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Diodes Incorporated AP7315-15FS4-7B
- Part No.:
- AP7315-15FS4-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7315-15FS4-7B.pdf
- Description:
- IC REG LINEAR 1.5V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
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Product details
Overview
AP7315-15FS4-7B from Diodes Incorporated is a 1.5V 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 enable control, CMOS-based architecture, and operates from 1.7V to 5.25V input - optimized for powering RF supply rails and camera sensor bias in space-constrained portable electronics.
For engineers reviewing the AP7315-15FS4-7B datasheet, AP7315-15FS4-7B pinout, AP7315-15FS4-7B application, or AP7315-15FS4-7B equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for low-noise, high-PSRR LDO selection in battery-powered handheld systems.
Technical Context
The AP7315-15FS4-7B integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor in a single X2-DFN1010-4 package. Its non-discharge architecture maintains output voltage during shutdown without active discharge path.
It achieves 0.38V typical dropout at 150mA (for VOUT = 1.5V), supports fast load transient response via low-ESR ceramic capacitors (≥0.47µF), and guarantees stable operation across –40°C to +85°C ambient with <±30ppm/°C output voltage drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% - ensures stable bias for analog sensor circuits and RF ICs requiring tight DC regulation. |
| Max Output Current | 150mA continuous - sufficient for powering multiple low-power peripherals (e.g., image sensors, Bluetooth radios) from a single LDO. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy power domains. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise in RF local oscillators and jitter in high-speed ADC clocking paths. |
| Quiescent Current | 35µA typical - extends battery life in always-on subsystems like wake-on-motion sensors or low-power BLE receivers. |
| Input Voltage Range | 1.7V to 5.25V - compatible with single-cell Li-ion (3.0–4.2V), Li-polymer, and regulated 3.3V/5V system rails. |
| Dropout Voltage | 0.38V typ. @ 150mA - enables regulation down to ~1.88V input, supporting brown-out resilience in aging batteries. |
Pinout & Package
X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm pitch, 4-pin, exposed thermal pad) - ultra-compact footprint ideal for high-density mobile PCBs; thermal pad must be connected to GND plane for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 4) | Power input | Accepts 1.7–5.25V; requires ≥0.47µF ceramic capacitor placed adjacent to pin to suppress supply transients. |
| GND (Pin 2) | Ground reference | Primary return path for load current; must connect directly to low-impedance ground plane to minimize noise coupling. |
| EN (Pin 3) | Enable control | Active-high logic input (VIH ≥1.3V); floating state disables regulator - tie to VIN if always-on operation required. |
| VOUT (Pin 1) | Regulated output | Delivers 1.5V ±1%; requires ≥0.47µF ceramic capacitor near pin to ensure stability under dynamic load steps. |
| Thermal PAD | Thermal dissipation | Not electrically functional; must be soldered to large copper area tied to GND for ≤40°C/W junction-to-board thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB at 1kHz - rejects ripple from switching regulators without additional filtering components. |
| Ultra-low noise | 60µVrms over 10Hz–100kHz - preserves signal integrity in audio codecs and RF front-end bias networks. |
| Low quiescent current | 35µA - enables >1-year battery life in coin-cell-powered IoT nodes with periodic wake-up cycles. |
| Precision output accuracy | ±1% over temperature - eliminates need for post-regulation trimming in production calibration flows. |
| Wide input range | 1.7V–5.25V - supports direct connection to partially discharged Li-ion cells (down to ~2.8V) while maintaining regulation. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
Use Scenario: Providing clean, stable 1.5V 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: Reduces AM-to-PM distortion and improves EVM by suppressing 1–10MHz switching artifacts from PMIC outputs. |
Use Scenario: Supplying analog core voltage to high-resolution CMOS image sensors in smartphone cameras. IC Role / Device Role / Timing Role: Precision LDO ensuring consistent pixel response and minimizing fixed-pattern noise (FPN). Use Value: Enables <1 LSB gain error across temperature due to ±1% output tolerance and <±30ppm/°C drift. |
| BLE/Wi-Fi SoC I/O Rail | Portable Media Player Audio DAC Supply |
Use Scenario: Powering 1.5V I/O banks of Bluetooth 5.0 or Wi-Fi 6 companion ICs in wearables and earbuds. IC Role / Device Role / Timing Role: Enable-controlled LDO allowing dynamic rail gating during sleep modes to reduce system standby current. Use Value: Achieves <1µA shutdown current (ISTANDBY), cutting idle power by >99% versus always-on regulators. |
