AAT3134
High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
Electrical Characteristics1
VIN = 3.5V, CIN = COUT = C1 = C2 = 1.0µF; TA = -40°C to +85°C.
Unless otherwise noted, typical values are TA = 25°C.
Symbol
Description
Conditions
Min Typ Max Units
Input Power Supply
VIN
Operation Range
2.7
5.5
3.5
V
3.0 ≤ VIN ≤ 5.5, Active,
No Load Current
ICC
Operating Current
1.8
mA
ISHDN
Shutdown Current
EN/SET = 0
1.0
22
µA
IDX(MAX)
Maximum Output Current
Current Matching Between
Any Two Outputs
VIN = 3.6, Code = 32
VD1:D4 = 3.6, VIN = 3.5V
VD5:VD6 = 3.6, VIN = 3.5V
18
20
0.5
0.5
mA
I(D-Match)
%
Charge Pump Section
TSS
Soft-Start Time
200
µs
FCLK
Clock Frequency
1000
kHz
V
IN = 3.5V, IOUT(TOTAL) = 120mA,
ηCP
Charge Pump Section Efficiency
93
%
Measured from IN to OUT
EN/SET
VEN(L)
VEN(H)
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
0.5
75
V
V
1.4
0.3
TEN/SET LO
TEN/SET HI
TOFF
VEN/SET < 0.5
VEN/SET > 1.4
VEN/SET < 0.5
µs
ns
µs
µA
Minimum EN/SET High Time
EN/SET Off Timeout
50
500
1.0
Input Current
EN/SET Input Leakage
-1.0
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
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
