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

Diodes Incorporated AP7315-15SR-7

Name: AP7315-15SR-7
Brand: Diodes Incorporated
SKU: AP7315-15SR-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-15SR-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-15SR-7.pdf

Description:: IC REG LINEAR 1.5V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,681

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Product details

Overview

AP7315-15SR-7 from Diodes Incorporated is a 1.5V 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 - designed for RF supply rails and portable media player core logic in SOT23-3 package.

For engineers reviewing the AP7315-15SR-7 datasheet, AP7315-15SR-7 pinout, AP7315-15SR-7 application, or AP7315-15SR-7 equivalent, this page delivers verified electrical specs, thermal layout guidance, enable control thresholds, dropout behavior across temperature, and real-world load transient response data per DS38352 Rev. 2-2.

Technical Context

The AP7315-15SR-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 non-discharge architecture maintains output voltage during shutdown, avoiding unintended discharge of downstream capacitance.

It operates across 1.7V to 5.25V input range with guaranteed 150mA output, delivering stable 1.5V ±1% under load transients up to 150mA and ambient temperatures from –40°C to +85°C. Dropout voltage is 0.38V (typ) at 150mA, optimized for battery-powered systems where headroom is constrained.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±1% at +25°C; ensures stable core voltage for low-power microcontrollers and RF ICs without external feedback.
Max Output Current	150mA guaranteed - sufficient for powering baseband processors, camera sensor interfaces, or Bluetooth SoCs in handheld devices.
PSRR	75dB at 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for sensitive RF/analog sections.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise in VCOs and jitter in high-speed serial links powered by this rail.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes or standby modes of portable media players.
Dropout Voltage	0.38V (typ) at 150mA - enables operation down to 1.88V input, compatible with single-cell Li-ion (2.7–4.2V) and Li-polymer batteries.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs; prevents false turn-on due to floating EN pin.

Pinout & Package

SOT23-3 (SR) package: ultra-compact 2.9mm × 1.6mm footprint with 0.95mm pitch; thermally enhanced for 400mW power dissipation in space-constrained PCBs.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Input power supply	Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed adjacent to minimize input impedance and suppress supply glitches.
GND (Pin 1)	Ground reference	Must connect directly to low-impedance ground plane; shared return path for VIN, VOUT, and EN to avoid noise coupling.
VOUT (Pin 2)	Regulated output	Delivers 1.5V ±1%; requires 0.47µF ceramic capacitor near load to ensure stability and transient response under 150mA step loads.

Key Features

Feature	Design Value
High PSRR	75dB at 1kHz - isolates noise-sensitive analog/RF circuits from noisy digital power domains.
Low-noise regulation	60µV_rms output noise - preserves signal integrity in audio codecs and high-resolution ADC/DAC reference supplies.
Ultra-low IQ	35µA quiescent current - reduces no-load power loss in battery-backed real-time clocks and wake-up controllers.
Wide input range	1.7V to 5.25V - supports direct connection to single-cell Li-ion, USB VBUS, or intermediate DC-DC outputs.
Thermal protection	Internal fold-back current limit (55mA short-circuit) - prevents thermal runaway during sustained overloads or output shorts.

Applications

RF Power Amplifier Bias

Camera Sensor Core Supply

Use Scenario: Providing clean bias voltage to GaAs pHEMT or SiGe HBT RF power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO supplying stable 1.5V to PA collector/drain node, rejecting switching noise from PMIC buck converters.

Use Value: 60µV_rms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation in transmit paths operating up to 6GHz.

Use Scenario: Powering image signal processor (ISP) cores and CIS analog front-end in smartphone rear cameras.

IC Role / Device Role / Timing Role: Fixed 1.5V LDO delivering regulated supply to ISP logic and analog blocks, synchronized with frame timing via enable control.

Use Value: ±1% output accuracy and 0.38V dropout ensure consistent pixel processing performance across battery discharge cycles (3.0–3.7V).

Bluetooth LE Audio Codec

Portable Media Player DSP Core

Use Scenario: Supplying 1.5V to Bluetooth LE audio SoC digital signal processors and DACs in true wireless stereo earbuds.

IC Role / Device Role / Timing Role: Enable-controlled LDO activated only during audio playback, minimizing idle power draw in compact form factors.

