AAT3152
High Efficiency 1X/1.5X/2X 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 = 3.6V.
Symbol
Description
Conditions
Min Typ Max Units
Input Power Supply
VIN Operation Range
2.7
5.5
1
V
1X Mode, 3.0 ≤ VIN ≤ 5.5, Active,
No Load Current
0.3
1
1.5X Mode, 3.0 ≤ VIN ≤ 5.5, Active,
No Load Current
3
3
mA
ICC
Operating Current
2X Mode, 3.0 ≤ VIN ≤ 5.5, Active,
No Load Current
1.5
50
50µA Setting, 1X Mode
EN/SET = 0
µA
µA
%
ISHDN
IDX
Shutdown Current
1
ISINK Average Current Accuracy
Current Matching Between Any
Two Current Sink Inputs2, 3
ISET = 20mA, TA = 25°C
VF:D1:D4 = 3.6V
-10
10
I(D-Match)
0.5
%
VTH
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any Current Sink Pin
150
mV
Charge Pump Section
TSS
FCLK
Soft-Start Time
100
µs
Clock Frequency
1000
kHz
EN/SET
VEN(L)
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
0.4
75
V
V
VEN(H)
1.4
0.3
TEN/SET LO
TEN/SET
µs
ns
µs
µs
µs
µA
Minimum EN/SET High Time
Maximum EN/SET High Time
EN/SET Off Timeout
50
_
_
HI MIN
TEN/SET
75
500
500
1
_
_
HI MAX
TOFF
TLAT
EN/SET Latch Timeout
EN/SET Input Leakage
IEN/SET
-1
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 at IOUT = 20mA and 2mA.
3. Specification applies only to the tri-mode charge pump.
4
3152.2005.08.1.2
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
