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Diodes Incorporated ZSR1200GTA
- Part No.:
- ZSR1200GTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZSR1200GTA.pdf
- Description:
- IC REG LINEAR 12V 200MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:2,881
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Product details
Overview
ZSR1200GTA from Zetex plc is a fixed positive 12 V local voltage regulator in SOT223 package, delivering up to 200 mA output current with ±2.5% initial output voltage tolerance (11.7–12.3 V), 350 µA typical quiescent current, and internal thermal shutdown and short-circuit current limiting-used for point-of-load regulation in industrial power supplies and embedded control modules.
For engineers reviewing the ZSR1200GTA datasheet, ZSR1200GTA pinout, ZSR1200GTA application, or ZSR1200GTA equivalent, key selection criteria include dropout voltage (1.7 V min at 100 mA), ripple rejection (43–57 dB at 120 Hz), load/line regulation performance, thermal resistance (40 °C/W for SOT223), and compatibility with no-output-capacitor operation.
Technical Context
The ZSR1200GTA employs a monolithic bipolar linear regulator architecture with built-in current-limiting transistor and thermal foldback circuitry. It operates without external compensation components and maintains regulation across –55 °C to +125 °C ambient temperature.
Its input voltage range is 14–20 V (min 13.7 V to sustain 12 V output), with line regulation of 12–40 mV and load regulation of 9–30 mV over 1–200 mA. Output noise is specified at 150 µVrms (10 Hz–10 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12.0 V nominal (11.7–12.3 V min/max); stable under 1–200 mA load and 14–20 V input. |
| Output Current | Up to 200 mA continuous; peak short-circuit current drops with temperature (e.g., ~200 mA at 125 °C). |
| Quiescent Current | 350 µA typical; enables low-power standby operation without compromising regulation stability. |
| Line Regulation | 12 mV typical (40 mV max); ensures <±0.1% output shift per 1 V input change within operating range. |
| Load Regulation | 9 mV typical (30 mV max); holds output within ±0.075% across full 200 mA load swing. |
| Ripple Rejection | 43 dB min (57 dB typ) at 120 Hz; suppresses AC ripple from unregulated DC sources like rectified mains. |
| Thermal Resistance | 40 °C/W (SOT223 on 2″×2″ PCB); supports 2 W max power dissipation at 25 °C ambient, derated linearly to zero at 125 °C. |
Pinout & Package
SOT223 package (suffix G): 4-pin thermally enhanced surface-mount outline with exposed thermal pad (pin 4). Pin 4 is internally connected to the die substrate and must be electrically tied to ground or left floating per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Input) | Voltage input terminal | Accepts 14–20 V DC; requires ≥1 µF input capacitor if inductive source present to limit transient overshoot during thermal shutdown. |
| Pin 2 (Ground) | Reference and return path | Common reference for regulation loop and thermal sensing; must be low-impedance connection to minimize noise coupling. |
| Pin 3 (Output) | Regulated 12 V output | Delivers stable 12 V to load; no external capacitor required for stability, though optional 1–10 µF improves transient response. |
| Pin 4 (Thermal Pad) | Die substrate connection | Not electrically active by default; recommended to connect to ground plane for optimal thermal performance (40 °C/W rating assumes this). |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Fully compensated internal design eliminates need for external capacitors or resistors-reduces BOM count and board area. |
| Internal thermal shutdown | Activates at junction temperature >150 °C (typical), protecting device during overload or poor heatsinking conditions. |
| Internal short-circuit current limit | Clamps output current to ~200–500 mA depending on temperature; prevents damage during sustained output faults. |
| Wide operating temperature range | –55 °C to +125 °C ambient; validated for use in automotive under-hood, industrial PLC, and outdoor telecom equipment. |
| Low output noise | 150 µVrms (10 Hz–10 kHz); suitable for noise-sensitive analog circuits like ADC references and sensor signal chains. |
Applications
| Industrial Power Distribution | Embedded Control Module Supply |
|---|---|
Use Scenario: Local 12 V rail generation for microcontroller I/O peripherals and isolated CAN transceivers in programmable logic controllers. IC Role / Device Role / Timing Role: Fixed-output linear regulator providing clean, low-noise 12 V supply independent of main system rail fluctuations. Use Value: Eliminates need for remote regulation and long trace routing; maintains <±0.1% output accuracy despite 40 mV line/load variation. |
Use Scenario: Point-of-load regulation for FPGA configuration memory and level-shifting buffers in edge AI gateways. IC Role / Device Role / Timing Role: Local voltage source ensuring stable 12 V for interface ICs requiring tight supply tolerance and low EMI. Use Value: 150 µVrms noise and 57 dB ripple rejection prevent bit errors in high-speed serial links (e.g., RS-485, LVDS). |
| Automotive Body Control Unit | Test & Measurement Instrumentation |
