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

Diodes Incorporated AP7353D-29CV4-7

Name: AP7353D-29CV4-7
Brand: Diodes Incorporated
SKU: AP7353D-29CV4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7353D-29CV4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XFBGA, WLBGA

Datasheet:: AP7353D-29CV4-7.pdf

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

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Product details

Overview

AP7353D-29CV4-7 from Diodes Incorporated is a 250mA low-dropout linear regulator with fixed 2.9V output, ±1% accuracy, 90dB PSRR at 1kHz, 10µV_rms output noise (10Hz–100kHz), and 18µA typical quiescent current. It features an enable input, built-in discharge function, and is optimized for RF power supplies and battery-powered portable electronics requiring stable, low-noise voltage regulation.

For engineers reviewing the AP7353D-29CV4-7 datasheet, AP7353D-29CV4-7 pinout, AP7353D-29CV4-7 application, or AP7353D-29CV4-7 equivalent, key selection criteria include dropout voltage at 250mA (71mV typ. for 2.9V output), thermal resistance (150°C/W in X1-WLB0707-4), EN logic thresholds (0.4V max low, 1.2V min high), and compatibility with 1µF ceramic output capacitors.

Technical Context

The AP7353D integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown protection. Its architecture supports fast load transient response (<20µs recovery for 1mA→250mA step) and maintains stability with minimal 0.7µF output capacitance.

Unlike non-discharge variants, the "D" suffix denotes integrated auto-discharge functionality via a 35Ω N-channel MOSFET between OUT and GND during shutdown, ensuring rapid output voltage decay-critical for sequencing-sensitive systems like multi-rail mobile SoCs.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.9V ±1% - eliminates external feedback resistors and ensures consistent rail generation across temperature (-40°C to +85°C).
Max Output Current	250mA - sufficient to power baseband processors, RF transceivers, or camera sensor analog blocks without external boost stages.
PSRR	90dB at 1kHz, 70dB at 10kHz - suppresses switching noise from PMICs or DC-DC converters feeding the LDO input.
Output Noise	10µV_rms (10Hz–100kHz) - enables clean biasing of RF VCOs, ADC references, and low-noise amplifiers.
Quiescent Current	18µA typical - extends battery life in always-on wearable sensors and Bluetooth LE peripherals.
Dropout Voltage	71mV typical at 250mA (2.9V output) - allows operation from single-cell Li-ion (3.0V min) or 3.3V rails with margin.
Enable Threshold	V_EN(H) ≥1.2V, V_EN(L) ≤0.4V - compatible with 1.8V/3.3V GPIOs without level-shifting.

Pinout & Package

AP7353D-29CV4-7 uses the X1-WLB0707-4 (Type A1) wafer-level chip-scale package (0.7mm × 0.7mm, 0.4mm height), featuring a 4-bump layout with exposed die pad for thermal enhancement. PCB layout requires large copper area under the EP connected to GND for optimal thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
IN (Bump 1)	Power Input	Accepts 2.0V–5.5V input; requires 1µF ceramic capacitor placed adjacent to minimize supply impedance and decouple high-frequency noise.
EN (Bump 2)	Enable Control	Active-high logic input; must not float-tie to IN or MCU GPIO; enables fast turn-on (180µs) and controlled shutdown with discharge.
GND (Bump 3)	Ground Reference	Primary return path for input/output currents; connects internally to exposed pad (EP); must be solidly tied to system ground plane.
OUT (Bump 4)	Regulated Output	Delivers 2.9V ±1%; requires 1µF X7R/X5R ceramic capacitor near pin to ensure stability and transient response.
EP (Exposed Pad)	Thermal & Electrical Ground	Not electrically functional as signal terminal; must be soldered to ≥10mm² GND copper area for thermal conduction (θ_JA = 150°C/W).

Key Features

Feature	Design Value
Integrated Output Discharge	35Ω internal NMOS discharges OUT to GND when disabled-eliminates need for external bleed resistor in power-sequenced systems.
Ultra-Low Noise Regulation	10µV_rms noise floor enables direct powering of RF synthesizers and precision analog front-ends without additional filtering.
High PSRR at Switching Frequencies	70dB rejection at 10kHz matches common DC-DC converter ripple frequencies, reducing need for cascaded filtering stages.
Low Dropout at Full Load	71mV typical dropout at 250mA allows use with 3.0V input sources while maintaining 2.9V output-critical for aging battery operation.
Wide Input Range & Precision Accuracy	2.0V–5.5V input range supports single-cell Li-ion, USB, or legacy 3.3V/5V rails; ±1% output tolerance ensures reliable logic-level compliance.

Applications

RF Power Supply

Wearable Sensor Node

Use Scenario: Providing clean 2.9V bias to 2.4GHz BLE transceiver RF sections in compact earbuds.

IC Role / Device Role / Timing Role: Low-noise local LDO supplying VDD_PA and VDD_SYNTH rails, isolating RF circuitry from noisy system PMIC outputs.

Use Value: 10µV_rms noise and 90dB PSRR prevent reciprocal mixing and phase noise degradation in receiver sensitivity.

Use Scenario: Powering ultra-low-power environmental sensor hub (accelerometer, temperature, humidity) in fitness tracker.

IC Role / Device Role / Timing Role: Primary regulated supply enabling <1µA standby current and fast wake-up from deep-sleep mode via EN control.

