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

Diodes Incorporated AP7346D-1528FS6-7

Name: AP7346D-1528FS6-7
Brand: Diodes Incorporated
SKU: AP7346D-1528FS6-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7346D-1528FS6-7

Manufacturer:: Diodes Incorporated

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

Package:: 6-XFDFN Exposed Pad

Datasheet:: AP7346D-1528FS6-7.pdf

Description:: IC REG LIN 1.5V/2.8V X2DFN1212-6

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Product details

Overview

AP7346D-1528FS6-7 from Diodes Incorporated is a dual-channel, high-accuracy current-limiting LDO regulator in X2-DFN1212-6 package, delivering fixed 1.5V and 2.8V outputs with ±1% voltage accuracy, 157mA ±25mA per-channel current limit, and 75dB PSRR at 1kHz. It serves as a low-noise, low-quiescent-power dual supply for RF and camera modules in portable wireless devices.

For engineers reviewing the AP7346D-1528FS6-7 datasheet, AP7346D-1528FS6-7 pinout, AP7346D-1528FS6-7 application, or AP7346D-1528FS6-7 equivalent, key selection criteria include dual independent enable control, output discharge capability, thermal performance in 1.2mm × 1.2mm footprint, and compatibility with 0.47µF ceramic output capacitors.

Technical Context

The AP7346D-1528FS6-7 integrates two independent CMOS-based LDO regulators sharing a single VIN input but featuring separate EN1/EN2 controls and VOUT1/VOUT2 outputs. Each channel includes dedicated current-limit circuitry, auto-discharge NMOS (50Ω), and precision voltage reference.

It operates across 1.7V–5.25V input range with dropout voltages ranging from 0.22V (3.0V < VOUT ≤ 3.6V) to 0.59V (VOUT ≤ 1.2V) at 120mA, and maintains 60µV_rms output noise (10Hz–100kHz) while drawing only 35µA quiescent current per active channel.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltages	Fixed 1.5V (Channel 1) and 2.8V (Channel 2); eliminates external feedback resistors and ensures stable bias for RF transceivers and image sensors.
Current Limit Accuracy	157mA ±25mA per channel; enables predictable overcurrent protection without external sensing, critical for battery-powered fingerprint modules.
Voltage Accuracy	±1% at +25°C, ±1.5% over −40°C to +85°C; guarantees reliable core logic and analog circuit operation under thermal stress.
PSRR	75dB at 1kHz; suppresses switching noise from adjacent DC-DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz); preserves signal integrity in low-noise analog front-ends like camera ISPs and audio codecs.
Quiescent Current	35µA per active channel; extends battery life in always-on sensor subsystems such as biometric authentication circuits.
Enable Thresholds	EN high ≥1.3V, EN low ≤0.5V; compatible with 1.8V/3.3V GPIOs without level-shifting in mobile SoC designs.

Pinout & Package

X2-DFN1212-6 package: 1.2mm × 1.2mm body, 0.4mm pitch, 0.39mm height, thermal pad exposed on bottom for PCB copper thermal relief.

Pin/Terminal	Circuit Role	Design Meaning
1	VOUT1	Regulated 1.5V output; connects directly to power domain of baseband processor I/O or sensor interface logic.
2	VOUT2	Regulated 2.8V output; supplies analog front-end of CMOS image sensor or RF power amplifier bias rail.
3	GND	Common ground reference for both regulators; must be tied to low-impedance PCB ground plane to minimize noise coupling.
4	EN2	Active-high enable for Channel 2; allows independent sequencing-e.g., delay VOUT2 activation until VOUT1 stabilizes.
5	VIN	Shared 1.7V–5.25V input; requires ≥0.47µF ceramic capacitor placed within 2mm of this pin and GND.
6	EN1	Active-high enable for Channel 1; supports dynamic power gating of 1.5V domain during sleep mode to reduce system standby current.

Key Features

Feature	Design Value
Dual independent enable inputs	EN1 and EN2 allow staggered power-up/down sequencing between 1.5V and 2.8V domains, preventing bus contention or latch-up in multi-rail SoCs.
Built-in output discharge	50Ω NMOS auto-discharge path per channel clears residual charge on VOUT pins when disabled, eliminating hold-up voltage that could disrupt downstream logic reset timing.
Low 60µV_rms noise	Enables direct powering of noise-sensitive analog blocks (e.g., ADC reference buffers, PLL VCOs) without additional filtering stages.
Stable with 0.47µF ceramic COUT	Reduces BOM count and PCB area vs. legacy LDOs requiring ≥10µF tantalum; supports ultra-thin mobile form factors.
−40°C to +85°C operation	Validated performance across industrial temperature range, supporting deployment in automotive infotainment displays and ruggedized handhelds.

Applications

Fingerprint Sensor Module

Smartphone Camera Subsystem

Use Scenario: Powering capacitive fingerprint sensor IC and its analog signal conditioning circuitry in compact mobile bezel space.

IC Role / Device Role / Timing Role: Dual LDO provides isolated 1.5V digital core supply and 2.8V analog sensor bias, with independent EN control enabling fast wake-from-sleep response.

Use Value: 60µV_rms noise prevents false touch detection; ±1% accuracy ensures consistent sensor capacitance measurement across temperature.

Use Scenario: Supplying image signal processor (ISP) I/O and CMOS image sensor analog front-end in multi-camera smartphone arrays.

IC Role / Device Role / Timing Role: Delivers clean 1.5V for ISP logic and precise 2.8V for sensor pixel array bias, with 75dB PSRR rejecting noise from nearby PMIC switching rails.

Use Value: Low dropout (0.26V @ 2.1V < VOUT ≤ 2.5V) maximizes battery runtime; 0.47µF COUT support simplifies layout in tight camera module PCBs.

