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

Diodes Incorporated AP7333-20SAG-7

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

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Part No.:: AP7333-20SAG-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7333-20SAG-7.pdf

Description:: IC REG LINEAR 2V 300MA SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7333-20SAG-7 from Diodes Incorporated is a 300mA fixed-output (2.0V) low-dropout linear regulator in SOT23 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 ultra-low IQ and fast transient response.

For engineers reviewing the AP7333-20SAG-7 datasheet, AP7333-20SAG-7 pinout, AP7333-20SAG-7 application, or AP7333-20SAG-7 equivalent, key selection criteria include dropout voltage under 300mA load, thermal shutdown threshold (140°C), current limit behavior (400–600mA), and compatibility with minimal 1µF output capacitance in space-constrained designs.

Technical Context

The AP7333-20SAG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown) in a single monolithic IC. Its architecture enables stable regulation without minimum load and supports rapid line/load transients due to optimized internal compensation.

Designed for input voltages from 2V to 6V and fixed 2.0V output, it delivers regulated power with ±2% output accuracy across –40°C to +85°C ambient, while maintaining 55–75µA quiescent current over full input range and zero-to-300mA load.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.0V ±2% - ensures precise rail generation for 2.0V logic or analog subsystems without external feedback.
Max Output Current	300mA continuous - sufficient to power microcontrollers, RF front-ends, or sensor interfaces in portable devices.
Dropout Voltage	300mV typical at 300mA - enables operation down to 2.3V input while sustaining 2.0V output, critical for single-cell Li-ion or alkaline systems.
Quiescent Current	65µA typical at full load - minimizes standby power loss, extending battery life in always-on or duty-cycled applications.
PSRR	65dB typical at 100Hz - suppresses low-frequency supply noise from switching converters or noisy DC/DC stages.
Start-up Time	80µs - allows rapid power sequencing in wake-from-sleep scenarios without system timing violations.
Thermal Shutdown	140°C junction threshold with 15°C hysteresis - provides self-recovery protection during sustained overload or poor PCB thermal design.

Pinout & Package

SOT23-3 package: compact 2.9mm × 1.6mm surface-mount outline with gull-wing leads, RoHS-compliant lead-free finish, and "Green" molding compound (Br/Sb-free).

Pin/Terminal	Circuit Role	Design Meaning
IN (Pin 1)	Input voltage supply	Accepts 2V–6V input; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for stability and noise rejection.
OUT (Pin 2)	Regulated output	Delivers stable 2.0V; supports 1µF–4.7µF ceramic output capacitors with ESR 10–200mΩ for optimal transient response.
GND (Pin 3)	Power ground reference	Common return path for input/output bypassing; must be connected to low-impedance PCB ground plane to minimize noise coupling.

Key Features

Feature	Design Value
No minimum load requirement	Maintains regulation and stability at 0mA output - eliminates need for bleeder resistors in ultra-low-power sleep modes.
Fast load transient response	Stabilizes within microseconds during 0–300mA step changes - prevents voltage droop/overshoot in DSP or GSM baseband power rails.
Short-circuit current limit	Clamps output to ~100mA when V_OUT < 200mV - protects against accidental GND shorts without latch-off or thermal runaway.
Low-ESR capacitor compatibility	Stable with 1µF X7R/X5R ceramics - reduces BOM count and PCB area versus tantalum or electrolytic alternatives.
Thermal cycling recovery	Auto-resumes operation at ~125°C after shutdown - enables graceful degradation rather than permanent fault lockout in thermally constrained enclosures.

Applications

Wireless LAN Modules

XDSL Router Power Rails

Use Scenario: Powering 2.0V RF transceivers and baseband processors in 802.11n/ac mini-PCIe cards.

IC Role / Device Role / Timing Role: Primary LDO supplying clean, low-noise 2.0V bias to WLAN chipset analog sections and PLLs.

Use Value: 65dB PSRR at 100Hz rejects noise from nearby switching regulators; 80µs start-up enables fast channel-hopping synchronization.

Use Scenario: Generating 2.0V auxiliary rail for DSL PHY interface logic and line driver bias in residential gateways.

