Datasheet
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
INPUT VOLTAGE =
2.7V TO 5.0V
PGND
SWSTROBE
10µF
LED_OUT
EN
SGND
SCL
SDA
GPIO1
GPIO2
OFF
ON
I
2
C BUS
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.
10779-037
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
INPUT VOLTAGE =
2.7V TO 5.0V
PGND
SWSTROBE
10µF
LED_OUT
EN
SGND
SCL
SDA
GPIO1
GPIO2
OFF
ON
I
2
C BUS
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)
10779-038