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

Diodes Incorporated AP7115-35SEG-7

Name: AP7115-35SEG-7
Brand: Diodes Incorporated
SKU: AP7115-35SEG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7115-35SEG-7

Manufacturer:: Diodes Incorporated

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

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: AP7115-35SEG-7.pdf

Description:: IC REG LINEAR 3.5V 150MA SOT353

Quantity:: RFQ Add To RFQ list

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Inventory:3,224

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Product details

Overview

AP7115-35SEG-7 from Diodes Incorporated is a 150mA fixed-output (3.5V) low dropout linear regulator in SOT353 package, featuring 200mV dropout at full load, 50µA quiescent current, ±2% output voltage accuracy, and integrated thermal shutdown and current-limit protection. It serves as a power management IC for battery-powered portable electronics requiring stable, low-noise 3.5V supply.

For engineers reviewing the AP7115-35SEG-7 datasheet, AP7115-35SEG-7 pinout, AP7115-35SEG-7 application, or AP7115-35SEG-7 equivalent, key selection criteria include dropout performance at 150mA, EN-controlled enable functionality, BP bypass capacitor support for noise reduction, and SOT353 thermal resistance (θJA = 337°C/W) in space-constrained designs.

Technical Context

The AP7115-35SEG-7 uses a PMOS pass element with bandgap reference and error amplifier feedback to regulate output voltage. Its enable (EN) pin provides active-high logic control, while the BP pin accepts a 0.1µF ceramic bypass capacitor to suppress bandgap reference noise.

Protection circuitry includes foldback current limiting (200–250mA typ.), short-circuit survival capability, and thermal shutdown activation at +150°C with 30°C hysteresis. Input voltage range (2.5V–5.5V) and low temperature drift (50–100 ppm/°C) support operation across industrial ambient conditions (-40°C to +85°C).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.5V ±2% - ensures stable rail for 3.3V-tolerant I/O or 3.5V-specific sensors without external feedback.
Dropout Voltage	200mV max at 150mA - enables regulation from 3.7V Li-ion cells down to end-of-discharge (~3.5V), extending battery runtime.
Quiescent Current	50µA typ. - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up controllers.
PSRR	70dB at 1kHz - suppresses switching noise from upstream DC-DC converters, critical for RF or audio analog sections.
Thermal Shutdown	Activates at +150°C, resets at +120°C - prevents permanent damage during sustained overload or poor PCB heatsinking.
EN Pin Threshold	V_IL ≤ 0.7V, V_IH ≥ 2.0V - compatible with 1.8V/3.3V GPIO without level-shifting in host microcontrollers.
Bandgap Bypass	0.1µF capacitor on BP pin reduces output voltage noise - directly lowers RMS noise to ≤50µV_rms (10Hz–100kHz).

Pinout & Package

SOT353 (5-pin, 2.15mm × 2.10mm × 0.90mm) surface-mount package with exposed pad not electrically connected; θ_JA = 337°C/W on standard FR-4 board.

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Input voltage supply	Accepts 2.5V–5.5V; requires 1µF ceramic input capacitor placed adjacent to pin for stability.
2 GND	Power ground reference	Low-impedance return path for input/output currents; must connect to solid ground plane under device.
3 EN	Enable control input	Active-high logic: drives regulator ON when ≥2.0V; pulls to GND for <0.7V shutdown state (I_SHDN ≤ 1µA).
4 BP	Bandgap reference bypass	Connects 0.1µF ceramic capacitor to GND to reduce reference noise and improve output voltage stability.
5 OUT	Regulated output voltage	Delivers up to 150mA at 3.5V; requires ≥1µF ceramic output capacitor with ESR <1Ω for loop stability.

Key Features

Feature	Design Value
Ultra-low quiescent current	50µA typical - extends battery life in IoT endpoints where sleep current dominates energy budget.
Fast transient response	Stabilizes within 10µs after 50mA load step - maintains voltage integrity for burst-mode processors or ADC sampling events.
Integrated protection suite	Current limit + thermal shutdown + short-circuit survival - eliminates need for external fault-handling circuitry.
Green packaging	SOT353 with halogen/antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) - meets RoHS 2 and environmental compliance mandates.
High PSRR at low frequency	70dB @ 1kHz - rejects ripple from buck converter switching frequencies, enabling clean analog supply rails.

Applications

Wireless Communication Modules

GSM/GPRS Handsets

Use Scenario: Powering baseband processor I/O banks and SIM card interface in compact cellular modules.

IC Role / Device Role / Timing Role: Primary 3.5V LDO supplying regulated voltage to digital logic with tight noise and transient requirements.

Use Value: 50µA quiescent current minimizes standby drain; 200mV dropout enables direct use of single-cell Li-ion without pre-regulation.

Use Scenario: Supplying display driver ICs and audio codec analog sections in dual-SIM mobile phones.

IC Role / Device Role / Timing Role: Secondary LDO delivering clean 3.5V rail isolated from noisy PMIC outputs.

