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

Diodes Incorporated AP7333-20SRG-7

Name: AP7333-20SRG-7
Brand: Diodes Incorporated
SKU: AP7333-20SRG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7333-20SRG-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7333-20SRG-7.pdf

Description:: IC REG LINEAR 2V 300MA SOT23R

Quantity:: RFQ Add To RFQ list

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Inventory:2,620

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Product details

Overview

AP7333-20SRG-7 from Diodes Incorporated is a 300mA fixed-output (2.0V) low-dropout linear regulator in SOT23R package, featuring 65µA quiescent current, 300mV dropout at full load, 65dB PSRR at 100Hz, and stable operation with 1µF ceramic output capacitor. It serves as a power management IC for battery-powered portable electronics requiring fast transient response and ultra-low standby power.

For engineers reviewing the AP7333-20SRG-7 datasheet, AP7333-20SRG-7 pinout, AP7333-20SRG-7 application, or AP7333-20SRG-7 equivalent, key selection criteria include dropout voltage under 300mA load, thermal shutdown threshold at 140°C, current limit of 400–600mA, stability with low-ESR capacitors, and SOT23R pin compatibility with space-constrained PCB layouts.

Technical Context

The AP7333-20SRG-7 integrates a PMOS pass element, precision band-gap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown). Its architecture enables fast start-up (80µs) and excellent load/line transient response without external compensation.

Designed for fixed 2.0V output, it operates across 2V–6V input range with ±2% output accuracy over –40°C to +85°C ambient. Built-in thermal hysteresis (15°C) ensures controlled recovery after shutdown, while PSRR performance supports noise-sensitive analog and RF subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.0V ±2% - ensures precise rail generation for 2.0V logic or analog circuitry without external feedback.
Max Output Current	300mA continuous - sufficient to power microcontrollers, sensors, or RF front-ends in compact portable devices.
Quiescent Current	65µA typical at full load - minimizes battery drain during sleep modes in always-on IoT endpoints.
Dropout Voltage	300mV typical at 300mA - enables regulation from 2.3V input, extending usable battery life down to single-cell Li-ion or alkaline discharge curves.
PSRR	65dB typical at 100Hz - suppresses low-frequency switching noise from DC-DC converters feeding the LDO input.
Start-up Time	80µs - allows rapid power sequencing in systems with dynamic voltage scaling or wake-from-sleep requirements.
Thermal Shutdown	Triggers at 140°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking.
Capacitor Stability	Stable with ≥1µF X7R/X5R ceramic output capacitor - eliminates need for bulky tantalum or electrolytic caps, reducing board area and cost.

Pinout & Package

SOT23R package: 3-pin surface-mount, RoHS-compliant, green molding compound, 230°C/W junction-to-ambient thermal resistance. Pin 1 = GND, Pin 2 = OUT, Pin 3 = IN (top view).

Pin/Terminal	Circuit Role	Design Meaning
IN (Pin 3)	Input voltage supply terminal	Accepts 2V–6V input; requires ≥1µF ceramic bypass capacitor placed adjacent to minimize high-frequency noise coupling.
OUT (Pin 2)	Regulated output voltage terminal	Delivers stable 2.0V; connects directly to load and output capacitor; trace routing must minimize inductance for transient response.
GND (Pin 1)	Power ground reference	Common return path for input/output capacitors and load; must be tied to low-impedance ground plane to maintain PSRR and stability.

Key Features

Feature	Design Value
Ultra-low quiescent current	65µA across full input range and load - extends battery runtime in always-on sensor nodes and wearable devices.
Fast transient response	Stable output during 0–300mA load steps with minimal overshoot/undershoot - supports GSM/TDMA baseband ICs with pulsed current demands.
Integrated protection	Current limit (400–600mA), short-circuit clamp (~100mA), and thermal shutdown (140°C) - eliminates need for external fault-handling circuitry.
No minimum load requirement	Maintains regulation at 0mA output - simplifies design for intermittent-load applications like remote controls or wake-on-event peripherals.
Low-ESR capacitor support	Stable with 10–200mΩ ESR ceramic capacitors - enables use of small, reliable, high-frequency decoupling caps instead of larger, aging-prone alternatives.

Applications

Wireless LAN Cards

XDSL Routers

Use Scenario: Powering 2.0V RF transceiver ICs and baseband processors in 802.11b/g/n client adapters.

IC Role / Device Role / Timing Role: Primary 2.0V LDO supplying clean, low-noise power to sensitive RF sections during burst transmit/receive cycles.

Use Value: Fast transient response prevents voltage droop-induced packet errors; 65dB PSRR rejects switching noise from nearby DC-DC converters.

Use Scenario: Regulating 2.0V supply for DSL line driver amplifiers and analog front-end circuits.

