
AL3158
HIGH EFFICIENCY 1x/2x CHARGE PUMP
FOR WHITE LED APPLICATIONS
Pin Descriptions
Pin Name
D8
D9
EN1
EN3
EN2
PGND
CN
VIN
CP
NC
V OUT
D1
D2
D3
D4
D5
D6
GND
D7
GND
Pin Number
1
2
3
4
5
6
7
8
9
10,19
11
12
13
14
15
16
18
17
20
EP PAD
Description
Current sink input #8. Connected to VOUT when un-used.
Current sink input #9. Connected to VOUT when un-used.
Enable Pin 1
Enable Pin 3
Enable Pin 2
Charge Pump Switch Ground
Negative Terminal of Flying Capacitor
Input Power Supply. Requires 2.2μF capacitor between this pin and ground.
Positive Terminal of Flying Capacitor
No-Connect
Charge pump output to drive load circuit. Requires 2.2μF capacitor between this pin
and ground.
Current sink input #1. Connected to V OUT when un-used.
Current sink input #2. Connected to V OUT when un-used.
Current sink input #3. Connected to V OUT when un-used.
Current sink input #4. Connected to V OUT when un-used.
Current sink input #5. Connected to V OUT when un-used.
Current sink input #6. Connected to V OUT when un-used.
Ground
Current sink input #7. Connected to V OUT when un-used.
Exposed Pad (bottom). Connected to GND directly underneath the package.
Functional Block Diagram
AL3158
Document number: DS35047 Rev. 2 - 2
2 of 10
www.diodes.com
January 2011
? Diodes Incorporated