LTC3728LIGN-1#PBF Linear Technology, LTC3728LIGN-1#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC3728LIGN-1#PBF
• Description: IC REG SW DUAL 2PH STPDWN 28SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3728LIGN-1#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 7 V
• Current - Output: 3A
• Frequency - Switching: 250kHz ~ 550kHz
• Voltage - Input: 4.5 ~ 35 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

200mV/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
10V/DIV
10V/DIV
2A/DIV
V
V
SW1
SW2
V
I
IN
IN
Input Source/Capacitor
Instantaneous Current (Figure 13)
V
V
V
I
OUT5
IN
OUT1
PLLFLTR
= 15V
= I
= 5V, V
OUT3.3
= 0V
OUT2
= 2A
700
600
400
300
200
500
100
= 3.3V
35
33
31
29
27
25
1μs/DIV
0
–50
–50 –25
Current Sense Pin Input Current
vs Temperature
Oscillator Frequency
vs Temperature
V
OUT
–25
= 5V
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
3728L1 G22
V
V
25
25
V
PLLFLTR
PLLFLTR
PLLFLTR
50
50
= 2.4V
= 1.2V
= 0V
20mV/DIV
0.5A/DIV
75
75
V
OUT
I
L
100
100
3728L1 G28
3728L1 G26
Burst Mode Operation (Figure 13)
V
V
V
V
I
OUT
IN
OUT
PLLFLTR
FCB
= 15V
125
125
= 20mA
= 5V
= 5V
= 0V
10μs/DIV
3.50
3.45
3.20
3.40
3.35
3.30
3.25
10
8
6
4
2
0
–50
–50 –25
EXTV
vs Temperature
Undervoltage Lockout
vs Temperature
–25
CC
3728L1 G23
Switch Resistance
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
25
20mV/DIV
25
0.5A/DIV
V
50
50
OUT
I
L
Constant Frequency (Burst Inhibit)
Operation (Figure 13)
V
V
V
V
I
OUT
75
IN
OUT
PLLFLTR
FCB
75
= 15V
= 20mA
= 5V
= 5V
100
100
3728L1 G29
= 0V
3728L1 G27
LTC3728L-1
125
125
2μs/DIV
3728L1 G24
3728l1fc
7