Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated ZMR330QFTA

Name: ZMR330QFTA
Brand: Diodes Incorporated
SKU: ZMR330QFTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZMR330QFTA

Manufacturer:: Diodes Incorporated

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

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZMR330QFTA.pdf

Description:: LINEAR REG LOW CURR SOT23 T&R 3K

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,417

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZMR330QFTA from Diodes Incorporated is an automotive-grade, fixed-output 3.3V positive voltage regulator in SOT23 (Type DN) package, delivering up to 50mA output current with 3.3V ±2.5% initial accuracy, 120–170µA quiescent current over temperature, and 4.74V minimum input voltage for regulation. It features internal short-circuit current limiting, thermal shutdown, and AEC-Q100 Grade 1 qualification for under-hood automotive point-of-load applications.

For engineers reviewing the ZMR330QFTA datasheet, ZMR330QFTA pinout, ZMR330QFTA application, or ZMR330QFTA equivalent, key selection criteria include its 3.3V output tolerance across -40°C to +125°C, low-noise 80µV_RMS output (10Hz–10kHz), 55–75dB ripple rejection at 120Hz, and guaranteed stability without external capacitors.

Technical Context

This three-terminal linear regulator operates as a fixed-voltage source with unconditionally stable operation-no external compensation required. Its internal architecture integrates thermal overload protection and current-limiting circuitry that shuts down the device before destructive failure.

The regulator maintains regulation with input voltages as low as 4.74V (for 3.3V output), supports load currents from 0 to 50mA, and exhibits line regulation of ≤15mV and load regulation of ≤50mV across full operating conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.3V ±2.5% (2.36V–3.408V over -40°C to +125°C, IO = 0–50mA)
Max Output Current	50mA continuous-sufficient for microcontroller I/O rails or sensor biasing in automotive modules
Quiescent Current	120–170µA over full temperature range-enables always-on subsystems with minimal battery drain
Ripple Rejection	55–75dB at 120Hz-effectively suppresses alternator ripple in 12V vehicle electrical systems
Dropout Voltage	Not explicitly specified, but minimum input = 4.74V implies ~1.44V dropout at 10mA (VIN – VOUT)
Output Noise	80µV_RMS (10Hz–10kHz)-low enough for analog sensor signal conditioning without added filtering
Thermal Protection	Automatic shutdown above +125°C junction temperature-prevents latch-up or permanent damage during transient overloads

Pinout & Package

SOT23 (Type DN) surface-mount package: 3-pin, 2.8mm × 2.42mm footprint, 0.95mm pitch, 0.3mm nominal lead length, RoHS-compliant green molding compound.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Input voltage supply terminal	Accepts 4.8V–24V DC input; must exceed 4.74V to maintain regulation at all loads/temperatures
VOUT	Regulated 3.3V output terminal	Delivers stable 3.3V to downstream logic or analog circuitry; no external capacitor required for stability
GND	Ground reference terminal	Common return path for input and output current; must be low-impedance connection to system ground plane

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive use from -40°C to +125°C ambient, supporting PPAP documentation
Unconditionally stable operation	No external output capacitor needed-reduces BOM count and PCB area in space-constrained modules
Internal short-circuit and thermal protection	Self-protecting behavior eliminates need for external fuse or current-sense circuitry
Green, halogen- and antimony-free packaging	Meets automotive environmental standards: <900ppm Br, <900ppm Cl, <1000ppm Sb
Low ESD sensitivity (HBM 1.5kV)	Robust handling during automated assembly and in-vehicle service without special ESD controls

Applications

Body Control Module (BCM) I/O Rail

Automotive Camera Sensor Bias

Use Scenario: Powering CAN transceiver logic interfaces and GPIO expanders in body control units exposed to engine bay temperatures.

IC Role / Device Role / Timing Role: Fixed 3.3V local power rail regulator providing clean, stable voltage independent of main 12V bus fluctuations.

Use Value: Maintains 3.3V within ±2.5% over -40°C to +125°C while drawing only 170µA max-enabling reliable communication during cold cranking and hot soak.

Use Scenario: Supplying bias voltage to CMOS image sensors in rear-view or surround-view camera modules.

IC Role / Device Role / Timing Role: Low-noise 3.3V analog supply rail decoupled from noisy digital domains.

Use Value: 80µV_RMS output noise prevents visible banding or fixed-pattern noise in captured video under varying lighting conditions.

