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Diodes Incorporated ZSR330GTC
- Part No.:
- ZSR330GTC
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZSR330GTC.pdf
- Description:
- IC REG LINEAR 3.3V 200MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:2,575
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Product details
Overview
ZSR330GTC from Zetex Semiconductors is a fixed positive 3.3 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 (3.218–3.382 V), 350–600 µA quiescent current, and operates across –55°C to +125°C. Used in embedded microcontroller power rails where low-noise, stable local supply is critical.
For engineers reviewing the ZSR330GTC datasheet, ZSR330GTC pinout, ZSR330GTC application, or ZSR330GTC equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation guidance, and confirmed alternative options for 3.3 V local regulation in industrial and automotive-qualified systems.
Technical Context
The ZSR330GTC integrates internal current limiting and thermal shutdown circuitry, enabling robust operation under overload or fault conditions without external protection components. Its dropout voltage remains below 2.5 V across temperature and load, supporting reliable regulation even with marginal input margins.
It achieves 50–64 dB ripple rejection at 120 Hz and maintains output noise below 50 µVrms (10 Hz–10 Hz bandwidth), making it suitable for analog-sensitive subsystems. The device requires no external capacitors for stability and exhibits a low 0.1 mV/°C average temperature coefficient over –55°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal; 3.168–3.432 V over full load (1–200 mA) and input range (5.3–20 V), ensuring compatibility with 3.3 V logic I/O and core supplies. |
| Quiescent Current | 350–600 µA; enables ultra-low standby power in battery-backed or always-on systems without compromising regulation accuracy. |
| Line Regulation | 7.5–30 mV; minimal output shift when input varies from 5.3 V to 20 V-critical for systems powered by unregulated or fluctuating sources. |
| Load Regulation | 5–25 mV over 1–200 mA load; ensures stable voltage delivery across dynamic current demands, e.g., MCU sleep-to-active transitions. |
| Ripple Rejection | 50–64 dB at 120 Hz; suppresses AC ripple from switching pre-regulators or noisy DC sources, preserving signal integrity in mixed-signal circuits. |
| Operating Temperature | –55°C to +125°C; qualified for under-hood automotive, industrial control, and outdoor equipment environments without derating. |
| Package Power Dissipation | 2 W at 25°C ambient (SOT223 on 2″×2″ PCB); supports continuous 200 mA output at elevated ambient temperatures with appropriate layout. |
Pinout & Package
SOT223 package with exposed thermal pad (pin 4). Pin 4 must be connected to pin 2 (GND) or left electrically isolated per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage terminal | Accepts 5.3–20 V DC input; minimum 5 V required to maintain regulation at full load. |
| 2 (GND) | Ground reference | Common return path for input, output, and internal bias; connects to system ground plane for thermal and noise control. |
| 3 (OUT) | Regulated output | Delivers stable 3.3 V to load; no external capacitor needed for stability-reduces BOM count and board area. |
| 4 (Tab) | Thermal pad / optional GND | Exposed copper pad for heat dissipation; tied to pin 2 (GND) for optimal thermal performance and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internally compensated-eliminates need for output capacitor or feedback network, simplifying layout and improving reliability. |
| Tight initial tolerance (±2.5%) | Guarantees 3.3 V output stays within 3.168–3.432 V at power-up, avoiding brown-out resets in 3.3 V microcontrollers. |
| Internal thermal shutdown | Automatically disables output above safe junction temperature, preventing damage during sustained overload or poor heatsinking. |
| Short-circuit current limit | Clamps output current to safe level (~400 mA peak) during output faults, protecting both regulator and downstream circuitry. |
| Low noise (50 µVrms) | Minimizes interference in precision analog sections (e.g., ADC references, sensor front-ends) powered from same rail. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers and CAN transceiver bias rails in modular PLC backplanes. IC Role / Device Role / Timing Role: Local 3.3 V regulator supplying isolated logic-level translators and bus interface ICs. Use Value: Stable output under wide input variation (12–24 V DC bus) and high ambient temperature (up to 85°C), with no external compensation needed. |
Use Scenario: Providing clean 3.3 V supply to microcontroller peripherals (LIN transceivers, EEPROM, sensors) in door modules. IC Role / Device Role / Timing Role: Point-of-load regulator decoupling main 5 V or 12 V domain to meet automotive EMC and thermal requirements. Use Value: –40°C to +125°C operation, 64 dB ripple rejection, and integrated fault protection reduce need for external TVS or thermal monitoring. |
| Medical Patient Monitor Sensor Interface | Industrial Wireless Sensor Node |
|
Use Scenario: Regulating power for low-noise analog front-end amplifiers and 16-bit ADCs in bedside vital sign monitors. IC Role / Device Role / Timing Role: Low-noise local regulator feeding precision analog signal chain stages. Use Value: 50 µVrms output noise and 0.1 mV/°C tempco preserve measurement accuracy across clinical operating temperature range. |
