AAT2856
High Current Charge Pump with
Dual LDO for BacklightApplications
Electrical Characteristics
1
V
IN
= 3.6V; C
IN
= 4.7µF; C
OUT
= 2.2µF; C
1
= C
2
= 1µF; R
FSET
= 280kΩ; T
A
= -40°C to +85°C, unless otherwise
noted. Typical values are T
A
= 25°C.
Symbol
Description
Conditions
I
OUT
= 1mA to 200mA
ENA = ENB = IN, ENS = AGND
ENA = IN, ENB = AGND or ENA =
AGND, ENB = IN, ENS = AGND
Min
1.17
Typ
1.2
Max
1.23
200
150
Units
V
µA
Linear Regulators
V
FBA
, V
FBB
Output Voltage Tolerance
I
IN
I
OUTA(MAX)
,
I
OUTB(MAX)
V
OUTA(DO)
,
V
OUTB(DO)
PSRR
A
,
PSRR
B
V
EN_(L)
V
EN_(H)
t
EN_(DLY)
Ground Pin Current
OUTA, OUTB Maximum Load
Current
OUTA, OUTB Dropout Voltage
OUTA, OUTB Power Supply
Rejection Ratio
ENA, ENB Voltage Low Threshold
ENA, ENB Voltage High Threshold
ENA, ENB Enable Delay
200
I
OUT
= 150mA
I
OUT
= 10mA, C
REF
= 10nF, 1kHz
1.4
REF = Open
15
150
50
0.4
300
mA
mV
dB
V
V
µs
1. The AAT2856 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
6
2856.2007.06.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
