
	Microsemi Electronic Components Datasheet

LX7169 Datasheet

3A Step-Down Converter

No Preview Available !

LX7169

® 3A Step-Down Converter

PRODUCTION DATASHEET

DESCRIPTION

KEY FEATURES

LX7169 is a step-down PWM Switching Other features of the part are:

regulator IC with integrated high side P-

a) Cycle-by-cycle current limit

Channel and low side N-Channel followed by HICCUP mode which

MOSFETs. The IC operates using a reduces the overall power dissipation of

hysteretic control topology with a full load the internal MOSFETs

operating frequency of 3MHz. This

switching frequency allows for small output

filter components while maintaining

b) Thermal protection and internal

digital soft start.

excellent dynamic load response.

The LX7169 also provides a Power Good

The operational input voltage range of

LX7169 is from 3V to 5.5V. The SYNC

function. The LX7169 is available in a 12L

3mm x 3.5mm DFN package.

pin is tied low when not in use. A clock

signal to this pin will synchronize the

converter to an external source.

In the shutdown mode, the IC’s current

consumption is reduced to less than 1mA

and the output capacitor is discharged.

 3A Step-down Regulator

 Operational Input Supply Voltage

Range: 3V-5.5V

 Integrated PMOS and NMOS

 Load Current from zero to 3A

 3MHz Switching Frequency

 Input UVLO Protection

 Enable Pin

 Power Good

 Internal Soft-start

 Cycle-by-Cycle Over Current

Protection

 Hiccup Mode Operation Under

OCP

 RoHS Compliant for Pb Free

APPLICATIONS

 HDD

 Set-Top Box

 LCD TV’s

 Notebook/Netbook

 Routers

 Video Cards

 PC Peripherals

 PoE Powered Devices

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

PRODUCT HIGHLIGHT

VIN = 3V

to 5.5V

10µF

X5R

0.01

µF

1µF

Output Capacitor Range is

from 22µf to100µF

Output Inductor Range is

from 0.47µH to 1µH

PVIN

100k

PGOOD

VCC

EN LX7169

SYNC

GND

VOUT

Power PAD

PGOOD

0.47µF

VOUT

22µF

X5R

TA (C)

PACKAGE ORDER INFO

LD 12L DFN (3.0 x 3.5 mm)

RoHS Compliant / Pb-free

THERMAL DATA

JA = 36C/W

THERMAL RESISTANCE-JUNCTION TO AMBIENT

-10 to +85

LX7169CLD

Note: Available in Tape & Reel. Append the letters “TR” to the part number.

(i.e. LX7169CLD-TR)

Junction Temperature Calculation: TJ = TA + (PD x JA).

The JA numbers are guidelines for the thermal performance of the

device/pc-board system. All of the above assume no ambient airflow.

JA number above is with 4-layer PCB board.

Rev. 1.1 2013-01-16

Microsemi

Analog Mixed Signal Group

One Enterprise Aliso Viejo, CA 92656 USA, 1-800-713-4113, 949-380-6100, fax 949-215-4996

Page 1


	Microsemi Electronic Components Datasheet

LX7169 Datasheet

3A Step-Down Converter

No Preview Available !

LX7169

® 3A Step-Down Converter

PRODUCTION DATASHEET

AABSOLUTE MAXIMUM RATINGS

PVIN, VCC, EN, FB, PGOOD, VOUT, SYNC.................................................-0.3V to 7V

SW .....................................................................................................................-0.3V to 7V

SW (Shorter than 50ns) ....................................................................................... -2V to 7V

Maximum Operating Junction Temperature ................................................-10C to 150°C

Storage Temperature Range.........................................................................-65C to 150C

Peak Package Solder Reflow Temp. (40 seconds maximum exposure)......... 260°C (+0,-5)

Notes: Exceeding these ratings could cause damage to the device. All voltages are with respect to GND.

Currents are positive into, negative out of specified terminal. These are stress ratings only and

functional operation of the device at these or any other conditions beyond those indicated under

“Recommended Operating Conditions” are not implied. Exposure to “Absolute Maximum Ratings”

for extended periods may affect device reliability.

PACKAGE PIN OUT

FB 1

VOUT 2

GND 3

GND 4

SW 5

SW 6

12 SYNC

11 PGOOD

10 EN

9 VCC

8 PVIN

7 PVIN

LD PACKAGE

(Top View)

Exposed Pad = GND

xxxx = Date/Lot Code

RoHS / Pb-free 100% Matte Tin Lead

Finish

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature of -10C  TA  85C except where

otherwise noted with the following test conditions: VCC = PVIN = 5V. Typical parameter refers to TJ=25°C

Parameters

Symbol Test Conditions/Comments

Min Typ Max Units

Recommended Operating Range

VCC, PVIN

3 5.5 V

Operating Current

Input Current

IQ ILOAD = 0

12 mA

Input Current at Shut Down

VCC Input UVLO

Under Voltage Lockout

IIN EN = GND

VCC

VCC rising

0.001 1

2.4 2.8

UVLO Hysteresis

Feedback

Feedback Voltage Internal

Reference

VREF

TA = 25°C

Temperature range

230 mV

0.792 0.800 0.808

0.788

0.812

FB Pin Input Current

IFB

Line Regulation

VIN from 3V to 5.5V

Load Regulation

ILOAD = 0.5 to 3A

Vout Voltage Positioning

Transient Response

FB UVLO

VREG

Vout = 1.2V, Hysteretic Mode

Load from 0.1 to 1.5 amps, TR =TF = 100ns,

VOUT = 1.2V COUT = 44µF

FB UVLO Threshold

VFBULVO

Rev. 1.1 2013-01-16

Microsemi

Analog Mixed Signal Group

One Enterprise Aliso Viejo, CA 92656 USA, 1-800-713-4113, 949-380-6100, fax 949-215-4996

0.30

-0.10

+/-40

70%

10 nA

%/A

VREF

Page 2

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf

LX7169 Datasheet

3A Step-Down Converter

LX7169 Datasheet

3A Step-Down Converter

Similar Datasheet

Part Number Start With