NX2141CMTR MICROSEMI [Microsemi Corporation], NX2141CMTR Datasheet

NX2141CMTR

Manufacturer Part Number

NX2141CMTR

Description

SINGLE CHANNEL MOBILE PWM CONTROLLER WITH FEEDFORWARD AND ENABLE

Manufacturer

MICROSEMI [Microsemi Corporation]

Datasheet

1.NX2141CMTR.pdf (21 pages)

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The NX2141 controller IC is a compact synchronous Buck

controller IC designed for step down DC to DC con-

verter applications with voltage feedforward functionality.

Voltage feedforward provides fast response, good line

regulation and nearly constant power stage gain under

wide voltage input range. The NX2141 controller is opti-

mized to convert single supply up to 24V bus voltage to

as low as 0.8V output voltage. Internal UVLO keeps the

regulator off until the supply voltage exceeds 7V where

internal digital soft starts get initiated to ramp up output.

The NX2141 employs fixed current limiting and FB UVLO

followed by hiccup feature. Other features includes: 5V

gate drive capability , Adaptive dead band control, avail-

able in 16 lead MLPQ and 10 lead MSOP package.

Rev. 1.6

05/15/07

+8 to 20V

NX2141CMTR

NX2141CUTR

Device

Vin1

Vin2

100uF

+5V

SINGLE CHANNEL MOBILE PWM CONTROLLER WITH

1nF

-40

Figure1 - Typical application of NX2141(MLPQ)

-40

Temperature

15nF

OFF

DESCRIPTION

2.3k

1uF

10k

C to 85

VCC

PGOOD

PVCC

COMP

Pgnd

VIN

Gnd

MLPQ-16L

MSOP-10L

Package

BST

Hdrv

Ldrv

MBR0530T1

n Less than 1uA shutdown current with Enable low

n Internal Digital Soft Start Function

n Start into precharged output

n Pb-free and RoHS compliant

1uH

Bus voltage operation from 7V to 24V

Excellent dynamic response with input voltage feed-

forward and voltage mode control

Fixed internal hiccup current limit

FB UVLO followed by hiccup feature

Power Good indicator available

Notebook PC

Graphic Card on board converters

On board DC to DC such as

12V to 3.3V, 2.5V or 1.8V

Set Top Box and LCD Display

FEEDFORWARD AND ENABLE

0.1uF

ORDERING INFORMATION

Frequency

TYPICAL APPLICATION

1uF

200kHz

1uH

2.2nF

1.5k

10k

32k

25TQC33M

25V,33uF

APPLICATIONS

ADVANCE DATA SHEET

2*2R5TPE220MC

(220uF,12mohm)

Pb Free Product

Pb-Free

FEATURES

Yes

NX2141

Vout

+1.05V 10A

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