AAT2846
High Current Charge Pump with Dual LDO
for Backlight and Flash Applications
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
Min
Typ
Max
Units
ENS, FEN Logic Control (continued)
t
ENS(OFF)
,
ENS, FEN Off Timeout
t
FEN(OFF)
t
ENS(LAT)
,
ENS, FEN Serial Interface
t
FEN(LAT)
Latch Timeout
Linear Regulators
V
FBA
, V
FBB
Feedback 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
500
500
µs
µs
I
OUT
= 1mA to 200mA
ENA = ENB = IN, ENS = AGND
ENA = IN, ENB = AGND or ENA =
AGND, ENB = IN, ENS = AGND
1.17
1.2
1.23
200
150
V
µA
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 AAT2846 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
2846.2007.08.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
