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Diodes Incorporated ZMR500FTA
- Part No.:
- ZMR500FTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZMR500FTA.pdf
- Description:
- IC REG LINEAR 5V 50MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,609
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Product details
Overview
ZMR500FTA from Diodes Incorporated is a fixed 5.0 V, low-quiescent-current (50–70 µA) positive voltage regulator in SOT23 package, delivering up to 50 mA output current with input voltage range of 7.0 V to 25 V, ±1.25% initial output accuracy, and 55–72 dB ripple rejection at 120 Hz - used for local low-current power supply in microcontroller subsystems.
For engineers reviewing the ZMR500FTA datasheet, ZMR500FTA pinout, ZMR500FTA application, or ZMR500FTA equivalent, key selection criteria include dropout behavior at 50 mA, thermal shutdown integrity under 125°C ambient, load/line regulation stability across industrial temperature range (−55°C to +125°C), and SOT23 PCB footprint compatibility with space-constrained consumer electronics designs.
Technical Context
The ZMR500FTA implements a monolithic IC-based linear regulator architecture with internal current limiting and thermal shutdown circuitry, enabling robust operation without external protection components. Its unconditionally stable design requires no output capacitor for stability, supporting ceramic capacitors as low as 1 µF.
It operates as a three-terminal device (IN, OUT, GND) with fixed 5.0 V output referenced to ground, optimized for low-noise (90 µVrms, 10 Hz–10 kHz) and high PSRR performance in battery-powered or noise-sensitive signal-chain subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.785–5.125 V (±1.25% at 25°C, 10 mA); maintains regulation over −55°C to +125°C |
| Input Voltage Range | 7.0 V to 25 V - supports wide-input industrial and automotive-supply rails |
| Max Output Current | 50 mA - sufficient for MCU core logic, sensors, or interface IC biasing |
| Quiescent Current | 50–70 µA - enables >1-year battery life in always-on IoT sensor nodes |
| Ripple Rejection | 55–72 dB at 120 Hz - suppresses AC line noise in offline SMPS-derived supplies |
| Line Regulation | 5–15 mV - ensures <0.3% output variation across full input range |
| Load Regulation | 15–40 mV (0–50 mA) - maintains tight voltage control during dynamic load steps |
Pinout & Package
Package: SOT23-3 (JEDEC TO-236AB), surface-mount, 2.9 mm × 1.3 mm × 1.0 mm body, 0.95 mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply Terminal | Accepts 7–25 V DC; must be decoupled locally to minimize transient-induced dropout |
| 2 (GND) | Ground Reference | Common return path for regulator feedback and load current; requires low-impedance PCB connection |
| 3 (OUT) | Regulated Output | Delivers stable 5.0 V to load; supports optional 1–10 µF ceramic output capacitor for improved transient response |
Key Features
| Feature | Design Value |
|---|---|
| Unconditionally Stable | No minimum ESR or capacitance required - simplifies layout and reduces BOM count |
| Internal Thermal Shutdown | Activates at ~125°C junction temperature - prevents damage during sustained overload or poor heatsinking |
| Short-Circuit Current Limit | Clamps output current to safe level (~100 mA peak) - protects device and upstream supply |
| Low Noise Output | 90 µVrms (10 Hz–10 kHz) - suitable for analog front-ends and precision ADC reference supplies |
| Wide Temperature Range | Specified from −55°C to +125°C - qualified for industrial and extended-temperature embedded systems |
Applications
| Smart Home Sensor Node | DVD/Blu-ray Player Logic Supply |
|---|---|
|
Use Scenario: Powering ultra-low-power MCU, RF transceiver, and environmental sensor in battery-operated smart thermostat. IC Role / Device Role / Timing Role: Local 5 V LDO supplying MCU I/O and sensor bias; not involved in timing generation. Use Value: 50 µA quiescent current extends coin-cell lifetime beyond 18 months; 50 mA headroom supports brief BLE transmission bursts. |
Use Scenario: Providing clean 5 V rail to DVD player's servo controller ASIC and IR receiver. IC Role / Device Role / Timing Role: Fixed-output voltage regulator for digital logic subsystem; decouples noisy motor drivers from sensitive control ICs. Use Value: 72 dB ripple rejection suppresses switching noise from spindle motor SMPS, preventing servo jitter and read errors. |
| Industrial HMI Display Backlight Driver Bias | Set-Top Box USB Peripheral Port Regulator |
|
Use Scenario: Generating stable 5 V for LED driver IC bias in panel-mounted human-machine interface display. IC Role / Device Role / Timing Role: Low-noise local regulator isolating backlight control circuitry from main 12 V system rail. Use Value: 90 µVrms output noise prevents visible flicker in PWM-dimmed LED backlights under variable load conditions. |
