High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Electrical Characteristics
Symbol
Description
1
AAT3141
C
IN
=C
CP
=C1=C2= 1.0µF; T
A
= -40 - 85°C unless otherwise noted. Typical values are at T
A
= 25°C, V
IN
= 3.5V.
Conditions
Min Typ Max Units
2.7
VD1:D4 = 2.0V, CP = 1X
No Load Current, CP = 1.5X
V
IN
= 3.5V, EN/SET=0
V
IN
= 3.5V, T
A
= 25°C
VD1:D4 = 3.6V, V
IN
= 3.5V
V
IN
= 3.5V, I
OUT(TOTAL)
= 120mA,
Measured from IN to CP
550
3
-10
-3 ±0.5
93
5.5
5
1
10
3
V
µA
mA
µA
%
%
%
Input Power Supply
V
IN
Operation Range
I
cc
I
SHDN
I
DX
I
(D-Match)
η
CP
Operating Current
Shutdown Current
Output Current Accuracy
2
Current Matching
3
Charge Pump Section Efficiency
Charge Pump Section
T
SS
Soft start time
F
CLK
Clock Frequency
EN/SET
V
EN(L)
Enable Threshold Low
V
EN(H)
Enable Threshold High
T
EN/SET LO
EN/SET low time
T
EN/SET HI MIN
Minimum EN/SET high time
T
EN/SET HI MAX
Maximum EN/SET high time
T
OFF
EN/SET Off Timeout
T
LAT
EN/SET Latch Timeout
I
EN/SET
EN/SET input leakage
50
1
V
IN
= 2.7V
V
IN
= 5.5V
0.4
1.4
0.3
50
75
500
500
1
75
µs
MHz
V
V
µs
ns
µs
µs
µs
µA
V
EN/SET
= 5.5V, V
IN
= 5.5V
-1
Notes:
1. The AAT3141 is guaranteed to meet performance specification over the -40°C to 85°C operating temperature range and are assured
by design, characterization and correlation with statistical process controls.
2. Codes 2-7 are guaranteed to be within +/-15% of stated current level.
3. Current matching is defined as I
(D-Match)
= (I
D
- I
AVE
)/I
AVE
4
3141.2004.07.0.91
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
