ADP1649

Data Sheet

Rev. 0 | Page 16 of 28

Figure 37. Voltage Regulation Mode: LED Driver Application

Figure 38. Voltage Regulation Mode: Class-D Audio Application

ADP1649

10µF

1.0µH

PGND

SW

STROBE

10µF

LED_OUT

EN

SGND

SCL

SDA

GPIO1

GPIO2

OFF

ON

SDA, SCL

EN

APPLICATIONS PROCESSOR

3.2 MEGAPIXEL

TO 5.0 MEGAPIXEL

CMOS IMAGE SENSOR

POWER-ON RESET

VOUT = 5.0V

KEYPAD

LED DRIVER

VDD

GND

VOUT*

VIN

*THE VOUT PIN IS CONNECTED TO THE SW NODE WHEN THE ADP1649 IS NOT ENABLED. VOUT SHOULD NOT BE CONNECTED DIRECTLY TO A POSITIVE

EXTERNAL VOLTAGE SOURCE BECAUSE THIS CAUSES CURRENT TO FLOW FROM VOUT TO THE BATTERY.

VOUT = 5.0V ±8.5%, IMAX = 500mA

SHUTDOWN

VDD

OUT+

OUT–

IN+

GND

SD

AUDIO IN–

AUDIO IN+

SSM2315

80kΩ

80kΩ

160kΩ

160kΩ

BIAS

0.1µF

ADP1649

10µF

1.0µH

PGND

SW

STROBE

10µF

LED_OUT

EN

SGND

SCL

SDA

GPIO1

GPIO2

OFF

ON

SDA, SCL

EN

APPLICATIONS

PROCESSOR

3.2 TO 5.0 MEGAPIXEL

CMOS IMAGE SENSOR

POWER-ON

RESET

VOUT

VIN

IN–

47nF

47nF

FET

DRIVER

POP/CLICK

SUPPRESSION

INTERNAL

OSCILLATOR

MODULATOR

(Σ-Δ)