LTC1753 LINER [Linear Technology], LTC1753 Datasheet - Page 5

• Manufacturer Part Number: LTC1753
• Description: 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium III Processor
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
350
340
330
320
310
300
290
280
270
260
250
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
– 50
–50
Oscillator Frequency
vs Temperature
V
vs Temperature
V
f
CC
OSC
CC
–25
–25
Operating Supply Current
= 5V
= 300kHz
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
3.0
2.5
2.0
1.5
1.0
0.5
0
Output Over Current Protection
0
SHORT-CIRCUIT
50
50
Q1 CASE = 90 C, V
Q1 = 2 MTD20N03HDL
Q2 = 1 MTD20N03HDL
R
SS CAP = 0.01 F
IMAX
CURRENT
2
75
75
= 2.7k, R
4
W
OUTPUT CURRENT (A)
100
100
6
1753 G13
IFB
1753 G10
U
OUT
8
= 20 ,
125
125
= 2.8V
10
12
190
180
150
220
210
200
170
160
250
225
200
175
150
125
100
14
50
75
– 50
–50
I
vs Temperature
V
vs Temperature
16
1753 G16
MAX
CC
– 25
–25
Shutdown Supply Current
18
Sink Current
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
50
50
50mV/DIV
75
75
5A/DIV
I
LOAD
V
100
100
OUT
10
0
1753 G11
1753 G14
Transient Response, V
125
125
70
60
50
40
30
20
10
–10
–11
–12
–13
–14
–15
–16
– 8
0
– 9
50 s/DIV
0
– 50
PV
vs Gate Capacitance
Soft-Start Source Current
vs Temperature
PV
T
A
CC
CC
= 25 C
– 25
Supply Current
= 12V
2000
OUT
GATE CAPACITANCE (pF)
0
TEMPERATURE ( C)
= 2.8V
25
4000
1753 G17
LTC1753
50
6000
75
100
1753 G15
1753 G12
5
8000
125