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 AP7315-33SA-7

Name: AP7315-33SA-7
Brand: Diodes Incorporated
SKU: AP7315-33SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP7315-33SA-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-33SA-7.pdf

Description:: IC REG LINEAR 3.3V 150MA SOT23

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,305

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

Product details

Overview

AP7315-33SA-7 from Diodes Incorporated is a 3.3V 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 and portable media applications where low noise and high power-supply rejection are critical.

For engineers reviewing the AP7315-33SA-7 datasheet, AP7315-33SA-7 pinout, AP7315-33SA-7 application, or AP7315-33SA-7 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in Diodes' DS38352 Rev. 2-2 specification.

Technical Context

The AP7315-33SA-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input (EN) provides precise on/off control with defined logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.3V), and it lacks internal discharge functionality (non-discharge variant).

Designed for ultra-low-noise biasing, it achieves 60µV_rms output noise over 10Hz–100kHz and maintains 75dB ripple rejection at 1kHz under 30mA load. Dropout voltage is 210mV typical at 150mA for 3.3V output, enabling stable regulation even with tight VIN–VOUT margins.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±1% at +25°C; ensures stable core/bias rail for 3.3V logic and RF ICs without external feedback.
Max Output Current	150mA guaranteed; supports moderate-power peripherals like camera modules and wireless adapters.
PSRR	75dB at 1kHz; suppresses switching noise from DC/DC converters feeding the LDO input.
Output Noise	60µV_rms (10Hz–100kHz); minimizes phase noise in RF synthesizers and jitter in high-speed interfaces.
Quiescent Current	35µA typical at no load; extends battery life in always-on sensor or standby circuits.
Input Voltage Range	1.7V to 5.25V; compatible with single-cell Li-ion (3.0–4.2V), 3.3V system rails, and boosted 5V supplies.
Dropout Voltage	210mV typical at 150mA; allows operation with only 3.51V input for clean 3.3V output.

Pinout & Package

SOT23-3 (SA) package: ultra-compact 2.9mm × 1.6mm footprint with exposed pad not connected internally; requires PCB copper area for thermal dissipation but not as GND electrode.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 2)	Regulated power output	Delivers stable 3.3V to load; must be decoupled with ≥0.47µF ceramic capacitor placed adjacent to pin.
GND (Pin 1)	Reference and return path	Primary ground connection; ties to system ground plane to minimize impedance and stabilize regulation.
EN (Pin 3)	Enable control input	Active-high logic: ≥1.3V enables regulator; ≤0.5V disables it into 0.01µA standby mode.
VIN (Pin 3)	Unregulated input supply	Accepts 1.7–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed within 2mm of pin.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz ensures immunity to noise from upstream switching regulators in mixed-signal systems.
Ultra-Low Noise	60µV_rms (10Hz–100kHz) preserves signal integrity in analog front-ends and RF receivers.
Precision Output Accuracy	±1% over temperature and line/load ensures reliable operation of 3.3V I/O interfaces and memory.
Low Quiescent Current	35µA typical enables >1-year battery life in coin-cell-powered IoT sensors at 150µA average load.
Wide Input Range	1.7V–5.25V supports direct connection to Li-ion, USB, or regulated 3.3V/5V rails without pre-regulation.

Applications

RF Power Amplifier Bias

Camera Sensor Core Supply

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

IC Role / Device Role / Timing Role: Low-noise LDO delivering stable 3.3V to PA drain supply, rejecting switching noise from PMIC DC/DC converters.

Use Value: 60µV_rms noise and 75dB PSRR directly reduce AM-to-PM distortion and improve EVM in transmit paths.

Use Scenario: Powering high-resolution CMOS image sensors in smartphone rear cameras requiring minimal temporal noise.

IC Role / Device Role / Timing Role: Fixed 3.3V LDO supplying analog core and PLL circuits, with fast load transient response (<100µs settling).

Use Value: ±1% accuracy and <210mV dropout ensure consistent pixel response across battery discharge (3.0–4.2V VIN).

