The TPS53321 device provides a fully integrated 3-V to 5-V VIN integrated synchronous FET converter solution with 16 total components in 200 mm2 of PCB area. Due to the low ON-resistance and TI’s Proprietary SmoothPWM™ skip mode of operation, it enables 96% peak efficiency and over 90% efficiency at loads as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power dense 5-A solution.
The TPS53321 features a 1.1-MHz switching frequency, skip mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections, and all ceramic output capacitor support. It supports supply voltage from 2.9 V to 3.5 V and conversion voltage from 2.9 V to 6 V. The output voltage is adjustable from 0.6 V to 0.84 V × VIN.
The TPS53321 is available in the 3 mm × 3 mm 16-pin QFN package (Green RoHs compliant and Pb free) and operates between –40°C and 85°C.
| Vin (min) (V) | 2.9 |
| Vin (max) (V) | 6 |
| Vout (min) (V) | 0.6 |
| Vout (max) (V) | 4.2 |
| Iout (max) (A) | 5 |
| Iq (typ) (mA) | 0.32 |
| Switching frequency (min) (kHz) | 1100 |
| Switching frequency (max) (kHz) | 1100 |
| Features | Enable, Frequency synchronization, Light load efficiency, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification |
| Operating temperature range (°C) | -40 to 85 |
| Rating | Catalog |
| Regulated outputs (#) | 1 |
| Control mode | Voltage mode |
| Duty cycle (max) (%) | 99 |
| Type | Converter |
| VQFN (RGT) | 16 | 9 mm² 3 x 3 |
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