© 2008 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN5361 • Rev. 1.1.0

2

Ordering Information

Part Number

Output

Voltage

(1)

Package

Temperature Range

Packing

FAN5361UC123X

1.233V

WLCSP-6, 0.4mm Pitch

–40 to +85°C

Tape and Reel

FAN5361UC182X

1.820V

FAN5361UMP123X

1.233V

6-Lead, 2 x 2mm UMLP

FAN5361UMP15X

1.500V

FAN5361UMP182X

1.820V

Note:

1.

Other voltage options available on request. Contact a Fairchild representative.

Pin Configurations

C1

B1

A1

C2

B2

A2

MODE

SW

FB

VIN

EN

GND

Figure 2. WLCSP, Bumps Facing Down

Figure 3. WLCSP, Bumps Facing Up

Figure 4. UMLP, Leads Facing Down

Pin Definitions

Pin #

Name Description

WLCSP UMLP

A1

3

MODE

MODE. Logic 1 on this pin forces the IC to stay in PWM mode. A logic 0 allows the IC to

automatically switch to PFM during light loads. The regulator also synchronizes its switching

frequency to four times the frequency provided on this pin. Do not leave this pin floating.

B1

2

SW

Switching Node. Connect to output inductor.

C1

1

FB

C2

6

GND Ground. Power and IC ground. All signals are referenced to this pin.

B2

5

EN

Enable. The device is in shutdown mode when voltage to this pin is <0.4V and enabled when

>1.2V. Do not leave this pin floating.

A2

4

VIN

Input Voltage. Connect to input power source.