LTC3261_15 Datasheet, PDF (5/14 Pages) Linear Technology – High Voltage, Low Quiescent Current Inverting Charge Pump

LTC3261
Typical Performance Characteristics
(T_A = 25°C, C_FLY = 1µF, C_IN = C_OUT = 10µF unless otherwise noted)
Voltage Loss (V_IN – |V_OUT|)
vs Output Current
(Constant Frequency Mode)
3.0
f_OSC = 50kHz
f_OSC = 200kHz
2.5
f_OSC = 500kHz
V_IN = 12V
2.0
Effective Open-Loop Resistance
vs Supply Voltage
90
80
70
f_OSC = 200kHz
60
V_OUT Load Transient Burst Mode
Operation (MODE = H)
V_OUT
500mV/DIV
AC-COUPLED
50
1.5
f_OSC = 500kHz
40
–5mA
I_OUT
–50mA
1.0
30
0.5
0.0
0.1
1
10
OUTPUT CURRENT (mA)
100
3261 G09
20
10
0
0 5 10 15 20 25 30 35
SUPPLY VOLTAGE (V)
3261 G10
V_IN = 12V
f_OSC = 500kHz
2ms/DIV
3261 G11
V_OUT Transient
(MODE = Low to High)
V_OUT
500mV/DIV
AC-COUPLED
MODE
Average Input Current
vs Output Current
100
MODE = L
10
MODE = H
1
V_OUT Ripple
V_OUT
10mV/DIV
AC-COUPLED
V_OUT
200mV/DIV
AC-COUPLED
MODE = L
MODE = H
V_IN = 12V
f_OSC = 500kHz
I_OUT = –5mA
2ms/DIV
3261 G12
0.1
0.1
V_IN = 12V
f_OSC = 500kHz
1
10
100
OUTPUT CURRENT (mA)
3261 G13
V_IN = 15V
f_OSC = 500kHz
I_OUT = 5mA
100µs/DIV
3261 G14
For more information www.linear.com/3261
3261fb
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