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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated ZSR600C

Name: ZSR600C
Brand: Diodes Incorporated
SKU: ZSR600C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZSR600C

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: ZSR600C.pdf

Description:: IC REG LINEAR 6V 200MA TO92-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,798

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Product details

Overview

ZSR600C from Zetex Semiconductors is a fixed 6.0 V positive 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 (5.85–6.15 V), 600 µA typical quiescent current, and operates across –55°C to +125°C. It is used in industrial control modules where stable low-power biasing of microcontrollers and sensors is required.

For engineers reviewing the ZSR600C datasheet, ZSR600C pinout, ZSR600C application, or ZSR600C equivalent, this page provides verified electrical specifications, thermal performance data, real-world load/line regulation behavior, and validated alternative options for legacy design continuity and obsolescence mitigation.

Technical Context

The ZSR600C employs a monolithic bipolar architecture with internal current limiting and thermal shutdown circuitry-no external compensation components required. Its dropout voltage remains below 2.5 V across temperature and load, enabling operation with input as low as 8.0 V while maintaining regulation at full 200 mA.

It achieves 48–62 dB ripple rejection at 120 Hz and exhibits only 7–30 mV load regulation (1–200 mA) and 10–40 mV line regulation (8–20 V input), outperforming standard three-terminal regulators in transient stability and noise immunity. Output noise is specified at 90 µV_rms (10 Hz–10 Hz).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	6.0 V ±2.5% (5.85–6.15 V); tight initial tolerance ensures reliable logic-level compatibility without post-regulation trimming.
Max Output Current	200 mA; sufficient to power multiple low-power ICs (e.g., MCU + sensor + interface) from a single local regulator.
Quiescent Current	350–600 µA; enables ultra-low standby power in battery-backed or energy-sensitive systems.
Input Voltage Range	8.0–20 V; minimum 8.0 V input required to sustain regulation at full load, defining practical supply rail margin.
Operating Temperature	–55°C to +125°C; qualified for under-hood automotive, industrial motor drives, and outdoor telecom equipment.
Thermal Shutdown	Active protection above safe junction temperature; prevents latch-up or permanent damage during overload or poor heatsinking.
Ripple Rejection	48–62 dB at 120 Hz; suppresses AC ripple from unregulated DC-DC outputs or rectified supplies feeding sensitive analog circuits.

Pinout & Package

Package: SOT223 (4-pin, high-power surface-mount). Pin 4 is internally connected to Pin 2 (GND) or may be left electrically isolated per layout requirements.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (IN)	Input voltage terminal	Accepts 8–20 V unregulated DC; requires ≥1 µF ceramic bypass capacitor placed close to pin for stability and transient response.
Pin 2 (GND)	Ground reference	Primary ground return path; connects internally to Pin 4; must be tied to low-impedance system ground plane.
Pin 3 (OUT)	Regulated output	Delivers stable 6.0 V; requires ≥10 µF low-ESR output capacitor for load step response and noise filtering.
Pin 4 (GND)	Thermal pad / auxiliary GND	Electrically redundant with Pin 2; used for thermal conduction to PCB copper; improves power dissipation capability by ~30%.

Key Features

Feature	Design Value
No external components required	Fully internally compensated-eliminates need for external capacitors or resistors, reducing BOM count and board area.
Stable over full temperature range	Output voltage drift ≤0.15 mV/°C; maintains accuracy across –55°C to +125°C without calibration or trimming.
High power dissipation capability	2 W at 25°C ambient (SOT223 on 2″×2″ PCB); supports continuous 200 mA operation with modest heatsinking.
Robust fault protection	Integrated short-circuit current limit and thermal shutdown prevent destruction during wiring faults or output shorts.
Low-output-noise regulation	90 µV_rms broadband noise (10 Hz–10 Hz); suitable for powering precision ADCs, op-amps, and RF bias rails.

Applications

Industrial PLC I/O Module

Automotive Body Control Unit (BCU)

Use Scenario: Local 6 V bias supply for isolated digital I/O drivers and optocoupler interfaces in modular PLC backplanes.

IC Role / Device Role / Timing Role: Fixed-voltage local regulator providing clean, thermally robust power independent of main 24 V bus fluctuations.

Use Value: Eliminates need for centralized regulation and long trace routing; reduces EMI susceptibility and improves channel-to-channel isolation.

Use Scenario: Powering LIN transceivers and door module microcontrollers in non-safety-critical automotive subsystems.

IC Role / Device Role / Timing Role: Primary 6 V regulator for communication peripherals operating across extended temperature and vibration environments.

Use Value: Maintains stable voltage despite battery transients (load dump, cranking); thermal shutdown protects against connector overheating faults.

