. Minimum and Maximum limits are guaranteed 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 = 24V, RT = 100 kΩ.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

tSS

Soft-start time

1.16

1.8

3.15

ms

Thermal Shutdown

TSD

Junction shutdown temperature

Junction temperature rising

170

°C

THYS

Junction shutdown hysteresis

20

°C

Thermal Resistance

θJA

Junction to ambient, 0 LFPM air

MSOP-8 package

126

°C/W

flow (3)

MSOP-8EP package

46

LLP-8 package

54

θJC

Junction to case, 0 LFPM air flow

MSOP-8 package

29

°C/W

(3)

MSOP-8EP package

5.5

LLP-8 package

9.1

(3)

Tested on a 4 layer JEDEC board. Four vias provided under the exposed pad. See JEDEC standards JESD51-5 and JESD51-7.

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