AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
Typical Characteristics
C
IN
= C
OUT
= C
1
= C
2
= 1µF, T
A
= 25°C, V
IN
= 3.5V, unless otherwise noted.
Line Response
(1.5X Mode; 150mA Load)
4.2V
3.7V
3.6V
Load Characteristics
(V
IN
= 3.5V; 1.5X Mode; 150mA Load)
V
IN
(500mV/div)
V
OUT
(500mV/div)
V
SINK
(500mV/div)
I
LED
(10mA/div)
Time (1ms/div)
V
IN
(100mV/div)
V
OUT
(100mV/div)
V
SINK
(100mV/div)
Time (500ns/div)
Load Characteristics
(V
IN
= 3.0V; 2X Mode; 150mA Load)
30
Input Ripple vs. Input Voltage
(150mA Load)
Input Ripple (mV)
V
IN
(100mV/div)
V
OUT
(100mV/div)
25
20
15
10
5
0
V
SINK
(100mV/div)
2.5
2.8
3.0
3.3
3.5
3.8
4.0
4.3
4.5
Time (500ns/div)
Input Voltage (V)
EN/SET Latch Timeout vs. Input Voltage
EN/SET Latch Timeout (µs)
µ
350
400
EN/SET Off Timeout vs. Input Voltage
EN/SET Off Timeout (µs)
µ
300
250
200
150
100
50
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
350
300
250
200
150
100
50
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
-40°C
-40°C
25°C
85°C
25°C
85°C
Input Voltage (V)
Input Voltage (V)
6
3175.2006.01.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
