TPS54620 - 6A Synchronous Buck Converter | Texas Instruments
MPN: TPS54620 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.19 | $2,190.00 |
TPS54620 Overview
A synchronous buck converter is a type of DC-DC switching regulator that steps down voltage with high efficiency by using two transistors (high-side and low-side) that switch alternately, minimizing conduction losses compared to asynchronous designs. It belongs to the broader category of voltage regulators, which are essential in power management ICs for converting and stabilizing supply voltages in electronic systems. The TPS54620 integrates both MOSFETs, reducing external component count and board space.
Key features include integrated 26 mΩ and 19 mΩ MOSFETs, a split power rail allowing 1.6 V to 17 V on PVIN, a switching frequency range of 200 kHz to 1.6 MHz, synchronization to an external clock, and a low 2-μA shutdown quiescent current. These features enable high efficiency across a wide load range and flexible design for noise-sensitive applications.
Technically, the TPS54620 uses a current-mode control architecture with pulse-by-pulse current protection, ensuring robust operation under overload conditions. The 0.8-V reference with ±1% accuracy over temperature provides precise output regulation. The device also includes thermal shutdown and overcurrent protection, enhancing reliability in demanding environments.
Typical applications include industrial power supplies, automotive infotainment, telecom equipment, and point-of-load converters for FPGAs and DSPs. Its wide input range and high output current make it suitable for 12-V bus systems and battery-powered devices.
When designing with the TPS54620, ensure proper input and output capacitor selection to minimize ripple and maintain stability. The switching frequency can be synchronized to an external clock to avoid beat frequencies in multi-rail systems. Thermal management is critical; the QFN package's exposed pad must be soldered to a sufficient copper area for heat dissipation.
Drop-in alternatives for TPS54620 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS54320RGYR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS54821RHLR
⚡ Same Package📋 Reference alternative (not in catalog)
SGM61164
✅ Drop-In📋 Reference alternative (not in catalog)
TPS543620
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS62914
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS54620 Maximum Ratings & Electrical Characteristics
| Input Voltage Range | 4.5 V to 17 V |
| Output Voltage Range | 0.8 V to 15 V (adjustable) |
| Maximum Output Current | 6 A |
| Reference Voltage | 0.8 V ±1% |
| Switching Frequency | 200 kHz to 1.6 MHz |
| High-Side MOSFET On-Resistance | 26 mΩ |
| Low-Side MOSFET On-Resistance | 19 mΩ |
| Shutdown Quiescent Current | 2 μA |
| PVIN Range | 1.6 V to 17 V |
| Package | 14-VFQFN (RGY) 3.5 mm × 3.5 mm |
| Operating Temperature Range | -40°C to +125°C |
| Synchronization | External clock |
| Protection Features | Pulse-by-pulse current limit, thermal shutdown |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TPS54620 Pin Configuration
| Pin 1 | BOOT — Bootstrap capacitor connection for high-side FET driver |
| Pin 2 | VIN — Input supply voltage |
| Pin 3 | PVIN — Power input for high-side FET |
| Pin 4 | EN — Enable pin (active high) |
| Pin 5 | RT/CLK — Switching frequency set or external clock sync |
| Pin 6 | COMP — Compensation network connection |
| Pin 7 | FB — Feedback voltage sense |
| Pin 8 | GND — Ground |
| Pin 9 | SW — Switch node output |
| Pin 10 | SW — Switch node output |
| Pin 11 | SW — Switch node output |
| Pin 12 | GND — Ground |
| Pin 13 | GND — Ground |
| Pin 14 | GND — Ground (exposed pad) |
Typical Applications
TPS54620 is suitable for 6 applications: Industrial Power Supplies, Automotive Infotainment, Telecom Equipment, Point-of-Load Converters, Battery-Powered Devices, FPGA and DSP Power.
