TM
MP1519 – 1X, 1.5X, 2X CHARGE PUMP 4 WHITE LED DRIVER
TYPICAL PERFORMANCE CHARACTERISTICS
Voltage Ripple
in 1.5x Mode
4 x 10mA LEDs
V
BATT
20mV/div.
V
LEDC
20mV/div.
400ns/div.
Startup in 1.5x Mode
Startup in 1x Mode
4 x 10mA LEDs
4 x 10mA LEDs
V
V
EN
EN
5V/div.
5V/div.
I
I
BATT
BATT
100mA/div.
100mA/div.
Analog Dimming
LED Current Matching
Circuit of Figure 3, V
= 3.6V
BATT
12
11
10
9
16
14
12
10
8
LED4
LED3
LED1
LED2
6
8
4
7
2
6
2.5
0
3.0
3.5
4.0
4.5
0
1
2
3
SUPPLY VOLTAGE (V)
DC VOLTAGE (V)
MP1519 Rev. 1.9
7/27/2006
www.MonolithicPower.com
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3
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