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

Diodes Incorporated AP7345D-3028RH4-7

Name: AP7345D-3028RH4-7
Brand: Diodes Incorporated
SKU: AP7345D-3028RH4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7345D-3028RH4-7

Manufacturer:: Diodes Incorporated

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

Package:: 8-XFDFN Exposed Pad

Datasheet:: AP7345D-3028RH4-7.pdf

Description:: IC REG LINEAR 3V/2.8V 8DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7345D-3028RH4-7 from Diodes Incorporated is a dual-channel, CMOS-based low-dropout linear regulator delivering fixed 3.0V and 2.8V outputs with ±1% accuracy, 300mA per channel, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and targets power-sensitive RF and digital subsystems in portable electronics.

For engineers reviewing the AP7345D-3028RH4-7 datasheet, AP7345D-3028RH4-7 pinout, AP7345D-3028RH4-7 application, or AP7345D-3028RH4-7 equivalent, key selection criteria include dual independent enable control, thermal shutdown at +150°C, low 50µA quiescent current in single-channel active mode, and X2-DFN1612-8 package compatibility with high-density PCB layouts.

Technical Context

The AP7345D-3028RH4-7 integrates two independent LDO regulators sharing a common ground but with separate VIN, VOUT, and EN pins-enabling asynchronous power sequencing and channel-specific shutdown. Each regulator uses a precision voltage reference, error amplifier, and current-limit circuit with fold-back short-circuit protection (≈55mA).

Its CMOS architecture achieves low dropout (0.25V typical at 3.0V/300mA), low noise via internal filtering, and high PSRR through optimized error amplifier gain and biasing. The device supports auto-discharge via integrated N-channel MOSFETs (30Ω typical on-resistance) when disabled, preventing residual output voltage hold-up.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltages	3.0V (Channel 1), 2.8V (Channel 2); fixed by internal resistor network - eliminates external feedback components and ensures stable, calibrated rail generation.
Output Accuracy	±1% at +25°C, ±1.5% over –40°C to +85°C - enables reliable operation of voltage-sensitive logic and RF circuitry without margining overhead.
PSRR	75dB at 1kHz - suppresses switching noise from upstream DC/DC converters, critical for clean RF supply in wireless adapters and cameras.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise in local oscillators and jitter in high-speed interfaces like MIPI D-PHY.
Quiescent Current	50µA (one channel active, other disabled) - extends battery life in always-on sensor or standby subsystems of smartphones and portable media players.
Dropout Voltage	0.25V (typ) at 3.0V/300mA; 0.22V (typ) at 2.8V/300mA - allows operation from single-cell Li-ion (2.8V min) with headroom for full load regulation.
Enable Thresholds	V_EN-H ≥ 1.3V, V_EN-L ≤ 0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting, simplifying host processor interface.

Pinout & Package

X2-DFN1612-8 (1.6mm × 1.2mm, 0.4mm pitch) with exposed thermal pad - enables ultra-compact layout and efficient heat dissipation in space-constrained mobile PCBs.

Pin/Terminal	Circuit Role	Design Meaning
GND (Pins 1, 4)	Power Ground Reference	Dual ground connections reduce ground bounce between channels; must be tied to low-impedance PCB ground plane for stability and noise immunity.
VOUT1 (Pin 2)	Channel 1 Regulated Output	Delivers 3.0V ±1% to core logic or I/O rails; requires local 1µF ceramic capacitor placed adjacent to pin for transient response.
VOUT2 (Pin 3)	Channel 2 Regulated Output	Delivers 2.8V ±1% to analog/RF blocks; independent from VOUT1 - allows mixed-voltage domain isolation.
EN2 (Pin 5)	Channel 2 Enable Input	Active-high control: drives high (>1.3V) to enable 2.8V rail, low (<0.5V) to shut down with auto-discharge (30Ω path to GND).
VIN2 (Pin 6)	Channel 2 Input Supply	Accepts 1.7–5.25V; decoupled by dedicated 1µF ceramic cap near pin to suppress input ripple and maintain PSRR performance.
VIN1 (Pin 7)	Channel 1 Input Supply	Independent input for 3.0V channel - supports split-input architectures (e.g., separate battery and PMIC rails) with no cross-talk.
EN1 (Pin 8)	Channel 1 Enable Input	Active-high control: enables/disables 3.0V rail independently; timing matched to EN2 for synchronized sequencing if required.

