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| AAT3143 Datasheet, PDF (4/11 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump with PWM Control for White LED Applications | |||
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AAT3143
High Efficiency 1X/1.5X/2X Charge Pump with
PWM Control for White LED Applications
Electrical Characteristics1
CIN = CCP = C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C,
VIN = 3.5V.
Symbol Description
Input Power Supply
VIN
Operation Range
ICC
Operating Current
ISHDN
IDX
I(D-Match)
Shutdown Current
Output Current Accuracy
Current Matching2
ηCP
Charge Pump Efficiency
Charge Pump Section
FCLK
EN/PWM
Clock Frequency
VEN(L)
VEN(H)
FPWM
tON(MIN)
Enable Threshold Low
Enable Threshold High
Maximum PWM Frequency
Minimum Pulse Width
Conditions
Min Typ Max Units
2.7
5.5
V
VD1:D4 = 2.0V, CP = 1X
No Load Current, CP = 1.5X
550
µA
3
5
EN/PWM = 0
1
µA
IOUT = 20mA, TA = 25°C, VIN = 3.5V 18
20
22
mA
VD1:D4 = 3.6V, VIN = 3.5V
-3 ±0.5 3
%
VIN = 3.5V, IOUT(TOTAL) = 80mA,
Measured from IN to CP
93
%
1000
kHz
0.4
V
1.4
V
50
kHz
2
µs
1. The AAT3143 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 I(D-Match) = (ID - IAVE)/IAVE.
4
3143.2006.05.1.0
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