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

Diodes Incorporated AP7353-28CV4-7

Name: AP7353-28CV4-7
Brand: Diodes Incorporated
SKU: AP7353-28CV4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7353-28CV4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XFBGA, WLBGA

Datasheet:: AP7353-28CV4-7.pdf

Description:: LDO CMOS LOWCURR X1-WLB0707-4 T&

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Product details

Overview

AP7353-28CV4-7 from Diodes Incorporated is a 250mA low-dropout linear regulator with fixed 2.8V output, ±1% accuracy, 90dB PSRR at 1kHz, 10µV_rms output noise (10Hz–100kHz), and 18µA typical quiescent current. It features CMOS-based architecture, enable control, thermal shutdown, and short-circuit protection - deployed in battery-powered RF supplies and portable media players requiring stable, low-noise bias.

For engineers reviewing the AP7353-28CV4-7 datasheet, AP7353-28CV4-7 pinout, AP7353-28CV4-7 application, or AP7353-28CV4-7 equivalent, key selection criteria include dropout voltage at 250mA (152mV typ. for 2.8V output), EN logic thresholds (0.4V low / 1.2V high), thermal resistance (150°C/W), and compatibility with 1µF ceramic output capacitors.

Technical Context

The AP7353-28CV4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current-limit circuit, and thermal shutdown. Its non-discharge configuration avoids automatic output discharge during disable, preserving downstream capacitor charge.

It operates across 2.0V–5.5V input range with guaranteed 250mA output current and supports fast load transient response due to low output impedance and optimized internal compensation - critical for RF supply rails where line/load regulation must stay within ±0.02%/V and ±0.001%/mA respectively.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±1% - ensures precise biasing for 2.8V logic or analog circuitry without external feedback.
Max Output Current	250mA - sufficient to power baseband processors, camera modules, or RF front-end ICs in portable devices.
PSRR	90dB at 1kHz (10mA load) - suppresses switching noise from PMICs or DC-DC converters feeding the LDO input.
Output Noise	10µV_rms (10Hz–100kHz) - enables clean power for sensitive RF receivers and ADC reference supplies.
Quiescent Current	18µA typical - extends battery life in always-on wearable sensors or Bluetooth LE subsystems.
Dropout Voltage	152mV typical at 250mA (2.8V output) - allows operation from single-cell Li-ion (3.0V min) with margin.
Enable Threshold	EN high ≥1.2V, low ≤0.4V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

X1-WLB0707-4 (Type A1) wafer-level chip-scale package (0.7mm × 0.7mm, 0.395mm height) with 4 solder bumps and exposed thermal pad (EP). Optimized for ultra-compact PCB layouts in space-constrained wearables and IoT edge nodes.

Pin/Terminal	Circuit Role	Design Meaning
IN (Bump 1)	Power Input	Accepts 2.0V–5.5V input; requires local 1µF ceramic decoupling placed adjacent to minimize trace inductance.
EN (Bump 2)	Enable Control	Active-high logic input; must be driven - floating state disables regulator and increases standby current to <1.0µA.
GND (Bump 3)	Ground Reference	Primary return path for load current and internal circuits; connects to EP for thermal conduction.
OUT (Bump 4)	Regulated Output	Delivers 2.8V ±1% to load; requires 1µF X7R/X5R ceramic capacitor within 2mm for stability and transient response.
EP	Thermal Pad	Not electrically functional; must connect to large copper pour tied to GND for θ_JA = 150°C/W performance.

Key Features

Feature	Design Value
High PSRR at 1kHz	90dB - maintains RF signal integrity by rejecting ripple from noisy system power rails.
Ultra-Low Quiescent Current	18µA typical - reduces no-load power loss in battery-backed real-time clock or sensor hub applications.
Low Output Noise	10µV_rms (10Hz–100kHz) - eliminates audible noise in audio codecs and quantization noise in precision ADCs.
Fast Load Transient Response	20µs settling time (1mA ↔ 250mA step) - prevents brownout during burst-mode wireless transmission.
Short-Circuit Protection	Clamps output current to ~350mA - prevents thermal runaway when output is accidentally shorted to GND.

Applications

Smartphone Baseband Supply

RF Front-End Bias

Use Scenario: Powering 2.8V I/O interface and memory controller in smartphone application processors.

IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering stable 2.8V rail after buck converter.

Use Value: ±1% output accuracy and 90dB PSRR prevent timing jitter in DDR I/O and data corruption under dynamic load.

Use Scenario: Supplying LNA and mixer stages in 5GHz Wi-Fi 6 front-end modules.

