Specifications
| Type | Description |
|---|---|
| Part Number | LM5180 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | 8-pin WSON (NGU) with wettable flanks, 4.00 mm x 4.00 mm body, 0.8 mm pin pitch |
| Input Voltage Range | 4.5-65 V; recommended operating conditions |
| Startup Input Voltage | 4.5 V minimum; device start-up |
| Post-Startup Operating Input Voltage | down to 3.5 V; after start-up |
| Integrated Power MOSFET Voltage Rating | 100 V; internal N-channel power MOSFET |
| Integrated Power MOSFET Current Rating | 1.5 A; internal power MOSFET |
| MOSFET On-State Resistance | 0.4 ohm typ; ISW=100 mA |
| Output Power | up to 7 W; with integrated 100-V power MOSFET |
| Output Regulation Accuracy | +/-1.5%; total output regulation / load and line regulation |
| Operating Junction Temperature | -40 to 150 °C; recommended operating conditions |
| Storage Temperature | -55 to 150 °C; absolute maximum ratings |
| VIN to GND Absolute Maximum | -0.3 to 70 V; absolute maximum ratings |
| EN/UVLO to GND Absolute Maximum | -0.3 to 70 V; absolute maximum ratings |
| TC to GND Absolute Maximum | -0.3 to 6 V; absolute maximum ratings |
| SS/BIAS to GND Absolute Maximum | -0.3 to 14 V; absolute maximum ratings |
| FB to GND Absolute Maximum | -0.3 to 70.3 V; absolute maximum ratings |
| FB to VIN Absolute Maximum | -0.3 to 0.3 V; absolute maximum ratings |
| RSET to GND Absolute Maximum | -0.3 to 3 V; absolute maximum ratings |
| SW to GND Absolute Maximum | -1.5 to 100 V; absolute maximum ratings |
| SW to GND Transient Absolute Maximum | -3 V; 20-ns transient |
| Recommended SW Voltage | 95 V max; recommended operating conditions |
| Recommended EN/UVLO Voltage | 65 V max; recommended operating conditions |
| Recommended SS/BIAS Voltage | 13 V max; recommended operating conditions |
| Shutdown Current | 3 µA typ; VEN/UVLO=0 V |
| VIN Active Current | 260 µA typ, 350 µA max; VEN/UVLO=2.5 V, VRSET=1.8 V |
| VIN Current With BIAS Connected | 25 µA typ, 40 µA max; VSS/BIAS=6 V |
| Shutdown Threshold Falling | 0.3 V typ; VEN/UVLO falling |
| Standby Threshold Rising | 0.8 V min, 1 V typ; VEN/UVLO rising |
| Enable Threshold Rising | 1.45 V min, 1.5 V typ, 1.53 V max; VEN/UVLO rising |
| Enable Voltage Hysteresis | 0.04 V min, 0.05 V typ; VEN/UVLO falling |
| Enable Current Hysteresis | 4.2 µA min, 5 µA typ, 5.5 µA max; VEN/UVLO=1.6 V |
| RSET Current | 100 µA typ; RRSET=12.1 kOhm |
| RSET Regulation Voltage | 1.191 V min, 1.21 V typ, 1.224 V max; RRSET=12.1 kOhm |
| FB to VIN Voltage 1 | -40 mV typ; IFB=80 µA |
| FB to VIN Voltage 2 | 40 mV typ; IFB=120 µA |
| Minimum Switching Frequency | 12 kHz typ; switching frequency limit |
| Maximum Switching Frequency | 350 kHz typ; switching frequency limit |
| Minimum Switch On-Time | 140 ns typ; switching operation |
| TC Voltage | 1.2 V min, 1.27 V typ; ITC=+/-10 µA, TJ=25°C |
| External Soft-Start Capacitor Charging Current | 5 µA typ; SS/BIAS soft-start capacitor charging |
| Internal Soft-Start Time | 6 ms typ; SS/BIAS left open |
| BIAS Enable Voltage | 5.5 V min, 5.75 V typ; VSS/BIAS rising |
| BIAS UVLO Hysteresis | 190 mV typ; VSS/BIAS falling |
| Peak Current Limit Threshold | 1.23 A min, 1.5 A typ, 1.73 A max; power switch peak current limit |
| Thermal Shutdown Threshold | 175 °C typ; TJ rising |
| Thermal Shutdown Hysteresis | 6 °C typ; thermal shutdown recovery |
| HBM ESD Rating | +/-2000 V; ANSI/ESDA/JEDEC JS-001, all pins; classification level 2 |
| CDM ESD Rating | +/-500 V; JEDEC JESD22-C101, all pins; classification level C4B |
| Junction-to-Ambient Thermal Resistance | 41.3 °C/W; NGU WSON, 8 pins |
