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 AP7315-135SR-7

Name: AP7315-135SR-7
Brand: Diodes Incorporated
SKU: AP7315-135SR-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP7315-135SR-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-135SR-7.pdf

Description:: IC REG LINEAR 1.35V 150MA SOT23

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,796

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

Product details

Overview

AP7315-135SR-7 from Diodes Incorporated is a 1.35V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, operates from 1.7V to 5.25V input, and is optimized for RF supply rails in compact portable devices.

For engineers reviewing the AP7315-135SR-7 datasheet, AP7315-135SR-7 pinout, AP7315-135SR-7 application, or AP7315-135SR-7 equivalent, key selection criteria include dropout voltage at 150mA (0.50V typ. for 1.35V V_OUT), thermal performance in SOT23-3, EN logic thresholds (0.5V low / 1.3V high), and compatibility with 0.47µF ceramic input/output capacitors.

Technical Context

The AP7315-135SR-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit protection. Its non-discharge output stage avoids automatic V_OUT discharge during shutdown-critical for systems requiring controlled power sequencing.

It delivers stable regulation across –40°C to +85°C ambient, supports fast load transient response via low-ESR ceramic capacitors, and maintains 0.5% line regulation (0.02%/V) and 0.5% load regulation (0.5%/A) under full 150mA load-enabling reliable biasing of noise-sensitive analog and RF circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.35V ±1% - ensures precise biasing for 1.35V I/O domains and low-voltage RF ICs without external feedback.
Max Output Current	150mA continuous - sufficient for powering baseband processors, camera sensors, or wireless transceivers in handheld form factors.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy power rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise degradation in local oscillators and ADC reference paths.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby modes of portable media players.
Dropout Voltage	0.50V at 150mA - enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline (2.4V min) with margin.
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V and 3.3V GPIOs for clean digital control without level-shifting.

Pinout & Package

AP7315-135SR-7 is housed in a RoHS-compliant SOT23-3 package (JEDEC TO-236AB), with 1.3mm × 1.0mm footprint and 0.95mm height. Thermal pad is absent; PCB copper pour under the package is not required but recommended for enhanced heat dissipation in high-ambient environments.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Input power supply	Accepts 1.7V–5.25V; requires 0.47µF ceramic capacitor placed within 2mm of pin for stability and transient immunity.
GND (Pin 1)	Ground reference	Low-impedance return path for input/output currents; must connect directly to main system ground plane to minimize noise coupling.
VOUT (Pin 2)	Regulated output	Delivers 1.35V ±1%; output capacitor (0.47µF ceramic) must be placed adjacent to this pin and GND for optimal transient response.
EN (Not present)	Enable control	Not implemented in SR variant - device is permanently enabled; EN functionality is only available in SA/SOT25/DFN variants (e.g., AP7315-135SA-7).

Key Features

Feature	Design Value
Ultra-low noise output	60µV_rms (10Hz–100kHz) - preserves signal integrity in RF front-ends and precision analog signal chains.
High PSRR at audio frequencies	75dB @ 1kHz - rejects ripple from buck converter switching frequencies and their harmonics.
Low quiescent current	35µA - reduces no-load power loss by >50% vs. legacy LDOs, critical for battery runtime in IoT endpoints.
Wide input voltage range	1.7V–5.25V - supports direct connection to single-cell Li-ion, USB VBUS, or multi-cell alkaline supplies.
±1% output accuracy	Guaranteed over temperature and line/load - eliminates need for post-regulation trimming in production test.

Applications

RF Power Amplifier Bias

Camera Sensor Core Supply

Use Scenario: Providing clean, stable bias to GaAs pHEMT power amplifiers in 4G/5G mobile handsets.

IC Role / Device Role / Timing Role: Low-noise LDO delivering 1.35V at up to 150mA with minimal PSK/EVM degradation.

Use Value: 60µV_rms noise prevents AM-to-PM conversion; 75dB PSRR isolates PA from noisy PMIC switchers.

Use Scenario: Powering CIS image sensor analog core and PLL circuits in smartphone rear cameras.

IC Role / Device Role / Timing Role: Primary 1.35V supply ensuring low-jitter clock generation and consistent pixel response.

Use Value: ±1% accuracy maintains sensor gain calibration; 35µA IQ enables low-power preview mode without frame drop.

Wireless Adapter SoC I/O Rail

Portable Media Player Audio Codec

Use Scenario: Supplying 1.35V I/O interface for Wi-Fi/BT combo chips in compact dongles and wearables.

