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

Diodes Incorporated AP7315-22SR-7

Name: AP7315-22SR-7
Brand: Diodes Incorporated
SKU: AP7315-22SR-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-22SR-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-22SR-7.pdf

Description:: IC REG LINEAR 2.2V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7315-22SR-7 from Diodes Incorporated is a 2.2V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It features CMOS-based architecture, enable control, and ultra-low 35µA quiescent current - designed for powering RF supply rails and camera sensor bias in space-constrained portable electronics.

For engineers reviewing the AP7315-22SR-7 datasheet, AP7315-22SR-7 pinout, AP7315-22SR-7 application, or AP7315-22SR-7 equivalent, key selection criteria include dropout voltage at 150mA (max 0.34V), EN logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.3V), thermal performance in SOT23-3, and compatibility with 0.47µF ceramic input/output capacitors.

Technical Context

The AP7315-22SR-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input directly controls NMOS pass transistor gate drive, supporting fast turn-on/turn-off transitions without external components.

It operates across 1.7V–5.25V input range while maintaining stable 2.2V output under load transients up to 150mA. The device achieves high PSRR via internal compensation and low-noise biasing, with output stability guaranteed using 0.47µF ceramic capacitors on both input and output.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.2V ±1% - ensures precise biasing for RF ICs and image sensors requiring tight voltage tolerance.
Max Output Current	150mA - supports moderate-power analog blocks like camera ISPs or Bluetooth SoC I/O domains.
Dropout Voltage	0.34V max at 150mA - enables operation from 2.54V input, compatible with single-cell Li-ion or boosted 2.5V rails.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared power planes.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise impact on RF synthesizers and ADC reference stability.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby modes of portable media devices.
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting.

Pinout & Package

AP7315-22SR-7 is housed in the SOT23-3 (SR) package - a 2.9mm × 1.3mm × 1.0mm surface-mount outline with gull-wing leads. Thermal performance is enhanced by direct die attachment to the exposed copper pad on the bottom side, recommended to be connected to PCB ground plane for optimal heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Input power supply connection	Accepts 1.7V–5.25V; requires 0.47µF ceramic capacitor placed within 2mm for stability and transient suppression.
GND (Pin 1)	Power ground reference	Must connect to low-impedance PCB ground plane; serves as return path for VIN, VOUT, and EN currents.
VOUT (Pin 2)	Regulated output terminal	Delivers 2.2V ±1% to load; requires 0.47µF ceramic capacitor placed adjacent to pin for ESR-driven stability.
EN (Not present)	Enable control input	Not implemented in SR variant - regulator is permanently enabled; no external pull-up required.

Key Features

Feature	Design Value
Ultra-low quiescent current	35µA typical - reduces standby power loss in battery-powered systems with intermittent wake cycles.
High PSRR at audio frequencies	75dB @ 1kHz - mitigates ripple from buck converter switching edges before reaching sensitive analog circuits.
Low-noise output	60µV_rms (10Hz–100kHz) - preserves SNR in camera analog front-ends and RF receiver chains.
Guaranteed 150mA output	Full rated current delivered across -40°C to +85°C ambient - eliminates derating in industrial handheld designs.
Small-footprint packaging	SOT23-3 (2.9 × 1.3 mm) - enables dense layout in slim smartphones, wireless earbuds, and compact IoT modules.

Applications

RF Power Amplifier Bias

Camera Image Sensor Core Supply

Use Scenario: Providing clean, stable 2.2V 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 regulated core voltage independent of noisy switched-mode power supply rails.

Use Value: 60µV_rms noise prevents AM-to-PM conversion in PA stages, preserving EVM and spectral mask compliance.

Use Scenario: Supplying 2.2V to CIS analog pixel array and column ADC in smartphone main cameras.

IC Role / Device Role / Timing Role: Precision voltage source maintaining constant sensor operating point during rapid exposure changes.

Use Value: ±1% output accuracy ensures consistent quantum efficiency and dark current across temperature and aging.

Wireless Audio Codec Reference

Bluetooth SoC I/O Domain Regulator

Use Scenario: Generating low-noise 2.2V reference for stereo DAC/ADC in true wireless stereo (TWS) earbuds.

IC Role / Device Role / Timing Role: Dedicated LDO isolating audio signal chain from digital switching noise generated by Bluetooth baseband.

