LTC3731HG Linear Technology, LTC3731HG Datasheet - Page 5

• Manufacturer Part Number: LTC3731HG
• Description: IC REG SW SYNC 3PH STPDWN 36SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3731HG

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 6 V
• Frequency - Switching: 225kHz ~ 680kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 140°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Not Compliant

Typical perForMance characTerisTics
610
605
600
595
590
700
600
500
400
300
200
100
100
90
80
70
60
50
40
30
20
10
0
0
–50
–50
0.1
Efficiency vs I
Reference Voltage
vs Temperature
Oscillator Frequency
vs Temperature
V
V
V
V
V
FCB
FCB
PLLFLTR
PLLFLTR
PLLFLTR
–25
–25
= OPEN
= 5V
V
= 1.2V
= 0V
0
= 2.4V
0
FCB
TEMPERATURE (°C)
LOAD CURRENT (A)
TEMPERATURE (°C)
1
= 0V
25
25
OUT
V
PLLFLTR
50
50
(Figure 14)
75
75
= 5V
10
V
V
100
100
IN
OUT
= 8V
= 1.5V
125
125
3731H G07
3731H G04
3731H G01
100
150
150
700
600
500
400
300
200
100
6.0
5.5
5.0
4.0
4.5
95
90
85
80
75
70
65
60
55
50
–50
0
0
Efficiency vs V
Error Amplifier g
vs Temperature
Operating Frequency vs V
–25
0.5
5
PLLFLTR PIN VOLTAGE (V)
0
I
L
TEMPERATURE (°C)
= 45A
25
10
1
IN
V
IN
50
m
(Figure 14)
(V)
I
L
1.5
15
= 15A
75
100
V
f = 225kHz
OUT
PLLFLTR
20
2
125
= 1.5V
3731H G05
3731H G02
3731H G08
150
25
2.5
100
85
80
75
70
65
95
90
85
80
75
4
2
0
5
3
1
200
–50
–50
Efficiency vs Frequency
(Figure 14)
Maximum I
vs Temperature
Undervoltage Reset Voltage
vs Temperature
V
V
V
IN
–25
–25
IN
IN
= 5V
= 12V
= 20V
300
0
0
TEMPERATURE (°C)
V
TEMPERATURE (°C)
FREQUENCY (kHz)
O
SENSE
= 1.75V
25
25
LTC3731H
400
50
50
Threshold
V
O
= 0.6V
75
75
I
V
LOAD
500
100
100
OUT
V
= 1.5V
= 20A
IN
125
125
3731H G09
3731H G06
3731H G03
= 8V
3731Hfb

600
150
150