Industrial Power Supplies
The TPS54620's 4.5-V to 17-V input range and 6-A output make it ideal for industrial power supplies converting 12-V or 24-V buses to lower voltages. Its high efficiency reduces heat dissipation, and the small QFN package saves board space. The integrated MOSFETs simplify design, while the adjustable output down to 0.8 V supports various logic levels. Synchronization to an external clock helps avoid interference in noisy industrial environments.
Recommended
Automotive Infotainment
In automotive infotainment systems, the TPS54620 provides a stable 5-V or 3.3-V rail from the 12-V battery. Its wide input range handles voltage transients, and the high switching frequency allows small external components, saving PCB area. The low shutdown quiescent current (2 μA) helps reduce battery drain when the system is off. The device's robust protection features ensure reliable operation in harsh automotive environments.
Recommended
Telecom Equipment
Telecom equipment often requires multiple voltage rails from a 12-V or 48-V input. The TPS54620's 6-A output can power FPGAs, ASICs, and line cards. Its synchronization feature allows multiple converters to operate at the same frequency, reducing beat noise. The high efficiency minimizes heat in densely packed racks, and the small package enables high power density.
Recommended
Point-of-Load Converters
The TPS54620 is ideal for point-of-load (POL) converters that step down a 5-V or 12-V bus to core voltages for DSPs, FPGAs, and microcontrollers. Its 0.8-V reference with ±1% accuracy ensures precise voltage regulation for low-voltage digital cores. The integrated MOSFETs and small QFN package reduce component count and board space, enabling compact POL designs. The adjustable output and external synchronization provide design flexibility.
Recommended
Battery-Powered Devices
In battery-powered devices, the TPS54620's low shutdown quiescent current (2 μA) extends standby time. Its wide input range accommodates battery voltage variations, and the high efficiency maximizes battery life during operation. The small package is suitable for portable equipment. The device can be synchronized to avoid interference with sensitive RF circuits.
Recommended
FPGA and DSP Power
FPGAs and DSPs require multiple low-voltage, high-current rails. The TPS54620 can provide a 6-A rail at 1.0 V or 1.2 V with tight regulation. Its fast transient response handles dynamic load changes, and the synchronization feature allows multiple converters to operate in phase, reducing input ripple. The small package and integrated FETs simplify layout for dense designs.
Recommended
Recommended Products Summary
Engineering reference data for TPS54620 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS54320RGYR | TPS54821RHLR | SGM61164 |
|---|---|---|---|---|
| Package | 14-VFQFN (RGY) | 14-VFQFN (RGY) | 14-VFQFN (RHL) | 14-VFQFN (RGY) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | SGMC |
| Output Current | 6 A | 3 A | 8 A | 6 A |
| Pin Compatibility | Reference | Pin-compatible | Not pin-compatible | Pin-compatible |
Key Differentiators
- Higher output current (6 A) than TPS54320 (3 A) (vs TPS54320RGYR)
- Lower on-resistance MOSFETs (26 mΩ/19 mΩ) than TPS54320 (vs TPS54320RGYR)
- Pin-compatible with TPS54320 (vs TPS54320RGYR)
Design Notes
Place input and output capacitors close to the IC pins to minimize parasitic inductance. Use a 10-μF ceramic capacitor for input and a 22-μF ceramic capacitor for output. The exposed pad must be soldered to a large copper area for thermal dissipation.
The TPS54620 in a 3.5-mm QFN package can dissipate significant power at high currents. Ensure adequate copper area on the PCB and consider thermal vias under the exposed pad. For 6-A output at low input-output differential, efficiency is high, but at high differentials, power loss may require heatsinking.
Do not exceed the absolute maximum input voltage of 17 V. The PVIN pin can operate from 1.6 V to 17 V, but VIN must be within 4.5 V to 17 V. Ensure the bootstrap capacitor is placed correctly for high-side FET driving. Use a proper compensation network per the datasheet to ensure stability.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; automotive-grade variants may exist.