IC Role / Device Role / Timing Role: Secondary LDO delivering stable 2.0V from a 3.3V intermediate bus, supporting burst-mode ADSL2+ line signaling.

Use Value: 300mV dropout allows operation from marginally regulated 3.3V rails; fast transient response handles DSL line activation surges.

Battery-Powered Keyboards

Industrial Sensor Nodes

Use Scenario: Supplying 2.0V to BLE SoC and touch controller in USB-rechargeable wireless keyboards.

IC Role / Device Role / Timing Role: Main system regulator enabling deep-sleep current <100µA while maintaining instant wake capability.

Use Value: 65µA quiescent current extends coin-cell life beyond 2 years; no-load stability avoids parasitic discharge paths.

Use Scenario: Powering 2.0V precision ADCs and low-power microcontrollers in battery-operated environmental monitors.

IC Role / Device Role / Timing Role: Precision LDO providing ripple-free 2.0V reference for 16-bit SAR ADC conversions.

Use Value: ±2% output accuracy and low noise ensure <0.01% measurement error; thermal shutdown prevents field failure in sealed enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2204-2.0TRG1	Higher IQ (120µA), same 300mA rating and SOT23-3 package; 400mV dropout at 300mA	Lacks short-circuit current limiting; relies on external fuse or upstream current sense	Prefer AP7333-20SAG-7 where robust fault protection and lower IQ are required in battery-sensitive designs.
MCP1700-2002E/TO	250mA max output, 1.6µA IQ, TO-92 package; 600mV dropout at 250mA	Through-hole mounting only; unsuitable for high-density PCBs or automated SMT assembly	Choose AP7333-20SAG-7 for SMT production scalability, higher current headroom, and superior transient performance.

Compared with AP2204-2.0TRG1 and MCP1700-2002E/TO, the AP7333-20SAG-7 uniquely combines ultra-low IQ (65µA), integrated short-circuit/thermal protection, and SOT23-3 manufacturability - making it optimal for compact, battery-dependent systems demanding reliability and efficiency.

Availability

AP7333-20SAG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL router power rails, and battery-powered keyboards requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for AP7333-20SAG-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 energy-constrained applications where extended battery life, fast dynamic response, and robust fault tolerance are essential.

FAQ

What is the maximum input voltage the AP7333-20SAG-7 can tolerate?

The AP7333-20SAG-7 has an absolute maximum input voltage rating of 7V. However, its recommended operating range is 2V to 6V. Exceeding 6V may trigger internal protection circuits or accelerate parametric drift, especially at elevated temperatures. For reliable long-term operation, maintain VIN ≤ 6V with appropriate derating per thermal conditions.

Can the AP7333-20SAG-7 operate without an output capacitor?

No - the AP7333-20SAG-7 requires a minimum 1µF ceramic output capacitor connected between OUT and GND for stability and transient response. Operation without this capacitor risks oscillation, excessive overshoot/undershoot, or thermal shutdown under load. The device is optimized for 1µF–4.7µF X7R/X5R ceramics with ESR between 10mΩ and 200mΩ.

Does the AP7333-20SAG-7 support adjustable output voltage?

No - the AP7333-20SAG-7 is a fixed-output regulator with a factory-trimmed 2.0V output. It lacks feedback pins or external resistor networks for adjustment. For programmable output, Diodes offers the AP7361 series, which supports external resistor dividers and delivers up to 500mA with similar low-IQ performance.

How does the thermal shutdown behave under sustained overload?

When junction temperature reaches ~140°C, the AP7333-20SAG-7 disables the output and enters thermal shutdown. It automatically recovers when temperature falls to ~125°C due to 15°C hysteresis. Under continuous overload, this causes controlled on/off cycling - limiting average power dissipation and preventing permanent damage, though system-level thermal design should avoid repeated cycling.

AP7333-20SAG-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:: SOT-23-3

AP7333-20SAG-7 FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your AP7333-20SAG-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 AP7333-20SAG-7?

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

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

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

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

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

Return procedure for AP7333-20SAG-7:

1.Submit a request within 90 days.

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

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