Datasheet

LTC3823
5
3823fd
TYPICAL PERFORMANCE CHARACTERISTICS
On-Time vs Temperature
Maximum Current Sense
Threshold vs V
RNG
Voltage
Maximum Current Sense
Threshold vs Temperature
Error Amplifi er g
m
vs Temperature
Input Current vs Input Voltage Shutdown Current vs Input Voltage
TEMPERATURE (°C)
–50
200
ON-TIME (ns)
205
215
220
225
250
235
0
50
75
3823 G04
210
240
245
230
–25
25
100
125
I
ION
= 30μA
V
ON
= 0V
V
RNG
VOLTAGE (V)
0.5
50
MAX CURRENT SENSE THRESHOLD (mV)
100
150
200
250
300
0.75
1 1.25 1.5
3823 G05
1.75 2
TEMPERATURE (°C)
–50
100
MAX CURRENT SENSE THRESHOLD (mV)
105
115
120
125
150
135
0
50
75
3823 G06
110
140
145
130
–25
25
100
125
V
RNG
= 1V
TEMPERATURE (°C)
–50
g
m
(mS)
1.7
1.8
25 75
3823 G07
1.6
–25 0
50 100 125
1.5
INPUT VOLTAGE, V
IN
(V)
0
1.0
INPUT CURRENT (mA)
1.5
2.0
2.5
5101520
3823 G08
25 30
INPUT VOLTAGE, V
IN
(V)
0
0
SHUTDOWN CURRENT (μA)
10
20
30
40
60
5
10 15 20
3823 G09
25 30
50
INTV
CC
Load Regulation
INTV
CC
LOAD CURRENT (mA)
0
ΔINTV
CC
(%)
–0.4
–0.2
0
40
3823 G10
–0.6
–0.8
–0.5
–0.3
–0.1
–0.7
–0.9
–1.0
105
2015
30 35 45
25
50
FCB Pin Current vs Temperature
TEMPERATURE (°C)
–50
–1.50
FCB PIN CURRENT (μA)
–1.45
–1.35
–1.30
–1.25
–1.00
–1.15
0
50
75
3823 G11
–1.40
–1.10
–1.05
–1.20
–25
25
100
125
Track Up
V
OUT
2V/DIV
TRACK/SS
AND V
FB
500mV/DIV
250ms/DIV
3823 G12
TRACK/SS
FIGURE 12 CIRCUIT
V
FB
V
OUT