ET-P03
TPS63802 Buck-Boost 3.3 V
3.3 V 2 A from 1.8–5.5 V input
AED 39.00
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Overview
3.3 V 2 A from 1.8–5.5 V input
The ET-P03 is built around the TI TPS63802: 2A buck-boost, 11µA Iq, seamless buck/boost/buck-boost.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Flat 3.3 V from a LiPo
- Running from 2–3 AA cells
- ESP32 with Wi-Fi bursts
Key features
What makes it different
Regulator
TI TPS63802: 2A buck-boost, 11µA Iq, seamless buck/boost/buck-boost
Input
1.8V start, runs to 1.3V; 1S LiPo, 2–3× AA/NiMH, USB 5V
Output
3.28V (FB 10k/1.8k, VREF 0.5V)
Current
2A in buck; ~1A at 2.5V in (boost) — see datasheet curves
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Regulator | TI TPS63802: 2A buck-boost, 11µA Iq, seamless buck/boost/buck-boost |
|---|---|
| Input | 1.8V start, runs to 1.3V; 1S LiPo, 2–3× AA/NiMH, USB 5V |
| Output | 3.28V (FB 10k/1.8k, VREF 0.5V) |
| Current | 2A in buck; ~1A at 2.5V in (boost) — see datasheet curves |
| Size | 25.4 × 17.8 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 5-pin 2.54 mm header · JST PH 2P R/A SMD (LiPo) — Battery / input |
| Main IC | TPS63802DLAR (LCSC C2845237) |
| Revision | Rev A |
Performance
Output current vs input
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 1.8–5.5V (start ≥ 1.8V) |
| 2 | GND | Ground | Ground |
| 3 | EN | Control | Low = off (100k pull-up) |
| 4 | 3V3 | Power | 2A max (boost mode less) |
| 5 | PG | Output | Open-drain power-good |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-P03 TPS63802 Buck-Boost 3.3 V (assembled)
- 1 × 5-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, EN, 3V3, PG
Compare
Which regulator?
| TPS63802 Buck-Boost 3.3 V (this board)This board | ET-P04 TPS563201 5 V 3 A Step-Down | ET-P05 TPS61023 5 V Boost | ET-P10 Dual-Rail 5 V + 3.3 V Supply | |
|---|---|---|---|---|
| What it does | 3.3 V 2 A from 1.8–5.5 V input | 6.5–17 V in, 5 V 3 A out | 5 V 1 A from a single LiPo cell | 6–28 V in, 5 V 2 A + 3.3 V 600 mA, reverse protected |
| Interface | 1.8V start, runs to 1.3V; 1S LiPo, 2–3× AA/NiMH,… | 6.5–17V (12V adapters, 3S/4S LiPo up to 16.8V) | 1S LiPo / 2-3 AA; starts at 1.8V | 6–28V after SS34 (screw terminal); 12V / 24V… |
| Best for | Flat 3.3 V from a LiPo | 12 V to 5 V for Raspberry Pi | 5 V from a LiPo for NeoPixels | 12/24 V systems to 5 V and 3.3 V |
| Price | 39 AED | 29 AED | 15 AED | 49 AED |
Downloads
Documents and design files
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