ltc3728legn-1-tr Linear Technology Corporation, ltc3728legn-1-tr Datasheet - Page 7

• Manufacturer Part Number: ltc3728legn-1-tr
• Description: Dual, 550khz, 2-phase Synchronous Regulator
• Manufacturer: Linear Technology Corporation

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