Texas Instruments TPS562231

Description

The TPS562231 is a single, adaptive on-time, D-CAP3™ mode, synchronous buck converter requiring a very low external component count. The proprietary D-CAP3 mode control supports low ESR output capacitors such as specialty polymer capacitors and multi-layer ceramic capacitors without complex external compensation circuits. The fast transient response of D-CAP3 mode control can reduce the output capacitance required to meet a specific level of performance. The switching frequency is internally set at a nominal 850 kHz and enters Advanced Eco-mode in light load conditions. The high-side and lowside switching MOSFETs are incorporated inside the TPS562231 package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS562231 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS562231 dc/dc synchronous converter is designed to provide up to a 2-A output from an input voltage source of 4.5 V to 17 V. The output voltage range is from 0.6 V to 7 V. Rated input voltage and output current ranges for the evaluation module are given in Table 1.The TPS562231EVM evaluation module (EVM) is a single, synchronous buck converter providing 3.3 V at 2 A from 4.5-V to 17-V input. This user’s guide describes the TPS562231EVM performance.

Features

• 2-A converter integrated 95-mΩ and 55-mΩ FETs
• D-CAP3™ Mode Control with fast transient response
• Input voltage range: 4.5 V to 17 V
• Output voltage range: 0.6 V to 7 V
• Pulse skip mode
• 850-kHz switching frequency
• Low shutdown current less than 2 µA (typical)
• 2% feedback voltage accuracy (25ºC)
• Startup from pre-biased output voltage
• Cycle-by-cycle over current limit
• Hiccup-mode over current protection
• Non-latch UVP and TSD protections
• 6-pin SOT563 package
• Precision enable
• Pin-to-pin compatible with TPS563231

Typical applications

More information

• Datasheet
• IC product information