Efficient and easy to use synchronous step-down converter

The Texas Instruments TPS62933 is an efficient, easy-to-use synchronous step-down converter with a wide input voltage range of 3.8 V to 30 V, continuous output current up to 3a, and output voltage range of 0.8 V to 22 V.

The device adopts fixed frequency peak current control mode, instantaneous response is fast, line and load regulation. Optimized internal loop compensation eliminates external compensation components in the range of output voltage and operating frequency. Pulse frequency modulation (PFM) mode maximizes light load efficiency. The ULQ(Ultra Low Silence) feature is very beneficial for long battery runs at low power.

Switching frequency can be set by configuring RT pins in the 200khz to 2.2 MHz range, which allows users to optimize system efficiency, solution size, and bandwidth. Soft start time can be adjusted by external capacitance on the SS pin, which minimizes inrush current when driving large capacitance loads. The device has spread spectrum characteristics, which helps to reduce electromagnetic interference noise.

TPS62933 offers complete protection, including OTP, OVP, UVLO, period-by-cycle OC limitation, and UVP with hiccup mode. The device is a small SOT583 (1.6mm x 2.1mm) package with 0.5mm pin spacing featuring optimized pins for easy PCB layout and promoting good EMI performance.

Features

● Configure for a wide range of applications
-   Input voltage range: 3.8V to 30v
-   Output voltage range: 0.8V ~ 22v
-   Continuous output current :3a
-   0.8V ±1% reference voltage (+25°C)
-   Working junction temperature range :-40°C ~ +150°C
-   Integrated mosfet: 76 mL and 32 mL
-   Ultra-low rest current: 12μA (typical)
-   Low Closing current: 2μA (typical)
-   Duty cycle operation :98%(Max)
-   Accuracy is at the threshold

● Easy to use, small solution volume:
-   Peak current control mode with internal compensation
-   PFM has high light load efficiency
-   Adjustable soft boot time
-   Optional frequency range :200 kHz to 2.2 MHz
-   EMI friendly frequency spread spectrum
-   Supports booting with prebiased output
-   Period-by-period OC limits of high - and low-side mosfeTs
-   Non-latch protection :OTP, OCP, OVP, UVP, UVLO
-   Packaging: 1.6mm × 2.1mm SOT58

Applications

● Building automation, electrical appliances and industrial personal computers
● Multifunctional printer and enterprise projector
● Portable electronic devices and connected peripherals
● Smart speaker and monitor
● Input 5v, 12v, 19v, 24v distributed power system