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

Diodes Incorporated AP7331-10SNG-7

Name: AP7331-10SNG-7
Brand: Diodes Incorporated
SKU: AP7331-10SNG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7331-10SNG-7

Manufacturer:: Diodes Incorporated

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

Package:: 6-UDFN Exposed Pad

Datasheet:: AP7331-10SNG-7.pdf

Description:: IC REG LINEAR 1V 300MA 6DFN2020

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7331-10SNG-7 from Diodes Incorporated is a fixed-output 1.0V, 300mA low-dropout linear regulator in DFN2020-6 package with 65μA quiescent current, 300mV dropout at full load, and fast 80μs startup-designed for power-sensitive applications including wireless LAN cards and battery-powered instrumentation.

For engineers reviewing the AP7331-10SNG-7 datasheet, AP7331-10SNG-7 pinout, AP7331-10SNG-7 application, or AP7331-10SNG-7 equivalent, key selection criteria include low-I_Q operation across 2–6V input range, thermal shutdown at 140°C, PSRR of 65dB at 100Hz, and stability with 1μF ceramic output capacitor.

Technical Context

The AP7331-10SNG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry-including current limit (400–600mA), short-circuit clamp (~100mA), and thermal shutdown with 15°C hysteresis. Its fixed 1.0V output eliminates external feedback resistors.

It operates across -40°C to +85°C ambient, delivers ±2% output accuracy over temperature and load, and maintains regulation down to zero load. The EN pin enables logic-controlled on/off functionality with VIH ≥1.4V and VIL ≤0.4V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.0V ±2% - ensures precise core voltage for low-voltage microcontrollers and RF ICs.
Max Output Current	300mA - supports moderate-power peripherals like Wi-Fi transceivers and sensor interfaces.
Quiescent Current	65μA typical at full load - extends battery life in always-on IoT endpoints and portable meters.
Dropout Voltage	300mV typical at 300mA - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline (2.4V min).
PSRR	65dB at 100Hz - suppresses ripple from noisy DC-DC converters feeding the LDO input.
Startup Time	80μs - allows rapid wake-up from deep-sleep modes in energy-harvesting systems.
Thermal Shutdown	140°C junction threshold - protects against sustained overload in compact PCB layouts.

Pinout & Package

AP7331-10SNG-7 uses the DFN2020-6 (2.0mm × 2.0mm, 0.65mm pitch) thermally enhanced package with exposed thermal pad. Pin 1 (EN) and Pin 3 (IN) are adjacent; Pin 4 (OUT) and Pin 2 (GND) form the primary power path; Pin 5/6 are NC.

Pin/Terminal	Circuit Role	Design Meaning
1 (EN)	Enable input	Active-high logic control: drives high ≥1.4V to enable regulation; ties to IN for always-on operation.
2 (GND)	Ground reference	Power and signal return; must connect directly to low-impedance ground plane for stability and thermal performance.
3 (IN)	Input voltage supply	Accepts 2–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to this pin.
4 (OUT)	Regulated output	Delivers stable 1.0V; requires ≥1μF ceramic capacitor between OUT and GND, placed within 2mm of pins.
5, 6 (NC)	No connection	Unbonded terminals-must remain unconnected and unpopulated on PCB layout.

Key Features

Feature	Design Value
Low ESR capacitor compatibility	Stable with 1–4.7μF X7R/X5R ceramics (10–200mΩ ESR), reducing BOM count and board area.
Fast transient response	Minimal overshoot/undershoot during 1–300mA load steps-critical for GSM/Bluetooth burst-mode operation.
Ultra-low no-load IQ	55μA typical at I_OUT = 0mA - enables multi-year battery life in maintenance-free sensors.
Integrated protection	Current limit, short-circuit clamp, and thermal shutdown operate autonomously without external components.
Green packaging	RoHS-compliant, halogen-free molding compound (no Br/Sb) and lead-free finish per EU Directive 2002/95/EC.

Applications

Wireless LAN Cards

XDSL Routers

Use Scenario: Powering 1.0V RF transceiver ICs and baseband processors in mini-PCIe WLAN modules.

IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean 1.0V supply independent of upstream DC-DC switching noise.

Use Value: 65dB PSRR at 100Hz prevents RF desense; 80μs startup synchronizes with MAC-layer wake events.

Use Scenario: Supplying 1.0V PHY layer logic and analog front-end circuits in ADSL2+ line cards.

IC Role / Device Role / Timing Role: Local point-of-load regulator for noise-sensitive DSL line drivers and ADCs.

Use Value: 300mV dropout enables use of 3.3V rail under brownout; ±2% accuracy ensures ADC reference stability.

