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Diodes Incorporated ZSR500GTC
- Part No.:
- ZSR500GTC
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZSR500GTC.pdf
- Description:
- IC REG LINEAR 5V 200MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:4,003
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Product details
Overview
ZSR500GTC from Zetex Semiconductors is a fixed positive 5.0 V linear voltage regulator in SOT223 package, designed for local regulation in space-constrained PCBs. It delivers up to 200 mA output current with ±2.5% initial output voltage tolerance (4.875–5.126 V), 350–600 µA quiescent current, and operates across –55°C to +125°C. It is used in embedded microcontroller power rails where low-noise, stable local supply and thermal robustness are critical.
For engineers reviewing the ZSR500GTC datasheet, ZSR500GTC pinout, ZSR500GTC application, or ZSR500GTC equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation guidance, and confirmed alternative options with documented functional trade-offs.
Technical Context
The ZSR500GTC integrates internal current limiting and thermal shutdown circuitry, enabling self-protection during overload or fault conditions without external components. Its dropout voltage remains below 2.5 V across temperature and load, with typical drop-out at 100 mA being ~1.0 V at 25°C.
It achieves 48–62 dB ripple rejection at 120 Hz with input voltage range of 7–20 V, and maintains output voltage stability over ±0.1 mV/°C average temperature coefficient. Output noise is specified at 75 µVrms (10 Hz–10 Hz bandwidth), supporting analog-sensitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal; 4.875–5.126 V over full load (1–200 mA) and temperature (–55°C to +125°C) |
| Output Current | Up to 200 mA continuous; peak short-circuit current >400 mA at 25°C |
| Quiescent Current | 350–600 µA; enables ultra-low standby power in battery-backed systems |
| Input Voltage Range | 7–20 V; minimum 7 V required to maintain regulation at full load |
| Ripple Rejection | 48–62 dB at 120 Hz; suppresses AC line noise on input supply feeding sensitive analog circuits |
| Thermal Shutdown | Activates above design junction limit; protects device during sustained overload or poor heatsinking |
| Package Power Dissipation | 2 W at 25°C ambient (derated linearly to 0 W at 125°C); requires 2-inch² copper area for full rating |
Pinout & Package
SOT223 package with exposed thermal pad (pin 4), rated for 2 W dissipation at 25°C ambient when mounted on 2-inch² PCB copper area. Pin 4 is electrically isolated or connected to pin 2 (GND) per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage terminal | Accepts 7–20 V DC; must be bypassed with ≥1 µF capacitor to prevent overshoot during thermal shutdown |
| 2 (GND) | Ground reference | Common return path for input, output, and internal bias; connects to thermal pad if used for heatsinking |
| 3 (OUT) | Regulated output | Delivers stable 5.0 V to load; requires local 1–10 µF ceramic output capacitor for stability |
| 4 (Tab) | Thermal pad / optional GND | Not electrically connected internally; may be soldered to PCB ground plane to improve thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Fully stable with only input/output capacitors; eliminates BOM cost and layout complexity of compensation networks |
| Tight initial tolerance (±2.5%) | Reduces need for post-production calibration in precision 5 V logic or ADC reference applications |
| Low quiescent current (350–600 µA) | Extends battery life in always-on sensor nodes and portable instrumentation operating from coin cells or Li-ion |
| Wide operating temperature (–55°C to +125°C) | Supports under-hood automotive modules, industrial PLC I/O, and outdoor telecom equipment without derating |
| Internal short-circuit and thermal protection | Enables robust operation in unattended systems-no external foldback or shutdown logic needed |
Applications
| Industrial Sensor Node Power | Microcontroller Core Supply |
|---|---|
Use Scenario: Local 5 V rail for MEMS pressure sensor, signal conditioner, and low-power MCU in factory-floor wireless node. IC Role / Device Role / Timing Role: Primary local regulator delivering clean, stable 5 V to analog front-end and digital core. Use Value: 75 µVrms output noise and 62 dB ripple rejection preserve sensor SNR; thermal shutdown prevents field failure during ambient temperature spikes. |
Use Scenario: Dedicated 5 V supply for ARM Cortex-M0+ MCU and its peripheral I/O in a programmable logic controller module. IC Role / Device Role / Timing Role: Fixed-output LDO providing regulated VDD for digital logic and internal PLL clock generation. Use Value: ±2.5% output tolerance ensures reliable boot and flash programming; 200 mA capacity supports burst-mode USB or CAN transceiver activation. |
| Automotive Body Control Module | Medical Diagnostic Handheld |
Use Scenario: Local 5 V supply for door lock actuator driver ICs and LIN transceivers in BCM subassembly. IC Role / Device Role / Timing Role: Fault-tolerant regulator handling load dump transients via input capacitor buffering and thermal shutdown. Use Value: –55°C to +125°C rating meets AEC-Q100 Grade 2; 2 W package dissipation supports compact enclosure without forced air cooling. |
