DCR010505U/1KE4 - 1W Isolated DC/DC Module 5V 200mA | Texas Instruments
MPN: DCR010505U/1KE4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
| 10 | $1 | $10.00 |
| 100 | $1 | $100.00 |
| 500 | $1 | $500.00 |
| 1,000 | $1 | $1,000.00 |
DCR010505U/1KE4 Overview
An isolated DC/DC converter is a power management module that transfers energy across a galvanic isolation barrier, breaking ground loops and protecting downstream circuitry from hazardous voltages. Within the power-conversion hierarchy - voltage regulator, then DC/DC converter, then isolated DC/DC module - the DCR01 family sits at the board-mount module level, integrating the transformer, switching stage, and regulation loop in one standard JEDEC outline suited to high-volume assembly.
Key features include 1000Vrms operational isolation (1-second test), a 400kHz switching frequency enabling a power density of 53 W/in3 (3.3 W/cm3), device-to-device synchronization for parallel or multi-channel designs, thermal protection, and short-circuit protection. The module is UL1950 recognized, and the isolation barrier is rated for 60 VDC / 42.5 VAC continuous working voltage.
Architecturally, the DCR01 series uses a high-frequency switching topology with an integrated isolation transformer and a regulation loop that holds the output within tight limits (approximately 4.9V to 5.1V per distributor parametric data), giving very low output noise compared with unregulated converter modules. The 125 FIT reliability figure supports long-life industrial designs.
Typical applications include isolated interface power for RS-485 and CAN transceivers, isolated analog front ends in industrial automation, and ground-loop elimination in test and measurement equipment.
A key design consideration: because this is a fixed 5V-input part, upstream rail tolerance must stay within the ±10% (4.5V to 5.5V) window; use the DCR012405 variant for 24V buses.
This page synthesizes distributor data, drop-in alternatives, and practical design notes beyond the manufacturer datasheet.
Drop-in alternatives for DCR010505U/1KE4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesDCR010505U/1KE4 Maximum Ratings & Electrical Characteristics
| Topology | Isolated, Regulated DC/DC Converter Module |
| Number of Outputs | 1 |
| Output Voltage | 5 V |
| Output Current | 200 mA |
| Output Power | 1 W |
| Output Voltage Range (Min-Max) | 4.9 V to 5.1 V |
| Input Voltage Range | 4.5 V to 5.5 V (±10% of 5 V nominal) |
| Isolation Voltage | 1000 Vrms (operational, 1-second test) |
| Continuous Working Isolation Voltage | 60 VDC / 42.5 VAC |
| Switching Frequency | 400 kHz |
| Power Density | 53 W/in3 (3.3 W/cm3) |
| Synchronization | Device-to-device synchronization |
| Protection Features | Thermal protection, short-circuit protection |
| Reliability | 125 FIT |
| Safety Recognition | UL1950 recognized |
| Package | 12-pin SOP (surface mount) |
| Width | 7.5 mm |
| Mounting Type | Surface Mount |
DCR010505U/1KE4 12-pin sop (surface mount) Pin Configuration Guide
Pin configuration for DCR010505U/1KE4 (12-pin sop (surface mount) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for DCR010505U/1KE4.
Refer to the datasheet for full pin configuration.
Typical Applications
DCR010505U/1KE4 is suitable for 6 applications: Isolated RS-485 / CAN Field Bus Interface, Isolated Analog Front End for Industrial Automation, Ground Loop Elimination in Test and Measurement Equipment, Isolated Power for Microcontroller IoT Nodes, Medical Equipment Auxiliary Isolated Rail, Isolated Gate Drive and Communications Bias Supply.
Isolated RS-485 / CAN Field Bus Interface
Industrial field buses such as RS-485 and CAN frequently require an isolated supply for the bus-side transceiver so that ground potential differences between nodes do not inject current into the data lines. The DCR010505U/1KE4 fits this role directly: its isolated 5V, 200mA output powers the transceiver and a digital isolator with margin, while the 1000Vrms barrier (60 VDC continuous working voltage) provides robust functional isolation. The 400kHz switching frequency and low output noise keep conducted emissions low with simple 10uF/0.1uF ceramic filtering, and short-circuit protection tolerates field wiring faults on the bus connector. Device-to-device synchronization lets multi-channel nodes run several modules without beat-frequency interference.
Recommended
Isolated Analog Front End for Industrial Automation
Precision analog front ends measuring 4-20mA loops, thermocouples, or strain gauges benefit from an isolated, low-noise supply rail so that ground noise from the controller side does not corrupt microvolt-level signals. The DCR010505U/1KE4 provides a regulated isolated 5V rail with very low output noise, a stated advantage of the DCR01 series per the TI datasheet, which preserves the noise floor of the ADC and front-end amplifier. Its 200mA capacity covers typical signal chains (ADC, amplifier, reference), and the 125 FIT reliability figure supports long service intervals in factory equipment. Thermal and short-circuit protection add robustness when sensor wiring is exposed on the factory floor.
Recommended
Ground Loop Elimination in Test and Measurement Equipment
Bench instruments, data acquisition modules, and probe front ends often connect to equipment at different ground potentials; an isolated supply breaks the resulting ground loop. The DCR010505U/1KE4 generates a clean isolated 5V domain from the instrument's internal 5V logic rail, allowing sensitive measurement circuitry to float relative to chassis ground. The 1000Vrms tested isolation provides margin for typical bench overvoltage events, while UL1950 recognition simplifies product safety documentation. With 53 W/in3 power density in a 7.5 mm wide 12-pin SOP, the module fits on dense DAQ boards, and its low output noise avoids adding ripple to the measurement path.
