lt1339 Linear Technology Corporation, lt1339 Datasheet - Page 5

• Manufacturer Part Number: lt1339
• Description: High Power Synchronous Dc/dc Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
160
140
120
100
80
60
40
20
0
9
8
7
6
1000
–50
Bottom Gate Transition Times vs
Bottom Gate Capacitance
Soft Start Charge Current
vs Temperature
T
RISE TIME
A
–25
= 25 C
BOTTOM GATE CAPACITANCE (pF)
2500
0
TEMPERATURE ( C)
FALL TIME
25
5000
30
28
26
24
22
20
18
16
14
10
12V
Supply Voltage
50
f
T
O
A
= 100kHz
IN
= 25 C
75
7500
Supply Current vs
11
12V
W
100
IN
1339 G10
SUPPLY VOLTAGE (V)
1339 G13
C
C
C
C
BG
12
BG
BG
BG
10000
U
125
= 10000pF
= 4700pF
= 3300pF
= 1000pF
13
1.26
1.25
1.24
1.23
1.22
1.21
1.20
300
250
200
150
100
50
0
1000
14
–50
RUN/SHDN Rising Threshold
vs Temperature
Top Gate Transition Times vs
Top Gate Capacitance
1339 G16
T
A
–25
= 25 C
15
RISE TIME
TOP GATE CAPACITANCE (pF)
FALL TIME
2500
0
TEMPERATURE ( C)
25
5000
50
75
7500
18
16
14
12
10
8
6
4
2
100
Boost Supply Current vs
12V
10
1339 G11
1339 G14
f
T
O
A
10000
IN
125
= 100kHz
= 25 C
C
C
TG
TG
Supply Voltage
11
12V
= 4700pF
= 1000pF
IN
SUPPLY VOLTAGE (V)
12
160
150
140
130
120
110
100
90
80
26
25
24
23
22
21
20
–50
Average Current Limit Threshold
Sense Voltage Tolerance vs
Common Mode Voltage
0
RUN/SHDN Threshold Hysteresis
vs Temperature
FULL OPERATING
TEMPERATURE RANGE
13
–25
C
C
1
TG
TG
= 10000pF
= 3300pF
14
0
2
TEMPERATURE ( C)
V
1339 G17
SENSE(CM)
25
3
15
LOWER LIMIT
UPPER LIMIT
50
TYPICAL
4
(V)
LT1339
75
5
sn1339 1339fas
100
1339 G12
1339 G15
5
125
60