LTC3729EUH#TR Linear Technology, LTC3729EUH#TR Datasheet - Page 5
LTC3729EUH#TR
Manufacturer Part Number
LTC3729EUH#TR
Description
IC BUCK SYNC ADJ 5A 32QFN
Manufacturer
Linear Technology
Series
PolyPhase®r
Type
Step-Down (Buck)r
Datasheet
1.LTC3729EGPBF.pdf
(30 pages)
Specifications of LTC3729EUH#TR
Internal Switch(s)
No
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
0.8 ~ 5 V
Current - Output
5A
Frequency - Switching
1.1MHz
Voltage - Input
4 ~ 36 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
Other names
LTC3729EUHTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
TYPICAL PERFORMANCE CHARACTERISTICS
1000
100
600
800
400
200
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
80
60
40
20
0
0
0.1
0
Efficiency vs Output Current
(Figure 12)
Supply Current vs Input Voltage
and Mode
0
Internal 5V LDO Line Reg
I
LOAD
5
5
SHUTDOWN
= 1mA
OUTPUT CURRENT (A)
10
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1
ON
15
15
V
V
V
V
IN
IN
IN
IN
20
20
= 5V
= 8V
= 12V
= 20V
10
25
25
V
V
I
f = 250kHz
OUT
OUT
EXTVCC
= 20A
= 3.3V
30
30
3729
= 5V
3729
3729
G01
G04
G07
100
35
35
100
250
200
100
150
90
80
70
60
50
50
75
50
25
0
0
1
0
Efficiency vs Output Current
(Figure 12)
EXTV
Maximum Current Sense Threshold
vs Duty Factor
0
CC
20
10
V
EXTVCC
Voltage Drop
OUTPUT CURRENT (A)
DUTY FACTOR (%)
CURRENT (mA)
V
40
= 5V
20
EXTVCC
10
= 0V
60
30
V
f = 250kHz
OUT
80
40
= 3.3V
3729
3729
3729
G02
G05
G08
100
100
50
5.05
5.00
4.85
4.75
4.70
4.95
4.90
4.80
100
90
80
70
80
70
60
50
40
30
20
10
0
–50
0
5
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
Efficiency vs Input Voltage
(Figure 12)
INTV
Voltage vs Temperature
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
–25
CC
EXTV
and EXTV
25
0
TEMPERATURE (°C)
CC
10
SWITCHOVER THRESHOLD
INTV
25
V
IN
LTC3729
50
CC
CC
(V)
50
VOLTAGE
Switch
15
75
V
V
I
f = 250kHz
OUT
OUT
EXTVCC
75
= 20A
= 3.3V
100
= 5V
3729
3729
3729 G09
3729fb
5
G03
G06
100
125
20