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

Diodes Incorporated ZMR330F-7

Name: ZMR330F-7
Brand: Diodes Incorporated
SKU: ZMR330F-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZMR330F-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: ZMR330F-7.pdf

Description:: IC REG LINEAR 3.3V 50MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,420

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Product details

Overview

ZMR330F-7 from Diodes Incorporated is a fixed 3.3 V, low-quiescent-current (120–170 µA) positive voltage regulator in SOT23-3 package, delivering up to 50 mA output current with input voltage range of 5 V to 24 V. It features internal short-circuit protection, thermal shutdown, and unconditionally stable operation without external capacitors - ideal for local low-current power rails in space-constrained consumer electronics.

For engineers reviewing the ZMR330F-7 datasheet, ZMR330F-7 pinout, ZMR330F-7 application, or ZMR330F-7 equivalent, key selection criteria include dropout behavior at temperature extremes, load/line regulation performance (±15 mV), ripple rejection (55 dB @ 120 Hz), and SOT23 thermal derating limits under continuous 50 mA load.

Technical Context

The ZMR330F-7 employs a bandgap-referenced shunt-regulator topology with integrated pass transistor, enabling stable 3.3 V output across –55°C to +125°C junction temperature. Its design eliminates need for external compensation, supporting operation with zero-output-capacitor configurations.

It operates as a three-terminal linear regulator with fixed output, requiring only input and output bypassing per layout guidelines. Input-to-output differential must exceed 1.44 V (typ.) to maintain regulation, and maximum power dissipation is limited to 500 mW at 25°C ambient in SOT23 package.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.3 V ±2.5% (3.217–3.383 V at 25°C, 3.148–3.408 V over full temp/load)
Input Voltage Range	5 V to 24 V - supports wide-input systems like 12 V rail conditioning or battery-backed supplies
Max Output Current	50 mA - sufficient for microcontroller I/O banks or sensor biasing, not main SoC core supply
Quiescent Current	120–170 µA - enables >1-year battery life in always-on IoT sensors with 10 µA sleep modes
Ripple Rejection	55 dB @ 120 Hz - suppresses AC line noise on switched-mode supply outputs feeding analog circuitry
Line Regulation	5–15 mV - ensures <0.5% output shift across full input range, critical for ADC reference stability
Load Regulation	13–30 mV - maintains tight voltage control during digital I/O switching transients
Dropout Voltage	1.44 V (typ. at 50 mA) - defines minimum VIN needed to sustain regulation under full load

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.9 mm × 1.3 mm footprint, 1.1 mm height, surface-mount compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input Supply Terminal	Accepts 5–24 V DC; requires ≥1 µF ceramic bypass capacitor placed within 3 mm of pin
2 (GND)	Ground Reference	Low-impedance return path for regulator and load; connects to PCB ground plane under package
3 (OUT)	Regulated Output	Delivers stable 3.3 V; may be directly connected to MCU VDD_IO or sensor VCC with ≤100 nF local decoupling

Key Features

Feature	Design Value
Unconditionally Stable	No external capacitor required - reduces BOM count and PCB area in ultra-compact designs
Thermal Shutdown Protection	Activates at T_J ≥125°C - prevents permanent damage during sustained overload or poor heatsinking
Internal Short-Circuit Limit	Clamps output current to safe level (~100 mA peak) - avoids fuse reliance in cost-sensitive consumer products
Low-Temp Drift	0.275–0.700 mV/°C - ensures <15 mV total output variation over –55°C to +125°C operating range
Green Compliance	Fully RoHS-compliant, halogen- and antimony-free - meets IPC-1752A material declaration requirements

Applications

DVD/Blu-Ray Player Power Rail

Smart TV Local Microcontroller Supply

Use Scenario: Providing clean 3.3 V to DVD drive controller IC and optical pickup servo circuits.

IC Role / Device Role / Timing Role: Local linear regulator isolating sensitive analog front-end from noisy SMPS-derived 5 V rail.

Use Value: 80 µV_rms output noise and 55 dB ripple rejection prevent jitter-induced read errors during high-speed disc rotation.

Use Scenario: Powering HDMI CEC controller and IR receiver in smart TV mainboard.

IC Role / Device Role / Timing Role: Standby-mode LDO supplying always-on logic while system is in deep-sleep state.

Use Value: 120 µA quiescent current enables <10 µW standby power draw - compliant with Energy Star Tier 2 requirements.

Security System Motion Sensor Node

Set-Top Box USB Peripheral Interface

Use Scenario: Regulating battery-derived voltage to PIR sensor signal chain and wake-up comparator.

