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AAT3141 Datasheet(PDF) 4 Page - Advanced Analog Technology, Inc.

Part # AAT3141
Description  High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
PDF  16 Pages
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Manufacturer  AAT [Advanced Analog Technology, Inc.]
Direct Link  http://www.aatech.com.tw
Logo AAT - Advanced Analog Technology, Inc.

AAT3141 Datasheet(HTML) 4 Page - Advanced Analog Technology, Inc.

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AAT3141
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
4
3141.2007.03.1.3
Electrical Characteristics
1
C
IN = CCP = C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C,
V
IN = 3.5V.
Symbol
Description
Conditions
Min Typ Max
Units
Input Power Supply
V
IN
Operation Range
2.7
5.5
V
I
cc
Operating Current
VD1:D4 = 2.0V, CP = 1X
550
µA
No Load Current, CP = 1.5X
3
5
mA
I
SHDN
Shutdown Current
V
IN = 3.5V, EN/SET = 0
1
µA
I
DX
Output Current Accuracy
2
V
IN = 3.5V, TA = 25°C
-10
10
%
V
IN = 3.5V, TA = 25°C, Code 28
17.1
19
20
mA
I
(D-Match)
Current Matching
3
VD1:D4 = 3.6V, V
IN = 3.5V
-3
±0.5
3
%
η
CP
Charge Pump Section Efficiency
V
IN = 3.5V, IOUT(TOTAL) = 120mA,
93
%
Measured from IN to CP
Charge Pump Section
T
SS
Soft-Start Time
50
µs
F
CLK
Clock Frequency
1
MHz
EN/SET
V
EN(L)
Enable Threshold Low
V
IN = 2.7V
0.4
V
V
EN(H)
Enable Threshold High
V
IN = 5.5V
1.4
V
T
EN/SET LO
EN/SET Low Time
0.3
75
µs
T
EN/SET HI MIN
Minimum EN/SET High Time
50
ns
T
EN/SET HI MAX
Maximum EN/SET High Time
75
µs
T
OFF
EN/SET Off Timeout
500
µs
T
LAT
EN/SET Latch Timeout
500
µs
I
EN/SET
EN/SET Input Leakage
V
EN/SET = 5.5V, VIN = 5.5V
-1
1
µA
1. The AAT3141 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.



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