R-78B3.3-1.0 RECOM Power Power Supply (Other) In Stock
RECOM Power R-78B3.3-1.0 is a non-isolated DC-DC regulated power supply module in a SIP-3 package, converting 4.75 V to 32 V input to a regulated 3.3 V output at up to 1 A with 86% efficiency for embedded power designs.
- Manufacturer
- RECOM Power
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- R-78B3.3-1.0 Datasheet PDF
- Category
- Power Supply
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide input range of 4.75 V to 32 V supporting diverse power sources including unregulated supplies
- 3.3 V regulated output at up to 1 A with 86% conversion efficiency
- Line regulation of 0.4% and load regulation of 0.6% ensuring stable output under varying conditions
- Compact SIP-3 package for drop-in LDO replacement reducing heat dissipation
Applications
The R-78B3.3-1.0 is a pin-compatible switching replacement for 3.3 V linear regulators in industrial control boards, IoT gateways, and embedded computing modules where thermal efficiency is critical. Its 4.75 V to 32 V input range makes it suitable for powering 3.3 V logic from battery packs, automotive 12 V rails, or 24 V industrial buses. The high 86% efficiency and compact SIP-3 footprint enable low-profile, low-heat power supply designs without heat sinks.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 6 |
| Analog IC - Other Type | DC-DC REGULATED POWER SUPPLY MODULE |
| Approvals | EN |
| Efficiency (Main Output) | 86% |
| Input Voltage-Max | 32V |
| Input Voltage-Min | 4.75V |
| JESD-30 Code | R-PSMA-T3 |
| Line Regulation-Max | 0.4% |
| Load Regulation-Max | 0.6% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 1A |
| Output Voltage-Max | 3.399V |
| Output Voltage-Min | 3.201V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3.08 |
| Package Shape | RECTANGULAR |
| Package Style | MICROELECTRONIC ASSEMBLY |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Ripple Voltage (Main Out) | 0.0053Vrms |
| Surface Mount | NO |
| Switching Frequency-Max | 380kHz |
| Technology | HYBRID |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Total Power Output-Max | 3.3W |
| Trim/Adjustable Output | NO |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | Mainland China, Taiwan |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for R-78B3.3-1.0:
suggested
suggested
suggested
Frequently Asked Questions
How does the R-78B3.3-1.0 compare to a linear regulator when powering 3.3 V logic from a 12 V industrial rail?
Replacing a linear regulator with the R-78B3.3-1.0 in a 12 V to 3.3 V conversion at 1 A reduces power dissipation from approximately 8.7 W to about 1.4 W, thanks to 86% efficiency. The switching module eliminates the need for heat sinks, shrinks thermal design effort, and extends system reliability in industrial control panels and embedded boards.
What input voltage range does the R-78B3.3-1.0 support, and which power source configurations are compatible?
The R-78B3.3-1.0 accepts input voltages from 4.75 V to 32 V, covering single-cell Li-ion batteries around 4.2 V at minimum, standard 5 V USB rails, 12 V automotive or industrial supplies, and 24 V DC bus systems. This wide range makes the module versatile across battery-powered IoT devices, automotive electronics, and 24 V industrial automation equipment.
How stable is the 3.3 V output of the R-78B3.3-1.0 under load and line variations in real applications?
The R-78B3.3-1.0 maintains output stability with a line regulation of 0.4% maximum and load regulation of 0.6% maximum across its full 1 A output current range. These tight regulation figures ensure the 3.3 V rail remains within acceptable limits for microcontrollers, FPGAs, and RF modules even when the input voltage swings between 4.75 V and 32 V or load current changes rapidly.
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