AAT3152
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Electrical Characteristics1
C
IN
= C
OUT
= C1 = C2 = 1.0µF; T
A
= -40°C - 85°C, unless otherwise noted.
Typical values are at T
A
= 25°C, V
IN
= 3.6V.
Symbol
Description
Conditions
Min
2.7
1X Mode, 3.0
≤
V
IN
≤
5.5, Active,
No Load Current
1.5X Mode, 3.0
≤
V
IN
≤
5.5, Active,
No Load Current
2X Mode, 3.0
≤
V
IN
≤
5.5, Active,
No Load Current
50µA Setting, 1X Mode
EN/SET = 0
I
SET
= 20mA, T
A
= 25°C
V
F
:D1:D4 = 3.6V
0.3
1
1.5
80
-10
150
1
10
12
Typ
Max
5.5
1
3
3
Units
V
Input Power Supply
V
IN
Operation Range
mA
I
CC
Operating Current
Shutdown Current
I
SINK
Average Current Accuracy
I
(D-Match)
Current Matching (Note 2)
V
TH
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any Current Sink Pin
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
Minimum EN/SET High Time
T
OFF
EN/SET Off Timeout
T
LAT
EN/SET Latch Timeout
EN/SET Input Leakage
I
EN/SET
I
SHDN
I
DX
µA
µA
%
%
mV
100
1000
0.4
V
EN/SET
V
EN/SET
V
EN/SET
V
EN/SET
<0.6V
>1.4V
<0.6V
>1.4V
1.4
0.3
50
500
500
1
75
µs
kHz
V
V
µs
ns
µs
µs
µA
-1
Notes:
1. The AAT3152 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 the deviation of any sink current from the average of all active channels.
4
3152.2004.12.0.9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
