AAT2846
High Current Charge Pump with Dual LDO
for Backlight and Flash Applications
1
Electrical Characteristics
VIN = 3.6V; CIN = 4.7µF; COUT = 2.2µF; C1 = C2 = 1µF; RFSET = 280kΩ; TA = -40°C to +85°C, unless otherwise
noted. Typical values are TA = 25°C.
Symbol Description
Conditions
Min Typ Max Units
ENS, FEN Logic Control (continued)
tENS(OFF)
tFEN(OFF)
tENS(LAT)
tFEN(LAT)
,
ENS, FEN Off Timeout
500
500
µs
µs
,
ENS, FEN Serial Interface
Latch Timeout
Linear Regulators
VFBA, VFBB Feedback Voltage Tolerance
IOUT = 1mA to 200mA
1.17 1.2
1.23
200
V
ENA = ENB = IN, ENS = AGND
ENA = IN, ENB = AGND or ENA =
AGND, ENB = IN, ENS = AGND
IIN
Ground Pin Current
µA
150
IOUTA(MAX)
IOUTB(MAX)
,
OUTA, OUTB Maximum Load
Current
200
150
50
mA
mV
dB
VOUTA(DO)
,
OUTA, OUTB Dropout Voltage
IOUT = 150mA
300
0.4
VOUTB(DO)
PSRRA,
PSRRB
OUTA, OUTB Power Supply
Rejection Ratio
ENA, ENB Voltage Low Threshold
ENA, ENB Voltage High Threshold
ENA, ENB Enable Delay
IOUT = 10mA, CREF = 10nF, 1kHz
VEN (L)
V
V
µs
_
VEN (H)
1.4
15
_
tEN (DLY)
REF = Open
_
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 ]