IC Role / Device Role / Timing Role: Low-noise, high-stability voltage source ensuring signal integrity in high-speed analog data paths.

Use Value: ±2% output accuracy maintains ADC reference stability; low dropout enables operation from shared 3.3V intermediate rail.

Battery-Powered Equipment

Notebook Computers

Use Scenario: Supplying 2.0V to microcontroller cores or real-time clocks in handheld test meters and portable medical monitors.

IC Role / Device Role / Timing Role: Standby-mode LDO delivering regulated voltage with ultra-low IQ to maximize battery service life.

Use Value: 65µA quiescent current reduces self-discharge; no minimum load allows direct connection to low-duty-cycle logic.

Use Scenario: Providing 2.0V bias to USB 3.0 PHYs or PCIe clock buffers in ultrabook motherboard power trees.

IC Role / Device Role / Timing Role: Secondary LDO generating clean, isolated 2.0V rail from main 3.3V or 5V system bus.

Use Value: 80µs start-up enables rapid link training; thermal shutdown protects against localized hot spots near high-speed interfaces.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2002E/TT (Microchip)	250mA max output, 1.6µA IQ, SOT23-3 package with identical pinout (IN-GND-OUT)	Lower current capability but superior quiescent current; not suitable for 300mA peak loads	Select when ultra-low IQ dominates over output current; verify thermal margin at 300mA.
TPS7A0520PDBVR (TI)	200mA max output, 25µA IQ, 170mV dropout at 200mA, SOT23-5 (with EN pin)	Requires enable control and additional decoupling; higher integration but different footprint and pin count	Choose when system-level power sequencing is required; redesign PCB layout needed due to 5-pin configuration.

Compared with MCP1700T-2002E/TT and TPS7A0520PDBVR, the AP7333-20SRG-7 uniquely balances 300mA drive capability, 65µA IQ, and SOT23R pin compatibility-making it optimal for space-constrained, battery-operated designs needing robust transient performance without enable logic.

Availability

AP7333-20SRG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and battery-powered equipment requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7333-20SRG-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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP7333 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for portable and battery-powered applications where extended runtime, fast transient response, and minimal board space are critical design constraints.

FAQ

What is the maximum input voltage rating for AP7333-20SRG-7?

The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V. Exceeding 6V may trigger internal protection or degrade long-term reliability. The device's 300mV dropout at 300mA means it can regulate 2.0V output down to a 2.3V input, making it ideal for single-cell lithium or two-cell alkaline systems.

Does AP7333-20SRG-7 require an external output capacitor?

Yes - a minimum 1µF X7R or X5R ceramic capacitor is required between OUT and GND for stability and transient response. The device is optimized for low-ESR ceramics (10–200mΩ); larger values (up to 4.7µF) improve load-step immunity but are not mandatory. No minimum load capacitance beyond this is needed.

How does the thermal shutdown behavior work on AP7333-20SRG-7?

Thermal shutdown activates at approximately 140°C junction temperature, disabling the output until the die cools to ~125°C (15°C hysteresis). Under sustained overload, this causes controlled on/off cycling to limit average power dissipation. With θJA = 230°C/W in SOT23R, continuous 300mA operation at 2.3V input requires adequate copper area to avoid triggering shutdown in still-air conditions.

Can AP7333-20SRG-7 be used in place of AP7333-20SAG-7?

Yes - both share identical electrical specifications and 2.0V output, but differ only in package: AP7333-20SRG-7 uses SOT23R (pin 1 = GND, pin 2 = OUT, pin 3 = IN), whereas AP7333-20SAG-7 uses standard SOT23 (pin 1 = IN, pin 2 = OUT, pin 3 = GND). PCB layout must match the correct pinout; they are not drop-in replacements without footprint revision.

AP7333-20SRG-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:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.55V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 75 µA

Current - Supply (Max):: 85 µA

PSRR:: 65dB (100Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT23R

AP7333-20SRG-7 FAQ

1.How can I place an order for AP7333-20SRG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7333-20SRG-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 AP7333-20SRG-7 reliable?

The price and inventory of AP7333-20SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-20SRG-7 is usually 5 days.

3.What payment methods are accepted for AP7333-20SRG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-20SRG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7333-20SRG-7?

AP7333-20SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7333-20SRG-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 AP7333-20SRG-7?

For technical support, including AP7333-20SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-20SRG-7 requirements.

6.How does Aetrix verify that AP7333-20SRG-7 is sourced from the original manufacturer or authorized distributors?

All AP7333-20SRG-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 AP7333-20SRG-7 meets industry standards.

7.What is the process for return or replacement of AP7333-20SRG-7?

All AP7333-20SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-20SRG-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 AP7333-20SRG-7 part is unused and in its original packaging.

Return procedure for AP7333-20SRG-7:

1.Submit a request within 90 days.

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

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