Recommended
Isolated Power for Microcontroller IoT Nodes
Industrial IoT nodes attached to powered machinery need isolation between the noisy machine-side supply and the node electronics. The DCR010505U/1KE4 accepts the controller's 5V rail and produces an isolated 5V output for the node's radio module, sensors, and MCU, breaking galvanic paths that would otherwise couple transients into the wireless section. The 200mA (1W) budget suits low-power radios and sensor suites, and the module's thermal protection tolerates dusty, high-ambient enclosures. Because the family also offers 12V and 24V input variants in the same footprint, platform designs can standardize the layout across different machine supply voltages with only a BOM change.
Recommended
Medical Equipment Auxiliary Isolated Rail
Non-patient-connected auxiliary circuits in medical devices - displays, communications interfaces, and logging electronics - often require an isolated supply referenced to the safety barrier. The DCR010505U/1KE4's UL1950 recognition and 1000Vrms tested isolation support such auxiliary isolation functions, delivering a regulated 5V, 200mA rail for interface circuitry. Its low output noise is valuable near analog sensing circuits, and the short-circuit protection prevents a single auxiliary fault from propagating into the main power system. Designers should verify the applicable medical isolation standard requirements for their specific end equipment, since this module provides functional isolation rather than a patient-connect rated reinforced barrier.
Recommended
Isolated Gate Drive and Communications Bias Supply
Power conversion systems such as motor drives and solar inverters need small isolated bias supplies for gate drivers and isolated communication links on the high-voltage side. The DCR010505U/1KE4 supplies a 5V isolated bias from the controller's 5V rail with 1000Vrms of tested isolation, adequate for many low-voltage drive sub-systems. The module's 400kHz fixed clock and synchronization pin allow multiple bias channels (high-side, low-side, communications) to run coherently, avoiding intermodulation noise. Its 1W capacity fits a gate-driver pair with modest switching frequency, and the short-circuit protection protects the bias rail if a driver output is damaged during development.
Recommended
Recommended Products Summary
Engineering reference data for DCR010505U/1KE4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DCR010505U | DCR010505U/1K | DCR010505UE4 | DCR012405U | DCR010503U |
|---|---|---|---|---|---|---|
| Package | 12-pin SOP | 12-pin SOP - same | 12-pin SOP - same | 12-pin SOP - same | 12-pin SOP - same | 12-pin SOP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 21.6 V to 26.4 V (24 V nominal) | 4.5 V to 5.5 V |
| Output Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 3.3 V |
| Output Current | 200 mA | 200 mA | 200 mA | 200 mA | 200 mA | 200 mA |
| Isolation | 1000 Vrms | 1000 Vrms | 1000 Vrms | 1000 Vrms | 1000 Vrms | 1000 Vrms |
| Switching Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Protection Features | Thermal + short-circuit | Thermal + short-circuit | Thermal + short-circuit | Thermal + short-circuit | Thermal + short-circuit | Thermal + short-circuit |
| Safety Recognition | UL1950 recognized | UL1950 recognized | UL1950 recognized | UL1950 recognized | UL1950 recognized | UL1950 recognized |
Key Differentiators
- Regulated output with low noise in a fixed footprint (vs DCR010503U)
- 5V input compatibility for logic-rail-powered designs (vs DCR012405U)
- UL1950 recognition and 125 FIT reliability data (vs DCR010505UE4)
- Device-to-device synchronization (vs Generic unregulated 1W isolated modules)
Design Notes
The DCR010505U/1KE4 is a fixed-input module: the primary rail must remain within 4.5V to 5.5V (±10% of 5V nominal). Regulated 5V logic rails typically comply, but rail sag under load or diode-OR drops can push the input below regulation. Verify worst-case input at maximum load and hot ambient. For 12V or 24V buses, switch to the corresponding DCR01 family input variant rather than adding a pre-regulator, preserving footprint and qualification.
Place a 10uF ceramic capacitor close to the primary-side VIN/GND pins and a 10uF ceramic plus 0.1uF combination close to the isolated output pins, per the datasheet application recommendations. Because the module switches at 400kHz, keep the primary and secondary grounds referenced only through the isolation barrier - never route a copper trace across the barrier region under the package, as this degrades the effective isolation and couples switching noise between domains.
The 400kHz switching fundamental and its harmonics appear on both input and output ripple spectra. If multiple DCR01 modules are used on one board, tie their synchronization pins together per the datasheet so all modules switch coherently; this prevents beat-frequency products in the low-frequency band that are harder to filter. Keep the isolation barrier area clear and route sensitive analog lines on the secondary side away from the transformer region of the package.
A frequent mistake is treating the module as an unregulated converter and omitting output verification. The DCR01 family is regulated (output approximately 4.9V to 5.1V per distributor parametric data), but only within its rated 200mA load and input window - below minimum load some isolated modules show output rise; check the datasheet minimum-load guidance. Also, 1000Vrms is an operational/test rating with 60 VDC continuous working voltage; do not specify this module for barrier applications requiring higher continuous working voltages.
Compliance Information
UL1950 recognized per TI datasheet. RoHS/REACH/lead-free status not stated in the verified web data snapshot - confirm on the TI product page before release.
