My Inquiry
My Account
Diodes Incorporated AP7315-31SA-7
- Part No.:
- AP7315-31SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7315-31SA-7.pdf
- Description:
- IC REG LINEAR 3.1V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,757
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7315-31SA-7 from Diodes Incorporated is a 3.1V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features CMOS-based architecture, enable control, and is optimized for RF supply and portable media applications in space-constrained SOT23 packages.
For engineers reviewing the AP7315-31SA-7 datasheet, AP7315-31SA-7 pinout, AP7315-31SA-7 application, or AP7315-31SA-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes Incorporated's DS38352 Rev. 2-2 specification.
Technical Context
The AP7315-31SA-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 0.5V max logic-low threshold and 1.3V min logic-high threshold, supporting low-power system sequencing.
Designed for high-PSRR noise-sensitive rails, it achieves 75dB ripple rejection at 1kHz while maintaining stability with only 0.47µF ceramic input/output capacitors. Dropout voltage is 210mV typical at 150mA for VOUT = 3.1V, enabling operation down to VIN = 3.31V under full load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1V ±1% - ensures stable biasing for 3.3V-tolerant RF ICs without external feedback network |
| Max Output Current | 150mA - sufficient for powering baseband processors, camera ISPs, or wireless transceivers in handheld devices |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC/DC converters feeding adjacent analog/RF blocks |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise degradation in VCOs and LNAs |
| Quiescent Current | 35µA typical - extends battery life in always-on sensor or standby-mode subsystems |
| Dropout Voltage | 210mV at 150mA - enables efficient regulation from single-cell Li-ion (3.4V min) or 3.3V system rails |
| Input Voltage Range | 1.7V to 5.25V - supports direct connection to USB-powered or multi-rail embedded systems |
Pinout & Package
AP7315-31SA-7 uses the SOT23-3 (SA) package: ultra-compact 2.9mm × 1.6mm × 1.1mm footprint with gull-wing leads, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Power input | Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed adjacent to minimize input impedance and supply glitches |
| GND (Pin 1) | Ground reference | Primary return path for load current and internal bias; must connect directly to low-impedance ground plane |
| VOUT (Pin 2) | Regulated output | Delivers stable 3.1V ±1%; output capacitor (0.47µF ceramic) must be placed within 2mm of this pin for transient stability |
| EN (Not present) | Enable control | Not implemented in SA variant - device operates continuously; EN functionality is available only in SOT25 and DFN packages |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB @ 1kHz - maintains clean power delivery to RF sections despite noisy shared input rails |
| Ultra-low noise | 60µVrms (10Hz–100kHz) - prevents signal-to-noise ratio degradation in analog front-ends and audio codecs |
| Tight output accuracy | ±1% over temperature - eliminates need for post-regulation trimming in precision analog subsystems |
| Low quiescent current | 35µA - reduces no-load power loss by >50% vs. legacy bipolar LDOs, critical for battery longevity |
| Wide input range | 1.7–5.25V - accommodates aging batteries and mixed-voltage system designs without redesign |
Applications
| RF Power Amplifier Bias | Camera Image Signal Processor (ISP) |
|---|---|
|
Use Scenario: Providing clean, low-noise bias to GaAs pHEMT or SiGe HBT power amplifiers in 4G/5G mobile front-ends. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 3.1V rail with minimal phase noise coupling into transmit chain. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation in high-order QAM signals. |
Use Scenario: Powering the analog core and ADC section of a mobile camera ISP during active image capture. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO supplying critical analog supply for pixel readout and correlated double sampling. Use Value: 210mV dropout and 35µA IQ enable reliable operation from partially discharged batteries while preserving dynamic range. |
| Wireless Adapter Baseband | Portable Media Player Audio DAC |
|
Use Scenario: Regulating power to Bluetooth/Wi-Fi SoC baseband processors in compact dongles and wearables. IC Role / Device Role / Timing Role: Enable-free LDO providing always-on 3.1V supply for low-latency wake-up and packet processing. Use Value: SOT23-3 footprint and 150mA capability support miniaturized PCBs without sacrificing thermal margin or load step response. |
