TPS543320 Datasheet | Texas Instruments

Features - Fixed-frequency, internally-pensated advanced current mode (ACM) control - Integrated 25-mΩ and 13.9-mΩ MOSFETs - Input voltage range: 4 V to 18 V - Output voltage range: 0.5 V to 5.5 V - Three selectable PWM ramp options to optimize the control loop performance - Five selectable switching frequencies: 500 k Hz, 750 k Hz, 1 MHz, 1.5 MHz, and 2.2 MHz - Synchronizable to an external clock - 0.5-V, ±0.5% voltage reference accuracy over full temperature range - Selectable soft start times: 0.5 ms, 1 ms, 2 ms, and 4 ms - Monotonic start-up into pre-biased outputs - Selectable current limits to support 3-A and 2-A operation - Enable with adjustable input undervoltage lockout - Power good output monitor - Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection - Pin-to-pin patible with TPS543820 and TPS543620 - - 40°C to 150°C operating junction temperature - 2.5-mm × 3-mm, 14-pin VQFN-HR package with 0.5-mm pitch BOOT BP5 PGOOD SYNC/FSEL MODE AGND PGND VOUT Simplified Schematic 2 Applications - Wireless infrastructure and wired munications equipment - Optical and fiber networks - Test and measurement - Medical and healthcare 3 Description The TPS543320 is a high-efficiency 18-V, 3-A synchronous buck converter employing an internallypensated, fixed-frequency Advanced Current Mode control. It is capable of providing high efficiency while running at a switching frequency up to 2.2 MHz. The device is in a small 2.5-mm × 3-mm Hot Rod™ VQFN package, which coupled with high efficiency at high frequency, makes it optimal for designs requiring a small solution size. The fixed frequency controller can operate from 500 k Hz to 2.2 MHz and can be synchronized to an external clock using the SYNC pin. Additional features include a high accuracy voltage reference, selectable soft start times, montonic start-up into pre-biased outputs, selectable current limits, adjustable UVLO...