Use Value: 75dB PSRR at 1kHz rejects clock feedthrough from 2.4GHz radio synthesizer, reducing audible hiss.

Use Scenario: Powering 2.2V I/O banks of Bluetooth 5.x SoCs interfacing with touch controllers and MEMS microphones.

IC Role / Device Role / Timing Role: Local regulation ensuring VIH/VIL margins are maintained despite PCB trace IR drop.

Use Value: 0.34V dropout allows reliable operation from 2.54V intermediate rail, simplifying multi-rail PMIC selection.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2202E/TO	2.2V fixed, 250mA, 6µA IQ, but only 60dB PSRR @ 1kHz and 120µV_rms noise	Lacks RF-grade noise/PSRR performance; suitable for non-sensitive digital I/O, not RF or imaging	Select when ultra-low IQ dominates over noise/PSRR requirements, e.g., long-life sensor nodes
Torex XC6210B222MR-G	2.2V fixed, 150mA, 30µA IQ, 70dB PSRR @ 1kHz, 45µV_rms noise, but requires 1µF output cap	Better noise, slightly lower PSRR; needs larger output capacitance than AP7315's 0.47µF minimum	Prefer where lowest possible noise is critical and board space allows 1µF ceramic placement

Compared with MCP1700-2202E/TO and XC6210B222MR-G, AP7315-22SR-7 uniquely balances 75dB PSRR, 60µV_rms noise, and 0.47µF capacitor compatibility - making it optimal for RF and imaging subsystems where both noise rejection and layout density are constrained.

Availability

AP7315-22SR-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera image sensor core supply, wireless audio codec reference, and Bluetooth SoC I/O domain regulation requiring stable component supply across consumer, industrial, and medical portable electronics.

Supply support for AP7315-22SR-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 power management, signal integrity, and protection solutions for high-volume electronics markets.

The AP7315 series belongs to Diodes' precision LDO portfolio, engineered specifically for noise-sensitive portable applications including smartphones, wearables, and wireless communication modules where small size, low IQ, and high PSRR are mandatory.

FAQ

Is AP7315-22SR-7 pin-compatible with other SOT23-3 LDOs?

No - AP7315-22SR-7 uses a non-standard pinout: Pin 1 = GND, Pin 2 = VOUT, Pin 3 = VIN. Most SOT23-3 LDOs follow VIN–GND–VOUT or VIN–VOUT–GND arrangements. This configuration minimizes trace length between GND and VOUT for improved stability but requires careful PCB layout verification.

Does AP7315-22SR-7 include output discharge functionality?

No - the "SR" suffix denotes the standard SOT23-3 package without auto-discharge. Unlike AP7315D variants, this part lacks an internal NMOS discharge switch between VOUT and GND. When disabled, output voltage decays only through load leakage and external capacitor discharge paths.

What is the minimum recommended input capacitor for AP7315-22SR-7?

A 0.47µF X5R/X7R ceramic capacitor is the minimum recommended value, placed within 2mm of the VIN and GND pins. Larger values (e.g., 1µF–10µF) improve transient response under dynamic loads but are not required for basic stability per the datasheet.

Can AP7315-22SR-7 operate from a 2.4V lithium coin cell?

Yes - with 2.2V output and 0.34V max dropout at 150mA, the device functions down to 2.54V input. A fresh CR2032 delivers ~3.0V open-circuit, sustaining >2.54V for most of its discharge curve under light loads (<50mA), making it viable for low-duty-cycle sensor nodes.

AP7315-22SR-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):: 2.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.38V @ 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

AP7315-22SR-7 FAQ

1.How can I place an order for AP7315-22SR-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-22SR-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 AP7315-22SR-7 reliable?

The price and inventory of AP7315-22SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-22SR-7 is usually 5 days.

3.What payment methods are accepted for AP7315-22SR-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-22SR-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-22SR-7?

AP7315-22SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-22SR-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 AP7315-22SR-7?

For technical support, including AP7315-22SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-22SR-7 requirements.

6.How does Aetrix verify that AP7315-22SR-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-22SR-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 AP7315-22SR-7 meets industry standards.

7.What is the process for return or replacement of AP7315-22SR-7?

All AP7315-22SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-22SR-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 AP7315-22SR-7 part is unused and in its original packaging.

Return procedure for AP7315-22SR-7:

1.Submit a request within 90 days.

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

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