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

Diodes Incorporated AP7333-15SRG-7

Name: AP7333-15SRG-7
Brand: Diodes Incorporated
SKU: AP7333-15SRG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7333-15SRG-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7333-15SRG-7.pdf

Description:: IC REG LINEAR 1.5V 300MA SOT23R

Quantity:: RFQ Add To RFQ list

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Inventory:3,476

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Product details

Overview

AP7333-15SRG-7 from Diodes Incorporated is a 300mA fixed-output (1.5V) 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 primary power supply for battery-powered microcontrollers and RF ICs in portable wireless equipment.

For engineers reviewing the AP7333-15SRG-7 datasheet, AP7333-15SRG-7 pinout, AP7333-15SRG-7 application, or AP7333-15SRG-7 equivalent, key selection criteria include low-I_Q performance across 2–6V input range, fast 80µs startup under 300mA load, thermal shutdown at 140°C, and compatibility with minimal 1µF output capacitance.

Technical Context

The AP7333-15SRG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown) in a single die. Its architecture enables stable regulation without minimum load and supports rapid transient response from 0 to 300mA.

Designed for input voltages from 2V to 6V, it delivers precise 1.5V ±2% output with line regulation of 0.01–0.20%/V and load regulation of ±0.6% across 1–300mA. The device operates over –40°C to +85°C ambient and shuts down at 140°C junction temperature with 15°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±2% - ensures stable core voltage for 1.5V logic or analog subsystems
Max Output Current	300mA continuous - powers small microcontrollers, sensors, or RF front-ends
Quiescent Current	65µA typical at full load - extends battery life in always-on IoT endpoints
Dropout Voltage	300mV typical at 300mA - enables operation down to 1.8V input for single-cell Li-ion or alkaline systems
PSRR	65dB typical at 100Hz - suppresses low-frequency noise from switching DC/DC stages
Start-up Time	80µs - supports rapid wake-up from deep sleep in energy-harvesting nodes
Thermal Shutdown	140°C threshold with 15°C hysteresis - prevents permanent damage during sustained overload

Pinout & Package

SOT23R package: 3-pin surface-mount, RoHS-compliant, green molding compound, 230°C/W junction-to-ambient thermal resistance.

Pin/Terminal	Circuit Role	Design Meaning
IN (Pin 3)	Input voltage supply	Accepts 2–6V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin
OUT (Pin 2)	Regulated output	Delivers stable 1.5V; compatible with 1–4.7µF X7R/X5R ceramic capacitors
GND (Pin 1)	Power ground reference	Common return path for IN and OUT; must connect to low-impedance PCB ground plane

Key Features

Feature	Design Value
No minimum load requirement	Maintains regulation at 0mA output - eliminates need for bleeder resistors in standby mode
Fast transient response	Stabilizes within microseconds during 0→300mA load steps - prevents brownout in GSM/TDMA burst-mode circuits
Short-circuit current limit	Clamps to ~100mA when V_OUT < 200mV - protects against accidental GND shorts during board assembly
Low ESR capacitor support	Stable with 10–200mΩ output capacitor ESR - enables use of compact, low-profile MLCCs
Green packaging	Halogen-free, RoHS-compliant molding compound - meets IPC-1752A environmental compliance requirements

Applications

Wireless LAN Modules

XDSL Router Power Rails

Use Scenario: Powering 2.4GHz/5GHz WLAN baseband ICs and RF transceivers in compact client adapters.

IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying digital core and I/O domains of Wi-Fi SoCs.

Use Value: 65µA I_Q minimizes idle power draw; 80µs startup enables rapid channel-switching without supply delay.

Use Scenario: Generating clean 1.5V bias for ADSL/VDSL line drivers and analog front-end components.

IC Role / Device Role / Timing Role: Low-noise post-regulator after buck converter, rejecting switching ripple via 65dB PSRR.

Use Value: Stable 1.5V output maintains SNR in high-speed line coding; thermal shutdown prevents latch-up during surge events.

Battery-Powered Keyboards

Industrial Sensor Nodes

Use Scenario: Supplying BLE MCU and mechanical switch matrix in ultra-low-power wireless keyboards.

IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and wake-on-keypress circuitry.

Use Value: 300mV dropout allows operation until single AA cell reaches 1.8V; no-load stability eliminates leakage paths.

Use Scenario: Powering precision ADCs, temperature sensors, and LoRaWAN transceivers in field-deployed nodes.

IC Role / Device Role / Timing Role: Isolated 1.5V rail decoupled from noisy system bus, enabling sub-mV measurement accuracy.

Use Value: 1µF ceramic stability reduces BOM count; –40°C to +85°C rating ensures outdoor reliability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1502E/TT	250mA max output, 1.8µA I_Q, SOT23-3 package (IN-GND-OUT pinout)	Limited to lighter loads; superior I_Q but lower PSRR (55dB @ 100Hz)	Select for ultra-low-power sensor nodes where 250mA headroom suffices and 1.8µA I_Q outweighs PSRR needs.
TPS70615DRVR	200mA max output, 1.3µA I_Q, 45dB PSRR @ 100Hz, WSON-6 package	Requires external enable and different footprint; lower current capability limits use in RF power stages	Prefer for space-constrained designs needing nanoscale I_Q, provided load does not exceed 200mA and layout accommodates WSON-6.

Compared with MCP1700T-1502E/TT and TPS70615DRVR, the AP7333-15SRG-7 delivers higher output current (300mA), better PSRR (65dB), and proven fast transient response-making it optimal for RF and burst-mode digital loads where both current headroom and noise rejection are critical.

Availability

AP7333-15SRG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL router power rails, and battery-powered keyboards requiring stable component supply with guaranteed long-term availability.

Supply support for AP7333-15SRG-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.

The AP7333 series belongs to Diodes' low-quiescent-current LDO portfolio, engineered specifically for battery-powered and energy-sensitive applications demanding high PSRR, fast transient response, and robust thermal protection.

FAQ

What is the recommended input capacitor for AP7333-15SRG-7?

A minimum 1µF X7R ceramic capacitor is required between IN and GND, placed as close as possible to the device. Larger values improve noise rejection; low-ESR types reduce required capacitance. Wide copper traces for IN and GND minimize impedance and enhance stability under dynamic load conditions.

Does AP7333-15SRG-7 require an output capacitor to operate?

Yes, a 1–4.7µF X7R or X5R ceramic capacitor is mandatory at the OUT pin for stability and transient response. The device is optimized for low-ESR capacitors (10–200mΩ); omitting or undersizing this capacitor causes oscillation or excessive overshoot during load steps.

How does the thermal shutdown behave under sustained overload?

When junction temperature reaches ~140°C, the output disables and remains off until temperature drops to ~125°C, then re-enables. This hysteresis prevents rapid cycling. Under continuous overload, the device enters thermal limiting mode, delivering reduced average current while protecting internal circuitry from permanent damage.

Can AP7333-15SRG-7 be used with lithium coin cells?

Yes - its 2V minimum input and 300mV dropout allow operation down to 1.8V, matching the discharge curve of CR2032 (2.0–3.0V). Combined with 65µA quiescent current, it enables multi-year battery life in low-duty-cycle sensor nodes powered by single coin cells.

AP7333-15SRG-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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

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

AP7333-15SRG-7 FAQ

1.How can I place an order for AP7333-15SRG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7333-15SRG-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 AP7333-15SRG-7 reliable?

The price and inventory of AP7333-15SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-15SRG-7 is usually 5 days.

3.What payment methods are accepted for AP7333-15SRG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-15SRG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7333-15SRG-7?

AP7333-15SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7333-15SRG-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 AP7333-15SRG-7?

For technical support, including AP7333-15SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-15SRG-7 requirements.

6.How does Aetrix verify that AP7333-15SRG-7 is sourced from the original manufacturer or authorized distributors?

All AP7333-15SRG-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 AP7333-15SRG-7 meets industry standards.

7.What is the process for return or replacement of AP7333-15SRG-7?

All AP7333-15SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-15SRG-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 AP7333-15SRG-7 part is unused and in its original packaging.

Return procedure for AP7333-15SRG-7:

1.Submit a request within 90 days.

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

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