Specifications
| Type | Description |
|---|---|
| Part Number | TPS543320 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | RPY VQFN-HR, 14-pin, 2.50 mm × 3.00 mm, 0.5-mm pitch |
| Input Voltage Range | 4 V to 18 V; recommended operating conditions |
| Output Voltage Range | 0.5 V to 7 V; recommended operating conditions |
| Output Current | 3 A; recommended operating conditions |
| Operating Junction Temperature | -40°C to 150°C; recommended operating conditions |
| External Clock Frequency | 400 kHz to 2600 kHz; fSYNC recommended operating range |
| Switching Frequency Options | 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, 2.2 MHz; selectable switching frequencies |
| High-Side MOSFET On-Resistance | 25 mΩ typ; TJ = 25°C, VIN = 12 V, VBOOT-SW = 4.5 V |
| Low-Side MOSFET On-Resistance | 13.9 mΩ typ; TJ = 25°C, VBP5 = 4.5 V |
| Feedback Voltage | 497.5 mV min, 500 mV typ, 502.5 mV max; TJ = -40°C to 150°C |
| Reference Accuracy | ±0.5%; over full temperature range |
| VIN Operating Non-Switching Supply Current | 1200 µA typ, 1600 µA max; VEN = 1.3 V, VFB = 550 mV, VIN = 12 V |
| VIN Shutdown Supply Current | 15 µA typ, 25 µA max; VEN = 0 V, VIN = 12 V |
| VIN UVLO Rising Threshold | 3.9 V min, 4 V typ, 4.1 V max; VIN rising |
| VIN UVLO Hysteresis | 150 mV typ; input undervoltage lockout |
| EN Rising Threshold | 1.2 V typ, 1.25 V max; EN rising, enable switching |
| EN Falling Threshold | 1.05 V typ, 1.1 V max; EN falling, disable switching |
| EN Voltage Hysteresis | 100 mV typ; enable pin |
| EN Pin Sourcing Current | 0.4 µA typ, 1.5 µA max; VEN = 1.1 V |
| EN Pin Sourcing Current | 11.6 µA typ; VEN = 1.3 V |
| BP5 Internal LDO Output Voltage | 4.5 V typ; VIN = 12 V |
| BP5 Dropout Voltage | 350 mV typ; VIN - VBP5, VIN = 3.8 V |
| BP5 Short-Circuit Current Limit | 75 mA typ; VIN = 12 V |
| FB Input Leakage Current | 1 nA typ; VFB = 500 mV, non-switching, VIN = 12 V |
| Switching Frequency | 450 kHz min, 500 kHz typ, 550 kHz max; RFSEL = 24.3 kΩ |
| Switching Frequency | 675 kHz min, 750 kHz typ, 825 kHz max; RFSEL = 17.4 kΩ |
| Switching Frequency | 900 kHz min, 1000 kHz typ, 1100 kHz max; RFSEL = 11.8 kΩ |
| Switching Frequency | 1350 kHz min, 1500 kHz typ, 1650 kHz max; RFSEL = 8.06 kΩ |
| Switching Frequency | 1980 kHz min, 2200 kHz typ, 2420 kHz max; RFSEL = 4.99 kΩ |
| SYNC High-Level Input Voltage | 1.8 V min; synchronization input |
| SYNC Low-Level Input Voltage | 0.8 V max; synchronization input |
| Soft-Start Time | 0.5 ms typ; RMODE = 1.78 kΩ |
| Soft-Start Time | 1 ms typ; RMODE = 2.21 kΩ |
| Soft-Start Time | 2 ms typ; RMODE = 2.74 kΩ |
| Soft-Start Time | 4 ms typ; RMODE = 3.32 kΩ |
| BOOT-SW UVLO Rising Threshold | 3.2 V typ; VBOOT-SW rising |
| BOOT-SW UVLO Falling Threshold | 2.8 V typ; VBOOT-SW falling |
| Minimum ON Pulse Width | 30 ns typ, 37 ns max; IOUT > 1/2 IL_PK-PK |
| Minimum OFF Pulse Width | 115 ns typ, 140 ns max; specified by design, not production tested |
| High-Side Peak Current Limit | 4.6 A min, 4.9 A typ, 5.1 A max; RMODE = 1.78 kΩ |
| High-Side Peak Current Limit | 2.9 A min, 3.3 A typ, 3.5 A max; RMODE = 22.1 kΩ |
| Low-Side Sourcing Current Limit | 3.8 A min, 4.2 A typ, 4.5 A max; RMODE = 1.78 kΩ |
| Low-Side Sourcing Current Limit | 2.7 A min, 3.0 A typ, 3.3 A max; RMODE = 22.1 kΩ |
| Low-Side Sinking Current Limit | 1.9 A typ; current into SW pin |
| Overvoltage Protection Threshold | 120% VREF; VFB rising |
| Undervoltage Protection Threshold | 80% VREF; VFB falling |
| PGOOD Threshold High Fault | 113% VREF min, 116% VREF typ, 119% VREF max; VFB rising |
| PGOOD Threshold High Good | 105% VREF min, 108% VREF typ, 111% VREF max; VFB falling |
| PGOOD Threshold Low Good | 89% VREF min, 92% VREF typ, 95% VREF max; VFB rising |
| PGOOD Threshold Low Fault | 81% VREF min, 84% VREF typ, 87% VREF max; VFB falling |
| PGOOD Leakage Current | 5 µA max; open-drain output high, VPGOOD = 4.7 V |
