AAT3123/23A/24
High Efficiency 1X/1.5X Fractional Charge
Pump for White LED Applications
Electrical Characteristics1
CIN = COUT = C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C,
VIN = 3.5V.
Symbol
Description
Conditions
Min
Typ Max Units
Input Power Supply
VIN
Icc
Operation Range
2.7
5.5
3.5
V
Operating Current
3.0 ≤ VIN ≤ 5.5, Active,
No Load Current
1.8
mA
ISHDN(MAX)
IDX
Shutdown Current
Output Current
EN = 0
1
µA
VIN = 3.5V, Code = 32, TA = 25°C
VD1:D4 = 3.6V, VIN = 3.5V
VD5:VD6 = 3.6V, VIN = 3.5V
18
20
0.5
0.5
93
22
mA
I(D-Match)
Current Matching Between Any
Two Outputs
%
%
ηCP
Charge Pump Section Efficiency VIN = 3.5V, IOUT(TOTAL) = 120mA,
Measured from IN to OUT
Charge Pump Section
TSS
FCLK
Soft-Start Time
200
µs
Clock Frequency
1000
kHz
EN/SET
VEN(L)
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
VIN = 2.7V to 5.5V
VIN = 2.7V to 5.5V
0.5
75
V
V
VEN(H)
1.4
0.3
TEN/SET LO
TEN/SET HI
TOFF
µs
ns
µs
µA
Minumum EN/SET High Time
EN/SET Off Timeout
50
500
1
Input Current EN/SET Input Leakage
-1
1. The AAT3123/4 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
3123.2005.12.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
