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PDF AAT3111IGU-36-T1 Data sheet ( Hoja de datos )

Número de pieza AAT3111IGU-36-T1
Descripción MicroPower Regulated Charge Pump
Fabricantes Advanced Analogic Technologies 
Logotipo Advanced Analogic Technologies Logotipo



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AAT3113/4
High Efficiency 1.5X Fractional Charge
Pumps For White LED Applications
General Description
The AAT3113/4 are low noise, constant frequency
charge pump DC/DC converters that use fractional
(1.5X) conversion to increase efficiency in White
LED applications. The devices can be used to pro-
duce current levels up to 20mA for each output from
a 2.7V to 5.5V input. Low external parts counts (two
1µF flying capacitors and two small bypass capaci-
tors at VIN, and OUT) make the AAT3113/4 ideally
suited for small battery-power applications.
AnalogicTech™’s Simple Serial Control™
(S2Cwire™) interface is used to enable, disable
and set the LED drive current for a 32 level loga-
rithmic scale LED brightness control. The
AAT3113/4 have a thermal management system to
protect the device in the event of a short circuit
condition on any of the output pins. Built-in soft-
start circuitry prevents excessive inrush current
during start-up. High switching frequency enables
the use of small external capacitors. A low current
shutdown feature disconnects the load from VIN
and reduces quiescent current to less than 1µA.
The AAT3113 provides 4 LED current source out-
puts, and the AAT3114 provides 6. The AAT3113/4
are available in 16-pin quad QFN packages, and
the AAT3113 is also available in the 12-pin
TSOPJW package.
Features
ChargePump
• White LED Backlighting
• AAT3113 - 4 Outputs
• AAT3114 - 6 Outputs
• 20mA Full Scale Current
• 32 Position Logarithmic Scale with Digital
Control
• Simple Serial Control™ (S2Cwire™) interface
• Low Noise Constant Frequency Operation
• 33% Less Input Current Than Doubler
Charge Pump
• High Accuracy Brightness Matching
• Small Application Circuit
• Regulated Output Current
• Automatic Soft-Start
• VIN Range: 2.7V to 5.5V
• No Inductors
• 600kHz Switching Frequency
• Iq < 1µA in Shutdown
• Temperature Range -40 to 85°C.
• 16-Pin QFN, 12-Pin TSOPJW Package
Applications
• White LED Backlighting
• Programmable Current Source
Typical Application
VBATTERY
CIN COUT
1µF 1µF
EN/SET
VIN C1+
VOUT
C1-
C2+
AAT3114
C2-
EN/SET
GND
D1
D2
D3
D4
D5
D6
C1
1µF
C2
1µF
D6 D5 D4 D3 D2 D1
3113.2004.07.1.4
1

1 page




AAT3111IGU-36-T1 pdf
AAT3113/4
High Efficiency 1.5X Fractional Charge
Pumps For White LED Applications
Typical Characteristics
(unless otherwise noted: VIN=3.5V, CIN=COUT=C1=C2=1µF, TA=25°C)
Normalized IDIODE vs. Temperature
1.020
1.010
1.000
0.990
0.980
0.970
0.960
0.950
-40 -20 0 20 40 60 80 100
Temperature (°C)
ENSET
(2V/div)
IDIODE Response
-31dB to 0dB
IDIODE
-31 dB
10 µs/div
0 dB
140
120
100
80
60
40
20
0
3.0
IDIODE vs. VIN
3.5
VIN (V)
4.0
IDIODE Response
-9dB to -10dB
ENSET
(2V/div)
IDIODE
0 dB
-10 dB
-9 dB -31 dB
4.5
10 µs/div
IDIODE vs. VDIODE
140
120
100
80
60
40
20
0
3.0 3.2 3.4 3.6 3.8 4.0
V DIODE (V)
3113.2004.07.1.4
1.000
0.975
0.950
0.925
0.900
0.875
0.850
0.825
0.800
0.775
0.750
2.5
VIH and VIL vs. VIN
VIH
VIL
3.0 3.5 4.0 4.5
VIN (V)
5.0 5.5
5

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AAT3111IGU-36-T1 arduino
Application Circuits
Typical AAT3113 Application Circuit:
AAT3113/4
High Efficiency 1.5X Fractional Charge
Pumps For White LED Applications
VBATTERY
CIN COUT
1µF 1µF
EN/SET
VIN C1+
VOUT
C1-
C2+
AAT3113
C2-
EN/SET
D1
D2
D3
D4
GND
C1
1µF
C2
1µF
D4 D3 D2 D1
THI > 50ns
300ns < TLO < 75µs
ON/1
2
3
4
5
6
Enable / Disable / LED Brightness Level Set Data Input
n
(n < =32)
50ns minimum to enable
OFF
3113.2004.07.1.4
11

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