AAT3156 Datasheet, PDF (4/14 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications

AAT3156
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Electrical Characteristics¹
C_IN = C_OUT = C1 = C2 = 1.0µF; T_A = -40°C to 85°C, unless otherwise noted.
Typical values are at T_A = 25°C, V_IN = 3.5V.
Symbol Description
Input Power Supply
V_IN
Operation Range
I_CC
Operating Current
I_SHDN
Shutdown Current
I_DX
I_SINK Current Accuracy²
I_(D-Match)
Current Matching Between Any
Two Current Sink Inputs^{3, 4}
V_TH
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any I_SINK Pin
Charge Pump Section
T_SS
F_CLK
EN/SET
Soft-Start Time
Clock Frequency
V_EN(L)
V_EN(H)
T_{EN/SET LO}
T_{EN/SET_HI_MIN}
T_{EN/SET_HI_MAX}
T_OFF
T_LAT
I_EN/SET
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
Minimum EN/SET High Time
Maximum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage
Conditions
1X Mode, 3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current
1.5X Mode, 3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current
2X Mode, 3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current
50µA Setting, 1X Mode
EN/SET = 0
I_SET = 30mA, T_A = 25°C
I_SET = 4.1mA, T_A = 25°C
V_F:D1:D4 = 3.6V
I_SET = 20mA
V_IN = 2.7V
V_IN = 5.5V
Min
2.7
27
3.69
1.4
0.3
-1
Typ
0.3
1
2.0
50
30
4.1
0.5
150
100
1000
50
Max
5.5
1
3
3.7
1
33
4.51
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 AAT3156 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. Determined by the average of all active channels.
3. Current matching is defined as the deviation of any sink current at I_OUT = 20mA and 2mA.
4. Specification applies only to the tri-mode charge pump.
4
3156.2005.06.1.1