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

Diodes Incorporated AP7315-11SR-7

Name: AP7315-11SR-7
Brand: Diodes Incorporated
SKU: AP7315-11SR-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-11SR-7

Manufacturer:: Diodes Incorporated

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

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AP7315-11SR-7.pdf

Description:: IC REG LINEAR 1.1V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,436

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Product details

Overview

AP7315-11SR-7 from Diodes Incorporated is a 150mA low-dropout linear regulator with fixed 1.1V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in space-constrained portable devices using the SOT23-3 package.

For engineers reviewing the AP7315-11SR-7 datasheet, AP7315-11SR-7 pinout, AP7315-11SR-7 application, or AP7315-11SR-7 equivalent, this page delivers verified electrical specs, thermal layout guidance, enable control thresholds, dropout behavior across temperature, and real-world stability conditions with 0.47µF ceramic capacitors.

Technical Context

The AP7315-11SR-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active-high enable input - enabling fast turn-on/turn-off control without external components. Its architecture supports stable operation with minimal 0.47µF input/output ceramic capacitors and exhibits low sensitivity to ESR variation.

It delivers regulated 1.1V output from 1.7V–5.25V input, maintains ±1% accuracy over -40°C to +85°C, achieves 0.50V typical dropout at 150mA (for V_OUT = 1.1V), and provides 0.01µA shutdown current when EN is pulled low - critical for battery-powered RF subsystems requiring tight voltage tolerance and ultra-low standby power.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.1V ±1% at +25°C; ensures stable core bias for low-voltage RF ICs without external feedback network.
Max Output Current	150mA guaranteed; sufficient for powering single-band RF transceivers or sensor signal chains in handheld devices.
PSRR	75dB at 1kHz; suppresses switching noise from adjacent DC-DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz); preserves SNR in sensitive analog front-ends like LNA or ADC reference supplies.
Quiescent Current	35µA typical at 1mA load; extends battery life in always-on wireless modules during idle periods.
Dropout Voltage	0.50V typical at 150mA (1.1V output); enables operation from single-cell Li-ion (3.0V min) or coin-cell (3.0V) sources with margin.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V; compatible with 1.8V/3.3V GPIOs for precise power sequencing control.

Pinout & Package

AP7315-11SR-7 uses the SOT23-3 (SR) package: 1.45mm × 1.3mm footprint, 0.95mm height, 3-pin configuration with no exposed thermal pad. PCB layout requires short, wide traces to VIN/VOUT/GND and placement of 0.47µF ceramic capacitors within 2mm of respective pins.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Input power supply connection	Accepts 1.7V–5.25V; must be decoupled with 0.47µF ceramic capacitor placed adjacent to pin to suppress high-frequency ripple.
GND (Pin 1)	Power ground reference	Low-impedance return path for input/output currents; connects directly to PCB ground plane to minimize noise coupling.
VOUT (Pin 2)	Regulated output voltage	Delivers stable 1.1V ±1%; requires 0.47µF ceramic capacitor near pin to ensure transient response and loop stability.

Key Features

Feature	Design Value
Ultra-low quiescent current	35µA typical at light load - reduces standby power loss in battery-operated IoT sensors and wearables.
High PSRR at audio frequencies	75dB @ 1kHz - effectively isolates RF circuits from digital switching noise on shared power rails.
Low-noise output	60µV_rms broadband noise - avoids degradation of RF receiver sensitivity or ADC effective resolution.
Fast enable response	Turn-on time < 50µs - supports dynamic power gating in multi-mode wireless transceivers.
Thermal shutdown protection	Integrated foldback current limit (55mA short-circuit) - prevents damage during output overload or PCB trace faults.

Applications

RF Power Amplifier Bias

Low-Voltage Microcontroller Core Supply

Use Scenario: Providing clean 1.1V bias to GaAs or SiGe RF power amplifiers in Bluetooth/Wi-Fi modules where supply ripple directly impacts EVM and ACLR.

IC Role / Device Role / Timing Role: Primary LDO delivering regulated core voltage; replaces bulkier solutions requiring external compensation.

Use Value: 75dB PSRR suppresses 1MHz–10MHz switching artifacts from PMICs, maintaining >35dB ACLR in 2.4GHz transmission.

Use Scenario: Powering 1.1V I/O or core domains of ultra-low-power microcontrollers (e.g., ARM Cortex-M0+) in medical patch monitors.

IC Role / Device Role / Timing Role: System-level voltage translator enabling compatibility between 1.8V peripherals and sub-1.2V logic cores.

Use Value: 35µA quiescent current extends 10-year battery life in continuous-sensing applications with periodic wake-up cycles.

