PRODUCT DATASHEET
AAT3177
ChargePump
TM
Typical Characteristics
V
IN
= 3.6V, C
IN
= 4.7μF, C
OUT
= 2.2μF, C
1
= C
2
= 1μF, T
A
= 25°C, unless otherwise noted.
High Current, High Efficiency Charge Pump with Auto-Timer
Operating Characteristic
(V
IN
= 3.3V; 1.5X Mode; I
LED
= 300mA)
V
IN
(100mV/div)
V
OUT
(200mV/div)
V
SINK
(200mV/div)
Operating Characteristic
(V
IN
= 2.9V; 2X Mode; I
LED
= 300mA)
V
IN
(100mV/div)
V
OUT
(200mV/div)
V
SINK
(200mV/div)
Time (2µs/div)
Time (2µs/div)
LED Current vs. R
SET
(Data = 1)
1000
900
800
700
1.8
1.6
Flash Timer Duration
(C
T
= 0.1µF)
-40°C
25°C
Flash Time (s)
1.4
1.2
1.0
0.8
0.6
I
LED
(mA)
600
500
400
300
200
100
0
100
200
300
400
500
600
700
800
900
1000
85°C
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
0.4
R
SET
(kΩ)
Ω
Supply Voltage (V)
EN/SET Latch Timeout vs. Supply Voltage
EN/SET Latch Timeout (µs)
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
350
EN/SET Off Timeout vs. Supply Voltage
EN/SET Off Timeout (µs)
300
250
200
150
100
50
0
25°C
-40°C
85°C
25°C
-40°C
85°C
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
Supply Voltage (V)
Supply Voltage (V)
6
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3177.2008.06.1.0
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