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

Diodes Incorporated AP7340-285FS4-7

Name: AP7340-285FS4-7
Brand: Diodes Incorporated
SKU: AP7340-285FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7340-285FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340-285FS4-7.pdf

Description:: IC REG LINEAR 2.85V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7340-285FS4-7 from Diodes Incorporated is a 2.85V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). Built on a CMOS process, it features enable control, low 35µA quiescent current, and operates from 1.7V to 5.25V input-optimized for RF supply rails in portable wireless communication devices.

For engineers reviewing the AP7340-285FS4-7 datasheet, AP7340-285FS4-7 pinout, AP7340-285FS4-7 application, or AP7340-285FS4-7 equivalent, key selection criteria include dropout voltage at 150mA (0.21–0.27V), EN logic thresholds (0.5V_IL/1.3V_IH), thermal performance in X2-DFN1010-4, and stability with 0.47µF ceramic capacitors.

Technical Context

The AP7340-285FS4-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor in a non-discharge configuration. Its feedback network is internal, delivering fixed 2.85V output without external resistors.

Enable functionality uses TTL-compatible logic levels: EN < 0.5V disables the regulator (I_STANDBY ≤ 1.0µA), while EN > 1.3V enables regulation. Short-circuit protection limits output current to ~55mA when V_OUT shorts to GND.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.85V ±1% at 25°C; ±1.5% over –40°C to +85°C - ensures stable bias for RF power amplifiers and analog sensor interfaces.
Max Output Current	150mA continuous - supports moderate-power RF ICs and camera modules without thermal derating in compact layouts.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise degradation in VCO and PLL supply applications.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby modes of portable media players.
Dropout Voltage	0.21–0.27V at 150mA (for V_OUT = 2.8–3.3V) - enables operation from single-cell Li-ion (3.0V min) down to 2.85V under load.
Input Voltage Range	1.7V to 5.25V - compatible with wide-input PMIC outputs and multi-cell battery systems with minimal headroom.

Pinout & Package

AP7340-285FS4-7 is housed in a 1.0mm × 1.0mm, 0.4mm height X2-DFN1010-4 package with exposed thermal pad. The ultra-compact footprint supports high-density PCB designs in space-constrained mobile and wearable applications.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 1)	Regulated power output	Delivers clean 2.85V to load; requires 0.47µF ceramic capacitor placed adjacent to minimize ESR-induced instability.
GND (Pin 2)	Power ground reference	Primary return path; must connect to low-impedance ground plane and share thermal pad connection for optimal thermal dissipation.
EN (Pin 3)	Enable control input	TTL-compatible digital input: high (>1.3V) enables regulation; low (<0.5V) disables output and reduces I_Q to ≤1µA.
VIN (Pin 4)	Unregulated input supply	Accepts 1.7–5.25V; requires 0.47µF decoupling capacitor near pin to suppress supply transients and maintain stability.

Key Features

Feature	Design Value
High PSRR at 1kHz	75dB - maintains RF signal integrity by rejecting ripple from noisy switchers in shared power domains.
Ultra-low output noise	60µV_rms (10Hz–100kHz) - preserves SNR in analog front-ends and clock distribution networks.
Low quiescent current	35µA typical - enables multi-week battery life in always-on IoT sensors with periodic wake-up cycles.
Thermally enhanced DFN	X2-DFN1010-4 with exposed pad - achieves 210°C/W θ_JA on 2-layer JEDEC board, supporting 150mA continuous in 25°C ambient.
Integrated short-circuit protection	~55mA fold-back current limit - prevents thermal runaway during accidental V_OUT-to-GND faults without external components.

Applications

RF Power Amplifier Supply

Camera Module Bias Rail

Use Scenario: Powers the collector/drain bias rail of 2.4GHz/5GHz Wi-Fi or Bluetooth PA stages in smartphones and tablets.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO providing stable V_CC to minimize AM-to-PM distortion and phase noise.

Use Value: 60µV_rms noise and 75dB PSRR prevent spectral regrowth and adjacent-channel leakage in transmit paths.

Use Scenario: Supplies image sensor analog core and ISP analog front-end in compact camera modules.

IC Role / Device Role / Timing Role: Fixed 2.85V bias source ensuring consistent pixel response and ADC reference stability.

