FAN48630UC45X(2012) データシートの表示（PDF） - Fairchild Semiconductor

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FAN48630UC45X
(Rev.:2012)

2.5 MHz, 1500 mA, Synchronous TinyBoost™ Regulator with Bypass Mode

Fairchild Semiconductor 

Pin Configuration

EN PG

VIN

A1

A2

A3

A4

VSEL AGND

VOUT

B1

B2

B3

B4

BYP

C1

C2

SW

C3

C4

AGND

PGND

D1

D2

D3

D4

Figure 3. Top Through View (Bumps Down)

Figure 4. Bottom View (Bumps Up)

Pin Definitions

Pin #

A1

Name

EN

A2

PG

A3–A4

B1

B2, C2

D1

B3–B4

VIN

VSEL

AGND

VOUT

C1

BYP

C3–C4

SW

D2–D4

PGND

Description

Enable. When this pin is HIGH, the circuit is enabled.

Power Good. This is an open-drain output. PG is actively pulled LOW if output falls out of

regulation due to overload or if thermal protection threshold is exceeded.

Input Voltage. Connect to Li-Ion battery input power source.

Output Voltage Select. When boost is running, this pin can be used to select output voltage.

Analog Ground. This is the signal ground reference for the IC. All voltage levels are measured

with respect to this pin.

Output Voltage. Place COUT as close as possible to the device.

Bypass. This pin can be used to activate Forced Bypass Mode. When this pin is LOW, the

bypass switches (Q3 and Q1) are turned on and the IC is otherwise inactive.

Switching Node. Connect to inductor.

Power Ground. This is the power return for the IC. The COUT bypass capacitor should be

returned with the shortest path possible to these pins.

© 2011 Fairchild Semiconductor Corporation

FAN48630 • Rev. 1.0.1

3

www.fairchildsemi.com

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