Microsemi

Analog Mixed Signal Group

NX2158

1

Rev.1.2

12/30/09

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Figure1 - Typical application of NX2158

TYPICAL APPLICATION

DESCRIPTION

n Single Supply Voltage fom 3V to 5.5V

n Programmable Frequency up to 2MHz

n Internal Digital Soft Start Function

n Cycle by Cycle Current Limit by Sensing Rdson of

NMOSFET

n Pb-free and RoHS compliant

FEATURES

PWM BOOST CONTROLLER

APPLICATIONS

PRODUCTION DATA SHEET

The NX2158 controller IC is a boost controller IC de-

signed for step up DC to DC converter applications. The

NX2158 operates at programmable frequency from

200kHz to 2MHz and employs cycle by cycle current

limiting by sensing the Rdson of NMOSFET.

Other features of the device are: thermal shutdown,

adaptive deadband control, internal digital soft start, VCC

UVLO and Shutdown capability via the ENBUS pin.

Pb Free Product

n USB 3.0 3.3V to 5V conversion

ORDERING INFORMATION

Device

Temperature

Package

Frequency

Pb-Free

NX2158CMTR

3X3 MLPQ-16L 200kHz to 2MHz

Yes

Package Marking : NX2158XXX XXX is date code. For example, 935 means that this NX2158 is

packaged in the 35th week of 2009

VIN 3.3V

VOUT 5V

ENBUS

VCC LDrv

SW

HDrv

BST

PGND

EN

FB

COMP

PGOOD

PGOOD

RT

OCP

AGND

2.2uH

22uF,X5R

2*22uF

1uF

14k

68p

308k

59k

1nF

20k

15pF

22k

10k

10k

10

1uF