AAT2806
Dual High Efficiency Charge Pump
for White LED and Flash Applications
Electrical Characteristics1
VIN = 3.6V; CIN = COUT = C1 = C2 = C3 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted.
Typical values are TA = 25°C.
Symbol Description
Conditions
Min Typ Max Units
Input Power Supply
VIN
Operation Range
2.7
5.5
1
V
1X Mode, 3.0 ≤ VIN ≤ 5.5, Active, No Load
Current; EN_FLSH = GND, EN/SET = VIN
1.5X Mode, 3.0 ≤ VIN ≤ 5.5, Active, No Load
Current; EN_FLSH = GND, EN/SET = VIN
2X Mode, 3.0 ≤ VIN ≤ 5.5, Active, No Load
Current; EN_FLSH = GND, EN/SET = VIN
EN_FLSH = GND, 50µA Output Setting,
1X Mode
0.3
1.0
2.0
50
3.0
3.7
mA
ICC
Operating Current
µA
3.0 ≤ VIN ≤ 5.5, No Load Current;
EN_FLSH = VIN, EN/SET = GND
2.0
4.5
mA
ISHDN
IDX
Shutdown Current
Input Current Accuracy2, 3
EN_FLSH = EN/SET = 0
1.0
10
µA
%
ISET = 20mA and ISET = 4.1mA; TA = 25°C
-10
I(D-Match)
Current Matching Between Any VD1:D4 = 3.6V, VIN = 3.5V
Two Current Sink Inputs2, 4
Sink Switch Impedance (each)2
0.5
7
%
RSINK
Ω
3.0V < VIN < 5V, IOUT = 100mA;
4.32 4.5 4.68
Flash Charge Pump Output
Voltage5
EN_FLSH = VIN
VOUT_FL
V
3.0V < VIN < 5V, IOUT = 150mA;
EN_FLSH = VIN
4.3 4.5
4.7
5
Maximum Continuous IOUT
VIN = 3.6V; VOUT = 4.5V; EN_FLSH = VIN
VIN = 3.6V; VOUT = 4.5V; IPULSED < 500ms
120
250
100
1.0
IOUT_FL
mA
5
Maximum Pulsed IOUT
TSS
Soft-Start Time
µs
MHz
V
FCLK
Clock Frequency
VEN(L)
VEN(H)
Enable Threshold Low
Enable Threshold High
0.4
75
1.4
0.3
50
V
TEN/SET LO EN/SET Low Time
TEN/SET Minimum EN/SET High Time
µs
ns
µs
µs
µs
µA
_
_
HI MIN
TEN/SET
Maximum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
Enable and EN/SET Input
Leakage
75
_
_
HI MAX
TOFF
TLAT
II
500
500
1.0
-1.0
1. The AAT2806 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. Specification applies only to the tri-mode charge pump.
3. Determined by the average of all active channels.
4. Current matching is defined as the deviation of any sink current from the average of all active channels.
5. Specification applies only to the charge pump doubler.
4
2806.2006.04.1.8
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