IC Role / Device Role / Timing Role: Low-noise, low-I_Q regulator enabling multi-year coin-cell operation.

Use Value: Stable 3.3 V output over –25°C to +70°C ambient ensures reliable detection threshold calibration across seasonal temperature swings.

Use Scenario: Generating 3.3 V for USB PHY termination resistors and ESD protection ICs.

IC Role / Device Role / Timing Role: Point-of-load regulator decoupling USB data lines from shared 5 V bus.

Use Value: Fast load transient response (<50 µs recovery) prevents data corruption during USB enumeration bursts.

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
MCP1700T-3302E/TT	Lower quiescent current (1.6 µA), but max 250 mA output; SOT23-5 package with EN pin	Requires enable control logic; better for ultra-low-power sleep modes, less suitable for simple drop-in replacement	Select if system demands sub-µA shutdown current and has GPIO resources for EN control
AP2210K-3.3TRG1	Higher output current (150 mA), 60 µA I_Q, but tighter initial tolerance (±1%) and lower dropout (0.45 V @ 150 mA)	Supports higher-current peripherals (e.g., Wi-Fi modules); requires different thermal layout due to higher power handling	Select when driving >50 mA loads or needing tighter initial accuracy without trimming

Compared with MCP1700T-3302E/TT and AP2210K-3.3TRG1, the ZMR330F-7 offers optimal balance of simplicity (no EN pin), proven stability without external caps, and robust thermal protection - making it preferred for cost-sensitive, space-limited consumer applications where 50 mA and ±2.5% tolerance are sufficient.

Availability

ZMR330F-7 is available at Aetrix Electronics and suitable for DVD/Blu-Ray players, smart TVs, security system sensors, and set-top box peripheral interfaces requiring stable component supply and long-term production continuity.

Supply support for ZMR330F-7 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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.

The ZMR series belongs to Diodes' precision voltage regulator product line, designed specifically for space-constrained, low-power consumer electronics requiring minimal external components and guaranteed thermal robustness.

FAQ

What is the minimum input voltage required for ZMR330F-7 to maintain regulation?

The ZMR330F-7 requires a minimum input voltage of 4.74 V to maintain 3.3 V output regulation under all conditions, as specified in the datasheet. This corresponds to a typical dropout voltage of 1.44 V at 50 mA load. At lighter loads, dropout decreases - e.g., ~0.8 V at 10 mA - allowing operation from lower VIN in low-current applications.

Can ZMR330F-7 operate without an output capacitor?

Yes - the ZMR330F-7 is unconditionally stable and does not require an output capacitor for basic regulation. However, a 1–10 µF ceramic capacitor is recommended at the output to improve transient response and reduce high-frequency noise, especially when powering digital loads with fast switching currents.

Is ZMR330F-7 compatible with lead-free reflow soldering processes?

Yes - ZMR330F-7 is fully RoHS-compliant and rated for standard lead-free reflow profiles (J-STD-020D), with peak temperature tolerance up to 260°C for 30 seconds. The SOT23 package uses matte tin plating and meets JEDEC moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to assembly.

How does thermal derating affect maximum output current at elevated ambient temperatures?

Maximum power dissipation is 500 mW at 25°C ambient and linearly derates to zero at 125°C. At 85°C ambient, allowable power drops to ~300 mW. With 3.3 V output and 24 V input, worst-case dropout power = (24 − 3.3) × I_OUT; solving yields ~14.5 mA max continuous current at 85°C - confirming need for thermal design review in enclosed environments.

ZMR330F-7 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:: Obsolete

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:: 55dB (120Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZMR330F-7 FAQ

1.How can I place an order for ZMR330F-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZMR330F-7 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 ZMR330F-7 reliable?

The price and inventory of ZMR330F-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR330F-7 is usually 5 days.

3.What payment methods are accepted for ZMR330F-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR330F-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZMR330F-7?

ZMR330F-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZMR330F-7 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 ZMR330F-7?

For technical support, including ZMR330F-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR330F-7 requirements.

6.How does Aetrix verify that ZMR330F-7 is sourced from the original manufacturer or authorized distributors?

All ZMR330F-7 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 ZMR330F-7 meets industry standards.

7.What is the process for return or replacement of ZMR330F-7?

All ZMR330F-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMR330F-7, 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 ZMR330F-7 part is unused and in its original packaging.

Return procedure for ZMR330F-7:

1.Submit a request within 90 days.

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

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