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| LTC3203_15 Datasheet, PDF (5/16 Pages) Linear Technology – 500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps | |||
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LTC3203/LTC3203-1
LTC3203B/LTC3203B-1
TYPICAL PERFOR A CE CHARACTERISTICS
No-Load Input Current vs Supply
Voltage (LTC3203/LTC3203-1)
160
140
2x MODE
120
1.5x MODE
100
80
60
40
20
0
2.5 3 3.5 4 4.5 5 5.5
VIN (V)
3203 G10
Input and Output Ripple
(1.5x Mode)
Burst Mode Current Threshold
vs Supply Voltage
(LTC3203/LTC3203-1)
500
450
400
350
300
250
200
150
1.5x MODE
100
50
2x MODE
0
2.5 3 3.5 4 4.5 5 5.5
VIN (V)
3203 G11
Input and Output Ripple
(2x Mode)
Extra Input Current vs Load
Current (LTC3203/LTC3203-1)
100
10
2x MODE
IIN â 2 ⢠ILOAD
1
1.5x MODE
IIN â 1.5 ⢠ILOAD
0.1
0.01
0.01 0.1
1
10
ILOAD (mA)
100 1000
3209 G12
Load Transient (1.5x Mode)
VIN
20mV/DIV
AC-COUPLED
VOUT
20mV/DIV
AC-COUPLED
VIN
20mV/DIV
AC-COUPLED
VOUT
20mV/DIV
AC-COUPLED
VOUT
100mV/DIV
AC-COUPLED
500mA
IOUT 100mA
VIN = 4V
CIN = 2.2µF
COUT = 10µF
IOUT = 300mA
1.5x MODE
500ns/DIV
3203 G13
Load Transient (2x Mode)
VOUT
100mV/DIV
AC-COUPLED
IOUT 500mA
100mA
VIN = 3.6V
CIN = 2.2µF
COUT = 10µF
2x MODE
20µs/DIV
3203 G16
VIN = 3.6V
CIN = 2.2µF
COUT = 10µF
IOUT = 300mA
2x MODE
500ns/DIV
3203 G14
VFB Set Point vs Supply Voltage
(LTC3203/LTC3203B)
0.94
0.93
0.92
TA = â40°C
0.91
0.90
TA = 25°C
TA = 85°C
0.89
0.88
2.5 3 3.5 4 4.5
VIN (V)
5 5.5
3203 G17
VIN = 4V
CIN = 2.2µF
COUT = 10µF
1.5x MODE
20µs/DIV
3203 G15
VFB vs Load Current
(LTC3203/LTC3202B)
0.96
0.94
0.92
VIN = 4V
0.90
1.5x MODE
0.88
VIN = 3.6V
2x MODE
0.86
0.84
0.82
0 50 100 150 200 250 300 350 400 450 500
ILOAD (mA)
3203 G18
32031fa
5
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