Use Scenario: Powering window motor drivers and LED status indicators in BCM modules subjected to cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Robust local regulator with thermal foldback and current limiting to survive intermittent shorts and thermal stress. Use Value: Internal protection eliminates need for external fuses or resettable PTCs; operates continuously from –40 °C to +105 °C. |
Use Scenario: Bias supply for precision op-amps and DACs in portable multimeters and calibration equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise 12 V reference source with 0.25 mV/°C tempco supporting sub-mV accuracy. Use Value: 0.25 mV/°C average temperature coefficient ensures <±3 mV drift over –25 °C to +75 °C operating range. |
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 |
|---|---|---|---|
| TL78L12ACD | Higher quiescent current (4.5 mA typ), lower max output current (100 mA), SOIC-8 only. | Limited to low-current, non-thermal-critical designs; lacks SOT223 thermal performance. | Choose when board space allows SOIC-8 and thermal load is minimal (<0.5 W). |
| LM2931Z-12 | Lower dropout (0.6 V typ), wider input range (up to 40 V), but higher noise (200 µVrms) and no thermal shutdown. | Better suited for battery-powered systems with variable input; less robust in fault-prone environments. | Prefer where input voltage may dip near 12 V or where extended input range outweighs protection needs. |
Compared with TL78L12ACD and LM2931Z-12, the ZSR1200GTA offers superior thermal resilience (40 °C/W vs. >65 °C/W), lower quiescent current (350 µA vs. 4.5 mA), and integrated fault protection-making it optimal for compact, high-reliability 12 V local regulation where board real estate and thermal management are constrained.
Availability
ZSR1200GTA is available at Aetrix Electronics and suitable for industrial power distribution, embedded control module supply, automotive body control units, and test & measurement instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for ZSR1200GTA 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 plc (now part of Diodes Incorporated) is a UK-based semiconductor company specializing in high-performance analog and power management ICs for industrial, automotive, and communications markets.
The ZSR Series was designed specifically for rugged, space-constrained local voltage regulation-emphasizing fault tolerance, wide temperature operation, and zero-external-component simplicity in harsh environments.
FAQ
Is ZSR1200GTA stable without an output capacitor?
Yes. The ZSR1200GTA is internally compensated and fully stable with no external output capacitor required. An optional 1–10 µF ceramic capacitor may be added to improve transient response under dynamic load changes, but it is not necessary for loop stability or basic regulation.
What is the minimum input voltage needed to maintain 12 V output at 200 mA?
The minimum input voltage is 14.0 V (typical) and 13.7 V (guaranteed) across temperature and load. This accounts for worst-case dropout voltage (1.7 V) plus margin for line regulation error. Below this, output voltage drops nonlinearly and regulation is lost.
Can ZSR1200GTA be used in parallel for higher current?
No. The ZSR1200GTA is not designed for parallel operation. Its output voltage tolerance (±2.5%) and lack of current-sharing features mean mismatched units will cause one device to dominate conduction, risking thermal runaway and premature failure.
Does pin 4 (thermal pad) require a solder connection?
Pin 4 is the exposed thermal pad and is not electrically connected to any internal node. For optimal thermal performance (achieving the rated 40 °C/W), it must be soldered to a large copper ground plane. Leaving it unconnected degrades thermal resistance to ~80 °C/W or worse.
ZSR1200GTA 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):
- 12V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 600 µA
- Current - Supply (Max):
- -
- PSRR:
- 57dB (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
ZSR1200GTA FAQ
1.How can I place an order for ZSR1200GTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSR1200GTA 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 ZSR1200GTA reliable?
The price and inventory of ZSR1200GTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSR1200GTA is usually 5 days.
3.What payment methods are accepted for ZSR1200GTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSR1200GTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSR1200GTA?
ZSR1200GTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSR1200GTA 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 ZSR1200GTA?
For technical support, including ZSR1200GTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSR1200GTA requirements.
6.How does Aetrix verify that ZSR1200GTA is sourced from the original manufacturer or authorized distributors?
All ZSR1200GTA 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 ZSR1200GTA meets industry standards.
7.What is the process for return or replacement of ZSR1200GTA?
All ZSR1200GTA units undergo pre-shipment inspection (PSI). If there is an issue with ZSR1200GTA, 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 ZSR1200GTA part is unused and in its original packaging.
Return procedure for ZSR1200GTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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