Use Scenario: Supplying 3.3 V to ultra-low-power MCU, RF transceiver, and environmental sensors in battery-operated field nodes. IC Role / Device Role / Timing Role: Efficient local regulator minimizing quiescent draw while maintaining regulation during RF burst transmission. Use Value: 350 µA typical quiescent current extends battery life; 200 mA capability supports short-duration high-current events (e.g., LoRaWAN transmit). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.3 V linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM1117MPX-3.3/NOPB | Higher quiescent current (5–10 mA), wider output tolerance (±2%), requires 10 µF output capacitor for stability. | Lacks thermal shutdown flag; less robust in sustained overload scenarios common in industrial field devices. | Prefer ZSR330GTC where low IQ, capacitor-free operation, and integrated fault protection are mandatory. |
| MCP1700T-3302E/TT | Lower max output current (250 mA), tighter initial tolerance (±0.4%), but limited to 6 V max input and 125°C max junction temperature. | Not rated for automotive under-hood use due to lower max input voltage and narrower thermal margin. | Prefer ZSR330GTC for designs requiring >6 V input, extended temperature operation, or higher fault resilience. |
Compared with LM1117MPX-3.3/NOPB and MCP1700T-3302E/TT, the ZSR330GTC offers superior thermal robustness, lower quiescent consumption, and true capacitor-free stability-making it optimal for space-constrained, high-reliability local regulation where input voltage exceeds 6 V or ambient temperature exceeds 85°C.
Availability
ZSR330GTC is available at Aetrix Electronics and suitable for industrial PLCs, automotive body electronics, medical sensor interfaces, and wireless IoT nodes requiring stable component supply with long lifecycle assurance.
Supply support for ZSR330GTC 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 was a UK-based ISO 9001 and TS16949-certified manufacturer specializing in high-reliability analog and power semiconductors before its acquisition by Diodes Incorporated in 2008.
The ZSR Series was developed for rugged local voltage regulation in harsh environments-targeting automotive, industrial, and medical applications where thermal resilience, fault tolerance, and minimal external components were essential design goals.
FAQ
Is ZSR330GTC compatible with lead-free reflow soldering processes?
Yes. The SOT223 package is RoHS-compliant and qualified for standard lead-free reflow profiles (peak temperature ≤260°C, 60-second duration). Thermal pad (pin 4) must be properly soldered to PCB ground plane to ensure both thermal performance and mechanical reliability during thermal cycling.
Can ZSR330GTC operate with an input voltage of 4.5 V?
No. The minimum input voltage to maintain regulation is 5.0 V at full 200 mA load, per datasheet specification. At 4.5 V input, the device enters dropout and cannot sustain 3.3 V output-designs must ensure Vin ≥5.3 V across all operating conditions including line tolerance and ripple.
Does ZSR330GTC require an input bypass capacitor?
While not strictly required for stability, a 1 µF ceramic capacitor placed close to the IN pin is recommended to suppress high-frequency noise and prevent input transient-induced shutdown during thermal fault recovery, especially when sourced from inductive or switching supplies.
What is the maximum continuous output current at 105°C ambient temperature?
At 105°C ambient, the SOT223 package's power derating reduces maximum continuous output current to approximately 140 mA-calculated from 2 W max dissipation at 25°C, linearly derated to zero at 125°C, and accounting for 2.5 V typical dropout and 3.3 V output.
ZSR330GTC 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 600 µA
- Current - Supply (Max):
- -
- PSRR:
- 64dB (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
ZSR330GTC FAQ
1.How can I place an order for ZSR330GTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSR330GTC 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 ZSR330GTC reliable?
The price and inventory of ZSR330GTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSR330GTC is usually 5 days.
3.What payment methods are accepted for ZSR330GTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSR330GTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSR330GTC?
ZSR330GTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSR330GTC 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 ZSR330GTC?
For technical support, including ZSR330GTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSR330GTC requirements.
6.How does Aetrix verify that ZSR330GTC is sourced from the original manufacturer or authorized distributors?
All ZSR330GTC 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 ZSR330GTC meets industry standards.
7.What is the process for return or replacement of ZSR330GTC?
All ZSR330GTC units undergo pre-shipment inspection (PSI). If there is an issue with ZSR330GTC, 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 ZSR330GTC part is unused and in its original packaging.
Return procedure for ZSR330GTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZSR330GTC Tags
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TLV1117LV33DCYR
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