# TPS63802 3.3V Buck-Boost Regulator 6248 ## Description Single-subsystem 3.3 V synchronous buck-boost regulator reference built around the TI TPS63802DLAR in a 10-pin VSON package. The design accepts a VBUS input rail into VIN, uses a Bourns SRP4020TA-4R7M 4.7 µH power inductor between L1/L2, and generates PP3V3 from the adjustable TPS63802 output path. The TPS63802 metadata lists a 1.3 V to 5.5 V input range, 2 A output current, selectable switching-frequency modes around 1.4 MHz to 2.1 MHz, and -40 °C to +125 °C junction operation. Support circuitry includes 22 µF and 1 µF ceramic input/output capacitors, a 511 kΩ / 91 kΩ feedback divider for the PP3V3_FB node, a VBUS-derived enable divider using 93.1 kΩ and 100 kΩ resistors, MODE tied to GND, and a 100 kΩ pull-up from PP3V3 to the power-good output. Intended as a reusable compact 3.3 V buck-boost power-supply module for USB, battery, portable, IoT, or embedded sensor designs. ## Project Details - **Owner:** ryanf - **Created:** 7/22/2026 - **Last Updated:** 7/23/2026 - **Visibility:** Public - **License:** https://creativecommons.org/publicdomain/zero/1.0/ ## Key Components ### U1 — [TPS63802DLAR](https://www.flux.ai/lcsc/tps63802dlar~f4j8.md) - Operating Temperature: -40℃~+125℃@(TJ) - Part Type: DC-DC Converters - LCSC Part Number: C2845237 - Package or Case Code: VSON-10_L3.0-W2.0-P0.50-TL - Manufacturer Name: TI(德州仪器) - Symbol Style: parametric-v1 - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps63802.pdf - Manufacturer Part Number: TPS63802DLAR - Max Input Voltage: 1.3~5.5V - Output Current: 2A - Frequency: 2.1MHz;1.4MHz;1.6MHz - JLCPCB Part Class: Extended Part **Pins:** - AGND [pin 3] - EN [pin 1] - FB [pin 4] - GND [pin 8] - L1 [pin 9] - L2 [pin 7] - MODE [pin 2] - PG [pin 5] - VIN [pin 10] - VOUT [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ryanf/tps63802-3p3v-buck-boost-regulator-6248~ps4](https://www.flux.ai/ryanf/tps63802-3p3v-buck-boost-regulator-6248~ps4).* --- *Generated from [https://www.flux.ai/ryanf/tps63802-3p3v-buck-boost-regulator-6248~ps4](https://www.flux.ai/ryanf/tps63802-3p3v-buck-boost-regulator-6248~ps4)*