Overview
The TPS54612, part of the SWIFT family of DC-DC regulators from Texas Instruments, is a low-input voltage, high-output current synchronous buck PWM converter. This device integrates all required active components, including high-performance voltage error amplifiers, an under-voltage-lockout circuit, and an internally and externally set slow-start circuit. It is designed to convert a higher DC input voltage to a lower DC output voltage with high efficiency and minimal component count.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3.0 | 6.0 | V | |
| Output Voltage | 1.2 | 1.2 | V | |
| Output Current Range | 0 | 6 | A | |
| PWM Frequency | 350 kHz | 550 kHz | 700 kHz | kHz |
| Quiescent Current | 6.2 | 8.4 | 12.8 | mA |
| Line Regulation | 0.088 | %/V | ||
| Load Regulation | ±5 mV | mV | ||
| Thermal Shutdown Trip Point | 135 | 150 | 165 | °C |
| Power MOSFET Switches rDS(on) | 26 | 47 | mΩ |
Key Features
- Integrated bootstrap switch and high-performance voltage error amplifiers for high transient response.
- Under-voltage-lockout circuit to prevent start-up until the input voltage reaches 3 V.
- Internally and externally set slow-start circuit to limit in-rush currents.
- Powergood output for processor/logic reset, fault signaling, and supply sequencing.
- Load protection by peak current limit and thermal shutdown.
- Adaptive dead-time control to prevent shoot-through current.
- High-efficiency operation with fixed or adjustable PWM frequency (280 kHz to 700 kHz).
- Thermally enhanced 28-pin TSSOP (PWP) PowerPAD package to eliminate bulky heatsinks.
Applications
- Low-voltage, high-density systems with power distributed at 5 V or 3.3 V.
- Point of load regulation for high-performance DSPs, FPGAs, ASICs, and microprocessors.
- Broadband, networking, and optical communications infrastructure.
- Portable computing and notebook PCs.
Q & A
- What is the input voltage range of the TPS54612?
The input voltage range is from 3.0 V to 6.0 V.
- What is the fixed output voltage of the TPS54612?
The fixed output voltage is 1.2 V.
- What is the maximum output current of the TPS54612?
The maximum output current is 6 A.
- What are the available PWM frequencies for the TPS54612?
The PWM frequencies can be fixed at 350 kHz or 550 kHz, or adjustable from 280 kHz to 700 kHz.
- What is the quiescent current of the TPS54612?
The quiescent current ranges from 6.2 mA to 12.8 mA depending on the operating frequency.
- Does the TPS54612 have thermal shutdown protection?
- What is the purpose of the powergood output in the TPS54612?
The powergood output is useful for processor/logic reset, fault signaling, and supply sequencing.
- How does the slow-start feature work in the TPS54612?
The slow-start feature linearly ramps up the reference voltage to prevent in-rush currents during startup.
- What package type is the TPS54612 available in?
The device is available in a thermally enhanced 28-pin TSSOP (PWP) PowerPAD package.
- What are some typical applications of the TPS54612?
Typical applications include low-voltage high-density systems, point of load regulation for high-performance processors, and portable computing devices.
