AAT3134
High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
Electrical Characteristics
1
V
IN
= 3.5V, C
IN
= C
OUT
= C
1
= C
2
= 1.0µF; T
A
= -40°C to +85°C.
Unless otherwise noted, typical values are T
A
= 25°C.
Symbol
Description
Conditions
Min
2.7
3.0
≤
V
IN
≤
5.5, Active,
No Load Current
EN/SET = 0
V
IN
= 3.6, Code = 32
VD1:D4 = 3.6, V
IN
= 3.5V
VD5:VD6 = 3.6, V
IN
= 3.5V
1.8
18
20
0.5
0.5
200
1000
V
IN
= 3.5V, I
OUT(TOTAL)
= 120mA,
Measured from IN to OUT
93
0.5
V
EN/SET
< 0.5
V
EN/SET
> 1.4
V
EN/SET
< 0.5
1.4
0.3
50
-1.0
500
1.0
75
Typ
Max
5.5
3.5
1.0
22
Units
V
mA
µA
mA
%
Input Power Supply
V
IN
Operation Range
I
CC
I
SHDN
Operating Current
Shutdown Current
I
DX(MAX)
Maximum Output Current
Current Matching Between
I
(D-Match)
Any Two Outputs
Charge Pump Section
T
SS
Soft-Start Time
F
CLK
Clock Frequency
η
CP
EN/SET
V
EN(L)
V
EN(H)
T
EN/SET LO
T
EN/SET HI
T
OFF
Input Current
Charge Pump Section Efficiency
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
Minimum EN/SET High Time
EN/SET Off Timeout
EN/SET Input Leakage
µs
kHz
%
V
V
µs
ns
µs
µA
1. The AAT3134 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.
4
3134.2005.12.1.1