Specifications
| Type | Description |
|---|---|
| Part Number | LM5175 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | HTSSOP-28 9.7 mm x 4.4 mm; QFN-28 4.0 mm x 5.0 mm |
| Input Voltage Range | 3.5-42 V; recommended operating condition |
| Maximum Input Voltage | 60 V; absolute maximum rating for VIN, EN/UVLO, VISNS, VOSNS, ISNS(+), ISNS(-) |
| Output Voltage Range | 0.8-55 V; recommended operating condition |
| BIAS Supply Voltage Range | 8-36 V; recommended operating condition |
| BIAS Absolute Maximum Voltage | -0.3 to 40 V; absolute maximum rating |
| Enable Voltage Range | 0-42 V; recommended operating condition for EN/UVLO |
| Average Current Sense Common Mode Range | 0-55 V; recommended operating condition for ISNS(+), ISNS(-) |
| Operating Junction Temperature Range | -40 to 125 °C; recommended operating condition |
| Absolute Maximum Operating Junction Temperature | -40 to 150 °C; absolute maximum rating |
| Storage Temperature Range | -65 to 150 °C; absolute maximum rating |
| Operating Frequency Range | 100-600 kHz; recommended operating condition |
| VCC Regulation Voltage | 6.95 V min, 7.35 V typ, 7.88 V max; VBIAS=0 V, VCC open, VIN=24 V unless otherwise stated |
| VCC Undervoltage Lockout | 3.11 V min, 3.27 V typ, 3.43 V max; VCC increasing, VIN=24 V unless otherwise stated |
| VCC Undervoltage Hysteresis | 160 mV typ; VIN=24 V unless otherwise stated |
| VCC Current Limit | 65 mA typ; VCC=0 V, VIN=24 V unless otherwise stated |
| VCC Regulator Output Impedance | 9.3 Ω typ, 16 Ω max; IVCC=30 mA, VIN=3.5 V |
| Shutdown Current | 1.4 µA typ, 10 µA max; VEN/UVLO=0 V |
| Standby Current | 0.7 mA typ, 2 mA max; VEN/UVLO=1.1 V, non-switching |
| Operating Current | 1.65 mA typ, 4 mA max; VEN/UVLO=2 V, VFB=0.9 V |
| BIAS Switchover Voltage | 7.25 V min, 8 V typ, 8.75 V max; VIN=24 V |
| EN/UVLO Standby Threshold | 0.55 V min, 0.79 V typ, 0.97 V max; EN/UVLO rising |
| EN/UVLO Standby Source Current | 1 µA min, 2 µA typ, 3 µA max; VEN/UVLO=1.1 V |
| EN/UVLO Operating Threshold | 1.17 V min, 1.23 V typ, 1.29 V max; EN/UVLO rising |
| FB Absolute Maximum Voltage | -0.3 to 3.6 V; absolute maximum rating for FB, SS, DITH, RT/SYNC, SLOPE, COMP |
| SW1/SW2 Absolute Maximum Voltage | -1 to 60 V; absolute maximum rating |
| SW1/SW2 Transient Absolute Maximum Voltage | -3.0 to 65 V; 20 ns transient |
| BOOT1/BOOT2 Absolute Maximum Voltage | -0.3 to 68 V; absolute maximum rating |
| LDRV1/LDRV2 Absolute Maximum Voltage | -0.3 to 8.5 V; absolute maximum rating |
| CS/CSG Absolute Maximum Voltage | -0.3 to 0.3 V; absolute maximum rating |
| HBM ESD Rating | ±2000 V; human body model ESD stress voltage |
| CDM ESD Rating | ±750 V; charged device model ESD stress voltage |
| Junction-to-Ambient Thermal Resistance | 33.1 °C/W HTSSOP-28; 34.7 °C/W QFN-28; thermal metric RθJA |
| Junction-to-Case Top Thermal Resistance | 17.7 °C/W HTSSOP-28; 26.6 °C/W QFN-28; thermal metric RθJC(top) |
| Junction-to-Board Thermal Resistance | 14.9 °C/W HTSSOP-28; 6.3 °C/W QFN-28; thermal metric RθJB |
| Junction-to-Case Bottom Thermal Resistance | 1.1 °C/W HTSSOP-28; 2.0 °C/W QFN-28; thermal metric RθJC(bot) |
| Output Overvoltage Protection | Supported; feature description |
| Current Limit Type | Cycle-by-cycle current limit; optional hiccup mode; feature description |
| Operation Modes | Selectable CCM or DCM with pulse skipping; feature description |
| Average Current Limit Threshold | 50 mV; ISNS(+) to ISNS(-), slow constant-current loop active |
| Datasheet Status | request_only |
Product Overview
The LM5175 is a Texas Instruments 4-switch buck-boost controller for Power_Management designs that require regulation across input-to-output voltage relationships. Its recommended input voltage range is 3.5-42 V, while the recommended output voltage range is 0.8-55 V. The device also supports a BIAS supply range of 8-36 V and an EN/UVLO recommended range of 0-42 V.
Control and protection features include selectable CCM or DCM operation with pulse skipping, output overvoltage protection, cycle-by-cycle current limit, and optional hiccup mode. The average current sense common-mode range is 0-55 V, and the average current limit threshold is 50 mV from ISNS(+) to ISNS(-) when the slow constant-current loop is active.
Package options are HTSSOP-28 at 9.7 mm x 4.4 mm and QFN-28 at 4.0 mm x 5.0 mm. Thermal metrics include RθJA of 33.1 °C/W for HTSSOP-28 and 34.7 °C/W for QFN-28, with recommended operating junction temperature from -40 to 125 °C.
Key Features
- 3.5-42 V recommended input voltage range
- 0.8-55 V recommended output voltage range
- 100-600 kHz recommended operating frequency range
- Selectable CCM or DCM with pulse skipping
- Cycle-by-cycle current limit with optional hiccup mode
- Output overvoltage protection is supported
- 50 mV average current limit threshold
- -40 to 125 °C operating junction range
- HTSSOP-28 and QFN-28 package options
Typical Applications
- 4-switch buck-boost converters
- DC/DC voltage regulation
- Wide-input power management
- Adjustable output power rails
- Constant-current loop designs
- Pulse-skipping converter operation
- Overvoltage-protected power stages
Procurement Notes
When requesting a quote for LM5175, 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 LM5175 support?
The LM5175 has a recommended input voltage operating range of 3.5-42 V. Its absolute maximum rating is 60 V for VIN and related sensing and enable pins, according to the extracted datasheet facts.
What output voltage range is specified for LM5175?
The recommended output voltage range for the LM5175 is 0.8-55 V. This specification applies under the recommended operating conditions listed in the extracted datasheet facts.
Which packages are listed for the LM5175?
The listed package options are HTSSOP-28 measuring 9.7 mm x 4.4 mm and QFN-28 measuring 4.0 mm x 5.0 mm. Thermal resistance values are specified separately for both packages.
What protection and current limit features are provided?
The LM5175 supports output overvoltage protection, cycle-by-cycle current limit, and optional hiccup mode. The extracted facts also list a 50 mV average current limit threshold between ISNS(+) and ISNS(-).
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.