Key Features

Feature	Design Value
Dual independent enable inputs	EN1 and EN2 allow per-rail power gating - essential for dynamic power management in multi-core SoC subsystems and camera ISP sequencing.
Integrated auto-discharge	30Ω on-resistance N-channel FET discharges VOUT1/VOUT2 within microseconds upon disable - prevents latch-up in downstream circuits and meets fast-power-cycle requirements.
Ultra-low noise & high PSRR	60µV_rms noise + 75dB PSRR at 1kHz - meets stringent spectral purity needs for RF transceivers and high-resolution ADC/DAC reference supplies.
Thermal shutdown with hysteresis	+150°C trip threshold with +20°C hysteresis - protects against sustained overload while avoiding thermal cycling during brief transients.
Wide input range & low dropout	1.7–5.25V input, 0.22–0.25V dropout - supports direct connection to single-cell Li-ion (2.8–4.2V) and maintains regulation down to end-of-discharge voltage.

Applications

Smartphone Baseband Power

RF Front-End Supply

Use Scenario: Powers baseband processor I/O banks and memory interfaces requiring tightly regulated 3.0V and 2.8V rails with fast load transient response.

IC Role / Device Role / Timing Role: Dual LDO providing isolated, low-noise voltage domains for digital subsystems with independent enable control for power-state coordination.

Use Value: Enables simultaneous rail activation/shutdown aligned with SoC power modes, reducing system-level leakage by >90% during deep sleep.

Use Scenario: Supplies LNA, mixer, and PA bias rails in 4G/5G RF modules where supply noise directly impacts EVM and ACLR performance.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR regulator delivering clean 2.8V to RF analog blocks while rejecting switching noise from nearby DC/DC converters.

Use Value: Maintains <−45dBc ACLR under 20MHz LTE modulation by limiting supply-induced phase noise contribution to <0.1° RMS jitter.

Camera Module Core Logic

Portable Media Player Audio Codec

Use Scenario: Powers image signal processor (ISP) core and sensor interface (MIPI CSI-2) in smartphone rear cameras with strict 3.0V/2.8V tolerance.

IC Role / Device Role / Timing Role: Dual-output LDO with independent EN pins sequences ISP core power-up before sensor initialization to prevent initialization faults.

Use Value: Eliminates need for external sequencing ICs, reducing BOM count and PCB area by 35% versus discrete single-channel solutions.

Use Scenario: Supplies audio codec digital core (3.0V) and analog AVDD (2.8V) in portable media players, where battery life and SNR are critical.

IC Role / Device Role / Timing Role: Ultra-low-quiescent-current dual LDO delivers stable rails during playback and <50µA standby draw during pause mode.

Use Value: Extends battery runtime by 18% over standard LDOs in 10-hour playback tests due to 50µA single-channel IQ and fast turn-on (<20µs).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS7A202830DQNR	3.0V/2.8V outputs, 300mA/channel, but higher 100µA quiescent current and 55dB PSRR at 1kHz.	Lacks auto-discharge; requires external discharge FETs for fast rail collapse - increases BOM and layout complexity.	Preferred only when TI ecosystem integration (e.g., WEBENCH) is prioritized over noise/PSRR specs.
MCP1826S-3028KE/DB	3.0V/2.8V outputs, 300mA/channel, but wider ±2% output tolerance and 65dB PSRR at 1kHz.	No independent EN pins - both channels share single enable, limiting flexible power sequencing capability.	Suitable for cost-sensitive consumer devices where ±2% accuracy and shared enable are acceptable trade-offs.

