AAT2846_08 Datasheet, PDF (4/22 Pages) Advanced Analogic Technologies – High Current Charge Pump with Dual LDO for Backlight and Flash Applications

PRODUCT DATASHEET
AAT2846
ChargePump^TM High Current Charge Pump with Dual LDO for Backlight and Flash Applications
Electrical Characteristics¹
V_IN = 3.6V; C_IN = 4.7µF; C_OUT = 2.2µF; C₁ = C₂ = 1µF; R_FSET = 280kΩ; T_A = -40°C to +85°C, unless otherwise noted.
Typical values are T_A = 25°C.
Symbol Description
V_IN
IN Operating Voltage Range
I_IN(Q)
IN Operating Current
I_IN(SHDN) IN Shutdown Current
T_SD
Over-Temperature Shutdown Threshold
T_SD(HYS) Over-Temperature Shutdown Hysteresis
Charge Pump Section
I_OUT
OUT Maximum Output Current
V_{IN(TH_H)} Charge Pump Mode Hysteresis
f_OSC
Charge Pump Oscillator Frequency
BL1-BL6 Backlight LED Outputs
I_{BL_(MAX)} BL1-BL6 Maximum Current
∆I_{(BL_)}
BL1-BL6 Current Matching²
BL1-BL6 Charge Pump Mode Transition
Threshold
FL1-FL2 Flash LED Outputs
I_{FL_(MAX)}
∆I_{(FL_)}
V_{FL_(TH)}
FL1-FL2 Maximum Current
FL1-FL2 Current Matching²
FL1-FL2 Charge Pump Mode Transition
Threshold
ENS, FEN Logic Control
V_ENS(L) ENS, FEN Input Low Threshold
V_ENS(H) ENS, FEN Input High Threshold
I_ENS, I_FEN ENS, FEN Input Leakage Current
t_ENS(LOW) ENS, FEN Serial Interface Low Time
t , _{ENS(HI_MIN)}
t_{ENS(HI_MIN)}
ENS, FEN Serial Interface Minimum High Time
t , _{ENS(HI_MAX)}
t_{ENS(HI_MAX)}
ENS, FEN Serial Interface Maximum High Time
t_ENS(OFF),
t_FEN(OFF)
ENS, FEN Off Timeout
t_ENS(LAT),
t_FEN(LAT)
ENS, FEN Serial Interface Latch Timeout
Conditions
1X Mode, 3.0V ≤ V_IN ≤ 5.5V, Active,
No Load; ENL = AGND, FEN = ENS = IN
1.5X Mode, 3.0V ≤ V_IN ≤ 5.5V, Active,
No Load; ENL = AGND, FEN = ENS = IN
2X Mode, 3.0V ≤ V_IN ≤ 5.5V, Active,
No Load; ENL = AGND, FEN = ENS = IN
ENA = ENB = ENS = FEN = AGND
Address 0, Data 1
T_A = 25°C
Address 0, Data 1; V_IN - V_F = 1.5V
Address 12, Data 2; V_IN - V_F = 1.5V
Address 0, Data 1; V_IN - V_F = 1.5V
Address 4, Data 1; V_IN - V_F = 1.5V
Address 4, Data 1; V_IN - V_F = 1.5V
V_ENS or V_FEN = V_IN = 5V
V_IN ≥ 3.3V
V_IN ≥ 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
5.5
1
4
5
1.0
22
1.0
330
4.0
0.4
1.0
75
75
500
500
Units
V
mA
µA
°C
°C
mA
mV
MHz
mA
%
mV
mA
%
mV
V
V
µA
µs
ns
µs
µs
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 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.
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2846.2008.03.1.1