Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated AP7340-15FS4-7

Name: AP7340-15FS4-7
Brand: Diodes Incorporated
SKU: AP7340-15FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP7340-15FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340-15FS4-7.pdf

Description:: IC REG LINEAR 1.5V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:9,103

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AP7340-15FS4-7 from Diodes Incorporated is a 1.5V fixed-output, 150mA low-dropout linear regulator in X2-DFN1010-4 package, featuring ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It delivers stable power to RF supply rails and camera sensor cores in space-constrained portable electronics.

For engineers reviewing the AP7340-15FS4-7 datasheet, AP7340-15FS4-7 pinout, AP7340-15FS4-7 application, or AP7340-15FS4-7 equivalent, key selection criteria include dropout voltage (0.38V max at 150mA for 1.5V output), enable threshold compatibility (EN high ≥1.3V), thermal performance under 150mA load, and ceramic capacitor stability with 0.47µF C_IN/C_OUT.

Technical Context

The AP7340-15FS4-7 employs a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its fixed 1.5V output is set by an internal resistor network, eliminating external feedback components.

Enable control is implemented via a dedicated EN pin with defined logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.3V) and sub-1µA leakage. Short-circuit protection limits output current to ~55mA during V_OUT-to-GND fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±1% at +25°C; ±1.5% over -40°C to +85°C - ensures stable bias for 1.5V I/O domains
Max Output Current	150mA continuous - supports moderate-power RF transceivers and image sensors
Dropout Voltage	0.38V (typ) at 150mA - enables operation from 1.88V input, compatible with single-cell Li-ion or boosted 1.8V rails
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails
Output Noise	60µV_rms (10Hz–100kHz) - preserves signal integrity in analog front-ends and PLL power domains
Quiescent Current	35µA (typ) - minimizes battery drain in always-on standby circuits
Input Voltage Range	1.7V to 5.25V - accommodates single-cell Li-ion (2.7–4.2V), 3.3V, and 5V system rails

Pinout & Package

The AP7340-15FS4-7 is housed in a 1.0mm × 1.0mm, 0.4mm height X2-DFN1010-4 package with exposed thermal pad. PCB layout requires direct connection of the thermal pad to GND plane for optimal thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 1)	Regulated power output	Delivers clean 1.5V to load; must be decoupled with 0.47µF ceramic capacitor placed adjacent to pin
GND (Pin 2)	Reference and return path	Primary ground reference for regulation loop; connects to thermal pad and system GND plane
EN (Pin 3)	Logic-controlled enable input	Drives regulator ON (≥1.3V) or OFF (≤0.5V); must not float - tie to VIN if always-on operation required
VIN (Pin 4)	Unregulated input supply	Accepts 1.7–5.25V input; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin

Key Features

Feature	Design Value
High PSRR	75dB at 1kHz - maintains output stability when powered from noisy switcher outputs
Low-noise regulation	60µV_rms output noise - avoids degradation of SNR in RF receiver LNA and ADC reference supplies
Precision output accuracy	±1% at +25°C - eliminates need for post-regulation trimming in 1.5V core logic applications
Ultra-low quiescent current	35µA typical - extends battery life in always-on sensor nodes and wake-on-event subsystems
Thermally optimized package	X2-DFN1010-4 with exposed thermal pad - achieves <160°C/W θ_JA on 2oz copper, enabling 150mA operation without derating

Applications

RF Power Amplifier Bias

CMOS Image Sensor Core Supply

Use Scenario: Providing clean, low-noise bias to GaAs pHEMT or SiGe HBT RF power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise LDO delivering stable 1.5V to PA drain bias node, rejecting switching noise from PMIC DC-DC converters.

Use Value: 75dB PSRR prevents AM-to-PM distortion; 60µV_rms noise avoids EVM degradation in QAM-modulated signals.

Use Scenario: Powering the analog core and pixel array of 1/2.8" rolling-shutter CMOS image sensors in smartphone cameras.

IC Role / Device Role / Timing Role: Fixed 1.5V LDO supplying sensor analog front-end, isolated from digital switching noise on shared 1.8V rail.

Use Value: ±1% accuracy ensures consistent pixel response; low dropout allows operation from partially discharged battery.