| PGOOD Low-Level Output Voltage | 0.5 V max; IPGOOD = 2 mA, VIN = 12 V |
| Minimum VIN for Valid PGOOD Output | 0.9 V typ, 1 V max; PGOOD output validity |
| Hiccup Time Before Restart | 7 × tSS ms; fault hiccup mode |
| Output Discharge Resistance | 100 Ω typ; VIN = 12 V, VSW = 0.5 V, power conversion disabled |
| Thermal Shutdown Threshold | 165°C min, 175°C typ; temperature rising, specified by design |
| Thermal Shutdown Hysteresis | 12°C typ; specified by design |
| Absolute Maximum VIN | -0.3 V to 20 V; input voltage VIN |
| Absolute Maximum BOOT to SW Voltage | -0.3 V to 6 V; BOOT to SW input voltage |
| Absolute Maximum Logic Pin Voltage | -0.3 V to 6 V; EN, PGOOD, MODE, SYNC/FSEL, FB pins |
| HBM ESD Rating | ±2000 V; ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | ±500 V; ANSI/ESDA/JEDEC JS-002 |
| Junction-to-Ambient Thermal Resistance | 58.9°C/W; RPY QFN, JEDEC, 14 pins |
| Junction-to-Ambient Thermal Resistance | 29.1°C/W; RPY QFN, TI EVM, 14 pins |
| Datasheet Status | request_only |
Product Overview
The TPS543320 is a Texas Instruments synchronous buck converter for Power_Management designs requiring a regulated step-down output. Recommended operating conditions specify a 4 V to 18 V input range, 0.5 V to 7 V output range, and 3 A output current capability. The feedback reference is specified at 497.5 mV minimum, 500 mV typical, and 502.5 mV maximum across -40°C to 150°C, with ±0.5% reference accuracy over the full temperature range.
Frequency configuration is supported through selectable switching options of 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz, and synchronization supports an external clock from 400 kHz to 2600 kHz. The device includes EN thresholds, VIN UVLO behavior, BOOT-SW UVLO thresholds, soft-start timing options, PGOOD thresholds, overvoltage and undervoltage protection thresholds, hiccup restart timing, output discharge, and thermal shutdown behavior.
The device is supplied in an RPY VQFN-HR 14-pin package with 2.50 mm × 3.00 mm body size and 0.5-mm pitch. Thermal data includes 58.9°C/W junction-to-ambient resistance on JEDEC conditions and 29.1°C/W on the TI EVM condition.
Key Features
- 4 V to 18 V recommended input operating range
- 0.5 V to 7 V regulated output voltage range
- 3 A recommended output current capability
- Selectable 500 kHz to 2.2 MHz switching frequencies
- 400 kHz to 2600 kHz external clock synchronization range
- ±0.5% reference accuracy over full temperature range
- 25 mΩ typical high-side MOSFET on-resistance
- 13.9 mΩ typical low-side MOSFET on-resistance
- PGOOD thresholds referenced to VREF window limits
- Thermal shutdown threshold specified at 165°C minimum
Typical Applications
- Step-down Power_Management rails
- 3 A point-of-load converters
- Synchronized buck regulator designs
- Adjustable low-voltage supply rails
- Systems using PGOOD monitoring
- Thermally constrained VQFN-HR assemblies
Procurement Notes
When requesting a quote for TPS543320, 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 TPS543320 support?
The TPS543320 has a recommended input voltage operating range of 4 V to 18 V. Its absolute maximum VIN rating is -0.3 V to 20 V, which is a stress limit rather than the recommended operating range.
What output capability is specified for TPS543320?
The device is specified for a 0.5 V to 7 V output voltage range and 3 A output current under recommended operating conditions. Feedback regulation is based on a 500 mV typical feedback voltage.
Which switching frequencies are available on TPS543320?
Selectable switching frequency options are 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz. Synchronization input operation supports an external clock frequency range from 400 kHz to 2600 kHz.
What package is used for the TPS543320?
The TPS543320 is supplied in an RPY VQFN-HR package with 14 pins. The package measures 2.50 mm × 3.00 mm and uses a 0.5-mm 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.