AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Electrical Characteristics
V
IN
= 3.3V, V
OUT
= 5.0V, C
IN
= C
OUT
= 10 µF, C1 = C2 = 1.0µF; T
A
= -40°C to 85°C, unless otherwise noted.
Typical values are T
A
= 25°C.
Symbol
Description
Conditions
Min
Typ Max Units
AAT3112-4.5
Input Power Supply
V
IN
Operation Range
I
Q
Quiescent Current
I
SHDN
Shutdown Current
I
OUT
V
OUT
2.7
2
Pulsed Output Current
Output Voltage
2.7
≤
V
IN
≤
4.5, I
OUT
= 0 mA; EN1 = EN2 = V
IN
EN1 = EN2 = 0
V
IN
= 3.6V; V
OUT
= 4.0V; T
PULSE
= 50mS
V
IN
= 3.6V; V
OUT
=4.0V; T
PULSE
= 500mS
2.7
≤
V
IN
≤
4.5, I
OUT
= 100mA
3.0
≤
V
IN
≤
4.5, I
OUT
= 200mA
26
590
500
4.5
4.5
750
80
4.5
60
1.0
V
µA
µA
mA
4.32
4.32
4.68
4.68
V
Charge Pump Section
F
CLK
Clock Frequency
η
CP
Charge Pump Efficiency
EN
V
EN(L)
Enable Threshold Low
V
EN(H)
Enable Threshold High
I
EN
EN Input Leakage
AAT3112-5.0
Input Power Supply
V
IN
Operation Range
I
Q
Quiescent Current
2
I
SHDN
Shutdown Current
Pulsed Output Current
I
OUT
V
OUT
Charge Pump
F
CLK
η
CP
EN
V
EN(L)
V
EN(H)
I
EN
Output Voltage
Section
Clock Frequency
Charge Pump Efficiency
Enable Threshold Low
Enable Threshold High
EN Input Leakage
V
IN
= 2.7V; I
OUT
= 100mA
KHz
%
0.3
V
V
µA
1.4
-1.0
1.0
2.7
2.7
≤
V
IN
≤
5.0, I
OUT
= 0 mA; EN1 = EN2 = V
IN
EN1 = EN2 = 0
V
IN
= 3.6V; V
OUT
= 4.5V; T
PULSE
= 50mS
V
IN
= 3.6V; V
OUT
=4.5V; T
PULSE
= 500mS
2.7
≤
V
IN
≤
5.0, I
OUT
= 100mA
3.0
≤
V
IN
≤
5.0, I
OUT
= 200mA
26
600
500
5.0
5.0
750
85
5.0
60
1.0
V
µA
µA
mA
4.8
4.8
5.2
5.2
V
V
IN
= 2.7V; I
OUT
= 100mA
KHz
%
0.3
V
V
µA
1.4
-1.0
1.0
Notes:
1. The AAT3112 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. V
OUT1
and V
OUT2
are pulled high to prevent switching.
4
3112.2004.12.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
