Six-Channel White LED Backlight
Charge Pump with Flash
Electrical Characteristics
1
V
IN
= 3.6V, C
IN
= C
OUT
= C
1
= C
2
= C
3
= 1.0μF; T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are T
A
= 25°C.
Symbol
V
IN
AAT2803
Description
Operation Range
Conditions
1X Mode, 3.0
≤
V
IN
≤
5.5, Active,
No Load Current; EN/SET = V
IN
;
EN_FL= GND
1.5X Mode, 3.0
≤
V
IN
≤
5.5, Active,
No Load Current; EN/SET = V
IN
;
EN_FL= GND
2X Mode, 3.0
≤
V
IN
≤
5.5, Active,
No Load Current; EN/SET = V
IN
;
EN_FL = GND
V
OUT_FLASH
= 5V; EN/SET = GND;
EN_FL = V
IN
50μA Setting, 1X Mode; EN/SET
= V
IN
; EN_FL = GND
EN/SET = 0
I
SET
= 30mA, T
A
= 25°C
I
SET
= 4.1mA, T
A
= 25°C
V
F
:D1:D4 = 3.6V
Min
2.7
Typ
Max Units
5.5
V
0.3
1
1.0
3.0
mA
I
CC
Operating Current
2.0
2.0
50
27
3.69
30
4.1
0.5
150
3.7
4.5
μA
1.0
33
4.51
μA
mA
%
mV
4.7
V
I
SHDN
I
DX
I
(D-Match)
V
TH
V
OUT
Shutdown Current
I
SINK
Average Current Accuracy
2
Current Matching Between Any
Two Current Sink Inputs
3, 4
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any D
X
Pin
Output Voltage (Flash Charge
Pump)
5
Max Continuous Output Current
(Flash Charge Pump)
5
Max Pulsed Output Current
5
I
OUT
T
SS
F
CLK
V
EN(L)
V
EN(H)
Soft-Start Time
Clock Frequency
Enable Threshold Low
Enable Threshold High
3.0< V
IN
< 5V, I
OUT
= 120mA;
EN_FL = V
IN
V
IN
= 3.3V; V
OUT
= 4.5V;
EN_FL = V
IN
V
IN
= 3.6V; V
OUT
= 4.5V;
I
PULSED
= 250ms
Backlight Charge Pump
Flash Charge Pump
V
IN
= 2.7V
V
IN
= 5.5V
4.3
120
4.5
mA
300
100
200
1.0
0.4
1.4
μs
MHz
V
V
1. The AAT2803 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.
2. Determined by the average of all active channels.
3. Current matching is defined as the deviation of any sink current from the average of all active channels.
4. Specification applies only to the tri-mode charge pump.
5. Specification applies only to the charge pump doubler.
4
2803.2006.12.1.6
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
