PRODUCT DATASHEET
AAT2861
ChargePump
TM
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Electrical Characteristics
1
V
IN
= 3.6V; C
IN
= C
OUT
= 2.2μF; C
1
= C
2
= 1μF; T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
=
25°C.
Symbol
V
IN
Description
Conditions
EN/SET = IN, BL1-BL7 = IN, FL_EN =
EN_LDOA = EN_LDOB/C = AGND
2X Mode; EN/SET = IN, FL_EN = EN_LDOA =
EN_LDOB/C = AGND; BL1-BL7 = OPEN
EN/SET = EN_LDOA = EN_LDOB/C = IN; FL_EN
= AGND; ADDR = 3; DATA = 1; No Load
EN/SET = EN_LDOA = IN; FL_EN = EN_LDOB/C
= AGND, ADDR = 3; DATA = 1; No Load
EN/SET, FL_EN, EN_LDOA, EN_LDOB/C = AGND
Min
2.7
Typ
Max
5.5
600
5.5
225
80
1.0
Units
V
μA
mA
μA
μA
μA
°C
°C
V
mA
V
V
MHz
μs
IN Operating Voltage Range
IN Operating Current (1x mode, Main
Channels enabled, IBLX not included)
IN Operating Current (2x mode, Main
Channels enabled, IBLX not included)
I
IN
IN Operating Current (LDOA, LDOB and
LDOC enabled)
IN Operating Current (Only LDOA
enabled)
IN Shutdown Current
I
IN(SHDN)
Over-Temperature Shutdown Threshold
T
SD
Over-Temperature Shutdown Hysteresis
T
SD(HYS)
Charge Pump Section
OUT Output Voltage
V
OUT
OUT Maximum Output Current
I
OUT(MAX)
BL1-BL7 Charge Pump Mode Transition
V
IN(TH_H, BL)
Hysteresis
FL1-FL2 Charge Pump Mode Transition
V
IN(TH_H, FL)
Hysteresis
Charge Pump Oscillator Frequency
f
OSC
Charge Pump Soft-Start Time
t
CP(SS)
BL1-BL6, BL7/FL2, FL1 LED Drivers
I
BLx
I
BL_x
ΔI
(BLx)
/
I
BL(AVG)
V
BL_(TH)
t
FADE
I
FL[1]
I
FL[1](DATA13)
ΔI
(FLx)
/
I
FL(AVG)
V
FL[1/2](TH)
Δt
FL
/t
FL_SET
BL1-BL7 Current Accuracy
BL1-BL7 Current Accuracy
BL1-BL7 Current Matching
2
BL1-BL7 Charge Pump Transition
Threshold
BL1-BL7 Automatic Fade-In/Fade-Out
Timer
FL1 Current Accuracy
FL1 Current Accuracy
FL1-FL2 Current Matching (AAT2861-2
only)
FL1 Charge Pump Transition Threshold
Flash Safety Timer Period
140
15
5.2
800
0.3
1
1
100
18
1.6
20
2
3
0.2
0.75
540
108
1
600
120
5
0.45
1.5
2
2.5
1.25
660
132
22
2.4
V
IN
= 3.0V, V
OUT
= 4.0
EN/SET = IN; V
IN
– V
F
= 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
EN/SET = FL_EN = IN; V
IN
– V
F
= 1V; ADDR =
10, DATA = 1
T
A
= 25°C
T
A
= 25°C
EN/SET = IN; V
IN
– V
F
= 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
EN/SET = IN; V
IN
– V
F
= 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 4; ADDR = 2, DATA = 14
EN/SET = IN; V
IN
– V
F
= 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
EN/SET = IN; V
IN
– V
F
= 1V; ADDR=0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
EN/SET = IN; V
IN
– V
F
= 1V; ADDR = 0, DATA =
16; ADDR = 1, DATA = 1; ADDR = 2, DATA =
12; ADDR = 3, DATA = 3
EN/SET = FL_EN = IN; V
IN
– V
F
= 1V; ADDR =
10, DATA = 1
EN/SET = FL_EN = IN; V
IN
– V
F
= 1V; ADDR =
10, DATA = 13
EN/SET = FL_EN = IN; V
IN
– V
F
= 1V, ADDR =
10, DATA = 1
EN/SET = FL_EN = IN; V
IN
– V
F
= 1V; ADDR =
10, DATA = 1
EN/SET = FL_EN = IN; V
IN
– V
F
= 1V; ADDR =
11, DATA = 1
mA
mA
%
V
s
mA
mA
%
V
s
1. The AAT2861 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. Current matching is defined as the deviation of any sink current from the average of all active channels.
4
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2861.2009.02.1.2
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
