Skip to main content

Texas Instruments LM51 Discrete Semiconductors Series

4 variants · Texas Instruments

About the Texas Instruments LM51 Discrete Semiconductors Series

The Texas Instruments LM51 Discrete Semiconductors Series series groups 4 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common I/O channels of 1, mounting of Surface Mount and output configuration of Positive. Variants differ by case, frequency and function, so you can match the exact case your application requires using the selection guide below. All listed Texas Instruments LM51 Discrete Semiconductors Series part numbers are active and orderable.

Select a variant by

Case
16-WFQFN Exposed Pad · 24-WFQFN Exposed Pad · 28-PowerTSSOP (0.173\", 4.40mm Width)
Frequency
100kHz ~ 2.2MHz · 100kHz ~ 600kHz · 200kHz, 480kHz
Function
Step-Down · Step-Up, Step-Up/Step-Down · Step-Up/Step-Down
Operating temperature
-40°C ~ 125°C (TA) · -40°C ~ 125°C (TJ) · -40°C ~ 150°C (TJ)
Output type
Adjustable · Transistor Driver
Synchronous rectifier
No · Yes
Topology
Boost, Flyback, SEPIC · Buck · Buck-Boost
Clock sync
No · Yes

Shared specifications

I/O channels
1
Mounting
Surface Mount
Output configuration
Positive
Package
Tape & Reel (TR); Cut Tape (CT)

Variant comparison

ParameterLM5117QPSQE/NOPBLM5157QRTERQ1LM5158QRTERQ1LM5175PWPT
Case24-WFQFN Exposed Pad16-WFQFN Exposed Pad16-WFQFN Exposed Pad28-PowerTSSOP (0.173\", 4.40mm Width)
Frequency200kHz, 480kHz100kHz ~ 2.2MHz100kHz ~ 2.2MHz100kHz ~ 600kHz
FunctionStep-DownStep-Up, Step-Up/Step-DownStep-Up, Step-Up/Step-DownStep-Up/Step-Down
Operating temperature-40°C ~ 125°C (TJ)-40°C ~ 150°C (TJ)-40°C ~ 125°C (TA)-40°C ~ 125°C (TJ)
Output typeTransistor DriverAdjustableAdjustableTransistor Driver
Synchronous rectifierYesYesNoYes
TopologyBuckBoost, Flyback, SEPICBoost, Flyback, SEPICBuck-Boost
Clock syncNoYes

Request a quote on any Texas Instruments LM51 Discrete Semiconductors Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

All variants