AAT3131 Datasheet, PDF (4/14 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications

AAT3131
High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
Electrical Characteristics¹
V_IN = 3.5V, C_IN = C_OUT = C₁ = C₂ = 1.0µF; T_A = -40 to +85°C, unless otherwise noted. Typical values are T_A = 25°C.
Symbol Description
Input Power Supply
V_IN
Operation Range
I_CC
Operating Current
I_SHDN
I_DX
I_DX
I_(D-Match)
Shutdown Current
Maximum Output Current
D1 to D3
Maximum Output Current D4
Current Matching Between
Any Two Outputs
η_CP
Charge Pump Section Efficiency
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}
T_OFF
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
3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current
EN = 0
3.0 ≤ V_IN ≤ 5.5
3.0 ≤ V_IN ≤ 5.5
VD1:D3 = 3.6, V_IN = 3.3V
V_IN = 3.5V, I_OUT(TOTAL) = 90mA,
Measured from IN to OUT
V_EN/SET < 0.5
V_EN/SET > 1.4
V_EN/SET < 0.5
Min Typ Max Units
2.7
5.5
V
1.8 3.5 mA
18 20
1.0 µA
22
mA
27 30
33 mA
0.5
%
93
%
200
µs
1000
kHz
0.5
V
1.4
V
0.3
75
µs
50
ns
500 µs
-1
1
µA
1. The AAT3131 is guaranteed to meet performance specifications over the -40 to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
4
3131.2005.12.1.2