LT3991EMSE#PBF Linear Technology, LT3991EMSE#PBF Datasheet - Page 4

• Manufacturer Part Number: LT3991EMSE#PBF
• Description: IC BUCK SYNC ADJ 1.2A 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT3991EMSE#PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.19 ~ 30 V
• Current - Output: 1.2A
• Frequency - Switching: 200kHz ~ 2MHz
• Voltage - Input: 4.3 ~ 55 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 30V
• Output Current: 1.2A
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

LT3991/LT3991-3.3/LT3991-5
TYPICAL PERFORMANCE CHARACTERISTICS
4
1.205
1.200
1.195
1.190
1.185
1.180
1.175
100
90
80
70
60
50
40
30
90
80
70
60
50
40
30
20
10
0
0.01
–55
0
Efficiency, V
Efficiency, V
LT3991 Feedback Voltage
V
R1 = 1M
R2 = 309k
OUT
–25
= 5V
0.2
0.1
V
V
LOAD CURRENT (mA)
5
IN
LOAD CURRENT (A)
TEMPERATURE (°C)
IN
0.4
= 48V
= 36V
OUT
OUT
V
1
IN
35
V
IN
= 24V
0.6
V
V
V
V
= 5V
= 3.3V
IN
IN
= 12V
IN
IN
65
= 12V
= 24V
= 36V
= 48V
10
0.8
95
100
1
125
3991 G01
3991 G04
3991 G07
1000
155
1.2
3.345
3.330
3.255
3.315
3.300
3.285
3.270
100
90
80
70
60
50
40
30
20
10
1
–55
–50
0
Efficiency, V
No Load Supply Current
LT3991-3.3 Output Voltage
DIODES, INC.
DFLS2100
–25
–25
0.2
5
5
LOAD CURRENT (A)
TEMPERATURE (°C)
TEMPERATURE (°C)
0.4
V
OUT
IN
V
IN
35
= 48V
35
= 36V
= 3.3V
0.6
V
IN
65
65
= 24V
0.8
V
95
95
IN
= 12V
125
125
1
T
3991 G28
3991 G05
3991 G02
A
155
155
= 25°C, unless otherwise noted.
1.2
5.06
5.04
4.98
4.94
5.02
5.00
4.96
100
1.5
1.0
3.0
2.5
2.0
90
80
70
60
50
40
30
20
10
0
0.01
–50
5
LT3991-5 Output Voltage
Efficiency, V
No Load Supply Current
V
R1 = 1M
R2 = 309k
OUTPUT IN REGULATION
OUT
10
–25
= 5V
V
0.1
15
IN
= 48V
LOAD CURRENT (mA)
20
5
INPUT VOLTAGE (V)
TEMPERATURE (°C)
OUT
25 30
1
35
LT3991-3.3
V
LT3991-5
V
= 5V
IN
IN
= 36V
65
= 12V
10
35
40
95
V
100
45
IN
125
= 24V
50
3991 G03
3991 G06
3991 G29
3991fa
1000
155
55