Instrument Cluster Microcontroller Core

Automotive HVAC Display Backlight Driver

Use Scenario: Regulating power for ARM Cortex-M0+ MCU cores in digital instrument clusters where firmware must remain responsive during ignition transients.

IC Role / Device Role / Timing Role: Primary 3.3V supply for processor core and internal peripherals, with fast line/load transient response.

Use Value: Line transient response settles within 10µs (±0.4V deviation), preventing brown-out resets during 12V bus dips to 6V.

Use Scenario: Providing regulated 3.3V to LED driver IC logic inputs in climate control panel displays.

IC Role / Device Role / Timing Role: Stable logic supply enabling precise PWM dimming control despite wide input voltage swings (9–16V).

Use Value: 55–75dB ripple rejection ensures display brightness remains constant even with high alternator ripple at idle or acceleration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV73333PDBVR	Lower quiescent current (35µA typ), higher PSRR (70dB @ 1kHz), but only AEC-Q200 qualified-not AEC-Q100 Grade 1	Lacks full automotive qualification for safety-critical ECUs; suitable for infotainment or comfort systems	Select if ultra-low IQ dominates over qualification level and ripple rejection at higher frequencies is needed
NCP1117ST33T3G	Higher output current (800mA), wider input range (up to 20V), but 6mA quiescent current and no AEC-Q100 qualification	Designed for industrial/commercial use; not validated for automotive temperature cycling or PPAP	Choose only for non-automotive designs requiring higher current or lower cost-unsuitable for automotive production

Compared with TLV73333PDBVR and NCP1117ST33T3G, ZMR330QFTA uniquely combines AEC-Q100 Grade 1 qualification, 170µA max IQ, and guaranteed stability without output capacitance-making it the only option qualified for under-hood, safety-relevant point-of-load regulation where qualification traceability and minimal BOM are mandatory.

Availability

ZMR330QFTA is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, and instrument cluster power management requiring stable component supply, full PPAP documentation, and long-term lifecycle support.

Supply support for ZMR330QFTA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The ZMR series targets automotive point-of-load regulation, delivering AEC-Q100-qualified, low-IQ, stable LDOs in miniature SOT23 packages for space-constrained, thermally demanding environments.

FAQ

Is ZMR330QFTA pin-compatible with ZMR250QFTA or ZMR500QFTA?

Yes-ZMR330QFTA shares identical SOT23 (Type DN) pinout (VIN-VOUT-GND), same package dimensions, and identical marking layout with ZMR250QFTA and ZMR500QFTA. This enables drop-in replacement across the ZMR family when adjusting output voltage without PCB redesign.

What is the maximum allowable power dissipation at 85°C ambient?

At TA = 85°C, the SOT23 (Type DN) package's 500mW rating at 25°C derates linearly to zero at 125°C, yielding 333mW max. With VO = 3.3V and IO = 50mA, power dissipation is 165mW-well within safe limits even with modest PCB copper area.

Does ZMR330QFTA require an input or output capacitor for stability?

No-ZMR330QFTA is unconditionally stable per datasheet and requires no external capacitors. However, a 1µF ceramic capacitor on VIN improves transient response, and a 1µF ceramic on VOUT reduces output impedance below 100kHz per typical application guidance.

Can ZMR330QFTA operate with input voltage below 4.74V?

No-4.74V is the minimum input voltage required to maintain 3.3V regulation at 10mA. Below this, output voltage drops linearly with input (dropout behavior). For applications with input as low as 4.5V, consider a lower-dropout alternative or verify worst-case load/temperature margin.

ZMR330QFTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 24V

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 50mA

Current - Quiescent (Iq):: 170 µA

Current - Supply (Max):: -

PSRR:: -

Control Features:: -

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23 (Type DN)

ZMR330QFTA FAQ

1.How can I place an order for ZMR330QFTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZMR330QFTA 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 ZMR330QFTA reliable?

The price and inventory of ZMR330QFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR330QFTA is usually 5 days.

3.What payment methods are accepted for ZMR330QFTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR330QFTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZMR330QFTA?

ZMR330QFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZMR330QFTA 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 ZMR330QFTA?

For technical support, including ZMR330QFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR330QFTA requirements.

6.How does Aetrix verify that ZMR330QFTA is sourced from the original manufacturer or authorized distributors?

All ZMR330QFTA 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 ZMR330QFTA meets industry standards.

7.What is the process for return or replacement of ZMR330QFTA?

All ZMR330QFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZMR330QFTA, 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 ZMR330QFTA part is unused and in its original packaging.

Return procedure for ZMR330QFTA:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…