Overview
The TPS54613PWPG4, part of the TPS5461x family from Texas Instruments, is a high-performance, synchronous buck PWM converter. This device is designed to convert a higher DC input voltage to a lower DC output voltage, with a fixed output voltage of 1.5 V and a maximum output current of 6 A. It 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. The TPS54613PWPG4 is housed in a thermally enhanced 28-pin TSSOP (PWP) PowerPAD™ package, which eliminates the need for bulky heatsinks and reduces board area and total cost.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | VIN | 3.0 | 6.0 | V | |
| Output Voltage | 3 V ≤ VIN ≤ 6 V, 0 ≤ IL ≤ 6 A, −40°C ≤ TJ ≤ 125°C | 1.485 | 1.5 | 1.515 | V |
| Output Current | 6 | A | |||
| PWM Frequency | 280 kHz | 350 kHz / 550 kHz | 700 kHz | kHz | |
| Quiescent Current | fs = 350 kHz, FSEL ≤0.8 V, RT open, phase pin open | 6.2 | 9.6 | mA | |
| Line Regulation | IL = 3 A, 350 ≤ fs ≤ 550 kHz, TJ = 85°C | 0.088 | %/V | ||
| Load Regulation | IL = 3 A, 350 ≤ fs ≤ 550 kHz, TJ = 85°C | ± 3.0% | % | ||
| Thermal Shutdown Trip Point | 135 | 150 | 165 | °C | |
| Package | 28-pin TSSOP (PWP) PowerPAD™ |
Key Features
- Fixed output voltage of 1.5 V with 1.0% initial accuracy
- Internally compensated for easy use and minimal component count
- Fast transient response and wide PWM frequency range (fixed 350 kHz, 550 kHz or adjustable 280 kHz to 700 kHz)
- Load protected by peak current limit and thermal shutdown
- Integrated bootstrap switch and adaptive dead-time control to prevent shoot-through current
- Powergood output for processor/logic reset, fault signaling, and supply sequencing
- Internally and externally set slow-start circuit to limit in-rush currents
- Under-voltage-lockout circuit to prevent start-up until the input voltage reaches 3 V
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 TPS54613PWPG4?
The input voltage range is from 3 V to 6 V.
- What is the fixed output voltage of the TPS54613PWPG4?
The fixed output voltage is 1.5 V.
- What is the maximum output current of the TPS54613PWPG4?
The maximum output current is 6 A.
- What are the available PWM frequencies for the TPS54613PWPG4?
The available PWM frequencies are fixed at 350 kHz or 550 kHz, or adjustable from 280 kHz to 700 kHz.
- What protection features does the TPS54613PWPG4 have?
The device is protected by peak current limit and thermal shutdown.
- What is the purpose of the powergood output in the TPS54613PWPG4?
The powergood output is useful for processor/logic reset, fault signaling, and supply sequencing.
- How does the slow-start circuit function in the TPS54613PWPG4?
The slow-start circuit limits in-rush currents by linearly ramping up the reference voltage fed to the error amplifier.
- What is the thermal shutdown trip point for the TPS54613PWPG4?
The thermal shutdown trip point is between 135°C and 165°C.
- In what package is the TPS54613PWPG4 available?
The device is available in a 28-pin TSSOP (PWP) PowerPAD™ package.
- What are some typical applications of the TPS54613PWPG4?
Typical applications include low-voltage, high-density systems, point of load regulation for high-performance DSPs and FPGAs, and portable computing.