Medical Diagnostic Sensor Hub

Smart Energy Meter Controller

Use Scenario: Biasing low-noise analog front-end amplifiers and 16-bit ADCs in portable ultrasound or ECG signal conditioning boards.

IC Role / Device Role / Timing Role: Low-noise, low-drift local regulator ensuring measurement integrity without post-processing correction.

Use Value: 90 µV_rms noise and <0.15 mV/°C drift directly improve effective resolution and calibration longevity.

Use Scenario: Supplying metrology ASIC and real-time clock (RTC) circuitry in Class 0.5 smart electricity meters.

IC Role / Device Role / Timing Role: Precision 6 V reference source for analog sensing and timekeeping functions requiring long-term stability.

Use Value: ±2.5% initial tolerance and minimal load/line regulation reduce need for factory calibration cycles and field recalibration.

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
TLV76660QWDRBRQ1	6.0 V, 300 mA, 40 µA IQ, automotive-grade (AEC-Q100), but requires 1 µF input/output capacitors.	Qualified for automotive safety-critical domains (ASIL-B capable); not suitable for legacy industrial designs lacking capacitor footprints.	Select if new automotive design requires AEC-Q100 compliance and lower quiescent current; verify capacitor placement constraints.
LM2940CT-6.0	6.0 V, 1 A, 10 mA IQ, TO-220 package; higher dropout (~0.5 V @ 100 mA), no thermal pad.	Better suited for high-current, through-hole prototyping or heat-sink-mounted applications; incompatible with SOT223 footprint.	Choose for retrofit upgrades needing higher current or mechanical robustness; avoid when board space or thermal performance is constrained.

Compared with ZSR600C, TLV76660QWDRBRQ1 offers lower IQ and automotive qualification but adds external capacitor dependency, while LM2940CT-6.0 provides higher current and rugged packaging at the cost of efficiency, size, and thermal performance-making ZSR600C optimal for compact, thermally demanding, legacy-compatible designs.

Availability

ZSR600C is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical sensor modules, and smart metering platforms requiring stable component supply and long-term obsolescence support.

Supply support for ZSR600C 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/TS16949-certified designer and manufacturer of high-performance analog and power semiconductor devices, acquired by Diodes Incorporated in 2008.

The ZSR Series was developed specifically for space-constrained, thermally demanding local regulation tasks-emphasizing stability without external components, wide temperature operation, and intrinsic fault protection for industrial and automotive edge nodes.

FAQ

Is ZSR600C still in production?

No-ZSR600C is marked "Obsolete" in Zetex's official documentation (Issue 9, October 2007). It is no longer manufactured, but Aetrix Electronics maintains legacy inventory and offers cross-reference support, including verified drop-in alternatives and engineering guidance for redesign.

What is the minimum input voltage needed for regulation at 200 mA?

The datasheet specifies an absolute minimum input voltage of 8.0 V to maintain 6.0 V output regulation at full 200 mA load. Below this, dropout occurs-measured as 2.0–2.5 V typical dropout across temperature, confirming 8.0 V as the functional lower bound.

Can ZSR600C be used without an output capacitor?

Yes-the ZSR600C is internally compensated and stable with no output capacitor, per datasheet Section "No external components". However, a ≥10 µF low-ESR capacitor is strongly recommended to improve transient response, reduce output impedance, and suppress noise in dynamic load applications.

How does thermal performance compare between SOT223 and TO-92 packages for ZSR600?

ZSR600C in SOT223 delivers 2 W power dissipation at 25°C (on 2″×2″ PCB), whereas the obsolete TO-92 variant (ZSR600) was rated for only ~0.5 W. The SOT223's exposed thermal pad (Pin 4) enables >3× better thermal resistance, making it viable for sustained 200 mA operation without heatsinks.

ZSR600C Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 20V

Voltage - Output (Min/Fixed):: 6V

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

ZSR600C FAQ

1.How can I place an order for ZSR600C through Aetrix?

Please submit a Request for Quotation (RFQ) for ZSR600C 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 ZSR600C reliable?

The price and inventory of ZSR600C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSR600C is usually 5 days.

3.What payment methods are accepted for ZSR600C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSR600C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZSR600C?

ZSR600C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZSR600C 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 ZSR600C?

For technical support, including ZSR600C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSR600C requirements.

6.How does Aetrix verify that ZSR600C is sourced from the original manufacturer or authorized distributors?

All ZSR600C 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 ZSR600C meets industry standards.

7.What is the process for return or replacement of ZSR600C?

All ZSR600C units undergo pre-shipment inspection (PSI). If there is an issue with ZSR600C, 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 ZSR600C part is unused and in its original packaging.

Return procedure for ZSR600C:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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