Wireless Adapter SoC Core

Portable Media Player Audio Codec

Use Scenario: Regulating core voltage for Wi-Fi/BT combo chips in compact dongles and wearables.

IC Role / Device Role / Timing Role: Enable-controlled 3.3V LDO supporting dynamic power gating during sleep modes.

Use Value: 0.01µA shutdown current and 35µA quiescent current extend runtime in intermittent-traffic applications.

Use Scenario: Supplying low-noise analog rails to stereo audio DACs and headphone amplifiers in MP3 players.

IC Role / Device Role / Timing Role: Ultra-low-noise LDO powering DAC reference and op-amp stages to minimize audible hiss.

Use Value: 60µV_rms noise floor translates to >105dB SNR, meeting Hi-Res Audio certification requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3302E/TO	3.3V fixed, 250mA, 6µA IQ, but only 60dB PSRR @ 1kHz and 120µV_rms noise.	Lacks RF-grade noise/PSRR performance; suitable for digital-only loads, not RF or precision analog.	Choose when ultra-low IQ dominates over noise/PSRR; verify dropout (600mV @ 250mA) suffices for VIN margin.
Torex XC6206P332MR-G	3.3V fixed, 150mA, 15µA IQ, 70dB PSRR @ 1kHz, 40µV_rms noise, SOT23-3 pinout identical.	Lower noise than AP7315-33SA-7 but narrower input range (1.8–6.0V vs. 1.7–5.25V); no EN pin.	Select when EN control is unnecessary and lowest possible noise is critical; confirm 1.8V min VIN compatibility.

Compared with MCP1700-3302E/TO and XC6206P332MR-G, the AP7315-33SA-7 uniquely balances RF-grade PSRR/noise, enable functionality, and wide 1.7V input support - making it optimal for battery-powered RF and imaging systems where all three traits are required simultaneously.

Availability

AP7315-33SA-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor core supply, and portable media player audio codec applications requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for AP7315-33SA-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-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP7315 series belongs to Diodes' precision LDO portfolio, engineered specifically for noise-sensitive portable electronics - emphasizing low IQ, high PSRR, and tight output accuracy in miniature packages.

FAQ

What is the minimum input voltage required for AP7315-33SA-7 to regulate 3.3V output at 150mA?

The typical dropout voltage is 210mV at 150mA and +25°C, so minimum input is 3.3V + 0.21V = 3.51V. At -40°C or +85°C, worst-case dropout rises to 290mV per datasheet Table 2, requiring ≥3.59V input for guaranteed regulation across temperature.

Can the EN pin be left unconnected, or does it require a pull-up?

The EN pin must never be left floating. To ensure reliable operation, tie EN to VIN via a direct connection or 100kΩ pull-up resistor. Floating EN causes unpredictable enable/disable behavior due to leakage-induced threshold violations.

Is AP7315-33SA-7 qualified for automotive applications?

No - AP7315-33SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7315Q) with PPAP capability and IATF 16949 manufacturing, but this SA-packaged part is intended for commercial portable electronics only.

What output capacitor value and type are recommended for stable operation?

A minimum 0.47µF X5R/X7R ceramic capacitor is required, placed within 2mm of VOUT and GND pins. For loads with >50mA step changes, add a 4.7µF–10µF low-ESR tantalum or polymer capacitor in parallel to improve transient response.

AP7315-33SA-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):: 3.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.29V @ 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

AP7315-33SA-7 FAQ

1.How can I place an order for AP7315-33SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-33SA-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 AP7315-33SA-7 reliable?

The price and inventory of AP7315-33SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-33SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-33SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-33SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-33SA-7?

AP7315-33SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-33SA-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 AP7315-33SA-7?

For technical support, including AP7315-33SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-33SA-7 requirements.

6.How does Aetrix verify that AP7315-33SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-33SA-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 AP7315-33SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-33SA-7?

All AP7315-33SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-33SA-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 AP7315-33SA-7 part is unused and in its original packaging.

Return procedure for AP7315-33SA-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…