Datasheet

LTC3833
7
3833f
Error Amplifier Transconductance
vs Temperature
Current Sense Voltage
vs ITH Voltage
Maximum Current Sense Voltage
vs Temperature
RUN Thresholds vs Temperature
Input Undervoltage Lockout
Thresholds vs Temperature
RUN and TRACK/SS Pull-Up
Currents vs Temperature
t
ON(MIN)
and t
OFF(MIN)
vs Voltage on V
OUT
Pin
t
ON(MIN)
and t
OFF(MIN)
vs Voltage on V
IN
Pin
t
ON(MIN)
and t
OFF(MIN)
vs Switching Frequency
TYPICAL PERFORMANCE CHARACTERISTICS T
A
= 25°C unless otherwise noted
V
OUT
(V)
0
0
TIME (ns)
20
40
60
1
2
3 4
3833 G19
5
80
100
10
30
50
70
90
6
t
OFF(MIN)
t
ON(MIN)
V
IN
= 38V
f ≈ 2000kHz
V
IN
(V)
0
0
TIME (ns)
10
30
40
50
100
70
10
20
25
3833 G20
20
80
90
60
5 15
30
35
40
V
OUT
= 0.6V
f ≈ 2000kHz
t
OFF(MIN)
t
ON(MIN)
FREQUENCY (kHz)
200
0
TIME (ns)
20
40
60
500
800
1100 1400
3833 G21
1700
80
100
10
30
50
70
90
2000
t
OFF(MIN)
t
ON(MIN)
V
IN
= 38V
V
OUT
= 0.6V
TEMPERATURE (°C)
–50
1.50
TRANSCONDUCTANCE (mS)
1.55
1.60
1.65
1.70
0 50
100
150
3833 G22
1.75
1.80
–25 25
75
125
ITH VOLTAGE (V)
0
–60
CURRENT SENSE VOLTAGE (mV)
–40
0
20
40
1
2
2.5
120
3833 G23
–20
0.5 1.5
60
80
100
V
RNG
= 0.6V
V
RNG
= 0.9V
V
RNG
= 1.3V
V
RNG
= 1.6V
V
RNG
= 2.0V
TEMPERATURE (°C)
–50
0
MAXIMUM CURRENT SENSE VOLTAGE (mV)
20
40
60
80
0 50
100
150
3833 G24
100
120
–25 25
75
125
V
RNG
= 2V
V
RNG
= 1V
V
RNG
= 0.6V
TEMPERATURE (°C)
–50
RUN PIN THRESHOLDS (V)
0.8
1.2
150
3833 G25
0.4
0
0
50
100
–25
25
75
125
1.6
0.6
1.0
0.2
1.4
SWITCHING REGION
STANDBY REGION
SHUTDOWN REGION
TEMPERATURE (°C)
–50
3.3
UVLO THRESHOLDS (V)
3.5
3.7
3.9
4.1
0 50
100
150
3833 G26
4.3
4.5
–25 25
75
125
UVLO RELEASE
(INTV
CC
RISING)
UVLO LOCK
(INTV
CC
FALLING)
TEMPERATURE (°C)
–50
0.6
CURRENT (µA)
0.8
1.0
1.2
1.4
0 50
100
150
3833 G27
1.6
1.8
RUN
–25 25
75
125
TRACK/SS