LTC3719EG Linear Technology, LTC3719EG Datasheet - Page 5

• 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
1000
600
100
800
400
200
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
60
90
80
70
50
40
30
20
10
0
0
0.01
0
0
Supply Current vs Input Voltage
and Mode
Internal 5V LDO Line Reg
Efficiency vs Load Current
(3 Operating Modes) (Figure 12)
OPERATION
I
Burst Mode
LOAD
5
5
= 1mA
0.1
10
10
LOAD CURRENT (A)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
CONSTANT
FREQUENCY
(BURST DISABLED)
15
15
FORCED
CONTINUOUS
MODE
SHUTDOWN
ON
1
20
20
V
V
FREQ = 200kHz
25
IN
OUT
25
10
= 5V
W
= 1.55V
30
30
3719 G01
3719 G04
3719 G07
U
100
35
35
250
200
100
100
150
50
80
60
40
20
75
50
25
0
0
0
0.1
0
0
Efficiency vs Load Current
(Figure 12)
EXTV
Maximum Current Sense Threshold
vs Duty Factor
CC
20
10
Voltage Drop
LOAD CURRENT (A)
DUTY FACTOR (%)
1
CURRENT (mA)
40
20
V
V
V
V
IN
IN
IN
IN
30
60
= 5V
= 8V
= 12V
= 20V
10
V
V
FREQ = 200kHz
V
OUT
EXTVCC
FCB
40
= 0V
80
= 1.55V
= 0V
3719 G05
3719 G02
3719 G08
100
100
50
5.05
5.00
4.85
4.75
4.70
4.95
4.90
4.80
100
90
80
70
60
50
80
70
60
50
40
30
20
10
0
– 50
5
0
INTV
Voltage vs Temperature
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
Efficiency vs Input Voltage
(Figure 12)
PERCENT OF NOMINAL OUTPUT VOLTAGE (%)
I
V
OUT
OUT
– 25
= 20A
= 1.55V
CC
EXTV
and EXTV
25
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
CC
10
SWITCHOVER THRESHOLD
INTV
25
CC
50
CC
LTC3719
50
VOLTAGE
Switch
15
75
75
sn3719 3719fs
100
3719 G03
3719 G06
3719 G09
5
125
100
20