LT3991EMSE#TRPBF
SearchBuck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Lifecycle: Active Supply Risk Score and Supply Risk Trend are available on Pro and Enterprise. Watchlist (Pro)
Datasheets:Datasheet (Arrow USA)
Country of origin: MYRoHS Compliant MSL MSL 1
Farnell(1/5)
Supply Risk Summary
Supply chain risk trend is available on Pro and Enterprise plans.
Multi-source
Active
Sign in to view detailed supply risk factors and indicators.
View PlansConfirmed Stock
9,781
Availability is incomplete; unknown stock and unidentified marketplace inventory are excluded.
3 of 9 suppliers stocked
Best Unit Price
—
Availability
3of 9 suppliers
Shortest factory lead: 19 weeks
Stock by Supplier
Stock & Availability
| Supplier | Supplier Part Number | Stock | Delivery | Factory Lead | MOQ | Packaging | Status |
|---|---|---|---|---|---|---|---|
 | 7,100 | — | — | Minimum order quantity 6 | Reel package | In Stock | |
  | LT3991EMSE#TRPBF(TAPE/REEL) | 2,454 | — — | 19 weeks — | Minimum order quantity 1 Minimum order quantity 2,500Order multiple 2,500 | — | In Stock |
 | 227 | — | — | Minimum order quantity 1Order multiple 2,500 | Tape & Reel (TR) | In Stock | |
 | 0 | — | 19 weeks | Minimum order quantity 1Order multiple 2,500 | Cut Tape (CT) | No Stock | |
| 0 | — | 19 weeks | Minimum order quantity 1Order multiple 2,500 | Digi-Reel® | No Stock | |
| 0 | — | 19 weeks | Minimum order quantity 2,500Order multiple 2,500 | Tape & Reel (TR) | No Stock | |
 | 0 | 147 days | — | Minimum order quantity 1 | — | No Stock | |
| 0 | 147 days | — | Minimum order quantity 10 | — | No Stock | |
 | 0 | — | 23 weeks | Minimum order quantity 1Order multiple 2,500 | Reel, Cut Tape, MouseReel | No Stock |
Supplier Part Details
| Supplier | Description | RoHS | MSL | Life Cycle | SVHC | Category | Country | Weight | Tariff Code | Packaging | Links |
|---|---|---|---|---|---|---|---|---|---|---|---|
Digi-Key LT3991EMSE#TRPBFCT-ND | Buck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad | — | MSL 1 | Active | — | Integrated Circuits (ICs) | — | — | 8542.39.0070 (US HTS) | Cut Tape (CT) | |
Digi-Key LT3991EMSE#TRPBFTR-ND | Buck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad | — | MSL 1 | Active | — | Integrated Circuits (ICs) | — | — | 8542.39.0070 (US HTS) | Tape & Reel (TR) | |
Digi-Key LT3991EMSE#TRPBFDKR-ND | Buck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad | — | MSL 1 | Active | — | Integrated Circuits (ICs) | — | — | 8542.39.0070 (US HTS) | Digi-Reel® | |
Farnell 4024952RL | ANALOG DEVICES - LT3991EMSE#TRPBF - DC/DC-Abwärts-Schaltregler (Buck), einstellbar, 4.3 bis 55Vin, 1.19V bis 30V/1.2Aout, MSOP-EP-10 | Yes | — | Active | No SVHC (04-Feb-2026) | — | MY | — | 85423990 (EU CN) | — | |
Farnell 4024952 | ANALOG DEVICES - LT3991EMSE#TRPBF - DC/DC-Abwärts-Schaltregler (Buck), einstellbar, 4.3 bis 55Vin, 1.19V bis 30V/1.2Aout, MSOP-EP-10 | Yes | — | Active | No SVHC (04-Feb-2026) | — | MY | — | 85423990 (EU CN) | — | |
Arrow USA LT3991EMSE#TRPBF | Conv DC-DC 4.3V to 55V Synchronous Step Down Single-Out 1.19V to 30V 1.2A 10-Pin MSOP EP T/R | Yes | — | Active | — | DC to DC Converter and Switching Regulator Chip | — | — | — | — | |
Mouser 584-LT3991EMSE#TRPBF | Switching Voltage Regulators 55V, 1.2A Buck Reg w/ 2.8 A Q C | Yes | — | — | — | Switching Voltage Regulators | — | 0.000337 g | 8542391010 | Reel, Cut Tape, MouseReel | |
Winsource LT3991EMSE#TRPBF | IC REG BUCK ADJ 1.2A 10MSOP / Conv DC-DC 4.3V to 55V Synchronous Step Down Single-Out 1.19V to 30V 1.2A Automotive 10-Pin MSOP EP T/R | Yes | — | — | — | — | — | — | — | Reel package | |
LCSC C671879 | 200kHz~2MHz Step-down type Adjustable 1.19V~30V 1.2A MSOP-10-EP Voltage Regulators - DC DC Switching Regulators RoHS | Yes | — | — | — | DC-DC Converters | — | 0.00009 g | — | Tape & Reel (TR) | |
MyArrow LT3991EMSE#TRPBF | Conv DC-DC 4.3V to 55V Synchronous Step Down Single-Out 1.19V to 30V 1.2A Automotive 10-Pin MSOP EP T/R | Yes | — | Active | — | B | — | — | — | TAPE/REEL |
Technical Attributes
Anzahl der Ausgänge1Ausgänge
Anzahl der Pins10Pin(s)
AusgangEinstellbar
Ausgangsspannung, max.30V
Ausgangsspannung, min.1.19V
Ausgangsspannung, nom.-
Ausgangsstrom1.2A
Ausgangsstrom, max.1.2A
Bauform - DC/DC-Wandler-ICMSOP-EP
Betriebstemperatur, max.125°C
Betriebstemperatur, min.-40°C
Eingangsspannung, max.55V
Eingangsspannung, min.4.3V
euEccnNLR
hazardousfalse
IC-Gehäuse / BauformMSOP-EP
IC-MontageOberflächenmontage
isCanonicalN
MSLMSL 1 - unbegrenzt
productTraceabilityYes-Date/Lot Code
Produktpalette-
Qualifikation-
Qualifizierungsstandard der Automobilindustrie-
rohsPhthalatesCompliantYES
Schaltfrequenz2MHz
Schaltfrequenz, typ.2MHz
TopologieBuck (Abwärts)
usEccnEAR99
Wirkungsgrad-