Use Scenario: Supplying the reference and analog output stage of a stereo audio DAC in portable music players. IC Role / Device Role / Timing Role: Ultra-low-noise LDO isolating sensitive audio circuitry from digital switching noise on shared system rails. Use Value: 60µVrms noise floor ensures >105dB SNR performance, 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 |
|---|---|---|---|
| MCP1700T-3102E/TT | 3.1V fixed, 250mA, 6µA IQ, but only 60dB PSRR at 1kHz and 120µVrms noise | Lacks RF-grade noise/PSRR performance; suitable for digital-only rails, not analog/RF | Select when ultra-low IQ dominates over noise/PSRR requirements and higher output current is needed |
| TPS7A0530PDBVR | 3.0V fixed, 200mA, 25µA IQ, 70dB PSRR at 1kHz, 8µVrms noise (10Hz–100kHz) | Lower noise but 0.1V lower output; requires layout revision for 3.0V tolerance in downstream ICs | Choose for lowest noise and IQ where 3.0V compatibility is confirmed and 3.1V is not mandated |
Compared with MCP1700T-3102E/TT and TPS7A0530PDBVR, AP7315-31SA-7 uniquely balances 3.1V output accuracy, 75dB PSRR, and 60µVrms noise in the smallest SOT23-3 footprint - making it optimal for RF and imaging subsystems where voltage, noise, and size are jointly constrained.
Availability
AP7315-31SA-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera ISP supply, wireless adapter baseband, and portable media player audio DAC applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7315-31SA-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, with design centers across Asia, Europe, and the US, and manufacturing certified to IATF 16949 and ISO 9001 standards.
The AP7315 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable electronics - including smartphones, tablets, and wireless modules - where clean, efficient, and space-saving power regulation is critical.
FAQ
Does AP7315-31SA-7 include an enable pin?
No. The SA suffix denotes the SOT23-3 package variant, which has only three pins: VIN, GND, and VOUT. Enable functionality is physically absent - the device operates continuously when powered. For enable control, select the SOT25 (W5) or X2-DFN1010-4 (FS4) variants, which include a dedicated EN pin.
What is the minimum input voltage required for 3.1V output at 150mA?
The typical dropout voltage is 210mV at 150mA and +25°C. Therefore, the minimum input voltage is 3.1V + 0.21V = 3.31V. At -40°C or +85°C, worst-case dropout rises to 290mV, requiring VIN ≥ 3.39V for guaranteed regulation under full load and temperature extremes.
Can AP7315-31SA-7 replace AP7315-31SR-7 in a design?
Yes - both share identical electrical specifications and SOT23-3 mechanical form factor. The SR variant uses a different marking code (5DT vs. 15S) and is qualified for automotive change control per AEC-Q100, whereas SA is commercial-grade. Substitution is electrically safe but requires validation if automotive qualification is required.
Is an input capacitor mandatory for AP7315-31SA-7?
Yes. A minimum 0.47µF X5R/X7R ceramic capacitor must be placed between VIN and GND, located within 2mm of the device. This prevents input voltage sag during load transients and ensures stability - omission risks output oscillation or failure to regulate under dynamic loads.
AP7315-31SA-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):
- 3.1V
- 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
AP7315-31SA-7 FAQ
1.How can I place an order for AP7315-31SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315-31SA-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 AP7315-31SA-7 reliable?
The price and inventory of AP7315-31SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-31SA-7 is usually 5 days.
3.What payment methods are accepted for AP7315-31SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-31SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315-31SA-7?
AP7315-31SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315-31SA-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 AP7315-31SA-7?
For technical support, including AP7315-31SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-31SA-7 requirements.
6.How does Aetrix verify that AP7315-31SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7315-31SA-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 AP7315-31SA-7 meets industry standards.
7.What is the process for return or replacement of AP7315-31SA-7?
All AP7315-31SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-31SA-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 AP7315-31SA-7 part is unused and in its original packaging.
Return procedure for AP7315-31SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7315-31SA-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
