Specifications
| Type | Description |
|---|---|
| Part Number | TPS5420 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | D (SOIC, 8), 4.9 mm x 6 mm |
| Input Voltage Range | 5.5 to 36 V |
| Continuous Output Current | Up to 2 A |
| Peak Output Current | 3 A |
| Efficiency | Up to 95% |
| Output Voltage Range | Adjustable down to 1.22 V |
| Initial Output Voltage Accuracy | 1.5% |
| Switching Frequency | 400 min, 500 typ, 600 max kHz |
| Operating Junction Temperature | -40 to 125 °C |
| VIN Absolute Maximum Rating | -0.3 to 40 V |
| ENA Absolute Maximum Rating | -0.3 to 7 V |
| VSENSE Absolute Maximum Rating | -0.3 to 3 V |
| BOOT to PH Absolute Maximum Rating | -0.3 to 6 V |
| BOOT to GND Absolute Maximum Rating | -0.3 V |
| PH Steady-State Absolute Maximum Rating | -0.6 to 40 V |
| PH Transient Absolute Maximum Rating | -1.2 V |
| PH Source Current | Internally limited |
| PH Leakage Current | 10 µA |
| Operating Virtual Junction Temperature | -40 to 150 °C |
| Storage Temperature | -65 to 150 °C |
| HBM ESD Rating | ±2000 V |
| CDM ESD Rating | ±750 V |
| Junction-to-Ambient Thermal Resistance | 75 °C/W |
| Junction-to-Ambient Thermal Resistance | 106 °C/W |
| Junction-to-Case Top Thermal Resistance | 54 °C/W |
| Junction-to-Board Thermal Resistance | 55 °C/W |
| Junction-to-Top Characterization Parameter | 15 °C/W |
| Junction-to-Board Characterization Parameter | 56 °C/W |
| Junction-to-Case Bottom Thermal Resistance | N/A |
| VIN Quiescent Current | 2 typ, 4.4 max mA |
| VIN Shutdown Supply Current | 15 typ, 50 max µA |
| VIN UVLO Rising Threshold | 5.3 typ, 5.5 max V |
| VIN UVLO Hysteresis | 0.35 V |
| Feedback Voltage | 1.202 min, 1.221 typ, 1.239 max V |
| Feedback Voltage | 1.196 min, 1.221 typ, 1.245 max V |
| Minimum ON Pulse Width | 150 typ, 200 max ns |
| Maximum Duty Cycle | 85% min, 89% typ |
| ENA Rising Threshold | 1.3 V |
| ENA Falling Threshold | 0.5 V |
| ENA Hysteresis | 325 mV |
| Internal Slow-Start Time | 6.6 min, 8 typ, 10 max ms |
| High-Side Peak Current Limit | 3 min, 4 typ, 5 max A |
| Hiccup Time Before Restart | 13 min, 16 typ, 20 max ms |
| High-Side MOSFET On-Resistance | 100 typ, 230 max mΩ |
| High-Side MOSFET On-Resistance | 125 mΩ |
| Thermal Shutdown Threshold | 135 min, 162 typ °C |
| Thermal Shutdown Hysteresis | 14 °C |
| Bootstrap Capacitor | 0.01 µF |
| ENA Internal Pullup Resistor | 1.5 MΩ |
| ENA Off Threshold Description | Below 0.5 V stops switching |
| ENA On Threshold Description | Above 1.3 V starts switching |
| Datasheet Status | request_only |
Product Overview
The TPS5420 is a Texas Instruments Power_Management IC configured as a step-down buck converter. It operates from a recommended 5.5 to 36 V input range and provides an adjustable output voltage down to 1.22 V. The device is specified for up to 2 A continuous output current and 3 A peak output current, with up to 95% efficiency enabled by the integrated MOSFET switch.
Electrical operation is centered on a nominal 500 kHz switching frequency, with a 400 to 600 kHz specified range over -40 °C to 125 °C junction temperature and 5.5 to 36 V input. Feedback voltage is specified at 1.221 V typical, with temperature-qualified limits, and the converter includes an internal 8 ms typical slow-start function.
The TPS5420 is supplied in a D SOIC-8 package measuring 4.9 mm x 6 mm. Pin-level implementation includes a 0.01 µF low-ESR bootstrap capacitor from BOOT to PH and an ENA pin with an internal 1.5 MΩ pullup resistor. The ENA function starts switching above 1.3 V and stops switching below 0.5 V.
Key Features
- 5.5 to 36 V recommended input voltage range
- Up to 2 A continuous output current
- 3 A peak output current capability
- Adjustable output voltage down to 1.22 V
- 1.5% initial output voltage accuracy
- 400 to 600 kHz switching frequency range
- Internal slow-start time of 8 ms typical
- High-side peak current limit of 4 A typical
- Thermal shutdown threshold of 162 °C typical
- D SOIC-8 package, 4.9 mm x 6 mm
Typical Applications
- Step-down voltage regulation
- 5.5 to 36 V input rails
- Adjustable low-voltage outputs
- 2 A output power rails
- SOIC-8 power converter assemblies
- Enable-controlled switching supplies
- Thermally managed power designs
Procurement Notes
When requesting a quote for TPS5420, 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 TPS5420 support?
The TPS5420 supports a recommended operating input voltage range of 5.5 to 36 V over the operating junction temperature range. Its VIN absolute maximum rating is -0.3 to 40 V.
What output current is specified for the TPS5420?
The feature summary specifies up to 2 A continuous output current and 3 A peak output current. The high-side peak current limit is specified as 3 A minimum, 4 A typical, and 5 A maximum.
How is the TPS5420 enable pin specified?
The ENA pin has an internal 1.5 MΩ pullup resistor and can be left floating. Switching starts above 1.3 V and stops below 0.5 V, with 325 mV ENA hysteresis specified.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 20, 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.