PRODUCT DATASHEET
AAT2861
TM
ChargePump
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Electrical Characteristics1
VIN = 3.6V; CIN = COUT = 2.2ꢀF; C1 = C2 = 1μF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA =
25°C.
Symbol Description
Conditions
Min Typ Max Units
VIN
IN Operating Voltage Range
2.7
5.5
V
IN Operating Current (1x mode, Main
Channels enabled, IBLX not included)
EN/SET = IN, BL1-BL7 = IN, FL_EN =
EN_LDOA = EN_LDOB/C = AGND
600
μA
IN Operating Current (2x mode, Main
Channels enabled, IBLX not included)
IN Operating Current (LDOA, LDOB and EN/SET = EN_LDOA = EN_LDOB/C = IN; FL_EN
LDOC enabled)
IN Operating Current (Only LDOA
enabled)
2X Mode; EN/SET = IN, FL_EN = EN_LDOA =
EN_LDOB/C = AGND; BL1-BL7 = OPEN
5.5
mA
μA
μA
IIN
225
= AGND; ADDR = 3; DATA = 1; No Load
EN/SET = EN_LDOA = IN; FL_EN = EN_LDOB/C
= AGND, ADDR = 3; DATA = 1; No Load
80
IIN(SHDN)
TSD
TSD(HYS)
IN Shutdown Current
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
EN/SET, FL_EN, EN_LDOA, EN_LDOB/C = AGND
1.0
μA
°C
°C
140
15
Charge Pump Section
VOUT
OUT Output Voltage
5.2
V
IOUT(MAX)
OUT Maximum Output Current
VIN = 3.0V, VOUT = 4.0
800
mA
BL1-BL7 Charge Pump Mode Transition
Hysteresis
FL1-FL2 Charge Pump Mode Transition
Hysteresis
EN/SET = IN; VIN – VF = 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
EN/SET = FL_EN = IN; VIN – VF = 1V; ADDR =
10, DATA = 1
VIN(TH_H, BL)
VIN(TH_H, FL)
0.3
1
V
V
fOSC
tCP(SS)
Charge Pump Oscillator Frequency
Charge Pump Soft-Start Time
TA = 25°C
TA = 25°C
1
100
MHz
μs
BL1-BL6, BL7/FL2, FL1 LED Drivers
EN/SET = IN; VIN – VF = 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
EN/SET = IN; VIN – VF = 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 4; ADDR = 2, DATA = 14
EN/SET = IN; VIN – VF = 1V; ADDR = 0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
IBLx
BL1-BL7 Current Accuracy
BL1-BL7 Current Accuracy
BL1-BL7 Current Matching2
18
20
2
22
mA
mA
%
IBL_x
1.6
2.4
ΔI(BLx)
IBL(AVG)
/
3
BL1-BL7 Charge Pump Transition
Threshold
EN/SET = IN; VIN – VF = 1V; ADDR=0, DATA =
16; ADDR = 3, DATA = 3; ADDR = 2, DATA = 12
VBL_(TH)
0.2
V
EN/SET = IN; VIN – VF = 1V; ADDR = 0, DATA =
16; ADDR = 1, DATA = 1; ADDR = 2, DATA =
12; ADDR = 3, DATA = 3
EN/SET = FL_EN = IN; VIN – VF = 1V; ADDR =
10, DATA = 1
EN/SET = FL_EN = IN; VIN – VF = 1V; ADDR =
10, DATA = 13
EN/SET = FL_EN = IN; VIN – VF = 1V, ADDR =
10, DATA = 1
EN/SET = FL_EN = IN; VIN – VF = 1V; ADDR =
10, DATA = 1
EN/SET = FL_EN = IN; VIN – VF = 1V; ADDR =
11, DATA = 1
BL1-BL7 Automatic Fade-In/Fade-Out
Timer
tFADE
IFL[1]
0.75
1
1.25
s
FL1 Current Accuracy
540
108
600
120
5
660
132
mA
mA
%
V
IFL[1](DATA13) FL1 Current Accuracy
ΔI(FLx)
IFL(AVG)
/
FL1-FL2 Current Matching (AAT2861-2
only)
VFL[1/2](TH) FL1 Charge Pump Transition Threshold
0.45
2
ΔtFL/tFL_SET Flash Safety Timer Period
1.5
2.5
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.
w w w . a n a l o g i c t e c h . c o m
4
2861.2009.02.1.2
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
