Specifications
| Type | Description |
|---|---|
| Part Number | LM5164 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | DDA, 8-pin SO PowerPAD, 4.9 mm x 6 mm |
| Input voltage range | 6 to 100 V; recommended operating conditions |
| Output current | 1 A; integrated high-side and low-side MOSFETs |
| Load current | 1 A nominal, 1.25 A max; recommended operating conditions |
| Switching frequency | 1000 kHz max; recommended operating conditions |
| Programmable on-time | 50 ns min, 10000 ns max; recommended operating conditions |
| Minimum controllable on-time | 50 ns; feature description |
| Minimum controllable off-time | 50 ns; feature description |
| No-load input quiescent current | 10.5 uA; feature list |
| Shutdown quiescent current | 3 uA; feature list |
| VIN shutdown current | 3 uA typ, 15 uA max; VEN = 0 V |
| VIN sleep current | 10.5 uA typ, 25 uA max; VEN = 2.5 V, VFB = 1.5 V |
| VIN active current | 600 uA typ, 880 uA max; VEN = 2.5 V |
| Internal voltage reference | 1.2 V; feature list |
| FB regulation voltage | 1.181 V min, 1.2 V typ, 1.218 V max; VFB falling |
| Shutdown threshold rising | 1.1 V; VEN/UVLO rising |
| Shutdown threshold falling | 0.45 V; VEN/UVLO falling |
| Enable threshold rising | 1.45 V min, 1.5 V typ, 1.55 V max; VEN/UVLO rising |
| Enable threshold falling | 1.35 V min, 1.4 V typ, 1.44 V max; VEN/UVLO falling |
| EN/UVLO shutdown mode threshold | Below 1.1 V; converter shutdown, all functions disabled |
| EN/UVLO standby mode range | Greater than 1.1 V and below 1.5 V; internal VCC regulator operational, no switching |
| EN/UVLO startup threshold | Above 1.5 V; start-up sequence begins |
| High-side MOSFET on-resistance | 0.725 ohm typ; ISW = -100 mA |
| Low-side MOSFET on-resistance | 0.33 ohm typ; ISW = 100 mA |
| Low-side synchronous rectifier resistance | 0.34 ohm; feature list |
| Soft-start time | 1.75 ms min, 3 ms typ, 4.75 ms max; internal soft-start |
| Peak current limit threshold high-side | 1.25 A min, 1.5 A typ, 1.75 A max; high-side current limit |
| Peak current limit threshold low-side | 1.25 A min, 1.5 A typ, 1.75 A max; low-side current limit |
| Valley current limit threshold | 0.95 A min, 1.2 A typ, 1.4 A max; current limit |
| Peak-to-valley current limit delta | 200 mA min, 300 mA typ; minimum of IPEAK1 or IPEAK2 minus IVALLEY |
| Thermal shutdown threshold | 175 °C typ; TJ rising |
| Thermal shutdown hysteresis | 10 °C typ; thermal shutdown recovery |
| Operating junction temperature | -40 to 150 °C; absolute maximum ratings and recommended operating range |
| Storage temperature | -65 to 150 °C; absolute maximum ratings |
| VIN to GND absolute maximum | -0.3 to 100 V; absolute maximum ratings |
| EN to GND absolute maximum | -0.3 to 100 V; absolute maximum ratings |
| FB to GND absolute maximum | -0.3 to 5.5 V; absolute maximum ratings |
| RON to GND absolute maximum | -0.3 to 5.5 V; absolute maximum ratings |
| BST to GND absolute maximum | -0.3 to 105.5 V; absolute maximum ratings |
| BST to SW absolute maximum | -0.3 to 5.5 V; absolute maximum ratings |
| SW to GND absolute maximum | -1.5 to 100 V; absolute maximum ratings |
| SW to GND transient absolute minimum | -3 V; 20 ns transient |
| PGOOD to GND absolute maximum | -0.3 to 14 V; absolute maximum ratings |
| External bootstrap capacitance absolute range | 1.5 to 2.5 nF; BST to SW capacitance, absolute maximum ratings |
| External bootstrap capacitance recommended | 2.2 nF; BST to SW capacitance |
| Bootstrap capacitor voltage rating | 50 V; X7R ceramic capacitor between BST and SW |
| Gate drive UVLO | 2.7 V min, 3.4 V typ; VBST rising |
| PGOOD upper threshold | 1.105 V min, 1.14 V typ, 1.175 V max; FB rising, PGOOD high to low |
| PGOOD lower threshold | 1.055 V min, 1.08 V typ, 1.1 V max; FB falling, PGOOD high to low |
| PGOOD threshold hysteresis | 60 mV typ; FB falling |
| PGOOD pulldown resistance | 30 ohm typ; VFB = 1 V |
| PGOOD output type | Open-drain output; pin function description |
| PGOOD pullup resistor range | 10 kohm to 100 kohm; external pullup resistor to source voltage |
