LTC3729EG Linear Technology, LTC3729EG Datasheet - Page 7

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

Specifications of LTC3729EG

• 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: -

TYPICAL PERFORMANCE CHARACTERISTICS
35
33
31
29
27
25
–50 –25
Current Sense Pin Input Current
vs Temperature
V
OUT
= 5V
V
0
1V/DIV
2V/DIV
2V/DIV
RUNSS
TEMPERATURE (°C)
V
3.50
3.45
3.35
3.30
3.25
3.20
3.40
V
OUT
ITH
25
–50
Undervoltage Lockout
vs Temperature
Soft-Start Up (Figure 12)
–25
50
75
0
TEMPERATURE (°C)
100
100ms/DIV
25
3729
G23
125
50
75
100
10
8
6
4
2
0
–50 –25
3729
EXTV
vs Temperature
3729 G20
G26
125
CC
Switch Resistance
0
TEMPERATURE (°C)
25
50
200mV/DIV
1V/DIV
0/30A
V
75
I
V
4.5
4.0
3.5
3.0
2.5
2.0
1.0
OUT
OUT
1.5
0.5
ITH
0
–50
Shutdown Latch Thresholds
vs Temperature
100
Load Step (Figure 12)
3729
–25
G24
125
0
TEMPERATURE (°C)
THRESHOLD
LATCHOFF
25
10µs/DIV
700
400
600
500
300
200
100
0
–50
LATCH ARMING
Oscillator Frequency
vs Temperature
50
–25
75
0
100
TEMPERATURE (°C)
3729
3729 G21
V
V
25
V
G27
PLLFLTR
PLLFLTR
125
PLLFLTR
LTC3729
50
= 2.4V
= 1.2V
= 0V
75
100
3729
3729fb
7
G25
125