Use Scenario: Supplying 5 V to USB 2.0 hub controller and connected peripherals (keyboard, remote) in cable set-top box. IC Role / Device Role / Timing Role: Standalone 5 V regulator feeding USB VBUS path; independent of main SoC power domain. Use Value: 25 V max input withstands transient surges on 12 V board-level supply; thermal shutdown prevents latch-up during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/TT (Microchip) | Lower quiescent current (1.6 µA), but only 250 mA max output; 6 V max input; tighter initial tolerance (±0.4%) | Preferred for energy-harvesting or multi-year battery apps; unsuitable for 25 V input or >50 mA loads | Select when ultra-low IQ dominates; verify input voltage margin and thermal limits for 50 mA continuous load |
| AP2202K-5.0TRG1 (Diodes Inc.) | Same SOT23-3 package, 5 V output, but higher IQ (120 µA), lower PSRR (45 dB), and 100 mA output capability | Better for higher-current loads; less effective in noise-sensitive analog sections due to lower PSRR | Choose when load exceeds 50 mA but noise immunity is secondary; shares same footprint for drop-in evaluation |
Compared with MCP1700T-5002E/TT, ZMR500FTA trades ultra-low IQ for wider input range and higher surge tolerance; versus AP2202K-5.0TRG1, it delivers superior noise suppression and lower operating current at the cost of reduced output drive - making it optimal for noise-critical, medium-current, wide-input industrial subsystems.
Availability
ZMR500FTA is available at Aetrix Electronics and suitable for smart home sensor nodes, DVD/Blu-ray player logic supplies, and industrial HMI display biasing requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ZMR500FTA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized power management and signal integrity solutions for industrial, consumer, and computing markets.
The ZMR series was designed specifically for space-constrained, low-power applications requiring stable fixed-voltage regulation without external compensation - targeting consumer electronics, optical storage, and embedded microcontroller auxiliary supplies.
FAQ
What is the minimum input voltage required for ZMR500FTA to maintain regulation?
The ZMR500FTA requires a minimum input voltage of 6.2 V to sustain 5.0 V output regulation at full 50 mA load and 25°C ambient, per datasheet Section "Electrical Characteristics". This dropout voltage increases with temperature and load current; at 125°C junction temperature and 50 mA, dropout rises to approximately 1.5 V, requiring ≥6.5 V input.
Can ZMR500FTA operate without an output capacitor?
Yes - the ZMR500FTA is unconditionally stable and does not require an output capacitor for basic operation. However, adding a 1–10 µF ceramic capacitor at the output improves transient response and reduces output impedance above 10 kHz, especially under fast load-step conditions typical in microcontroller I/O switching.
Is ZMR500FTA pin-compatible with ZMR50HFTA?
Yes - ZMR500FTA replaces the obsolete ZMR50HFTA in the same SOT23-3 package with identical pinout (IN-GND-OUT), identical marking location, and fully compatible footprint and solder profile. The ZMR500FTA offers improved input voltage rating (25 V vs. previous 22.5 V) and updated thermal performance specifications.
Does ZMR500FTA support operation at −55°C?
Yes - the ZMR500FTA is fully specified and tested from −55°C to +125°C ambient temperature. Output voltage accuracy, line/load regulation, and quiescent current remain within datasheet limits across this full industrial temperature range, with no derating required for functionality - though power dissipation must be thermally managed per the SOT23 derating curve.
ZMR500FTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 70 µA
- Current - Supply (Max):
- -
- PSRR:
- 72dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZMR500FTA FAQ
1.How can I place an order for ZMR500FTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMR500FTA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZMR500FTA reliable?
The price and inventory of ZMR500FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR500FTA is usually 5 days.
3.What payment methods are accepted for ZMR500FTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR500FTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMR500FTA?
ZMR500FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMR500FTA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZMR500FTA?
For technical support, including ZMR500FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR500FTA requirements.
6.How does Aetrix verify that ZMR500FTA is sourced from the original manufacturer or authorized distributors?
All ZMR500FTA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZMR500FTA meets industry standards.
7.What is the process for return or replacement of ZMR500FTA?
All ZMR500FTA units undergo pre-shipment inspection (PSI). If there is an issue with ZMR500FTA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZMR500FTA part is unused and in its original packaging.
Return procedure for ZMR500FTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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