LTC3729EG#TR Linear Technology, LTC3729EG#TR Datasheet - Page 5

• Manufacturer Part Number: LTC3729EG#TR
• Description: IC SW REG SYNC STEP-DOWN 28-SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3729EG#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: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LTC3729EGTR

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