Camera Sensor Analog Front-End

Wireless Audio Codec Reference Supply

Use Scenario: Supplying 1.1V to CIS analog signal chain (ADC reference, PGA, PLL VCO) in compact smartphone camera modules.

IC Role / Device Role / Timing Role: Low-noise local regulator decoupling sensor analog section from noisy SoC power domains.

Use Value: 60µV_rms noise floor ensures < 12-bit ENOB in 12-bit image sensor ADCs under full-frame readout.

Use Scenario: Generating ultra-clean 1.1V reference for stereo audio DACs in true wireless earbuds with ANC processing.

IC Role / Device Role / Timing Role: Dedicated LDO for DAC internal reference, isolated from digital switching noise of DSP and Bluetooth radio.

Use Value: ±1% output accuracy maintains THD+N < -95dB across temperature, preserving audio fidelity during battery discharge.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1102E/TT	100mA max output, 6µA quiescent current, 65dB PSRR @ 1kHz, SOT23-3 package	Limited to lower-current analog sensors; insufficient for RF PA bias at 150mA	Select when ultra-low IQ dominates over output current and PSRR requirements.
Torex XC6206P112MR-G	150mA output, ±2% accuracy, 50dB PSRR @ 1kHz, 25µV_rms noise, SOT23-3	Higher output tolerance and lower PSRR reduce margin in RF-sensitive designs	Choose only if cost sensitivity outweighs need for 1% accuracy and 75dB noise rejection.

Compared with MCP1700T-1102E/TT and XC6206P112MR-G, AP7315-11SR-7 uniquely balances 150mA drive capability, ±1% accuracy, and 75dB PSRR in the same SOT23-3 footprint - making it the only option suitable for RF PA bias where both current headroom and noise immunity are non-negotiable.

Availability

AP7315-11SR-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, low-voltage microcontroller core supply, camera sensor analog front-end, and wireless audio codec reference supply requiring stable component supply across production ramps and long-lifecycle programs.

Supply support for AP7315-11SR-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 ICs, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q standards.

The AP7315 series belongs to Diodes' high-PSRR, low-noise LDO portfolio - engineered specifically for noise-sensitive RF and analog subsystems in portable communications equipment where small size and precision regulation are mandatory.

FAQ

What is the minimum input voltage required for AP7315-11SR-7 to regulate 1.1V output at 150mA?

The minimum input voltage is 1.60V: calculated from typical 0.50V dropout at 150mA plus nominal 1.1V output. Absolute minimum specified is 1.7V per datasheet - operating below this risks loss of regulation and increased output ripple due to insufficient headroom for internal pass transistor control.

Can AP7315-11SR-7 be used without an enable signal?

Yes - tie the EN pin directly to VIN to maintain permanent operation. The device has no internal pull-up; leaving EN floating is prohibited as it may cause erratic enable/disable behavior due to noise coupling, potentially damaging downstream circuitry during unstable regulation states.

Is a bypass capacitor required on the VOUT pin, and what value is recommended?

A 0.47µF X5R/X7R ceramic capacitor is mandatory and must be placed within 2mm of the VOUT and GND pins. This value ensures stability across temperature and load, satisfies the ESR vs. output current stability boundary, and maintains 75dB PSRR performance - smaller values risk oscillation under transient loads.

Does AP7315-11SR-7 include reverse-current protection or output discharge functionality?

No - AP7315-11SR-7 is the non-discharge variant (no "D" suffix). It lacks an internal discharge FET; when disabled, VOUT remains floating and decays only through external load or leakage. For rapid VOUT discharge, select AP7315D-11SR-7, which adds a 30Ω on-resistance NMOS between VOUT and GND during shutdown.

AP7315-11SR-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

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):: 1.1V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.64V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 60 µA

Current - Supply (Max):: 100 µA

PSRR:: 75dB (1kHz)

Control Features:: -

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

AP7315-11SR-7 FAQ

1.How can I place an order for AP7315-11SR-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-11SR-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 AP7315-11SR-7 reliable?

The price and inventory of AP7315-11SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-11SR-7 is usually 5 days.

3.What payment methods are accepted for AP7315-11SR-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-11SR-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-11SR-7?

AP7315-11SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-11SR-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 AP7315-11SR-7?

For technical support, including AP7315-11SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-11SR-7 requirements.

6.How does Aetrix verify that AP7315-11SR-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-11SR-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 AP7315-11SR-7 meets industry standards.

7.What is the process for return or replacement of AP7315-11SR-7?

All AP7315-11SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-11SR-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 AP7315-11SR-7 part is unused and in its original packaging.

Return procedure for AP7315-11SR-7:

1.Submit a request within 90 days.

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

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