AAT3151B_08 Datasheet, PDF (4/13 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X Charge Pump For White LED Applications

ChargePump^TM
PRODUCT DATASHEET
AAT3151B
High Efficiency 1X/1.5X 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 T_A = 25°C, V_IN = 3.5V.
Symbol Description
Input Power Supply
V_IN
Operation Range
I_CC
Operating Current
I_SHDN
I_DX
I_(D-Match)
Shutdown Current
I_SINK Current Accuracy²
Current Matching Between Any
Two Current Sink Inputs^{3, 4}
V_TH
1X to 1.5X Transition Threshold
at Any I_SINK Pin
Charge Pump Section
T_SS
F_CLK
EN/SET
Soft-Start Time
Clock Frequency
V_IL
V_IH
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 Timeout⁵
EN/SET Latch Timeout⁶
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
50μA Setting, 1X Mode
EN/SET = 0
I_SET = 30mA, T_A = 25°C
V_F:D1:D4 = 3.6V
I_SET = 20mA
V_IN = 2.7V
V_IN = 5.5V
Min Typ Max
2.7
5.5
0.3
1
1
3
50
1
27 30 33
0.5
150
100
1000
0.4
1.4
0.3
75
50
75
500
500
-1
1
Units
V
mA
μA
μA
mA
%
mV
μs
kHz
V
V
μs
ns
μs
μs
μs
μA
1. The AAT3151B is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and cor-
relation 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 IOUT = 20mA and 2mA.
4. Specification applies only to the tri-mode charge pump.
5. The EN/SET pin must remain logic low (less than VIL) for the duration of longer than 500μs to guarantee the off timeout.
6. The EN/SET pin must remain logic high (greater than VIH) for the duration of longer than 500μs to guarantee the latch timeout.
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3151B.2008.02.1.1