AAT3157 Datasheet, PDF (6/11 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications

AAT3157
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Typical Characteristics
C_IN = C_OUT = C₁ = C₂ = 1.0µF; T_A = 25°C, V_IN = 3.6V, unless otherwise noted.
Input Ripple vs. Input Voltage
14.0
12.0
20mA/ch
10.0
14mA/ch
8.0
6.0
4.0 _10mA/ch
2.0
0.0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
Input Voltage (V)
V_IN
(500mV/div)
V_OUT
(100mV/div)
I_LED
(10mA/div)
Line Response
(20mA/ch Load)
4.0V
3.6V
Time (1ms/div)
Load Characteristics
(V_IN = 3.7V; 1.5X Mode; 20mA/ch Load)
V_IN
(20mV/div)
V_OUT
(50mV/div)
I_LED
(10mA/div)
Time (500ns/div)
Load Characteristics
(V_IN = 2.7V; 2X Mode; 20mA/ch Load)
V_IN
(20mV/div)
V_OUT
(50mV/div)
I_LED
(10mA/div)
Time (500ns/div)
Load Characteristics
(V_IN = 3.3V; 1.5X Mode; 10mA/ch Load)
V_IN
(20mV/div)
V_OUT
(50mV/div)
I_LED
(10mA/div)
Time (500ns/div)
6
EN/SET Latch Timeout vs. Input Voltage
350
300
250
-40°C
200
150
100
25°C
85°C
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
Input Voltage (V)
3157.2006.05.1.2