Notebook Computer Subsystems

Battery-Powered Test Equipment

Use Scenario: Powering embedded controller (EC) cores and touchpad ASICs in ultra-thin laptop designs.

IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and keyboard interface during S3/S4 sleep states.

Use Value: 65μA quiescent current minimizes standby drain; thermal shutdown prevents overheating in confined chassis.

Use Scenario: Regulating 1.0V supply for precision op-amps and SAR ADCs in handheld multimeters and calibrators.

IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source ensuring measurement repeatability across temperature.

Use Value: ±2% output accuracy and <0.2%/V line regulation maintain calibration integrity despite battery voltage sag.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1002E/MB	250mA max, 1.6μA I_Q, SOT23-5 package, 600mV dropout at 250mA	Lower current capacity; better for sub-100mA sensor nodes where ultra-low I_Q dominates	Select when standby current is critical and load never exceeds 250mA.
Torex XC6206P102MR-G	300mA max, 12μA I_Q, SOT23-5, 400mV dropout at 300mA, no EN pin	No enable control; smaller footprint but lacks system-level power sequencing capability	Select when board space is constrained and EN functionality is unnecessary.

Compared with MCP1700T-1002E/MB and XC6206P102MR-G, AP7331-10SNG-7 uniquely balances 300mA drive, 65μA I_Q, EN control, and DFN2020-6 thermal performance-making it optimal for space-constrained, battery-operated systems requiring both responsiveness and efficiency.

Availability

AP7331-10SNG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and battery-powered test equipment requiring stable component supply, consistent parametric performance, and RoHS-compliant green packaging.

Supply support for AP7331-10SNG-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 communications markets.

The AP7331 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered and energy-efficient applications demanding fast transient response, minimal dropout, and robust fault protection.

FAQ

What is the minimum input voltage required for AP7331-10SNG-7 to regulate 1.0V output at 300mA?

The AP7331-10SNG-7 requires VIN ≥ VOUT + V_DROP. With typical dropout of 300mV at 300mA, minimum input is 1.3V. However, the datasheet specifies 2.0V as absolute minimum operating input to ensure guaranteed performance across temperature and process variation-so 2.0V is the design-minimum for reliable 1.0V regulation at full load.

Can AP7331-10SNG-7 be used without an output capacitor?

No. The AP7331-10SNG-7 requires a minimum 1μF ceramic output capacitor (X7R/X5R, 10–200mΩ ESR) between OUT and GND for stability and transient response. Omitting it causes oscillation, excessive overshoot, and potential damage during load steps. The device is not internally compensated for no-capacitor operation.

Is the EN pin 5V-tolerant when VIN = 3.3V?

No. The EN pin absolute maximum rating is VIN + 0.3V. With VIN = 3.3V, EN must not exceed 3.6V. Applying 5V directly risks permanent damage. If interfacing with 5V logic, use a resistor divider or level-shifter to limit EN voltage to ≤3.6V while maintaining VIH ≥1.4V.

How does thermal shutdown behave under continuous overload?

When junction temperature reaches ~140°C, the AP7331-10SNG-7 disables the pass element and forces OUT to drop. It remains off until junction cools to ~125°C (15°C hysteresis), then re-enables. Under sustained overload, this results in thermal cycling-visible as periodic output voltage toggling-protecting the IC but indicating inadequate heatsinking or excessive power dissipation.

AP7331-10SNG-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-UDFN Exposed Pad

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):: 1V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 300mA

Current - Quiescent (Iq):: 75 µA

Current - Supply (Max):: 85 µA

PSRR:: 65dB (100Hz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: U-DFN2020-6

AP7331-10SNG-7 FAQ

1.How can I place an order for AP7331-10SNG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7331-10SNG-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 AP7331-10SNG-7 reliable?

The price and inventory of AP7331-10SNG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-10SNG-7 is usually 5 days.

3.What payment methods are accepted for AP7331-10SNG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-10SNG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7331-10SNG-7?

AP7331-10SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7331-10SNG-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 AP7331-10SNG-7?

For technical support, including AP7331-10SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-10SNG-7 requirements.

6.How does Aetrix verify that AP7331-10SNG-7 is sourced from the original manufacturer or authorized distributors?

All AP7331-10SNG-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 AP7331-10SNG-7 meets industry standards.

7.What is the process for return or replacement of AP7331-10SNG-7?

All AP7331-10SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-10SNG-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 AP7331-10SNG-7 part is unused and in its original packaging.

Return procedure for AP7331-10SNG-7:

1.Submit a request within 90 days.

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

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