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

Diodes Incorporated AP7353-30FS4-7

Name: AP7353-30FS4-7
Brand: Diodes Incorporated
SKU: AP7353-30FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7353-30FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7353-30FS4-7.pdf

Description:: LDO CMOS LOWCURR X2-DFN1010-4 (T

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Product details

Overview

AP7353-30FS4-7 from Diodes Incorporated is a 3.0V fixed-output, 250mA low-dropout linear regulator with ±1% output accuracy, 90dB PSRR at 1kHz, 10µV_rms output noise (10Hz–100kHz), and 18µA typical quiescent current. It employs CMOS process technology, integrates enable control and thermal shutdown, and targets RF supply rails and battery-powered portable media devices requiring stable, low-noise voltage regulation.

For engineers reviewing the AP7353-30FS4-7 datasheet, AP7353-30FS4-7 pinout, AP7353-30FS4-7 application, or AP7353-30FS4-7 equivalent, key selection criteria include dropout voltage at 250mA (≤119mV for 3.0V output), EN logic thresholds (0.4V max low, 1.2V min high), thermal resistance (θ_JA = 237°C/W), and compatibility with 1µF ceramic output capacitors.

Technical Context

The AP7353-30FS4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its non-discharge configuration avoids automatic output discharge during shutdown, preserving downstream capacitor charge for fast wake-up sequences in portable systems.

It operates across 2.0V–5.5V input range and delivers regulated 3.0V output with load regulation of 0.004%/mA (Type B package) and line regulation of 0.02%/V. Fast transient response-evidenced by ≤20µs load step recovery-is enabled by internal compensation optimized for 1µF ceramic output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.0V ±1% - ensures precise biasing for 3.0V I/O domains and analog subsystems without external feedback.
Max Output Current	250mA - supports moderate-power RF ICs, camera modules, and baseband processors in compact wearables.
PSRR	90dB @ 1kHz, 70dB @ 10kHz - suppresses switching noise from PMICs or DC-DC converters feeding the LDO input.
Output Noise	10µV_rms (10Hz–100kHz) - minimizes phase noise in VCOs and jitter in ADC clock paths.
Quiescent Current	18µA typical - extends battery life in always-on sensor nodes and standby modes of handheld devices.
Dropout Voltage	119mV max @ 250mA, 3.0V V_OUT - enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline sources.
Enable Threshold	V_EN(H) ≥ 1.2V, V_EN(L) ≤ 0.4V - compatible with 1.8V/3.3V GPIOs without level-shifting.

Pinout & Package

X2-DFN1010-4 (Type B) package: 1.0mm × 1.0mm, 0.65mm pitch, exposed pad (EP) for thermal dissipation. Requires PCB copper area connected to GND for optimal θ_JA = 237°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (OUT)	Regulated Power Output	Delivers stable 3.0V to load; must be decoupled with ≥1µF X7R/X5R ceramic capacitor placed adjacent to pin.
2 (GND)	Ground Reference	Primary return path for load current and internal circuitry; connects directly to PCB ground plane to minimize impedance.
3 (EN)	Enable Control Input	Active-high digital control: ≥1.2V enables regulation, ≤0.4V disables output and reduces I_Q to 0.1µA.
4 (IN)	Unregulated Power Input	Accepts 2.0–5.5V supply; requires ≥1µF ceramic decoupling capacitor placed within 2mm of pin.
EP	Thermal Pad	Not electrically functional; must be soldered to large GND copper area to dissipate heat and maintain T_J ≤ 125°C.

Key Features

Feature	Design Value
Ultra-low noise output	10µV_rms (10Hz–100kHz) - preserves signal integrity in RF front-ends and precision analog sensors.
High PSRR at audio frequencies	90dB @ 1kHz - rejects ripple from buck converter switching at 1MHz±harmonics when used in cascade configurations.
Low-quiescent-current shutdown	0.1µA standby current - enables microamp-level system sleep states in IoT edge nodes.
Stable with minimal output capacitance	1µF ceramic (X7R/X5R) - reduces BOM count and PCB area vs. traditional LDOs requiring ≥10µF tantalum.
Fast load transient response	≤20µs recovery from 1mA ↔ 250mA step - maintains voltage stability during burst-mode processor activity.

Applications

Smartphone RF Supply

Wearable Camera Module

Use Scenario: Powers RF transceiver ICs (e.g., LTE/Wi-Fi front-end modules) in space-constrained smartphone PCBs.

IC Role / Device Role / Timing Role: Provides clean 3.0V bias to PA drivers and LNA stages, isolating them from noisy system PMIC rails.

Use Value: 90dB PSRR prevents AM-to-PM distortion in power amplifiers; 10µV_rms noise avoids reciprocal mixing in receivers.

Use Scenario: Supplies image sensor and ISP core voltage in compact fitness trackers and smart glasses.

