AAT3175 Datasheet, PDF (4/12 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump For White LED Flash Applications

AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash 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
Shutdown Current
I_SINK Average Current Accuracy
I_(D-Match)
Current Matching²
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
EN/SET = 0
D1, D4 Max Setting
D2, D3 Max Setting
V_F:D1:D4 = 3.6V, D2 and D3
in Parallel
V_IN = 2.7V
V_IN = 5.5V
Min Typ Max Units
2.7
5.5
V
0.3 1.0
1.0 3.0 mA
2.0 3.7
1.0 µA
90 100 110
mA
45 50 55
0.5 5.0
%
250
mV
100
µs
1000
kHz
0.4
V
1.4
V
0.3
75
µs
50
ns
75
µs
500 µs
500 µs
-1
1
µA
1. The AAT3175 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.
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3175.2006.01.1.2