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

Diodes Incorporated ZSR800GTA

Name: ZSR800GTA
Brand: Diodes Incorporated
SKU: ZSR800GTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZSR800GTA

Manufacturer:: Diodes Incorporated

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

Package:: TO-261-4, TO-261AA

Datasheet:: ZSR800GTA.pdf

Description:: IC REG LINEAR 8V 200MA SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:1,000

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Product details

Overview

ZSR800GTA from Zetex plc is a fixed-output 8.0 V positive 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 (7.8–8.2 V), 350 µA typical quiescent current, and operates across –55°C to +125°C. It is used in industrial sensor nodes where stable low-power biasing of analog front-ends is required.

For engineers reviewing the ZSR800GTA datasheet, ZSR800GTA pinout, ZSR800GTA application, or ZSR800GTA equivalent, this page provides verified technical context, package-specific thermal derating data, load/line regulation performance at 100 mA, ripple rejection at 120 Hz, and real-world transient response behavior under fast dV_in/dt and dI_o/dt conditions.

Technical Context

The ZSR800GTA employs an internally compensated bandgap reference and series pass transistor architecture, enabling stability without external capacitors. Its thermal shutdown activates above junction temperature limits, and internal short-circuit current limiting protects against sustained overloads.

It requires a minimum input voltage of 9.7 V to maintain regulation at full load (200 mA), with dropout voltage rising from 1.0 V at 25°C to 2.5 V at 125°C. Ripple rejection is specified at 44–60 dB (120 Hz, V_in = 11–18 V), and output noise is 115 µV_rms (10 Hz–10 kHz).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	7.8–8.2 V (±2.5% initial tolerance at 1–200 mA load)
Max Output Current	200 mA (limited by package power dissipation and thermal derating)
Quiescent Current	350 µA typical (enables ultra-low standby power in battery-backed systems)
Line Regulation	11 mV max (ΔV_O over 10–20 V input range at 100 mA)
Load Regulation	8 mV max (ΔV_O from 1 to 200 mA at V_in = 10 V)
Ripple Rejection	44–60 dB (120 Hz, V_in = 11–18 V, critical for noisy supply rails)
Operating Temp	–55°C to +125°C (fully specified for extended industrial environments)

Pinout & Package

SOT223 package (suffix G) with 3 active terminals: Input (Pin 1), Ground (Pin 2), Output (Pin 3). Pin 4 is internally connected to Pin 2 or electrically isolated per design - no external connection required. Thermal pad on underside enhances PCB heat transfer.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Input	Unregulated DC input (min 9.7 V, max 20 V); must be decoupled with ≥1 µF capacitor to prevent overshoot during thermal shutdown
Pin 2	Ground	Reference node for regulation; connects to PCB ground plane and thermal pad for optimal thermal performance
Pin 3	Output	Stable 8.0 V regulated output; capable of sourcing 200 mA with <8 mV load-induced deviation

Key Features

Feature	Design Value
No external components required	Fully stable with zero external capacitors - reduces BOM count and layout area
Internal thermal shutdown	Automatic protection at safe junction temperature threshold; recovers after cooldown
Internal short-circuit current limit	Peak output current limited to ~400 mA at 25°C, decreasing linearly with temperature
Low output noise	115 µV_rms (10 Hz–10 kHz) - suitable for precision analog circuitry without added filtering
Wide operating temperature	Specified from –55°C to +125°C - validated for automotive under-hood and industrial control cabinet use

Applications

Industrial Sensor Node Power

Programmable Logic Controller I/O Module

Use Scenario: Local 8 V bias for 24-bit sigma-delta ADC and signal-conditioning op-amps in a distributed temperature sensor node.

IC Role / Device Role / Timing Role: Fixed-output local regulator providing clean, low-noise supply independent of main 24 V rail fluctuations.

Use Value: 115 µV_rms output noise and 44–60 dB ripple rejection preserve ENOB in high-resolution measurement chains.

Use Scenario: Dedicated 8 V supply for isolated digital I/O drivers and optocoupler LEDs in modular PLC backplane slots.

IC Role / Device Role / Timing Role: Point-of-load regulator ensuring consistent LED forward voltage and driver logic thresholds despite shared 24 V bus transients.

Use Value: 8 mV load regulation and fast transient response (<50 µs recovery) prevent false triggering during burst-mode I/O switching.

Automotive Body Control Unit

Medical Diagnostic Front-End

Use Scenario: Powering CAN transceiver bias and microcontroller peripherals in non-safety-critical body modules (e.g., seat/mirror control).