Use Value: 70dB PSRR attenuates switching noise from main PMIC, preventing audible artifacts in earpiece output.

Battery-Powered Medical Sensors

PC Peripheral Cards (LAN/CD-ROM)

Use Scenario: Providing stable bias to low-power biosignal amplifiers and ADC front-ends in wearable ECG patches.

IC Role / Device Role / Timing Role: Precision analog supply LDO with low noise and minimal thermal drift.

Use Value: 50–100 ppm/°C output tempco and ≤50µV_rms noise ensure measurement repeatability across body-temperature ranges.

Use Scenario: Regulating 3.5V for USB PHY transceivers and optical pickup drivers on notebook expansion cards.

IC Role / Device Role / Timing Role: Compact-area LDO supporting hot-plug insertion with fast startup and enable control.

Use Value: EN pin allows host BIOS to sequence power delivery; SOT353 footprint saves space on dense mini-PCIe layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7315-35SG-7	Successor part with improved 30µA IQ, lower 150mV dropout, and enhanced PSRR (75dB); same SOT353 footprint.	Designed for new designs requiring longer battery life and tighter regulation; pin-compatible but not drop-in due to revised BP pin behavior.	Select AP7315-35SG-7 for new designs; AP7115-35SEG-7 remains valid for legacy BOM continuity and cost-sensitive replacements.
MCP1700T-3502E/TT	Microchip 250mA LDO with 1.6µA IQ, 178mV dropout, but no BP pin or EN control; SOT23-5 package differs mechanically.	Lacks enable/shutdown and bandgap bypass - unsuitable where dynamic power gating or ultra-low noise is required.	Choose only if system requires sub-µA sleep current and can accept fixed-enable operation and different layout constraints.

Compared with AP7315-35SG-7, the AP7115-35SEG-7 trades higher quiescent current and dropout for proven field reliability and broader design documentation; versus MCP1700T-3502E/TT, it offers superior noise suppression and programmable enable but consumes more standby power.

Availability

AP7115-35SEG-7 is available at Aetrix Electronics and suitable for wireless communication modules, GSM/GPRS handsets, and battery-powered medical sensors requiring stable component supply with long-term lifecycle visibility.

Supply support for AP7115-35SEG-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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP7115 belongs to Diodes' low-quiescent-current LDO family designed specifically for space-constrained, battery-operated portable electronics needing robust thermal and overcurrent protection without external components.

FAQ

What is the maximum continuous output current of AP7115-35SEG-7?

The AP7115-35SEG-7 guarantees 150mA output current under all operating conditions (VIN = 2.5V–5.5V, TA = –40°C to +85°C). Current limit activates at 200–250mA (typ.) to protect the device during overload or short-circuit events, allowing indefinite short-to-ground survival without damage.

Can the EN pin be left unconnected or tied to VIN?

No - the EN pin must not be left floating. If shutdown functionality is unused, tie EN directly to VIN (not through a resistor) to ensure reliable turn-on. Floating EN may cause erratic enable/disable behavior due to leakage-induced threshold crossing, risking unintended power cycling.

Is a BP capacitor mandatory for stable operation?

A 0.1µF ceramic capacitor between BP and GND is not mandatory for basic regulation but is required to achieve the specified 50µV_rms output noise and optimal PSRR. Omitting it increases output voltage noise and may degrade transient response in noise-sensitive analog circuits.

What thermal derating applies when using AP7115-35SEG-7 in SOT353 package?

In SOT353, θ_JA = 337°C/W on standard FR-4. At 25°C ambient and 150mA load with 3.7V input, power dissipation is ~60mW; junction temperature rise is ~20°C - well below the 125°C max. For continuous 150mA at 5.5V input, derate ambient to ≤60°C or enhance PCB copper area to avoid thermal shutdown.

AP7115-35SEG-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

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):: 3.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 80 µA

Current - Supply (Max):: -

PSRR:: 70dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-353

AP7115-35SEG-7 FAQ

1.How can I place an order for AP7115-35SEG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7115-35SEG-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 AP7115-35SEG-7 reliable?

The price and inventory of AP7115-35SEG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7115-35SEG-7 is usually 5 days.

3.What payment methods are accepted for AP7115-35SEG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7115-35SEG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7115-35SEG-7?

AP7115-35SEG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7115-35SEG-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 AP7115-35SEG-7?

For technical support, including AP7115-35SEG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7115-35SEG-7 requirements.

6.How does Aetrix verify that AP7115-35SEG-7 is sourced from the original manufacturer or authorized distributors?

All AP7115-35SEG-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 AP7115-35SEG-7 meets industry standards.

7.What is the process for return or replacement of AP7115-35SEG-7?

All AP7115-35SEG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7115-35SEG-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 AP7115-35SEG-7 part is unused and in its original packaging.

Return procedure for AP7115-35SEG-7:

1.Submit a request within 90 days.

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

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