IC Role / Device Role / Timing Role: Clean bias source isolating RF section from digital supply noise.

Use Value: 10µV_rms noise floor preserves receiver sensitivity; 250mA capacity supports peak transmit current.

Wearable Heart Rate Sensor

Portable Media Player Audio Codec

Use Scenario: Powering optical PPG sensor ASIC and analog front-end in fitness bands.

IC Role / Device Role / Timing Role: Always-on LDO supplying precision analog circuitry during sleep mode.

Use Value: 18µA quiescent current extends battery runtime beyond 7 days; 152mV dropout enables use of aging Li-poly cells.

Use Scenario: Providing 2.8V reference and analog supply to stereo DAC/ADC in MP3 players.

IC Role / Device Role / Timing Role: Low-noise analog domain regulator decoupled from digital core supply.

Use Value: Sub-10µV_rms noise eliminates audible hiss; ±0.001%/mA load regulation prevents distortion during volume changes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2802E/TT	250mA max, 6µA IQ, but only 65dB PSRR at 1kHz and 40µV_rms noise.	Lacks RF-grade noise/PSRR performance; suitable for non-sensitive digital I/O rails only.	Choose when ultra-low IQ dominates over noise/PSRR requirements.
Torex XC6210B282MR-G	200mA max, 1% accuracy, 12µV_rms noise, but 1.8V–6.0V input range and no enable pin.	Requires external enable circuitry; lower current limit restricts use in high-power RF stages.	Prefer when enable control is unnecessary and footprint matches DFN1010.

Compared with MCP1700T-2802E/TT and XC6210B282MR-G, the AP7353-28CV4-7 uniquely balances 250mA drive, 90dB PSRR, 10µV_rms noise, and 18µA IQ in a 0.7mm × 0.7mm WLCSP - making it optimal for miniaturized RF and portable audio systems where all four parameters are simultaneously critical.

Availability

AP7353-28CV4-7 is available at Aetrix Electronics and suitable for smartphone baseband supplies, RF front-end biasing, and wearable sensor power management requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for AP7353-28CV4-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the US, and manufacturing in ISO/TS 16949-certified facilities.

The AP7353 series targets portable and battery-powered applications demanding high PSRR, low noise, and minimal quiescent current - specifically engineered for RF, imaging, and always-on sensor subsystems in consumer and IoT devices.

FAQ

What is the recommended output capacitor for AP7353-28CV4-7?

A 1µF X7R or X5R ceramic capacitor placed within 2mm of the OUT and GND pins is required for stability and optimal transient response. The minimum effective capacitance is 0.7µF (accounting for DC bias and temperature derating), and ESR must remain below 2Ω. Larger values improve load step recovery but do not affect basic stability.

Does AP7353-28CV4-7 include thermal shutdown protection?

Yes - the device integrates thermal shutdown that activates at +125°C junction temperature, disabling the output until die temperature falls below the hysteresis threshold. This protection is independent of current limit and operates even during EN=low (shutdown) state if ambient conditions cause excessive self-heating.

Can the EN pin be left unconnected?

No - the EN pin must never float. An unconnected EN pin causes undefined behavior and may result in erratic enable/disable cycling or increased standby current. If enable functionality is unused, tie EN directly to IN to maintain permanent on-state operation.

Is AP7353-28CV4-7 qualified for automotive applications?

No - AP7353-28CV4-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7353Q series) with PPAP documentation, IATF 16949 manufacturing, and extended temperature validation. This part is intended for commercial portable electronics only.

AP7353-28CV4-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-XFBGA, WLBGA

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):: 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.152V @ 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:: X1-WLB0707-4 (Type A1)

AP7353-28CV4-7 FAQ

1.How can I place an order for AP7353-28CV4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7353-28CV4-7 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 AP7353-28CV4-7 reliable?

The price and inventory of AP7353-28CV4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7353-28CV4-7 is usually 5 days.

3.What payment methods are accepted for AP7353-28CV4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7353-28CV4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7353-28CV4-7?

AP7353-28CV4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7353-28CV4-7 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 AP7353-28CV4-7?

For technical support, including AP7353-28CV4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7353-28CV4-7 requirements.

6.How does Aetrix verify that AP7353-28CV4-7 is sourced from the original manufacturer or authorized distributors?

All AP7353-28CV4-7 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 AP7353-28CV4-7 meets industry standards.

7.What is the process for return or replacement of AP7353-28CV4-7?

All AP7353-28CV4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7353-28CV4-7, 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 AP7353-28CV4-7 part is unused and in its original packaging.

Return procedure for AP7353-28CV4-7:

1.Submit a request within 90 days.

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

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