LTC3863 Datasheet, PDF (7/36 Pages) Linear Technology – 60V Low IQ Inverting DC/DC Controller Wide Operating VIN Range: 3.5V to 60V

LTC3863
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise noted.
Free Running Frequency Over
Input Voltage
600
550
FREQ = OPEN
500
450
400
FREQ = 0V
350
300
0
10 20 30 40 50 60
V_IN (V)
3863 G19
GATE Bias LDO (V_IN - V_CAP) Load
Regulation
0.5
0.0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
0
5
10
15
20
I_GATE (mA)
3863 G22
Current Sense Voltage Over
Temperature
100
98
96
94
92
90
–75
–25 25
75 125 175
TEMPERATURE (°C)
3863 G25
Free Running Frequency Over
Temperature
600
550
FREQ = OPEN
500
450
400
FREQ = 0V
350
300
–75
–25
25
75 125 175
TEMPERATURE (°C)
3864 G20
GATE Bias LDO (V_IN - V_CAP)
Dropout Behavior
0.1
V_IN = 5V
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
0
5
10
15
20
I_GATE (mA)
3863 G23
SS Pin Pull-Up Current Over
Temperature
14
V_SS = 0V
12
10
8
6
–75 –25 25
75 125 175
TEMPERATURE (°C)
3863 G26
For more information www.linear.com/3863
Frequency Foldback % Over
Feedback Voltage
120
100
80
60
40
20
0
0
200
400
600
800
V_FB (mV)
3863 G21
Current Sense Voltage Over ITH
Voltage
100
Burst Mode OPERATION
90
PULSE-SKIPPING
80
70
60
50
40
30
20
10
0
–10
0
0.4 0.8
1.2
1.6
2
ITH VOLTAGE (V)
3863 G24
RUN Pin Pull-Up Current Over
Temperature
0.65
V_RUN = 0V
0.55
0.45
0.35
0.25
–75
–25 25
75 125 175
TEMPERATURE (°C)
3863 G27
3863f
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