Use Value: ±1% output accuracy and low load regulation (≤1.0%/A) maintain consistent exposure and color fidelity across varying frame rates.

Wireless Adapter Core Logic

Portable Media Player Audio Codec

Use Scenario: Powers baseband processor I/O and PHY interface circuits in USB/PCIe wireless adapters.

IC Role / Device Role / Timing Role: Enable-controlled LDO delivering clean 2.85V to digital logic blocks during active data transfer.

Use Value: 35µA quiescent current and fast enable/disable transition (<10µs) reduce average power in burst-mode operation.

Use Scenario: Supplies DAC, headphone amplifier, and audio codec analog sections in MP3/MP4 players.

IC Role / Device Role / Timing Role: Low-noise voltage source for sensitive audio signal chains requiring minimal THD+N degradation.

Use Value: 60µV_rms noise floor avoids audible hiss; 0.21–0.27V dropout enables use with aging Li-ion cells down to 2.85V.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2852E/TT	250mA rated, 6µA I_Q, but only 60dB PSRR at 1kHz and 30µV_rms noise - lower noise but significantly reduced ripple rejection.	Better for ultra-low-power always-on sensors; less suitable for RF supply where PSRR dominates.	Select if standby current is critical and RF noise coupling is absent.
Torex XC6210B285MR-G	150mA rated, 25µA I_Q, 70dB PSRR at 1kHz, 40µV_rms noise - slightly lower PSRR and noise than AP7340-285FS4-7.	Valid for general-purpose analog rails; marginal for demanding RF bias where 75dB PSRR is specified.	Choose when cost sensitivity outweighs 5dB PSRR margin and 20µV noise advantage.

Compared with MCP1700T-2852E/TT and XC6210B285MR-G, AP7340-285FS4-7 delivers the highest PSRR (75dB) and balanced low-noise/low-I_Q performance-making it optimal for RF and high-fidelity analog supply roles where both ripple suppression and spectral purity are design-critical.

Availability

AP7340-285FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier supply, camera module bias rail, and portable media player audio codec applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7340-285FS4-7 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 for power management, signal integrity, and connectivity applications.

The AP7340 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive analog and RF subsystems in portable wireless and imaging equipment.

FAQ

What is the minimum input voltage required for AP7340-285FS4-7 to regulate at full 150mA load?

The minimum input voltage is determined by dropout: at 150mA, dropout is 0.21–0.27V for 2.8–3.3V outputs. For 2.85V output, VIN must be ≥ 3.06V to sustain regulation. Below this, output voltage drops linearly with input.

Can AP7340-285FS4-7 be used with ceramic output capacitors smaller than 0.47µF?

No-Diodes specifies 0.47µF minimum for stability. Lower values risk oscillation due to insufficient phase margin; the device's compensation is optimized for ≥0.47µF ceramic capacitors with ESR < 10mΩ.

Is the thermal pad of the X2-DFN1010-4 package electrically connected internally?

No-the thermal pad is not internally connected to any die node. It must be externally connected to GND or left floating per layout guidelines; connecting to GND improves thermal performance but is not electrically required for function.

Does AP7340-285FS4-7 include reverse-current protection?

No-AP7340-285FS4-7 is a non-discharge variant (no internal NMOS discharge FET). When disabled, VOUT remains floating and may retain charge via external loads or capacitance; external diode or circuitry is needed for reverse-current blocking.

AP7340-285FS4-7 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):: 5.25V

Voltage - Output (Min/Fixed):: 2.85V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.27V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: 100 µA

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-DFN1010-4

AP7340-285FS4-7 FAQ

1.How can I place an order for AP7340-285FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340-285FS4-7 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 AP7340-285FS4-7 reliable?

The price and inventory of AP7340-285FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340-285FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340-285FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340-285FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340-285FS4-7?

AP7340-285FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340-285FS4-7 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 AP7340-285FS4-7?

For technical support, including AP7340-285FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340-285FS4-7 requirements.

6.How does Aetrix verify that AP7340-285FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340-285FS4-7 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 AP7340-285FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340-285FS4-7?

All AP7340-285FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340-285FS4-7, 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 AP7340-285FS4-7 part is unused and in its original packaging.

Return procedure for AP7340-285FS4-7:

1.Submit a request within 90 days.

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

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