LT3991EMSE-5#PBF Linear Technology, LT3991EMSE-5#PBF Datasheet - Page 20

• Manufacturer Part Number: LT3991EMSE-5#PBF
• Description: IC, DC-DC CONV, 2MHz, MSOP10
• Manufacturer: Linear Technology

Specifications of LT3991EMSE-5#PBF

• Primary Input Voltage: 55V
• No. Of Outputs: 1
• Output Voltage: 5V
• Output Current: 1.2A
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +125°C
• Peak Reflow Compatible (260 C): Yes
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LT3991/LT3991-3.3/LT3991-5
TYPICAL APPLICATIONS
20
6V TO 55V
3.3V Step-Down Converter with Undervoltage Lockout, Soft-Start, and Power Good
V
IN
4.3V TO 37V
16V TO 55V
4.7µF
V
V
IN
IN
1M
5M
100k
OFF ON
OFF ON
10µF
1nF
4.7µF
1.8V Step-Down Converter
49.9k
118k
162k
f = 300kHz
f = 800kHz
f = 400kHz
12V Step-Down Converter
EN
EN
PG
SS
RT
EN
PG
SS
RT
SS
RT
SYNC
SYNC
V
SYNC
V
V
IN
IN
IN
LT3991
LT3991
LT3991
GND
GND
GND
BD
BOOST
BOOST
BOOST
SW
SW
SW
BD
PG
BD
FB
FB
FB
1M
110k
562k
0.47µF
0.47µF
10pF
0.47µF
10pF
10pF
10µH
511k
10µH
6.8µH
1M
100µF
1M
10µF
3991 TA06
3991 TA05
47µF
3991 TA06
150k
V
12V
1.2A
V
1.8V
1.2A
OUT
OUT
PGOOD
V
3.3V
1.2A
OUT
3991fa