Use Value: 18µA quiescent current extends coin-cell battery life beyond 12 months; 180µs turn-on time meets real-time sensor sampling deadlines.

Mobile Camera Module

Portable Media Decoder

Use Scenario: Delivering stable 2.9V to CIS analog front-end and image signal processor core in smartphone rear camera.

IC Role / Device Role / Timing Role: Dedicated LDO for noise-sensitive pixel readout and ADC conversion circuitry, synchronized with frame capture timing.

Use Value: Fast load transient response (<20µs) prevents voltage droop during burst pixel readout, eliminating image banding artifacts.

Use Scenario: Regulating 2.9V for audio DAC and headphone amplifier in portable Bluetooth speaker.

IC Role / Device Role / Timing Role: Low-noise post-regulator cleaning up switched-mode supply output before analog audio signal path.

Use Value: 70dB PSRR at 10kHz suppresses Class-D amplifier switching artifacts, achieving >100dB SNR in audio playback.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7361D-29YG-7	Higher output current (600mA), larger X2-DFN1010-4 package, same 2.9V ±1% accuracy and discharge function.	Better suited for higher-current loads (e.g., multi-core microcontrollers), but requires more PCB area and has higher θ_JA (237°C/W).	Select when >250mA peak load or thermal headroom is needed; avoid if space-constrained or battery life is primary concern.
MCP1700T-2902E/TT	250mA, 2.9V ±2% accuracy, no discharge function, 6µA IQ, SOT-23-5 package.	Lacks auto-discharge; requires external resistor for output bleed; lower IQ benefits ultra-long-life applications but increases BOM count.	Choose only if discharge is unnecessary and footprint flexibility (SOT-23) outweighs need for integrated discharge and tighter accuracy.

Compared with AP7353D-29CV4-7, AP7361D-29YG-7 trades smaller size and lower thermal resistance for higher current capability, while MCP1700T-2902E/TT sacrifices discharge integration and accuracy for ultra-low IQ and legacy package compatibility-making AP7353D-29CV4-7 optimal for space-constrained, noise-sensitive, sequenced-power applications.

Availability

AP7353D-29CV4-7 is available at Aetrix Electronics and suitable for RF power supplies, wearable sensor nodes, mobile camera modules, and portable media decoders requiring stable component supply with guaranteed long-term availability.

Supply support for AP7353D-29CV4-7 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 connectivity solutions for consumer, industrial, and automotive markets.

The AP7353 series belongs to Diodes' high-performance LDO portfolio, designed specifically for noise-critical portable electronics where PSRR, output accuracy, and ultra-low quiescent current are essential for battery longevity and signal fidelity.

FAQ

What is the minimum input voltage required for AP7353D-29CV4-7 to maintain regulation at 250mA?

The minimum input voltage is determined by dropout: at 250mA and 2.9V output, typical dropout is 71mV, so VIN must be ≥2.971V. The absolute minimum specified input is 2.0V, but regulation fails below VOUT + dropout. For guaranteed 250mA operation across temperature, VIN ≥3.0V is recommended.

Does AP7353D-29CV4-7 require an external discharge resistor?

No. The "D" suffix indicates integrated auto-discharge via a 35Ω NMOS transistor between OUT and GND. When EN is low, this path actively pulls the output to GND within microseconds-eliminating hold-up voltage and removing the need for external bleed components in power-sequenced designs.

Can AP7353D-29CV4-7 operate with a 0.7µF output capacitor?

Yes-the datasheet specifies 0.7µF as the minimum effective capacitance for stability, accounting for temperature, DC bias, and tolerance derating of X7R/X5R ceramics. However, 1µF is recommended for robust performance across all conditions and optimal transient response.

Is the X1-WLB0707-4 package compatible with standard reflow profiles?

Yes. The X1-WLB0707-4 is rated Moisture Sensitivity Level 1 (MSL-1) per J-STD-020 and supports standard Pb-free reflow profiles (peak 260°C). Its tin-silver-copper finish is solderable per MIL-STD-202, Method 208, and the small 0.7mm × 0.7mm footprint enables high-density placement on fine-pitch PCBs.

AP7353D-29CV4-7 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):: 2.9V

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:: X1-WLB0707-4 (Type A1)

AP7353D-29CV4-7 FAQ

1.How can I place an order for AP7353D-29CV4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7353D-29CV4-7 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 AP7353D-29CV4-7 reliable?

The price and inventory of AP7353D-29CV4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7353D-29CV4-7 is usually 5 days.

3.What payment methods are accepted for AP7353D-29CV4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7353D-29CV4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7353D-29CV4-7?

AP7353D-29CV4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7353D-29CV4-7 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 AP7353D-29CV4-7?

For technical support, including AP7353D-29CV4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7353D-29CV4-7 requirements.

6.How does Aetrix verify that AP7353D-29CV4-7 is sourced from the original manufacturer or authorized distributors?

All AP7353D-29CV4-7 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 AP7353D-29CV4-7 meets industry standards.

7.What is the process for return or replacement of AP7353D-29CV4-7?

All AP7353D-29CV4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7353D-29CV4-7, 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 AP7353D-29CV4-7 part is unused and in its original packaging.

Return procedure for AP7353D-29CV4-7:

1.Submit a request within 90 days.

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

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