LM3488MMX datasheet(6/37 Pages) TI

Nome de Peças	LM3488MMX

Descrição Electrónicos	LM3488/-Q1 High-Efficiency, Low-Side, N-Channel Controller for Switching Regulators

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Fabricante Electrônico	TI [Texas Instruments]

Página de início	http://www.ti.com

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LM3488, LM3488-Q1

SNVS089N – JULY 2000 – REVISED DECEMBER 2014

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Electrical Characteristics (continued)

Unless otherwise specified, VIN = 12 V, RFA = 40 kΩ, TJ = 25°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VEAO

Error Amplifier Output Voltage Swing

Upper Limit: VFB = 0 V, COMP Pin

2.2

V

= Floating

Upper Limit: VFB = 0 V, COMP Pin

1.8

2.4

= Floating,

−40°C ≤ TJ ≤ 125°C

Lower Limit: VFB = 1.4 V

0.56

V

Lower Limit: VFB = 1.4 V, −40°C ≤

0.2

1.0

TJ ≤ 125°C

TSS

Internal Soft-Start Delay

VFB = 1.2 V, VCOMP = Floating

4

ms

Tr

Drive Pin Rise Time

Cgs = 3000 pf, VDR = 0 to 3 V

25

ns

Tf

Drive Pin Fall Time

Cgs = 3000 pf, VDR = 0 to 3 V

25

ns

VSD

Shutdown and Synchronization signal

Output = High

1.27

V

threshold (6)

Output = High,

−40°C ≤ TJ ≤ 125°C

1.4

Output = Low

0.65

V

Output = Low,

−40°C ≤ TJ ≤ 125°C

0.3

ISD

Shutdown Pin Current

VSD = 5 V

−1

µA

VSD = 0 V

+1

IFB

Feedback Pin Current

15

nA

TSD

Thermal Shutdown

165

°C

Tsh

Thermal Shutdown Hysteresis

10

°C

(6)

The FA/SYNC/SD pin should be pulled to VIN through a resistor to turn the regulator off.

6

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Product Folder Links: LM3488 LM3488-Q1

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