| Junction-to-Case Top Thermal Resistance | 34.7 °C/W; NGU WSON, 8 pins |
| Junction-to-Board Thermal Resistance | 19.1 °C/W; NGU WSON, 8 pins |
| Junction-to-Top Characterization Parameter | 0.3 °C/W; NGU WSON, 8 pins |
| Junction-to-Board Characterization Parameter | 19.2 °C/W; NGU WSON, 8 pins |
| Junction-to-Case Bottom Thermal Resistance | 3.2 °C/W; NGU WSON, 8 pins |
| Control Method | Primary-side regulated flyback; output voltage sampled from primary-side flyback voltage; no optocoupler, voltage reference, or third transformer winding required |
| Conduction Mode | Boundary conduction mode with quasi-resonant MOSFET turn-off; flyback converter operation |
| Datasheet Status | request_only |
Product Overview
The LM5180 is a Texas Instruments Power_Management IC for primary-side regulated flyback DC/DC conversion. Its control method samples output voltage from the primary-side flyback voltage, so the extracted facts state that no optocoupler, voltage reference, or third transformer winding is required. The converter operates in boundary conduction mode with quasi-resonant MOSFET turn-off.
Electrical operation is defined by a 4.5-65 V recommended input range, 4.5 V minimum start-up input voltage, and post-startup operation down to 3.5 V. The integrated internal N-channel power MOSFET is rated for 100 V and 1.5 A, with 0.4 ohm typical on-state resistance at ISW=100 mA. Output power is specified up to 7 W, and total output regulation is listed at +/-1.5%.
The device is packaged in an 8-pin WSON (NGU) with wettable flanks, 4.00 mm x 4.00 mm body size, and 0.8 mm pin pitch. Recommended junction temperature operation is -40 to 150 °C, with thermal shutdown at 175 °C typical and 6 °C typical hysteresis.
Key Features
- 4.5-65 V recommended input voltage range
- Starts at 4.5 V minimum input voltage
- Operates down to 3.5 V after start-up
- Integrated 100 V, 1.5 A N-channel MOSFET
- 0.4 ohm typical MOSFET on-state resistance
- Supports output power up to 7 W
- +/-1.5% total output regulation accuracy
- Primary-side regulation without optocoupler or reference
- Boundary conduction mode with quasi-resonant MOSFET turn-off
- 12 kHz to 350 kHz typical switching frequency limits
- Internal 6 ms typical soft-start option
- 175 °C typical thermal shutdown threshold
Typical Applications
- Primary-side regulated flyback converters
- Up to 7 W DC/DC conversion
- Wide-input power conversion stages
- Boundary-conduction flyback power supplies
- Quasi-resonant MOSFET flyback designs
- Optocoupler-free output regulation designs
Procurement Notes
When requesting a quote for LM5180, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What input voltage range does the LM5180 support?
The LM5180 has a recommended input voltage range of 4.5-65 V. Device start-up is specified at 4.5 V minimum, and after start-up the device can continue operation with input voltage down to 3.5 V.
What power switch is integrated in the LM5180?
The LM5180 integrates an internal N-channel power MOSFET rated for 100 V and 1.5 A. Its typical on-state resistance is 0.4 ohm under the listed ISW=100 mA condition.
How does the LM5180 regulate output voltage?
The device uses primary-side regulated flyback control. The extracted facts state that output voltage is sampled from the primary-side flyback voltage, with no optocoupler, voltage reference, or third transformer winding required.
What package is used for the LM5180?
The LM5180 is supplied in an 8-pin WSON (NGU) package with wettable flanks. The package body is 4.00 mm x 4.00 mm and uses a 0.8 mm pin pitch.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.