IC Role / Device Role / Timing Role: Regulator for SDIO, UART, and SPI interface voltages with fast load-step response.

Use Value: 0.50V dropout allows operation down to 1.85V input; 0.47µF C_OUT enables ultra-small BOM count.

Use Scenario: Generating clean 1.35V supply for stereo audio DAC/ADC in flash-based MP3 players.

IC Role / Device Role / Timing Role: Low-noise analog rail decoupling sensitive sigma-delta modulators and filters.

Use Value: 60µV_rms noise avoids audible hiss; 150mA rating supports simultaneous playback and Bluetooth streaming.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1302E/TT	1.3V fixed output, 250mA, 6µA IQ, no enable pin - lower noise (30µV_rms) but tighter V_OUT tolerance (±0.4%)	Suitable for ultra-low-power sensor nodes where 0.05V V_OUT offset is acceptable	Select when lowest possible quiescent current dominates over PSRR and package size.
TPS7A0213PDQNR	1.3V fixed output, 300mA, 25µA IQ, enable pin, 70dB PSRR @ 1kHz - smaller X2SON-4 package (0.8mm × 0.8mm)	Better suited for space-constrained designs needing higher current headroom and active enable control	Choose when board area is critical and EN functionality is required for system-level power sequencing.

Compared with MCP1700T-1302E/TT and TPS7A0213PDQNR, AP7315-135SR-7 offers superior PSRR (75dB vs. ≤70dB) and wider input range (1.7–5.25V vs. 2.0–6.0V or 1.4–5.5V), making it preferred for mixed-rail systems with variable input sources and stringent noise rejection needs.

Availability

AP7315-135SR-7 is available at Aetrix Electronics and suitable for RF supply, camera sensor bias, portable media player audio rails, and wireless adapter I/O interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for AP7315-135SR-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 AP7315 series belongs to Diodes' high-performance LDO portfolio, designed specifically for noise-sensitive portable electronics where PSRR, output accuracy, and ultra-low IQ are essential for battery longevity and signal fidelity.

FAQ

Is AP7315-135SR-7 pin-compatible with other AP7315 variants?

No. The SR suffix denotes SOT23-3 packaging with no dedicated EN pin; SA variants retain EN but share same pinout, while SOT25 and DFN packages have 5-pin layouts with NC and thermal pad. Pin mapping differs across packages-only SA and SR share identical 3-pin assignment (VIN-GND-VOUT), but SA includes EN functionality internally.

What is the maximum allowable input voltage for AP7315-135SR-7?

The absolute maximum input voltage is 6.0V per datasheet Absolute Maximum Ratings. However, recommended operating VIN is 1.7V to 5.25V. Exceeding 5.25V risks exceeding power dissipation limits and may trigger thermal shutdown, especially at high ambient temperatures or full 150mA load.

Does AP7315-135SR-7 include short-circuit protection?

Yes. When VOUT is shorted to GND, the device limits output current to approximately 55–60mA (typical), preventing thermal runaway. This fold-back current limit remains active until the fault is removed, and the regulator resumes normal operation automatically upon recovery without requiring reset.

Can AP7315-135SR-7 be used with tantalum output capacitors?

Not recommended. The AP7315 is optimized for ceramic capacitors with ESR < 100mΩ. Tantalum capacitors typically exhibit higher ESR and risk instability or excessive overshoot during load transients. If bulk capacitance is needed beyond 0.47µF, parallel a low-ESR ceramic with a polymer capacitor-not tantalum.

AP7315-135SR-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):: 1.35V

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

AP7315-135SR-7 FAQ

1.How can I place an order for AP7315-135SR-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-135SR-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 AP7315-135SR-7 reliable?

The price and inventory of AP7315-135SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-135SR-7 is usually 5 days.

3.What payment methods are accepted for AP7315-135SR-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-135SR-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-135SR-7?

AP7315-135SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-135SR-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 AP7315-135SR-7?

For technical support, including AP7315-135SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-135SR-7 requirements.

6.How does Aetrix verify that AP7315-135SR-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-135SR-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 AP7315-135SR-7 meets industry standards.

7.What is the process for return or replacement of AP7315-135SR-7?

All AP7315-135SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-135SR-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 AP7315-135SR-7 part is unused and in its original packaging.

Return procedure for AP7315-135SR-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…