3.3V/1A DC-DC Power Supply (H03R0x)

Q: Q: How many Hexabitz modules I can power from a single H03R00?

A : Depends on type of modules connected, but usually 40+ modules can be powered from a single H03R00.

Q: Q: How can I access output voltage for non-Hexabitz hardware?

A : You can solder wires and many types of connectors to the SMD edge pads. Our favorite one is the 2-pin 2.54 mm male header which fits their perfectly, but many other connectors work fine as well.

Q: Q: Can I combine multiple H03R00 modules in parallel to get higher current?

A : Theoretically you can do that as the edge PCB connectors are perfect to connect modules in parallel. However, be careful, as sometimes small variations in output voltage might cause current to flow from one power supply to another. We will have in the future dedicated modules to handle load-sharing between power supplies!

Description

H03R0x is a compact DC-DC buck power supply with a 3.3V/1A DC output and 5-40V DC input. The output voltage is provided through Hexabitz SMD edge-pad connectors (3.3V on top and GND on bottom). The -T module version comes with a 5.08 mm terminal block connector for input voltage, while the -J comes with a DC power jack. Use this module to power all your Hexabitz creations (and other hardware) from a DC source (battery, AC/DC wall adapter, etc.)

Specifications

Technical Specifications

Input voltage: +5V to +40V DC.
Output voltage: +3.3V DC.
Output current: 1A.
Six output power ports (+3.3V and GND).
TI LM2575SX-3.3/NOPB high-efficiency, 1A, step-down, switching voltage regulator:
- 52 kHz Fixed Frequency Internal Oscillators.
- Thermal shutdown and current limit protection.
Green power-OK LED.
Input voltage connector: TE Connectivity/AMP 2-position 5.08 mm shrouded vertical or right-angle terminal block or CUI PJ-202A horizontal DC power jack.

Physical Properties

Shape: Hexagon
Size: 30 mm short diagonal
Area: 7.8 cm^2
Weight: 4 g
Soldermask Color: Dark green
Finish: ENIG (gold) or HASL-LF (tin)

Projects

Please visit this product projects on Hackster.io network.

BOM

H03R00-T BOM

Item	MPN	MFN	Description	Quantity Per Module
C1	UVR1H101MPD1TD	Nichicon	Cap Aluminum 100uF 50V 20% (8 X 11.5mm) Radial 3.5mm 260mA 2000 hr 85°C Ammo Pack	1
C2	6TPC330MA	Panasonic	Cap Tant Solid 330uF 6.3V D2 CASE 20% (7.3 X 4.3 X 1.9mm) SMD 7343,D2 0.04 Ohm 105Â°C Embossed T/R	1
D1	1N5819HW-7-F	Diodes Inc.	1.0 A Surface Mount Schottky Barrier Rectifier, 40 V, -65 to 125 degC, 2-Pin SOD-123 Package, RoHS, Tape and Reel	1
D2	VLMTG1300-GS08	Vishay	Green 0603 130º Clear 450 mcd 3.2 V Surface Mount ChipLED	1
L1	SRR1280-331K	Bourns	Inductor Power Shielded Wirewound 330uH 10% 1KHz 18Q-Factor Ferrite 1.1A 600mOhm DCR T/R	1
P2	1546111-2	TE Connectivity	Conn Shrouded Header HDR 2 POS 5.08mm Solder ST Thru-Hole	1
P2	TS02515A0000G	Amphenol Anytek	2 Position Terminal Block Plug, Female Sockets 0.200" (5.08mm) 90°	1
R1	ERJ-3GEYJ271V	Panasonic	RES SMD 270 OHM 5% 1/10W 0603	1
U1	LM2575SX-3.3/NOPB	Texas Instruments	SIMPLE SWITCHER® 1A Step-Down Voltage Regulator, 5-pin TO-263, Pb-Free	1
PCB + PCBA				1
Item	MPN	MFN	Description	Quantity Per Module

Quickstart Guide

Download a PDF version here.

FAQ

Frequently Asked Questions

Q: How many Hexabitz modules I can power from a single H03R00?

A: Depends on type of modules connected, but usually 40+ modules can be powered from a single H03R00.

Q: How can I access output voltage for non-Hexabitz hardware?

A: You can solder wires and many types of connectors to the SMD edge pads. Our favorite one is the 2-pin 2.54 mm male header which fits their perfectly, but many other connectors work fine as well.

Q: Can I combine multiple H03R00 modules in parallel to get higher current?

A: Theoretically you can do that as the edge PCB connectors are perfect to connect modules in parallel. However, be careful, as sometimes small variations in output voltage might cause current to flow from one power supply to another. We will have in the future dedicated modules to handle load-sharing between power supplies!

Have more questions? Please check our main FAQ page and feel free to contact us for any unanswered questions.

Factsheet