| On-time 1 | 5000 ns; VVIN = 6 V, RRON = 75 kohm |
| On-time 2 | 1650 ns; VVIN = 6 V, RRON = 25 kohm |
| On-time 3 | 2550 ns; VVIN = 12 V, RRON = 75 kohm |
| On-time 4 | 830 ns; VVIN = 12 V, RRON = 25 kohm |
| HBM ESD rating | ±2000 V; human-body model, ANSI/ESDA/JEDEC JS-001 |
| CDM ESD rating | ±500 V; charged-device model, JEDEC JESD22-C101 |
| Junction-to-ambient thermal resistance | 43.4 °C/W; DDA SOIC, 8 pins |
| Junction-to-case top thermal resistance | 59.5 °C/W; DDA SOIC, 8 pins |
| Junction-to-board thermal resistance | 16.1 °C/W; DDA SOIC, 8 pins |
| Junction-to-top characterization parameter | 4.0 °C/W; DDA SOIC, 8 pins |
| Junction-to-board characterization parameter | 16.3 °C/W; DDA SOIC, 8 pins |
| Junction-to-case bottom thermal resistance | 3.9 °C/W; DDA SOIC, 8 pins |
| Control architecture | Constant on-time COT mode; integrated regulator architecture |
| Light-load operating mode | Diode emulation; high light-load efficiency |
| EMI performance | Meets CISPR 25 class 5 standard; feature list |
| Datasheet Status | request_only |
Product Overview
The LM5164 is a Texas Instruments synchronous buck DC/DC converter in the Power_Management category. It uses a constant on-time COT control architecture and integrates high-side and low-side MOSFETs for 1 A output current operation. Recommended operating conditions specify a 6 to 100 V input range, 1000 kHz maximum switching frequency, and programmable on-time from 50 ns to 10000 ns.
The device is packaged in a DDA, 8-pin SO PowerPAD package measuring 4.9 mm x 6 mm. Thermal data for the DDA SOIC 8-pin package includes 43.4 °C/W junction-to-ambient resistance and 3.9 °C/W junction-to-case bottom resistance. The operating junction temperature range is -40 to 150 °C, with storage from -65 to 150 °C.
System functions include EN/UVLO thresholds for shutdown, standby, and startup, an open-drain PGOOD output, internal soft-start, current-limit thresholds, gate-drive UVLO, and thermal shutdown. Application use is aligned with high-voltage buck regulation, low-quiescent-current power rails, CISPR 25 class 5 EMI-constrained rails, and systems requiring DDA PowerPAD assembly.
Key Features
- 6 to 100 V recommended input voltage range
- 1 A output with integrated high-side and low-side MOSFETs
- Constant on-time COT control architecture
- 50 ns minimum controllable on-time and off-time
- 10.5 uA no-load input quiescent current
- 3 uA shutdown quiescent current
- 1.2 V internal voltage reference
- Internal soft-start with 3 ms typical timing
- Open-drain PGOOD output with external pullup support
- Meets CISPR 25 class 5 EMI standard
Typical Applications
- High-voltage DC/DC regulation
- 1 A buck converter rails
- Low-quiescent-current power systems
- EN/UVLO controlled power sequencing
- PGOOD monitored supply rails
- CISPR 25 class 5 power rails
- Wide-temperature power management
- DDA PowerPAD converter assemblies
Procurement Notes
When requesting a quote for LM5164, 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 range does the LM5164 support?
The LM5164 has a recommended input voltage range of 6 to 100 V. Its VIN to GND absolute maximum rating is -0.3 to 100 V, so operation should be based on the recommended range rather than the absolute maximum limits.
What output current is specified for the LM5164?
The LM5164 is specified as a 1 A synchronous buck DC/DC converter with integrated high-side and low-side MOSFETs. Recommended load-current conditions list 1 A nominal operation and 1.25 A maximum.
How does the LM5164 handle enable and UVLO thresholds?
The EN/UVLO pin defines shutdown below 1.1 V, standby above 1.1 V and below 1.5 V, and startup above 1.5 V. Electrical thresholds include 1.5 V typical enable rising and 1.4 V typical enable falling.
What package and thermal data apply to LM5164?
The LM5164 uses a DDA, 8-pin SO PowerPAD package measuring 4.9 mm x 6 mm. For the DDA SOIC 8-pin package, junction-to-ambient thermal resistance is 43.4 °C/W and junction-to-case bottom resistance is 3.9 °C/W.
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.