Use Scenario: Isolating low-jitter analog supply for stereo audio DACs in portable media players. IC Role / Device Role / Timing Role: Ultra-low-noise LDO decoupling DAC reference and analog output stages from digital switching noise. Use Value: Maintains >110dB SNR by limiting integrated noise contribution to <0.001% of full-scale output. |
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 | 150mA, 1.5V, 6µA IQ, but only 60dB PSRR @ 1kHz and 120µVrms noise | Lacks RF-grade noise/PSRR performance; suitable for non-sensitive digital I/O rails only | Choose when ultra-low IQ dominates over noise/PSRR requirements, e.g., long-life sensor nodes with infrequent transmission |
| Torex XC6210B152MR-G | 150mA, 1.5V, ±2% accuracy, 70dB PSRR @ 1kHz, 45µVrms noise, SOT-25 package | Larger footprint (SOT-25 vs. X2-DFN1010-4); slightly lower accuracy but marginally better noise | Select when board layout allows larger package and ±2% tolerance is acceptable for cost-sensitive consumer designs |
Compared with MCP1700T-1502E/TT, AP7315-15FS4-7B delivers 15dB higher PSRR and half the output noise - critical for RF/analog signal chains. Versus XC6210B152MR-G, it offers tighter ±1% accuracy and 0.2mm² smaller footprint, enabling denser routing in camera module flex PCBs.
Availability
AP7315-15FS4-7B is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, and BLE/Wi-Fi SoC I/O rail applications requiring stable component supply, high-volume tape-and-reel delivery, and long-term lifecycle assurance.
Supply support for AP7315-15FS4-7B 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 devices 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 small size, low IQ, and exceptional PSRR/noise performance are mandatory.
FAQ
What is the maximum allowable input voltage for AP7315-15FS4-7B?
The absolute maximum input voltage is 6.0V per the datasheet Absolute Maximum Ratings table. However, the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may trigger internal protection or degrade long-term reliability, even if below 6.0V stress limit.
Does AP7315-15FS4-7B include output discharge functionality?
No - AP7315-15FS4-7B is the non-discharge variant (suffix "-" not "D"). When disabled via EN pin, the output remains floating and retains its voltage until discharged by external load or leakage. For active discharge, select AP7315D-15FS4-7B.
Can AP7315-15FS4-7B operate with ceramic output capacitors smaller than 0.47µF?
The datasheet specifies 0.47µF as the minimum recommended value for stability across all operating conditions. Using smaller values (e.g., 0.22µF) may cause oscillation or degraded transient response, especially at high load currents (>100mA) or elevated temperatures.
How is thermal performance affected if the X2-DFN1010-4 thermal pad is left unconnected?
Leaving the thermal pad unconnected increases junction-to-board thermal resistance by >3×, raising die temperature by up to 45°C at 150mA load. This risks thermal shutdown or accelerated parametric drift - the pad must be soldered to a GND-connected copper pour per layout guidelines.
AP7315-15FS4-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- 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:
- X2-DFN1010-4
AP7315-15FS4-7B FAQ
1.How can I place an order for AP7315-15FS4-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315-15FS4-7B 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 AP7315-15FS4-7B reliable?
The price and inventory of AP7315-15FS4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-15FS4-7B is usually 5 days.
3.What payment methods are accepted for AP7315-15FS4-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-15FS4-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315-15FS4-7B?
AP7315-15FS4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315-15FS4-7B 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 AP7315-15FS4-7B?
For technical support, including AP7315-15FS4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-15FS4-7B requirements.
6.How does Aetrix verify that AP7315-15FS4-7B is sourced from the original manufacturer or authorized distributors?
All AP7315-15FS4-7B 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 AP7315-15FS4-7B meets industry standards.
7.What is the process for return or replacement of AP7315-15FS4-7B?
All AP7315-15FS4-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-15FS4-7B, 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 AP7315-15FS4-7B part is unused and in its original packaging.
Return procedure for AP7315-15FS4-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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