Wireless Adapter Baseband IC

Portable Media Player Audio Codec

Use Scenario: Regulating 1.5V supply for baseband processors and transceiver PHYs in Wi-Fi 6/Bluetooth 5.3 USB dongles.

IC Role / Device Role / Timing Role: Enable-controlled LDO powering SoC I/O and memory interface blocks during active transmit/receive bursts.

Use Value: 35µA quiescent current minimizes idle power; fast load transient response (<10µs) maintains voltage during burst-mode operation.

Use Scenario: Delivering ultra-low-noise 1.5V to stereo audio DACs and headphone amplifiers in flash-based MP4 players.

IC Role / Device Role / Timing Role: Low-noise LDO decoupling DAC reference and analog output stages from noisy digital subsystems.

Use Value: 60µV_rms noise directly translates to >105dB THD+N; thermal pad enables sustained playback without thermal shutdown.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, enable-controlled LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-1502E/TO	Same 1.5V output, but 250mA rated; higher 6µA quiescent current; TO-92 package (larger footprint, lower thermal performance)	Lacks enable pin; unsuitable for dynamic power gating in portable devices	Select only if board space permits TO-92 and enable control is unnecessary
Torex XC6219B152MR-G	1.5V output, 150mA, 35µA IQ, but 55dB PSRR at 1kHz and 120µV_rms noise - significantly higher noise and lower ripple rejection	Compatible pinout but inferior noise/PSRR performance limits use in RF-sensitive designs	Acceptable only for non-RF digital core supplies where noise sensitivity is low

Compared with MCP1700-1502E/TO and XC6219B152MR-G, the AP7340-15FS4-7 uniquely combines 1.5V precision, 75dB PSRR, 60µV_rms noise, and enable control in a 1.0mm² DFN - making it optimal for RF and imaging subsystems where noise, size, and dynamic power management are critical.

Availability

AP7340-15FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, and wireless adapter baseband IC applications requiring stable component supply, guaranteed 150mA output, and long-term lifecycle continuity.

Supply support for AP7340-15FS4-7 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 portable electronics including smartphones, tablets, and wireless communication modules.

FAQ

What is the minimum input voltage required for AP7340-15FS4-7 to maintain regulation at full 150mA load?

The minimum input voltage is calculated as V_OUT + V_DROP = 1.5V + 0.47V = 1.97V, based on the maximum dropout voltage of 0.47V specified for 1.5V output at 150mA and -40°C to +85°C. Operation below this voltage results in unregulated output.

Can AP7340-15FS4-7 be used without an external enable signal?

Yes - the EN pin can be permanently tied to VIN to ensure continuous operation. This configuration disables dynamic power gating but maintains all other regulation features, including PSRR, noise performance, and thermal protection.

Is a separate output capacitor required, and what value is recommended?

Yes, a 0.47µF ceramic capacitor is mandatory and must be placed within 2mm of the VOUT and GND pins. This value ensures stability across temperature and load, supports fast transient response for burst-mode loads, and meets the ESR requirements specified in the datasheet.

Does AP7340-15FS4-7 include reverse-current protection or output discharge functionality?

No - the AP7340-15FS4-7 is the non-discharge variant (standard AP7340, not AP7340D). It lacks an internal discharge FET; therefore, VOUT remains floating after shutdown, and external circuitry is required to actively discharge output capacitance if needed.

AP7340-15FS4-7 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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.47V @ 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

AP7340-15FS4-7 FAQ

1.How can I place an order for AP7340-15FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340-15FS4-7 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 AP7340-15FS4-7 reliable?

The price and inventory of AP7340-15FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340-15FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340-15FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340-15FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340-15FS4-7?

AP7340-15FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340-15FS4-7 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 AP7340-15FS4-7?

For technical support, including AP7340-15FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340-15FS4-7 requirements.

6.How does Aetrix verify that AP7340-15FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340-15FS4-7 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 AP7340-15FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340-15FS4-7?

All AP7340-15FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340-15FS4-7, 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 AP7340-15FS4-7 part is unused and in its original packaging.

Return procedure for AP7340-15FS4-7:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…