LT3991EMSE#PBF Linear Technology, LT3991EMSE#PBF Datasheet - Page 2

• 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: -

ABSOLUTE MAXIMUM RATINGS
LT3991/LT3991-3.3/LT3991-5
(Note 1)
V
BOOST Pin Voltage ...................................................75V
BOOST Pin Above SW Pin .........................................30V
FB, V
PG, BD Voltage .........................................................30V
Boost Diode Current ....................................................1A
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LT3991EDD#PBF
LT3991IDD#PBF
LT3991EMSE#PBF
LT3991IMSE#PBF
LT3991EMSE-3.3#PBF
LT3991IMSE-3.3#PBF
LT3991EMSE-5#PBF
LT3991IMSE-5#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifications, go to:
2
LT3991
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
IN
, EN Voltage .........................................................55V
OUT
BOOST
10-LEAD (3mm × 3mm) PLASTIC DFN
, RT, SYNC, SS Voltage .................................6V
SW
V
BD
EN
IN
θ
1
2
3
4
5
JA
= 45°C, θ
DD PACKAGE
TOP VIEW
GND
11
JC
= 10°C/W
TAPE AND REEL
LT3991EDD#TRPBF
LT3991IDD#TRPBF
LT3991EMSE#TRPBF
LT3991IMSE#TRPBF
LT3991EMSE-3.3#TRPBF LTFRS
LT3991IMSE-3.3#TRPBF
LT3991EMSE-5#TRPBF
LT3991IMSE-5#TRPBF
10
9
8
7
6
SYNC
PG
RT
SS
FB
LT3991
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
http://www.linear.com/leadfree/
PART MARKING*
LFJR
LFJR
LTFJS
LTFJS
LTFRS
LTFRV
LTFRV
http://www.linear.com/tapeandreel/
BOOST
SW
V
BD
EN
IN
10-LEAD PLASTIC MSOP
θ
1
2
3
4
5
JA
= 45°C, θ
MSE PACKAGE
TOP VIEW
GND
11
JC
= 10°C/W
Operating Junction Temperature Range (Note 2)
Lead Temperature (Soldering, 10 sec)
LT3991E ............................................. –40°C to 125°C
LT3991I .............................................. –40°C to 125°C
Storage Temperature Range .............. –65°C to 150°C
(MSE Only) ....................................................... 300°C
PACKAGE DESCRIPTION
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10
9
8
7
6
SYNC
PG
RT
SS
FB
LTC991-3.3, LT3991-5
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
BOOST
SW
V
BD
EN
IN
10-LEAD PLASTIC MSOP
θ
1
2
3
4
5
JA
= 45°C, θ
MSE PACKAGE
TOP VIEW
GND
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
11
JC
= 10°C/W
10
9
8
7
6
SYNC
PG
RT
SS
V
OUT
3991fa