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| AAT2801 Datasheet, PDF (4/20 Pages) Advanced Analogic Technologies – Multi-Mode Charge Pump for White LED Backlight and Flash Applications | |||
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AAT2801
Multi-Mode Charge Pump for
White LED Backlight and Flash Applications
Electrical Characteristics1
CIN = CCP = CF = C1 = C2 = C3 = 1.0µF; TA = -40°C to 85°C, unless otherwise noted.
Symbol Description
Input Power Supply
VIN
Operation Range
ICC
Operating Current
ISHDN
IDX
Shutdown Current
Output Current Accuracy2
I(D-Match)
Current Matching3
VOUT
Flash Charge Pump Output
Voltage
IOUT
Maximum Continuous IOUT
Maximum Pulsed IOUT
ηCP
White LED Charge Pump
Section Efficiency
Charge Pump Section
TSS
Soft-Start Time
FCLK
EN/SET
VEN(L)
VEN(H)
TEN/SET LO
TEN/SET HI MIN
TEN/SET HI MAX
TOFF
TLAT
IEN/SET/EN_FLSH
Clock Frequency
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
Minimum EN/SET High Time
Maximum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
Input Leakage
Conditions
3.0 ⤠VIN ⤠5.5, No Load Current; VOUT_FLSH
= 5V, EN/SET = GND, EN_FLSH = VIN
3.0 ⤠VIN ⤠5.5, EN/SET = VIN, EN_FLSH =
GND, VD1:VD4 = 2.0V, CP = 1X
3.0 ⤠VIN ⤠5.5, No Load Current; EN/SET =
VIN, EN_FLSH = GND, CP = 1.5X
EN_FLSH = EN/SET = 0
VIN = 3.5, Code = 32, TA = 25°C
VD1:D4 = 3.6, VIN = 3.5V; LED Charge
Pump Only
3.0V < VIN < 5V, IOUT = 120mA;
EN_FLSH = VIN
VIN = 3.6V; VOUT = 4.5V; EN_FLSH = VIN
VIN = 3.6V; VOUT = 4.5V; IPulsed < 500mS
VIN = 3.5V, IOUT(TOTAL) = 120mA,
Measured from IN to CP
Backlight Charge Pump
Flash Charge Pump
VEN/SET < 0.6V
VEN/SET > 1.4V
VEN/SET > 1.4V
VEN/SET < 0.6V
VEN/SET > 1.4V
VEN/SET/EN_FLSH = 5V, VIN = 5V
Min
2.7
-
-
-
-10
-3.0
4.3
120
250
-
1.4
0.3
-
-
-
-1.0
Typ
3.0
0.55
3.0
±0.5
4.5
93
50
200
1.0
50
Max
5.5
4.5
5.0
1.0
10
3.0
4.7
-
-
0.4
-
75
75
500
500
1.0
Units
V
mA
µA
%
%
V
mA
%
µs
MHz
V
V
µs
µs
µs
µs
µs
µA
1. The AAT2801 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. Codes 2 through 7 are guaranteed to be within ±15% of stated current level.
3. Current matching is defined as I(D-Match) = (ID - IAVE)/IAVE.
4
2801.2006.04.1.3
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