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AAT2846 Datasheet, PDF (5/25 Pages) Advanced Analogic Technologies – High Current Charge Pump with Dual LDO for Backlight and Flash Applications
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AAT2846
High Current Charge Pump with Dual LDO
for Backlight and Flash Applications
Electrical Characteristics1, 2
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
VIN
IN Operating Voltage Range
IIN(Q)
IN Operating Current
IIN(SHDN)
TSD
IN Shutdown Current
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
TSD(HYS) Hysteresis
Charge Pump Section
IOUT
VIN(TH_H)
fOSC
OUT Maximum Output Current
Charge Pump Mode Hysteresis
Charge Pump Oscillator
Frequency
BL1-BL6 Backlight LED Outputs
IBL_(MAX) BL1-BL6 Maximum Current
ΔI(BL_)
VBL_(TH)
BL1-BL6 Current Matching2
BL1-BL6 Charge Pump Mode
Transition Threshold
FL1-FL2 Flash LED Outputs
IFL_(MAX)
ΔI(FL_)
VFL_(TH)
FL1-FL2 Maximum Current
FL1-FL2 Current Matching2
FL1-FL2 Charge Pump Mode
Transition Threshold
ENS, FEN Logic Control
VENS(L)
VENS(H)
IENS, IFEN
tENS(LOW)
ENS, FEN Input Low Threshold
ENS, FEN Input High Threshold
ENS, FEN Input Leakage Current
ENS, FEN Serial Interface
Low Time
tENS(HI_MIN),
tENS(HI_MIN)
tENS(HI_MAX),
tENS(HI_MAX)
ENS, FEN Serial Interface
Minimum High Time
ENS, FEN Serial Interface
Maximum High Time
1X Mode, 3.0V ≤ VIN ≤ 5.5V, Active,
No Load; ENL = AGND, FEN = ENS = IN
1.5X Mode, 3.0V ≤ VIN ≤ 5.5V, Active,
No Load; ENL = AGND, FEN = ENS = IN
2X Mode, 3.0V ≤ VIN ≤ 5.5V, Active,
No Load; ENL = AGND, FEN = ENS = IN
ENA = ENB = ENS = FEN = AGND
Address 0, Data 1
TA = 25°C
Address 0, Data 1; VIN - VF = 1.5V
Address 12, Data 2; VIN - VF = 1.5V
Address 0, Data 1; VIN - VF = 1.5V
Address 4, Data 1; VIN - VF = 1.5V
Address 4, Data 1; VIN - VF = 1.5V
VENS or VFEN = VIN = 5V
VIN ≥ 3.3V
VIN ≥ 3.3V
Min
2.7
18
270
1.4
-1.0
0.3
Typ
140
15
600
500
2
20
30
150
300
300
50
Max Units
5.5 V
1
4 mA
5
1.0 µA
°C
°C
mA
mV
MHz
22 mA
1.0 %
mV
330 mA
4.0 %
mV
0.4 V
V
1.0 µA
75 µs
ns
75 µs
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.
2. Current matching is defined as the deviation of any sink current from the average of all active channels.
2846.2007.08.1.0
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