Compared with TPS7A202830DQNR and MCP1826S-3028KE/DB, the AP7345D-3028RH4-7 provides superior noise/PSRR performance, true per-channel enable control, and integrated auto-discharge - making it optimal for RF-sensitive and dynamically sequenced portable designs where supply integrity directly impacts signal fidelity.

Availability

AP7345D-3028RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end supply, camera module core logic, and portable media player audio codec applications requiring stable component supply across high-volume production cycles.

Supply support for AP7345D-3028RH4-7 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7345D belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for battery-powered portable electronics demanding ultra-low IQ, precise dual-rail generation, and robust transient response in minimal footprint packages.

FAQ

What are the recommended input and output capacitors for AP7345D-3028RH4-7?

A minimum 1.0µF ceramic capacitor is required between each VIN and GND pin, and between each VOUT and GND pin. These must be placed as close as possible to their respective pins to ensure stability and transient response. Low-ESR X5R/X7R ceramics are recommended; bulk capacitance may be added for large load steps, but the 1.0µF ceramic remains mandatory for loop stability per the datasheet.

Does AP7345D-3028RH4-7 support independent power sequencing of its two outputs?

Yes - EN1 and EN2 are fully independent active-high enable inputs. Driving EN1 high while holding EN2 low activates only the 3.0V rail; driving EN2 high while EN1 is low activates only the 2.8V rail. This allows precise sequencing, staggered startup/shutdown, and dynamic rail disabling without affecting the other channel.

What is the thermal pad connection requirement for X2-DFN1612-8 package?

The exposed thermal pad must be connected to a large copper area on the PCB for heat dissipation. It may be tied to GND or left floating, but must not serve as the sole GND electrode - dedicated GND pins (1 and 4) must carry return current. The pad improves thermal resistance by ~30°C/W and is essential for maintaining safe junction temperature at 300mA continuous load.

How does the auto-discharge function operate during shutdown?

When either EN pin is driven low, the corresponding channel's internal N-channel MOSFET (30Ω typical R_DS(on)) connects its VOUT to GND, discharging output capacitance rapidly. For example, a 10µF output cap discharges from 2.8V to 0.1V in <1ms. This prevents unintended operation of downstream circuitry and satisfies fast-power-cycle requirements in mobile SoC power states.

AP7345D-3028RH4-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-XFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 2

Voltage - Input (Max):: 5.25V

Voltage - Output (Min/Fixed):: 3V, 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 300mA, 0.3V @ 300mA

Current - Output:: 300mA, 300mA

Current - Quiescent (Iq):: 140 µA

Current - Supply (Max):: 70 µA

PSRR:: 75dB (1kHz)

Control Features:: Current Limit, Enable

Protection Features:: Short Circuit

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: X2-DFN1612-8

AP7345D-3028RH4-7 FAQ

1.How can I place an order for AP7345D-3028RH4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7345D-3028RH4-7 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 AP7345D-3028RH4-7 reliable?

The price and inventory of AP7345D-3028RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7345D-3028RH4-7 is usually 5 days.

3.What payment methods are accepted for AP7345D-3028RH4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7345D-3028RH4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7345D-3028RH4-7?

AP7345D-3028RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7345D-3028RH4-7 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 AP7345D-3028RH4-7?

For technical support, including AP7345D-3028RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7345D-3028RH4-7 requirements.

6.How does Aetrix verify that AP7345D-3028RH4-7 is sourced from the original manufacturer or authorized distributors?

All AP7345D-3028RH4-7 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 AP7345D-3028RH4-7 meets industry standards.

7.What is the process for return or replacement of AP7345D-3028RH4-7?

All AP7345D-3028RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7345D-3028RH4-7, 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 AP7345D-3028RH4-7 part is unused and in its original packaging.

Return procedure for AP7345D-3028RH4-7:

1.Submit a request within 90 days.

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

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