LTC3204-5_15 Datasheet, PDF (5/12 Pages) Linear Technology – Low Noise Regulated Charge Pump in 2 2 DFN

LTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
TYPICAL PERFOR A CE CHARACTERISTICS (LTC3204-5/LTC3204B-5 ONLY)
(T_A = 25°C, C_FLY = C_IN = C_OUT = 2.2µF unless otherwise specified)
Load Regulation
5.20
5.10
5.00
V_IN = 4.2V
4.90
V_IN = 3.6V
4.80
V_IN = 2.7V
4.70
4.60
4.50
0
100 200 300 400 500
LOAD CURRENT (mA)
3204 G16
No-Load Input Current vs
Supply Voltage
70
4.0
LTC3204-5
68
3.6
66
3.2
64
2.8
62
2.4
60
LTC3204B-5
2.0
58
1.6
56
1.2
54
0.8
52
0.4
50
2.7
0
3 3.3 3.6 3.9 4.2 4.5
SUPPLY VOLTAGE (V)
3204 G19
Output Load Capability at 4%
Below Regulation
500 _{VOUT = 4.8V}
450
400
T_A = 90°C
350
T_A = 25°C
300
250
200
T_A = – 45°C
150
100
50
0
2.7 3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
3204 G17
Extra Input Current vs Load Current
(I_IN-2I_LOAD)
10
V_IN = 3.6V
LTC3204B-5
(N0N-BURST MODE
1 ^OPERATION)
LTC3204-5
(BURST-MODE
OPERATION)
0.1
0.01
0.01
0.1
1
10 100
LOAD CURRENT (mA)
1000
3204 G20
Effective Open-Loop Output
Resistance vs Temperature
8
V_IN = 2.7V
V_OUT = 4.5V
7
6
5
4
–50
0
50
TEMPERATURE (°C)
100
3204 G18
Efficiency vs Supply Voltage
100
90
THEORETICAL MAX
80
70
60
I_OUT = 100mA
50
I_OUT = 10mA _{IOUT = 1mA}
40
30
20
10
0
2.7 3.0 3.3 3.6 3.9 4.2 4.5
SUPPLY VOLTAGE (V)
3204 G21
V_OUT Soft-Start
Output Ripple
Load Transient Response
V_OUT
2V/DIV
SHDN
5V/DIV
V_IN = 3.6V
I_OUT = 100mA
500µs/DIV
V_OUT
20mV/DIV
(AC COUPLED)
3204 G22
V_IN = 3.6V
I_OUT = 100mA
500ns/DIV
V_OUT
50mV/DIV
(AC COUPLED)
100mA
I_OUT
60mA
3204 G23
V_IN = 3.6V
10µs/DIV
I_OUT = 60mA TO 100mA STEP
3204 G24
3204fa
5