IC Role / Device Role / Timing Role: Local regulator tolerant of cold-crank (4.5 V) and load-dump (30 V) events when paired with upstream protection.

Use Value: –55°C to +125°C operation and internal thermal shutdown ensure reliability in engine bay-adjacent mounting locations.

Use Scenario: Supplying low-noise analog front-end for ECG amplifier stages requiring stable 8 V reference rails.

IC Role / Device Role / Timing Role: Regulator delivering ultra-low-noise, drift-stable voltage to precision instrumentation amplifiers and filter ICs.

Use Value: 0.25 mV/°C tempco and <8 mV load regulation maintain gain accuracy across patient-room ambient shifts (15–35°C).

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
TLV73380PDBVR	Lower IQ (45 µA), lower dropout (250 mV @ 200 mA), but only rated to 125°C and requires 1 µF output capacitor	Better for battery-powered portable devices; unsuitable for extended-temp industrial use without derating	Choose if ultra-low quiescent current and minimal dropout dominate over temperature range and capacitor-free operation
LDL112SV80R	Higher PSRR (70 dB @ 120 Hz), same 8 V output and SOT223 package, but max I_O = 150 mA and higher quiescent current (1.2 mA)	Preferred for high-PSRR analog supplies; insufficient for 200 mA continuous loads	Choose if ripple rejection >60 dB is mandatory and load stays ≤150 mA

Compared with TLV73380PDBVR and LDL112SV80R, ZSR800GTA uniquely combines capacitor-free stability, –55°C capability, and 200 mA output in a single SOT223 device - making it optimal for ruggedized, space-limited industrial and automotive local regulation where external component count and thermal margin are critical.

Availability

ZSR800GTA is available at Aetrix Electronics and suitable for industrial sensor nodes, programmable logic controller I/O modules, automotive body control units, and medical diagnostic front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZSR800GTA 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 discrete power solutions for industrial, automotive, and communications markets.

The ZSR Series was engineered for robust local voltage regulation in harsh environments, emphasizing intrinsic fault protection, wide temperature operation, and minimal external component requirements - targeting applications where reliability outweighs ultra-low IQ or ultra-low dropout.

FAQ

Does ZSR800GTA require an input bypass capacitor?

Yes - a minimum 1 µF ceramic capacitor is recommended across the input pins to suppress voltage overshoot during thermal shutdown events, especially when supplied from inductive sources. This prevents exceeding the 20 V absolute maximum rating during transient recovery.

What is the maximum power dissipation for ZSR800GTA in SOT223 at 25°C ambient?

The SOT223 package supports 2 W maximum power dissipation at T_amb = 25°C, assuming mounting on a 2-inch square PCB. Derating is linear to zero at 125°C ambient, yielding ~1.2 W usable at 75°C ambient per the published thermal resistance vs. pulse width curves.

Can ZSR800GTA be used with a 9 V nominal input source?

No - the minimum input voltage to maintain regulation at full 200 mA load is 9.7 V. A 9 V source will cause dropout under load. For 9 V input, select ZSR850GTA (8.5 V output, min V_in = 10.2 V) or add a pre-regulator stage.

Is the SOT223 thermal pad electrically connected to any internal node?

No - the thermal pad on the ZSR800GTA SOT223 package is not internally connected. It may be soldered directly to a PCB ground plane or thermal copper pour for improved heat dissipation, but must remain electrically isolated from all signals.

ZSR800GTA 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):: 8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 200mA

Current - Quiescent (Iq):: 600 µA

Current - Supply (Max):: -

PSRR:: 60dB (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

ZSR800GTA FAQ

1.How can I place an order for ZSR800GTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZSR800GTA 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 ZSR800GTA reliable?

The price and inventory of ZSR800GTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSR800GTA is usually 5 days.

3.What payment methods are accepted for ZSR800GTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSR800GTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZSR800GTA?

ZSR800GTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZSR800GTA 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 ZSR800GTA?

For technical support, including ZSR800GTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSR800GTA requirements.

6.How does Aetrix verify that ZSR800GTA is sourced from the original manufacturer or authorized distributors?

All ZSR800GTA 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 ZSR800GTA meets industry standards.

7.What is the process for return or replacement of ZSR800GTA?

All ZSR800GTA units undergo pre-shipment inspection (PSI). If there is an issue with ZSR800GTA, 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 ZSR800GTA part is unused and in its original packaging.

Return procedure for ZSR800GTA:

1.Submit a request within 90 days.

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

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