Four-Channel Backlight Driver with Dual LDOs
Electrical Characteristics
1
C
IN
= C
O1
= C
O2
= 2.2µF, C
1
= C
2
= 1.0µF, C
BP
= 0.1µF; T
A
= 25°C, unless otherwise noted. Typical values are
at T
A
= 25°C and V
IN
= 3.6V.
Symbol
LDOs
I
IN
IN Operating Current
ENLDO = IN, EN/SET = AGND,
No Load
I
OUT
= 1mA to 200mA
I
OUT
= 150mA
80
1.17
1.2
150
0.09
50
0.4
1.4
150
1.23
300
µA
V
mV
%/V
dB
V
V
AAT2845
Description
Conditions
Min
Typ
Max Units
V
FB
Feedback Voltage
V
DO
Dropout Voltage
ΔV
OUT
/
Line Regulation
V
IN
= (V
OUT
+ 1V) to 5.0V
V
OUT
*ΔV
IN
PSRR
Power Supply Rejection Ratio
I
OUT
=10mA, 1kHz
LDO Logic Control
EN/SET, ENLDO Pins Logic
V
IL
Low Threshold
EN/SET, ENLDO Pins Logic High
V
IH
Threshold
1. The AAT2845 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.
2845.2006.12.1.0
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