Use Scenario: Battery-powered handheld ECG monitor requiring low-noise 5 V for op-amp front-end and display backlight driver. IC Role / Device Role / Timing Role: Low-quiescent, low-noise regulator powering analog signal chain and segmented LCD controller. Use Value: 350 µA quiescent current extends single-charge runtime; 48 dB ripple rejection prevents 120 Hz hum from appearing in ECG waveform. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM78L05ACZ/NOPB | TO-92 package; 100 mA max output; higher quiescent current (5.5 mA typ); no thermal shutdown | Limited to low-power, non-fault-prone applications; unsuitable for high-temp or unattended use | Select only if TO-92 footprint is mandatory and thermal/overload protection is externally managed |
| MCP1700T-5002E/TT | SOT23-5 package; 250 mA output; 1.6 µA quiescent current; 350 mV dropout; no internal current limit | Better for ultra-low-power sleep modes but lacks short-circuit protection and thermal shutdown | Prefer for battery longevity in intermittent-use devices; avoid where sustained overload risk exists |
Compared with LM78L05ACZ/NOPB, ZSR500GTC offers 2× output current, 15× lower quiescent current, and integrated protection-critical for ruggedized designs. Versus MCP1700T-5002E/TT, it trades ultra-low IQ for robust fault handling, making it preferable in industrial environments with variable load profiles.
Availability
ZSR500GTC is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, medical handheld diagnostics, and embedded microcontroller power rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZSR500GTC 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
Zetex Semiconductors plc (now part of Diodes Incorporated) was a UK-based ISO 9001 and TS16949 certified manufacturer specializing in high-reliability analog and power semiconductors.
The ZSR Series was developed for space-constrained, thermally demanding local regulation tasks-emphasizing fault resilience, wide temperature operation, and minimal external component count in industrial and automotive subsystems.
FAQ
What is the minimum input voltage required for ZSR500GTC to maintain regulation at full 200 mA load?
The datasheet specifies a minimum input voltage of 7 V to maintain 5.0 V output regulation at 200 mA load and 25°C ambient. At higher temperatures or with reduced PCB copper area, the effective minimum rises due to thermal derating-designers should verify junction temperature using θJA = 62.5°C/W (SOT223, 2-inch² copper) and ensure TJ stays below 150°C.
Can ZSR500GTC be used in parallel to increase output current?
No-ZSR500GTC is not designed for parallel operation. Its output voltage tolerance (±2.5%) and lack of current-sharing features mean mismatched units would cause one device to dominate conduction, leading to thermal runaway. For >200 mA, select a higher-current regulator or redesign the power architecture with discrete pass elements.
Is the thermal pad (pin 4) electrically connected internally?
No-the SOT223 thermal pad (pin 4) is electrically isolated from all internal circuitry. It may be left floating or connected to PCB ground plane to improve thermal performance. When soldered to ground, it enhances heat transfer but introduces no electrical function beyond thermal conduction.
Does ZSR500GTC require an input bypass capacitor, and if so, what value?
Yes-a minimum 1 µF ceramic capacitor is recommended at the input to suppress voltage transients during thermal shutdown events, especially when powered from inductive sources. Larger values (e.g., 10 µF) further reduce ripple and improve transient response, but the device remains stable without external compensation components.
ZSR500GTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 600 µA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
ZSR500GTC FAQ
1.How can I place an order for ZSR500GTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSR500GTC 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 ZSR500GTC reliable?
The price and inventory of ZSR500GTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSR500GTC is usually 5 days.
3.What payment methods are accepted for ZSR500GTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSR500GTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSR500GTC?
ZSR500GTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSR500GTC 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 ZSR500GTC?
For technical support, including ZSR500GTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSR500GTC requirements.
6.How does Aetrix verify that ZSR500GTC is sourced from the original manufacturer or authorized distributors?
All ZSR500GTC 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 ZSR500GTC meets industry standards.
7.What is the process for return or replacement of ZSR500GTC?
All ZSR500GTC units undergo pre-shipment inspection (PSI). If there is an issue with ZSR500GTC, 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 ZSR500GTC part is unused and in its original packaging.
Return procedure for ZSR500GTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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