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AAT2820 Datasheet, PDF (7/18 Pages) Advanced Analogic Technologies – Triple-Output Charge Pump Regulator
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AAT2820
Triple-Output Charge Pump Regulator
Typical Characteristics
VIN = 3.3V, VOUT = 5V, VPOS = 12.5V, VNEG = -7.8V, CIN = CFLY = 1µF, COUT = 4.7µF; TA = 25°C, unless otherwise noted.
Negative Charge Pump Efficiency
vs. Output Current
(No Load at VPOS and VOUT)
70
65 VIN = 2.7V
60
55
50
VIN = 3.3V
VIN = 3.0V
45
40
35
VIN = 4.2V
30
25
20
0
5
10
15
20
25
30
Output Current (mA)
Load Transient Response
(10mA - 100mA; VIN = 3.3V)
5.05
5.00
4.95
4.90
4.85
100mA
10mA
ROUT = 500Ω to 55Ω
Time (50μs/div)
0.15
0.10
0.05
0.00
-0.05
Output Ripple Waveform
(VOUT = 5V @ 100mA; VPOS = 12.5V @ 10mA;
VNEG = -7.8V @ 10mA)
VOUT
(20mV/div)
VPOS
(10mV/div)
VNEG
(10mV/div)
Time (250ns/div)
5V Output Startup Time
with 100mA Load
3V
Enable
(1V/div)
0V
VOUT
(1V/div)
+5V
0V
Time (100μs/div)
AAT2820 Power-Up Sequence
Enable
(2V/div)
VOUT
(5V/div)
VPOS
(10V/div)
VNEG
(10V/div)
4V
0V
5V
0V
10V
0V
0V
-10V
Time (250μs/div)
2820.2006.04.1.4
AAT2820-1 Power-Up Sequence
(VIN = 4.2V)
Enable
(2V/div)
VOUT
(5V/div)
VPOS
(10V/div)
VNEG
(10V/div)
4V
0V
5V
0V
10V
0V
0V
-10V
Time (250μs/div)
7
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