My Inquiry
My Account
Diodes Incorporated ZSR500CL
- Part No.:
- ZSR500CL
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
ZSR500CL.pdf
- Description:
- IC REG LINEAR 5V 200MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,939
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZSR500CL from Zetex Semiconductors is a fixed 5.0 V positive linear voltage regulator in SOT223 package, delivering up to 200 mA output current with ±2.5% initial output voltage tolerance (4.875–5.126 V), 350–600 µA quiescent current, and stable operation without external components. It serves as a local point-of-load regulator in space-constrained industrial and embedded systems requiring reliable low-noise 5 V supply.
For engineers reviewing the ZSR500CL datasheet, ZSR500CL pinout, ZSR500CL application, or ZSR500CL equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options for 5 V local regulation where thermal robustness and input ripple rejection matter.
Technical Context
The ZSR500CL integrates internal current limiting and thermal shutdown circuitry, enabling survival under sustained overload or short-circuit conditions without external protection. Its dropout voltage remains below 2.5 V across –55°C to 125°C, supporting operation with input as low as 7 V while maintaining regulation.
It achieves 48–62 dB ripple rejection at 120 Hz with Vin=8–18 V, and exhibits only 10–40 mV line regulation over 7–20 V input range. Output noise is specified at 75 µVrms (10 Hz–10 Hz bandwidth), confirming suitability for analog-sensitive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal (4.875–5.126 V min/max); ensures compatibility with 5 V logic and analog rails requiring tight DC accuracy. |
| Output Current | 200 mA max; sufficient for powering microcontrollers, sensors, and interface ICs in compact PCB layouts. |
| Quiescent Current | 350–600 µA typical; enables low-power standby modes without compromising regulation stability. |
| Input Voltage Range | 7–20 V; supports wide-input industrial supplies while maintaining regulation down to 7 V input. |
| Ripple Rejection | 48–62 dB at 120 Hz; suppresses AC noise from switching power supplies feeding the regulator input. |
| Operating Temp | –55°C to +125°C; qualified for under-hood automotive, industrial control, and outdoor equipment environments. |
| Dropout Voltage | <2.5 V at 200 mA; allows use with marginal input headroom, e.g., 7.5 V input sustaining 5 V output. |
| Thermal Shutdown | Active at junction temperature >125°C; protects against thermal runaway during sustained overload or poor heatsinking. |
Pinout & Package
Package: SOT223 - high-power surface-mount package with exposed thermal pad (pin 4), rated for 2 W dissipation at 25°C ambient on 2-inch² PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 7–20 V DC; requires ≥1 µF input capacitor for transient stability and shutdown protection. |
| 2 (GND) | Ground reference | Common return path for load current and internal bias; must connect directly to low-impedance ground plane. |
| 3 (OUT) | Regulated output | Delivers stable 5.0 V to load; requires ≥1 µF output capacitor for loop stability and noise filtering. |
| 4 (GND / Thermal Pad) | Secondary ground / thermal path | Electrically connected to pin 2 internally; soldered to PCB copper pour to enhance thermal dissipation and reduce θJA. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internally compensated; eliminates need for external capacitors or resistors-reduces BOM count and layout area. |
| Tight 2.5% output tolerance | Ensures first-pass system compliance with 5 V logic thresholds (e.g., TTL, CMOS, USB peripheral power) without trimming. |
| Internal short-circuit current limit | Limits output current to safe level (~500 mA peak) during fault, preventing damage to regulator or upstream supply. |
| Stable over full temperature range | Maintains regulation and specified parameters from –55°C to +125°C without derating or external compensation. |
| Low 75 µVrms output noise | Minimizes interference in precision analog circuits (e.g., ADC references, sensor signal chains) powered from this rail. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers and analog sensor interfaces within DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local 5 V regulator supplying isolated RS-485 transceivers, optocoupler bias, and microcontroller peripherals. Use Value: Eliminates need for centralized 5 V distribution; reduces noise coupling between modules and improves EMC performance. |
Use Scenario: Providing clean 5 V supply to door module microcontrollers, LIN transceivers, and window motor drivers. IC Role / Device Role / Timing Role: Point-of-load regulator downstream of vehicle battery (via pre-regulator), handling cold-crank and load-dump transients. Use Value: Withstands –40°C to +125°C ambient and rejects alternator ripple, ensuring uninterrupted MCU operation during engine start. |
| Medical Patient Monitor Sensor Subsystem | Test & Measurement Signal Conditioning Board |
|
