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	Cost Per Unit	Tooltip	Quantity Per Module	Cost Per Module
C1	UVR1H101MPD1TD	Nichicon	Cap Aluminum 100uF 50V 20% (8 X 11.5mm) Radial 3.5mm 260mA 2000 hr 85°C Ammo Pack	$0.0260	At qty. 500	1	$0.0260
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	$0.9100	At qty. 100	1	$0.9100
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	$0.1150	At qty. 50	1	$0.1150
D2	VLMTG1300-GS08	Vishay	Green 0603 130º Clear 450 mcd 3.2 V Surface Mount ChipLED	$0.2250	At qty. 400	1	$0.2250
L1	SRR1280-331K	Bourns	Inductor Power Shielded Wirewound 330uH 10% 1KHz 18Q-Factor Ferrite 1.1A 600mOhm DCR T/R	$0.2950	At qty. 50	1	$0.2950
P2	1546111-2	TE Connectivity	Conn Shrouded Header HDR 2 POS 5.08mm Solder ST Thru-Hole	$0.4848	At qty. 50	1	$0.4848
P2	TS02515A0000G	Amphenol Anytek	2 Position Terminal Block Plug, Female Sockets 0.200" (5.08mm) 90°	$0.5040	At qty. 50	1	$0.5040
R1	ERJ-3GEYJ271V	Panasonic	RES SMD 270 OHM 5% 1/10W 0603	$0.0025	At qty. 5000	1	$0.0025
U1	LM2575SX-3.3/NOPB	Texas Instruments	SIMPLE SWITCHER® 1A Step-Down Voltage Regulator, 5-pin TO-263, Pb-Free	$1.4900	At qty. 50	1	$1.4900
PCB + PCBA				$0.6000	At qty. 1500	1	$0.6000
MISC			Shipping, taxes and other fees	$0.4000	At qty. 1500	1	$0.4000
Hexabitz Markup			33.33%	$2.5262		1	$2.5262
Payment Processing Fees			3.00%	$0.2274		1	$0.2274
Total Retail Cost							$7.8058
Listed Retail Price							$7.9000
Item	MPN	MFN	Description	Cost Per Unit	Tooltip	Quantity Per Module	Cost 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