Wireless Communication Adapter

Portable Media Player Audio Stage

Use Scenario: Regulating power for Bluetooth/Wi-Fi combo chip RF section and baseband logic in USB-C dongles or wearables.

IC Role / Device Role / Timing Role: Dual output replaces two discrete LDOs; EN1/EN2 allow host MCU to disable unused radios (e.g., turn off Wi-Fi while Bluetooth active).

Use Value: 157mA ±25mA current limit protects against antenna mismatch faults; 35µA quiescent current extends adapter standby time.

Use Scenario: Powering DAC, headphone amplifier, and audio codec in battery-operated MP3 players with OLED display.

IC Role / Device Role / Timing Role: Supplies 1.5V to digital audio controller and 2.8V to Class AB headphone driver, with independent shutdown minimizing idle power draw.

Use Value: 60µV_rms noise avoids audible hiss in high-gain headphone output; ±1% VOUT accuracy maintains consistent volume calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7345D-1528FS6-7	Successor device with identical pinout, same 1.5V/2.8V outputs, improved current limit tolerance (±15mA vs. ±25mA), and enhanced PSRR (80dB @ 1kHz).	Recommended for new designs; supports tighter regulation in noise-critical RF sections where margin matters.	Select AP7345D if designing for production beyond Q3 2024; AP7346 remains viable for legacy design refresh or cost-sensitive builds.
MCP1826S-1528KE/DB	Microchip dual LDO with 1.5V/2.8V outputs, but no built-in discharge, higher quiescent current (65µA), and larger SOT-23-6 package (2.9mm × 2.8mm).	Suitable for non-sequenced, non-auto-discharge applications where board space is less constrained.	Choose only if AP7346D-1528FS6-7 supply lead time exceeds 12 weeks; verify layout rework for larger footprint and missing discharge path.

Compared with AP7345D-1528FS6-7, the AP7346D-1528FS6-7 offers proven field reliability but looser current limit spec; versus MCP1826S-1528KE/DB, it delivers superior noise performance and 58% smaller footprint at the cost of vendor-specific enable logic.

Availability

AP7346D-1528FS6-7 is available at Aetrix Electronics and suitable for fingerprint sensor modules, smartphone camera subsystems, and wireless communication adapters requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AP7346D-1528FS6-7 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 AP7346 series belongs to Diodes' high-accuracy dual-LDO product line, engineered specifically for space-constrained portable electronics needing independent, low-noise, sequenced power rails with integrated protection and discharge.

FAQ

What is the thermal pad connection requirement for AP7346D-1528FS6-7?

The thermal pad on the underside of the X2-DFN1212-6 package must be connected to a large copper pour tied to GND for optimal heat dissipation. Do not use the pad solely as the GND electrode; instead, connect it via multiple vias to an internal or bottom-layer ground plane. This reduces junction-to-ambient thermal resistance by up to 40°C/W compared to unconnected pads.

Can AP7346D-1528FS6-7 operate with only one channel enabled?

Yes-EN1 and EN2 are fully independent. Driving EN1 high and EN2 low powers only the 1.5V output (VOUT1), while VOUT2 remains at 0V with auto-discharge active. Quiescent current drops to 35µA (not 70µA), and the disabled channel draws only 0.1–1.0µA standby current, making it ideal for dynamic power partitioning in battery systems.

Is AP7346D-1528FS6-7 qualified for automotive applications?

No-AP7346D-1528FS6-7 is not AEC-Q100 qualified. Diodes states that automotive-grade versions require explicit change control, PPAP capability, and manufacturing in IATF 16949-certified facilities. For automotive infotainment or ADAS camera power, contact Diodes directly to request AEC-compliant variants such as AP7346Q-series derivatives.

What minimum output capacitance is required for stability?

The AP7346D-1528FS6-7 is stable with ≥0.47µF ceramic capacitors on both VOUT1 and VOUT2. Lower values (e.g., 0.22µF) may cause ringing under load transients. Use X5R/X7R dielectrics with ≤100mΩ ESR; place each capacitor within 2mm of its respective VOUT pin and GND to maintain phase margin above 60° across −40°C to +85°C.

AP7346D-1528FS6-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-XFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 2

Voltage - Input (Max):: 5.25V

Voltage - Output (Min/Fixed):: 1.5V, 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.44V @ 120mA, 0.3V @ 120mA

Current - Output:: 130mA, 130mA

Current - Quiescent (Iq):: 100 µA

Current - Supply (Max):: -

PSRR:: 75dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: X2-DFN1212-6

AP7346D-1528FS6-7 FAQ

1.How can I place an order for AP7346D-1528FS6-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7346D-1528FS6-7 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 AP7346D-1528FS6-7 reliable?

The price and inventory of AP7346D-1528FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-1528FS6-7 is usually 5 days.

3.What payment methods are accepted for AP7346D-1528FS6-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-1528FS6-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7346D-1528FS6-7?

AP7346D-1528FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7346D-1528FS6-7 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 AP7346D-1528FS6-7?

For technical support, including AP7346D-1528FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-1528FS6-7 requirements.

6.How does Aetrix verify that AP7346D-1528FS6-7 is sourced from the original manufacturer or authorized distributors?

All AP7346D-1528FS6-7 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 AP7346D-1528FS6-7 meets industry standards.

7.What is the process for return or replacement of AP7346D-1528FS6-7?

All AP7346D-1528FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-1528FS6-7, 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 AP7346D-1528FS6-7 part is unused and in its original packaging.

Return procedure for AP7346D-1528FS6-7:

1.Submit a request within 90 days.

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

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