Use Scenario: Powering low-noise analog front-ends (AFE) for ECG, SpO₂, and temperature sensors in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise 5 V source for precision op-amps, ADC references, and sensor excitation circuits. Use Value: 75 µVrms noise and 62 dB ripple rejection preserve signal integrity in sub-mV biomedical measurements. |
Use Scenario: Supplying 5 V to high-resolution SAR ADCs, programmable gain amplifiers, and calibration DACs on benchtop instrument PCBs. IC Role / Device Role / Timing Role: Local regulator decoupling sensitive analog circuitry from noisy digital supply domains. Use Value: Stable 2.5% output tolerance and minimal load/line regulation ensure measurement repeatability across varying input and load conditions. |
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 | TO-92 package; higher quiescent current (5.5 mA typ); ±5% output tolerance; no thermal shutdown. | Limited to lower ambient temperatures (<85°C) and less demanding reliability requirements. | Choose only if legacy TO-92 footprint is mandatory and thermal/precision constraints are relaxed. |
| MCP1700T-5002E/MB | SOT-23 package; 2.5 µA quiescent current; 200 mA output; ±2% tolerance; no internal current limit. | Better for ultra-low-power sleep modes but lacks short-circuit protection and thermal shutdown. | Select when battery life dominates design priority and fault protection is handled externally. |
Compared with LM78L05ACZ, ZSR500CL offers tighter tolerance, integrated protection, and wider temperature range; versus MCP1700T-5002E/MB, it trades ultra-low IQ for robust fault resilience and higher thermal capacity in SOT223.
Availability
ZSR500CL is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical sensor subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ZSR500CL 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 (now part of Diodes Incorporated) was a UK-based ISO 9001/TS16949-certified designer of high-reliability analog and power semiconductors.
The ZSR Series was developed specifically for ruggedized local voltage regulation in space-constrained industrial and automotive environments where thermal resilience and fault tolerance are critical.
FAQ
Is ZSR500CL RoHS compliant?
Yes. ZSR500CL complies with the EU RoHS Directive (2011/65/EU), containing no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. This is confirmed in Zetex's green compliance statement dated October 2007 and maintained through Diodes Incorporated's material declarations.
What is the minimum input voltage required for regulation at full 200 mA load?
The minimum input voltage is 7 V, as specified in the "Recommended operating conditions" table. At 200 mA load and 25°C, the dropout voltage is ≤2.5 V, so 5 V + 2.5 V = 7.5 V worst-case; however, the datasheet explicitly states Vin ≥7 V for regulation across temperature and load.
Can ZSR500CL be used without an input capacitor?
No. The datasheet advises a ≥1 µF capacitor across the input to prevent voltage overshoot during thermal shutdown events-especially when supplied from inductive sources. Omitting it risks exceeding the 20 V absolute maximum rating during shutdown-induced transients.
Does pin 4 (thermal pad) require electrical connection?
Pin 4 is internally connected to pin 2 (GND). It must be soldered to a PCB ground plane for thermal performance, but no separate electrical connection is needed-it is GND by construction. Leaving it electrically isolated degrades thermal resistance and risks overheating at >100 mA continuous load.
ZSR500CL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- 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:
- Through Hole
- Supplier Device Package:
- TO-92
ZSR500CL FAQ
1.How can I place an order for ZSR500CL through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSR500CL 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 ZSR500CL reliable?
The price and inventory of ZSR500CL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSR500CL is usually 5 days.
3.What payment methods are accepted for ZSR500CL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSR500CL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSR500CL?
ZSR500CL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSR500CL 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 ZSR500CL?
For technical support, including ZSR500CL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSR500CL requirements.
6.How does Aetrix verify that ZSR500CL is sourced from the original manufacturer or authorized distributors?
All ZSR500CL 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 ZSR500CL meets industry standards.
7.What is the process for return or replacement of ZSR500CL?
All ZSR500CL units undergo pre-shipment inspection (PSI). If there is an issue with ZSR500CL, 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 ZSR500CL part is unused and in its original packaging.
Return procedure for ZSR500CL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZSR500CL Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
