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| AAT3122 Datasheet, PDF (4/12 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications | |||
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AAT3122
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
Input Power Supply
VIN
Operation Range
Icc
Operating Current
ISHDN
ID
Charge Pump
TSS
FCLK
Shutdown Current
Maximum Output Current
Soft-Start Time
Clock Frequency
ηCP
Charge Pump Efficiency
EN/SET
VEN(L)
VEN(H)
TLO
THI
TOFF
Input Current
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
Minimum EN/SET High Time
EN/SET Off Timeout
EN/SET Input Leakage
Conditions
Min Typ Max Units
3.0 ⤠VIN ⤠5.5, Active,
No Load Current
EN = 0
VIN = 3.5V; Code = 32
2.7
5.5
V
1.8 3.5 mA
1.0
µA
108 120 132 mA
200
µs
1000
kHz
VIN = 3.6V, IOUT(Total) = 120mA;
Measured from IN to OUT
93
%
VIN = 2.7V to 5.5V
VIN = 2.7V to 5.5V
0.5
V
1.4
V
0.3
75
µs
50
ns
500
µs
-1.0
1.0
µA
1. The AAT3122 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
3122.2005.11.1.3
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