Overview
The TPS54622RHLT from Texas Instruments is a highly integrated 4.5-V to 17-V, 6-A synchronous step-down (buck) converter. This device is optimized for small designs, offering high efficiency and space savings through the integration of high-side and low-side MOSFETs. The TPS54622 is packaged in a thermally enhanced 3.5-mm × 3.5-mm VQFN package, making it suitable for high-density distributed power systems and high-performance point-of-load regulation. It features current mode control, which reduces the component count, and a high switching frequency that minimizes the footprint of the inductor.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN and PVIN) | 4.5 | - | 17 | V |
| Output Current | - | - | 6 | A |
| Switching Frequency Range | 200 kHz | - | 1.6 MHz | - |
| High-Side Switch Current Limit Threshold | 8 | - | 14 | A |
| Low-Side Switch Sourcing Current Limit | 6.5 | - | 15 | A |
| Low-Side Switch Sinking Current Limit | 2 | - | 4 | A |
| Operating Junction Temperature Range | -40°C | - | 150°C | - |
| Voltage Reference Overtemperature | 0.6V ±1% | - | - | - |
| Package Type | - | - | VQFN (14 pins) | - |
| Package Size | - | - | 3.5 mm × 3.5 mm | - |
Key Features
- Integrated 26-mΩ and 19-mΩ MOSFETs for high efficiency.
- Split Power Rail: 1.6 V to 17 V on PVIN.
- 200-kHz to 1.6-MHz Switching Frequency, synchronizable to an external clock.
- Hiccup Current Limit and thermal hiccup protection for overcurrent and thermal shutdown.
- Monotonic Start-Up Into Prebiased Outputs.
- Adjustable Slow Start and Power Sequencing.
- Power Good Output Monitor for Undervoltage and Overvoltage.
- Adjustable Input Undervoltage Lockout.
- Current mode control reducing component count and inductor footprint.
Applications
- High-Density Distributed Power Systems.
- High-Performance Point-of-Load Regulation.
- Broadband, Networking, and Optical Communications Infrastructure.
Q & A
- What is the input voltage range of the TPS54622?
The input voltage range is from 4.5 V to 17 V.
- What is the maximum output current of the TPS54622?
The maximum output current is 6 A.
- What is the switching frequency range of the TPS54622?
The switching frequency range is from 200 kHz to 1.6 MHz.
- Does the TPS54622 have built-in current limiting and thermal protection?
Yes, it features hiccup current limit and thermal hiccup protection.
- What is the operating junction temperature range of the TPS54622?
The operating junction temperature range is from -40°C to 150°C.
- Can the TPS54622 be synchronized to an external clock?
Yes, it can be synchronized to an external clock.
- What type of package is the TPS54622 available in?
The TPS54622 is available in a 14-pin VQFN package with an exposed thermal pad.
- What are some common applications of the TPS54622?
Common applications include high-density distributed power systems, high-performance point-of-load regulation, and broadband, networking, and optical communications infrastructure.
- Does the TPS54622 support power sequencing and slow start?
Yes, it supports adjustable slow start and power sequencing.
- Is there a power good output monitor on the TPS54622?
Yes, it includes a power good output monitor for undervoltage and overvoltage conditions.
