AAT2856
High Current Charge Pump with
Dual LDO for BacklightApplications
Typical Characteristics
BENS, FENS High Threshold Voltage
vs. Input Voltage
1.4
1.3
1.4
1.3
BENS, FENS Low Threshold Voltage
vs. Input Voltage
V
BENS(L)
, V
FENS(L)
(V)
V
BENS(H)
, V
FENS(H)
(V)
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
2.7
3.1
3.5
3.9
-40°C
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-40°C
25°C
85°C
4.3
4.7
5.1
5.5
25°C
2.7
3.1
3.5
3.9
85°C
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
BENS, FENS Latch Timeout vs. Input Voltage
260
BENS, FENS Off Timeout vs. Input Voltage
300
T
BENS(LAT)
, T
FENS(LAT)
(µs)
240
220
200
180
160
140
120
100
80
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
100
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
25°C
-40°C
25°C
V
BENS(H)
, V
FENS(H)
(V)
260
-40°C
220
25°C
85°C
180
140
Input Voltage (V)
Input Voltage (V)
LDOs A and B Turn On Characteristic
Output Voltage Error (%)
1.0
LDOs A and B Load Regulation
V
EN
(2V/div)
0.5
0V
OUTA
0.0
V
OUT
(500mV/div)
OUTB
-0.5
0V
-1.0
0.1
1
10
100
1000
Time (50µs/div)
Load Current (mA)
8
2856.2007.06.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
