Datasheet

LTC4278
7
4278fc
TEMPERATURE (°C)
–50
8
9
25 75
4278 G12
7
6
–25 0
50 100 125
5
4
3
10
I
VCC
(mA)
DYNAMIC CURRENT C
PG
= 1nF,
C
SG
= 1nF, f
OSC
= 100kHz
STATIC PART CURRENT
V
CC
= 14V
TEMPERATURE (°C)
–50
90
SENSE VOLTAGE (mV)
92
96
98
100
110
104
0
50
75
4278 G13
94
106
108
102
–25
25
100
125
FB = 1.1V
SENSE = V
SENSE
+
WITH V
SENSE
–
= 0V
TEMPERATURE (°C)
–50
SENSE VOLTAGE (mV)
215
25
4278 G14
200
190
–25 0 50
185
180
220
210
205
195
75 100 125
SENSE = V
SENSE
+
WITH V
SENSE
–
= 0V
TEMPERATURE (°C)
–50
90
f
OSC
(kHz)
92
96
98
100
110
104
0
50
75
4278 G15
94
106
108
102
–25
25
100
125
C
OSC
= 100pF
TEMPERATURE (°C)
–50
1.230
V
FB
(V)
1.231
1.233
1.234
1.235
1.240
1.237
0
50
75
4278 G16
1.232
1.238
1.239
1.236
–25
25
100
125
TEMPERATURE (°C)
–50
FEEDBACK PIN INPUT BIAS (nA)
200
250
300
25 75
4278 G17
150
100
–25 0
50 100 125
50
0
R
CMP
OPEN
TEMPERATURE (°C)
–50
V
FB
RESET (V)
1.03
25
4278 G18
1.00
0.98
–25 0 50
0.97
0.96
1.04
1.02
1.01
0.99
75 100 125
TYPICAL PERFORMANCE CHARACTERISTICS
V
CC
Shutdown Current
vs Temperature V
CC
Current vs Temperature
SENSE Voltage vs Temperature
SENSE Fault Voltage
vs Temperature
Oscillator Frequency
vs Temperature
V
FB
vs Temperature
Feedback Pin Input Bias
vs Temperature
V
FB
Reset vs Temperature
TEMPERATURE (°C)
–50
V
CC
CURRENT (µA)
60
80
90
25 75
4278 G02
40
50
70
30
20
–25 0
50 100 125
10
0
V
CC
= 14V
V
UVLO
= 0
V
FB
(V)
0.9
–70
I
VCMP
(µA)
–50
–30
–10
70
30
1
1.1
1.4
50
10
1.2
1.3
1.5
4278 G19
125°C
25°C
–40°C
Feedback Amplifier Output
Current vs V
FB