AAT3190
Positive/Negative Charge Pump for Voltage Bias
Typical Characteristics
Positive Output Efficiency vs. Load Current
(V
IN
= 5.0V)
80
70
Negative Output Efficiency vs. Load Current
(V
IN
= 5.0V)
80
70
V
POS
= 12.3V
85°C
25°C
Efficiency (%)
85°C
25°C
Efficiency (%)
60
50
40
30
20
0
10
20
30
40
60
50
40
30
20
0
10
20
30
40
V
NEG
= -7.3V
I
POS
(mA)
I
NEG
(mA)
V
POS
Load Transient
250
200
20
10
0
-10
-20
-30
-40
-50
-60
250
200
V
NEG
Load Transient
20
10
0
-10
-20
-30
-40
-50
-60
150
100
50
0
-50
-100
-150
V
NEG
(bottom trace)
(50mV/div)
V
POS
(bottom trace)
(50mV/div)
150
100
50
0
-50
-100
-150
I
POS
(top trace)
(10mA/div)
I
NEG
(top trace)
(10mA/div)
50µs/div
µ
50µs/div
µ
AAT 3190 Power-Up Sequence
20
16
AAT3190-1 Power-Up Sequence
4
2
20
16
4
Enable
Enable
2
0
V
POS
and V
NEG
(bottom traces, V)
V
POS
and V
NEG
(bottom traces, V)
12
8
4
0
-4
-8
-12
0
12
8
4
0
-4
-8
-12
Enable
(top trace, V)
Enable
(top trace, V)
V
POS
V
NEG
-2
-4
-6
-8
-10
-12
V
POS
-2
-4
-6
V
NEG
-8
-10
-12
500µsec/div
µ
500µsec/div
µ
6
3190.2005.03.1.0