Datasheet

LT1683
5
1683fd
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
Current vs Temperature
CS Pin to V
C
Pin Transfer Function
Slope Compensation
Gate Drive A/B High Voltage
vs Temperature
Gate Drive A/B Low Voltage
vs Temperature
CS Pin Trip and CS Fault Voltage
vs Temperature
SHDN Pin On and Off Thresholds
vs Temperature
SHDN Pin Hysteresis Current vs
Temperature
V
C
Pin Threshold and Clamp
Voltage vs Temperature
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
V
C
PIN VOLTAGE (V)
1683 G06
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
CS PIN VOLTAGE (mV)
1683 G07
240
220
200
180
160
140
120
100
80
FAULT
TRIP
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
SHDN PIN VOLTAGE (V)
1683 G08
1.50
1.45
1.40
1.35
1.30
1.25
ON
OFF
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
SHDN PIN CURRENT (µA)
1683 G09
27
25
23
21
19
17
15
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
V
IN
CURRENT (mA)
1683 G10
24
22
20
18
16
14
12
10
V
IN
= 12 R
CSL
, R
VSL
= 5.7k
WITH NO EXTERNAL MOSFETs
V
IN
= 20 R
CSL
, R
VSL
= 17k
V
IN
= 12 R
CSL
, R
VSL
= 17k
CS PIN VOLTAGE (mV)
0
20 40 60 80 100 120
V
C
PIN VOLTAGE (V)
1683 G11
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
T
A
= 25°C
DUTY CYCLE (%)
0
10 20 30 40 50
PERCENT OF MAX CS VOLTAGE
1683 G12
110
100
90
80
70
60
50
V
C
PIN = 0.9V
T
A
= 25°C
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
GATE DRIVE A/B PIN VOLTAGE (V)
1683 G13
10.7
10.6
10.5
10.4
10.3
10.2
10.1
10.0
9.90
9.80
9.70
6.5
6.4
6.3
6.2
6.1
6.0
5.9
5.8
5.7
5.6
5.5
GCL = 12V
GCL = 6V
V
IN
= 12V
NO LOAD
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
GATE DRIVE A/B PIN VOLTAGE (V)
1683 G14
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
V
IN
= 12V
NO LOAD