AAT3167_07 Datasheet, PDF (5/14 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

AAT3167
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.
Efficiency vs. Supply Voltage
100
5.1mA
90 _{VF = 3.0V}
80
18mA
V_F = 3.4V
70
60
50
40
30
350μA
20
V_F = 2.7V
10
0
2.5 2.8 3.0 3.3 3.5 3.8 4.0 4.3 4.5 4.8 5.0 5.3 5.5
Supply Voltage (V)
EN
(2V/div)
OUT
(2V/div)
V_SINK
(500mV/div)
I_IN
(200mA/div)
Turn-On to 1X Mode
(V_IN = 4.2V; 18mA Load)
Time (100µs/div)
EN
(2V/div)
OUT
(2V/div)
V_SINK
(500mV/div)
I_IN
(200mA/div)
Turn-On to 1.5X Mode
(V_IN = 3.5V; 18mA Load)
Time (100µs/div)
EN
(2V/div)
OUT
(2V/div)
V_SINK
(500mV/div)
I_IN
(200mA/div)
Turn-On to 2X Mode
(V_IN = 2.8V; 18mA Load)
Time (100µs/div)
EN
(2V/div)
V_F
(1V/div)
I_IN
(100mA/div)
Turn-Off from 1.5X Mode
(V_IN = 3.5V; 18mA Load)
Time (100µs/div)
Current Matching vs. Temperature
19.0
18.8
18.6
Channel 2 Channel 3
18.4
18.2
18.0
17.8
Channel 4
17.6
Channel 1
Channel 5
17.4
17.2
17.0
-40
-20
0
20
40
60
80
Temperature (°C)
3167.2007.03.1.4
5