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| AAT3157 Datasheet, PDF (4/11 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications | |||
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AAT3157
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
Input Power Supply
VIN
Operation Range
ICC
Operating Current
ISHDN
Shutdown Current
IDX
ISINK Average Current Accuracy
I(D-Match)
Current Matching2
VTH
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any ISINK Pin
Charge Pump Section
TSS
FCLK
EN/SET
Soft-Start Time
Clock Frequency
VEN(L)
Enable Threshold Low
VEN(H)
Enable Threshold High
TEN/SET LO EN/SET Low Time
TEN/SET_HI_MIN Minimum EN/SET High Time
TEN/SET_HI_MAX Maximum EN/SET High Time
TOFF
EN/SET Off Timeout
TLAT
EN/SET Latch Timeout
IEN/SET
EN/SET Input Leakage
1X Mode, 3.0 ⤠VIN ⤠5.5, Active,
No Load Current
1.5X Mode, 3.0 ⤠VIN ⤠5.5, Active,
No Load Current
2X Mode, 3.0 ⤠VIN ⤠5.5, Active,
No Load Current
50µA Setting, 1X Mode
VEN/SET = 0V
ISET = 20mA, TA = 25°C
VF:D1:D3 = 3.6V
VIN = 2.7V
VIN = 5.5V
Min
2.7
18
1.4
0.3
-1
Typ
0.3
1
1
50
20
0.5
150
100
1000
50
Max
5.5
1
3
1
22
1
0.4
75
75
500
500
1
Units
V
mA
µA
µA
mA
%
mV
µs
kHz
V
V
µs
ns
µs
µs
µs
µA
1. The AAT3157 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 from the average of all active channels.
4
3157.2006.05.1.2
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