LTC3719EG Linear Technology, LTC3719EG Datasheet - Page 7

• Manufacturer Part Number: LTC3719EG
• Description: IC SW REG SYNC STEP-DOWN 36-SSOP
• Manufacturer: Linear Technology

Specifications of LTC3719EG

• Applications: Controller, AMD Opteron™
• Voltage - Input: 4 ~ 36 V
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 1.55 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TYPICAL PERFOR A CE CHARACTERISTICS
50mV/DIV
V
10A/DIV
OUT(AC)
–10
–12
–11
I
–9
–8
–7
LOAD
–50 –25
Current Sense Pin Input Current
vs Temperature
V
OUT
Load Step (Figure 12)
V
IN
= 1.55V
= 12V, V
0
TEMPERATURE ( C)
OUT
25
= 1.25V
3.50
3.45
3.30
3.20
200 s/DIV
3.40
3.35
3.25
–50
50
Undervoltage Lockout
vs Temperature
–25
75
W
100
0
TEMPERATURE ( C)
3719 G20
U
3719 G19
125
25
50
50mV/DIV
V
75
OUT(AC)
5A/DIV
5A/DIV
10
6
8
4
2
0
–50 –25
I
I
L1
L2
EXTV
vs Temperature
100
Burst Mode Operation (Figure 12)
V
3719 G23
FCB = OPEN
IN
= 12V, V
CC
125
Switch Resistance
0
TEMPERATURE ( C)
OUT
25
= 1.55V, I
10 s/DIV
50
LOAD
75
= 3A
R5, R7 = 2m
3.0
2.5
2.0
1.0
4.5
4.0
3.5
1.5
0.5
0
100
–50
V
Thresholds vs Temperature
3719 G21
RUN/SS
3719 G25
125
–25
Shutdown Latch
0
TEMPERATURE ( C)
50mV/DIV
V
OUT(AC)
5A/DIV
5A/DIV
THRESHOLD
350
200
300
250
150
100
LATCHOFF
25
50
0
– 50
I
I
L1
L2
Oscillator Frequency
vs Temperature
LATCH ARMING
Constant Frequency Mode
(Figure 12)
50
V
FCB = INTV
– 25
IN
= 12V, V
75
0
TEMPERATURE ( C)
CC
OUT
100
3719 G24
V
= 1.55V, I
25
V
PLLFLTR
PLLFLTR
10 s/DIV
125
LTC3719
50
LOAD
= 2.4V
= 0V
75
= 3A
R5, R7 = 2m
sn3719 3719fs
100
3719 G22
7
3719 G26
125