High Current, High Efficiency
Charge Pump with Auto-Timer
Electrical Characteristics
1
C
IN
= 4.7µF, C
OUT
= 2.2µF, C
1
= C
2
= 1.0µF; T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
T
A
= 25°C, V
IN
= 3.6V.
Symbol
Power Supply
V
IN
AAT3171
Description
Input Voltage Range
Conditions
Min
2.7
Typ
Max
5.5
Units
V
µA
mA
I
CC
Operating Current
I
SHDN(MAX)
I
OUT(MAX)
2
I
DX
T
SS
V
RSET
EN/SET
V
EN(L)
V
EN(H)
T
EN/SET LO
T
EN/SET HI
T
EN/SET HI MAX
T
OFF
T
LAT
Input Current
V
IN
Pin Shutdown Current
Maximum Output Current
Output Current Accuracy
Soft-Start Time
R
SET
Pin Voltage
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
EN/SET Input Leakage
1X, No Load Current
3.0
≤
V
IN
≤
5.5, 1.5X Mode,
No Load Current
3.0
≤
V
IN
≤
5.5, 2X Mode,
No Load Current
EN = 0
V
F
= 3.6V
Programmed for 600mA;
R
SET
= 187kΩ
300
2.0
3.0
800
540
200
0.7
660
4.0
6.0
1.0
µA
mA
mA
µs
V
V
IN
= 2.7V
V
IN
= 5.5V
0.4
1.4
0.3
50
75
500
500
1
75
-1
V
V
µs
ns
µs
µs
µs
µA
1. The AAT3171 is guaranteed to meet performance specifications from 0°C to 70°C. Specification over the -40°C to +85°C operating tem-
perature range is assured by design, characterization, and correlation with statistical process controls.
2. Mounted on an FR4 board.
4
3171.2007.03.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