IC Role / Device Role / Timing Role: Delivers low-noise 3.0V to CIS analog front-end and ADC reference, synchronized with frame capture timing.

Use Value: 18µA quiescent current extends battery runtime between image captures; fast transient response prevents frame corruption during auto-exposure changes.

Portable Media Player Audio Codec

Wireless Adapter Baseband

Use Scenario: Powers DAC/ADC section of stereo audio codec in Bluetooth headphones and portable speakers.

IC Role / Device Role / Timing Role: Low-noise 3.0V source for audio signal chain, referenced to system ground with minimal EMI coupling.

Use Value: 10µV_rms noise translates to >100dB SNR in 24-bit audio paths; ±1% accuracy ensures consistent gain calibration across production units.

Use Scenario: Supplies 3.0V to baseband processor and memory interface in USB Wi-Fi dongles and BLE modules.

IC Role / Device Role / Timing Role: Regulates voltage for DDR I/O and CPU cores during variable-load packet transmission bursts.

Use Value: 250mA capability handles peak transmit current; 119mV dropout allows direct use of 3.3V system rail without intermediate conversion loss.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3002E/TO	300mA rated, 6µA I_Q, but only 60dB PSRR @ 1kHz and 40µV_rms noise.	Lacks RF-grade noise/PSRR performance; suitable for digital-only loads, not analog/RF.	Select when ultra-low I_Q dominates over noise/PSRR requirements.
Torex XC6210B302MR-G	200mA rated, 12µA I_Q, 75dB PSRR @ 1kHz, 25µV_rms noise, DFN1010-4 package.	Lower current and PSRR limit use in high-dynamic RF sections; acceptable for sensor interfaces.	Choose for cost-sensitive designs where 200mA and moderate noise are sufficient.

Compared with MCP1700-3002E/TO and XC6210B302MR-G, the AP7353-30FS4-7 uniquely balances 250mA drive, 90dB PSRR, and 10µV_rms noise in a 1.0mm² footprint-making it the only option qualified for simultaneous RF supply and audio codec regulation in miniaturized portable systems.

Availability

AP7353-30FS4-7 is available at Aetrix Electronics and suitable for smartphone RF supplies, wearable camera modules, and portable media player audio codecs requiring stable component supply, long-term manufacturability, and RoHS-compliant green packaging.

Supply support for AP7353-30FS4-7 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 power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP7353 belongs to Diodes' high-PSRR, low-noise LDO product line, designed specifically for noise-sensitive applications in portable wireless devices where battery efficiency and signal purity are co-prioritized.

FAQ

What is the maximum allowable input voltage for AP7353-30FS4-7?

The absolute maximum input voltage is 6.0V, but recommended operating range is 2.0V to 5.5V. Exceeding 5.5V risks permanent damage per Absolute Maximum Ratings. For 3.0V output, minimum input is 3.119V (3.0V + 119mV dropout) at 250mA load to maintain regulation.

Does AP7353-30FS4-7 include output discharge functionality?

No. AP7353-30FS4-7 is the non-discharge variant (standard AP7353, not AP7353D). When disabled via EN pin, the output remains floating and retains charge on downstream capacitors-enabling fast wake-up without recharging delays.

Can AP7353-30FS4-7 operate with a 0.7µF output capacitor?

Yes, 0.7µF is the minimum effective capacitance specified for stability, accounting for temperature, DC bias, and tolerance derating. However, Diodes recommends 1µF X7R/X5R ceramic for guaranteed margin across all conditions and optimal transient response.

What is the thermal pad (EP) connection requirement for X2-DFN1010-4?

The exposed pad must be soldered to a PCB copper area connected to GND. This is mandatory for thermal performance: omitting it raises θ_JA beyond 237°C/W, risking thermal shutdown at <150mA load. No electrical function is assigned to EP-it is strictly for heat conduction.

AP7353-30FS4-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-XDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.15V @ 250mA

Current - Output:: 250mA

Current - Quiescent (Iq):: 27 µA

Current - Supply (Max):: -

PSRR:: 90dB ~ 70dB (100Hz ~ 10kHz)

Control Features:: Current Limit, Enable

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

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: X2-DFN1010-4 (Type B)

AP7353-30FS4-7 FAQ

1.How can I place an order for AP7353-30FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7353-30FS4-7 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 AP7353-30FS4-7 reliable?

The price and inventory of AP7353-30FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7353-30FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7353-30FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7353-30FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7353-30FS4-7?

AP7353-30FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7353-30FS4-7 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 AP7353-30FS4-7?

For technical support, including AP7353-30FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7353-30FS4-7 requirements.

6.How does Aetrix verify that AP7353-30FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7353-30FS4-7 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 AP7353-30FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7353-30FS4-7?

All AP7353-30FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7353-30FS4-7, 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 AP7353-30FS4-7 part is unused and in its original packaging.

Return procedure for AP7353-30FS4-7:

1.Submit a request within 90 days.

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

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