Use Value: 35µA quiescent current extends battery runtime beyond 8 hours; fast enable response (<10µs) eliminates audio pop during resume.

Use Scenario: Regulating 1.5V for ARM Cortex-M4-based audio DSP in portable MP3/FLAC players with OLED displays.

IC Role / Device Role / Timing Role: Primary core rail LDO supporting burst-mode processing of high-bitrate audio streams with dynamic load steps up to 150mA.

Use Value: 150mA output capability and <100µs load transient recovery maintain deterministic DSP execution without voltage droop-induced glitches.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1502E/TT	1.5V fixed, 250mA output, 6µA IQ, but only 60dB PSRR at 1kHz and 120µV_rms noise	Better for ultra-low-power sleep modes; insufficient for RF supply due to lower PSRR/noise performance	Select when lowest quiescent current dominates over RF noise rejection requirements.
Torex XC6206P152MR-G	1.5V fixed, 150mA, 35µA IQ, 70dB PSRR at 1kHz, 80µV_rms noise, SOT23-3 package	Higher output noise degrades SNR in audio DACs; slightly lower PSRR affects RF PA linearity	Acceptable for non-RF digital logic rails where 75dB PSRR is not mandatory.

Compared with MCP1700T-1502E/TT and XC6206P152MR-G, the AP7315-15SR-7 uniquely balances 75dB PSRR, 60µV_rms noise, and 35µA IQ in SOT23-3 - making it optimal for RF-biased and high-fidelity audio subsystems where both noise and efficiency matter.

Availability

AP7315-15SR-7 is available at Aetrix Electronics and suitable for RF power amplifier biasing, camera sensor core supply, and portable media player DSP core applications requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7315-15SR-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-PSRR, low-noise LDO product line - engineered specifically for noise-sensitive portable electronics including smartphones, wearables, and wireless audio devices.

FAQ

What is the maximum input voltage rating for AP7315-15SR-7?

The absolute maximum input voltage is 6.0V, but recommended operating range is 1.7V to 5.25V. Exceeding 5.25V risks permanent damage per DS38352 Rev. 2-2 Absolute Maximum Ratings. Operation above 5.25V violates design specifications and may degrade long-term reliability even if within 6.0V stress limit.

Does AP7315-15SR-7 include output discharge functionality?

No - AP7315-15SR-7 is the non-discharge variant. It lacks an internal pull-down transistor on VOUT; output voltage remains present after EN is pulled low. For automatic output discharge, select AP7315D-15SR-7, which adds a 30Ω NMOS between VOUT and GND when disabled.

Can AP7315-15SR-7 be used with ceramic capacitors smaller than 0.47µF?

No - Diodes specifies minimum 0.47µF ceramic output capacitance for stability across all load conditions. Using smaller values risks oscillation or degraded transient response, as confirmed in Application Information section of DS38352. ESR must also remain below 100mΩ per stability curves on page 11.

How does thermal performance differ between SOT23-3 (SR) and X2-DFN1010-4 packages?

SOT23-3 (SR) has higher thermal resistance: θ_JA ≈ 250°C/W on JEDEC High-K board vs. ~180°C/W for X2-DFN1010-4. At 150mA and 1.7V dropout, SR package dissipates ~255mW - limiting continuous operation to ≤+65°C ambient unless PCB copper area is maximized per layout guidelines in DS38352 page 11.

AP7315-15SR-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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.49V @ 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

AP7315-15SR-7 FAQ

1.How can I place an order for AP7315-15SR-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-15SR-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 AP7315-15SR-7 reliable?

The price and inventory of AP7315-15SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-15SR-7 is usually 5 days.

3.What payment methods are accepted for AP7315-15SR-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-15SR-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-15SR-7?

AP7315-15SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-15SR-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 AP7315-15SR-7?

For technical support, including AP7315-15SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-15SR-7 requirements.

6.How does Aetrix verify that AP7315-15SR-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-15SR-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 AP7315-15SR-7 meets industry standards.

7.What is the process for return or replacement of AP7315-15SR-7?

All AP7315-15SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-15SR-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 AP7315-15SR-7 part is unused and in its original packaging.

Return procedure for AP7315-15SR-7:

1.Submit a request within 90 days.

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

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