Datasheet

LT3693
5
3693f
TEMPERATURE (°C)
FEEDBACK VOLTAGE (mV)
800
3693 G12
760
840
780
820
–50 25–25 0 50 75 100 150125
Feedback Voltage
TEMPERATURE (oC)
FREQUENCY (MHz)
1.00
1.10
3693 G13
0.90
0.80
1.20
0.95
1.05
0.85
1.15
–50 25–25 0 50 75 100 150125
R
T
= 34.0k
Switching Frequency
FB PIN VOLTAGE (mV)
0
SWITCHING FREQUENCY (kHz)
800
1000
1200
600
3693 G14
600
400
200 400
800
500
100 300
700 900
200
0
R
T
= 34.0k
Frequency Foldback
TEMPERATURE (°C)
MINIMUM SWITCH ON TIME (ns)
80
100
120
3693 G15
60
40
20
0
140
–50 25–25 0 50 75 100 150125
Minimum Switch On-Time
RUN/SS PIN VOLTAGE (V)
0
SWITCH CURRENT LIMIT (A)
1.5
3693 G16
4
2
0.5 1 2
1
0
7
6
5
3
2.5 3 3.5
Soft-Start
RUN/SS PIN VOLTAGE (V)
0
RUN/SS PIN CURRENT (μA)
8
10
12
15 25
3693 G17
6
4
510
20 30 35
2
0
RUN/SS Pin Current
BOOST DIODE CURRENT (A)
0
BOOST DIODE V
F
(V)
0.8
1.0
1.2
2.0
3693 G18
0.6
0.4
0
0.5 1.0 1.5
0.2
1.4
Boost Diode
TYPICAL PERFOR A CE CHARACTERISTICS
UW
T
A
= 25°C unless otherwise noted.
FB PIN ERROR VOLTAGE (mV)
–200
–50
V
C
PIN CURRENT (μA)
–20
0
20
0 200
50
3693 G19
–40
–100 100
40
10
–10
30
–30
Error Amp Output Current
LOAD CURRENT (mA)
1
INPUT VOLTAGE (V)
3.0
3.5
1000
0
3693 G20
2.5
2.0
10 100 1000
5.0
4.5
4.0
V
OUT
= 3.3V
T
A
= 25oC
L = 4.7MH
f = 600kHz
Minimum Input Voltage
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