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Diodes Incorporated AP7315-32FS4-7B
- Part No.:
- AP7315-32FS4-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7315-32FS4-7B.pdf
- Description:
- IC REG LINEAR 3.2V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,723
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Product details
Overview
AP7315-32FS4-7B from Diodes Incorporated is a 3.2V 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 - designed for RF supply rails in compact portable electronics.
For engineers reviewing the AP7315-32FS4-7B datasheet, AP7315-32FS4-7B pinout, AP7315-32FS4-7B application, or AP7315-32FS4-7B equivalent, this page delivers verified electrical parameters, X2-DFN1010-4 package layout guidance, EN-controlled power sequencing behavior, and real-world use cases in RF and imaging subsystems.
Technical Context
The AP7315-32FS4-7B integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and enable input to deliver stable 3.2V output across 1.7V–5.25V input range. Its non-discharge architecture avoids output discharge during shutdown, preserving downstream bias conditions.
Designed for high-PSRR noise-sensitive loads, it achieves 75dB ripple rejection at 1kHz and maintains regulation down to 210mV dropout (at 150mA, VOUT = 3.2V), enabling operation from single-cell Li-ion or regulated 3.3V rails without compromising transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2V ±1% - ensures precise biasing for RF transceivers and image sensors requiring tight voltage tolerance. |
| Max Output Current | 150mA continuous - supports moderate-power analog/RF blocks without thermal derating in X2-DFN1010-4 package. |
| Input Voltage Range | 1.7V to 5.25V - compatible with single-cell Li-ion (2.7–4.2V), 3.3V logic rails, and USB-powered systems. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC-DC converters feeding adjacent digital circuits. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise impact on VCOs and ADC reference supplies. |
| Quiescent Current | 35µA typical - extends battery life in always-on RF receivers and sensor wake-up circuits. |
| Dropout Voltage | 210mV at 150mA - enables >93% efficiency at 3.2V output from 3.3V input rail. |
Pinout & Package
X2-DFN1010-4 is a 1.0mm × 1.0mm, 0.4mm pitch, 4-terminal leadless package with exposed thermal pad. PCB layout requires GND-connected copper pour under the thermal pad 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 minimize input impedance. |
| GND (Pin 2) | Ground reference | Primary return path for load current and regulator internal circuits; must connect to low-impedance ground plane. |
| EN (Pin 3) | Enable control | Logic-level input: ≥1.3V enables regulator; ≤0.5V disables it; floating state is prohibited. |
| VOUT (Pin 1) | Regulated output | Delivers 3.2V ±1%; requires 0.47µF ceramic capacitor near pin to ensure stability and transient response. |
| Thermal PAD | Thermal interface | Not electrically connected; must be soldered to GND copper area for thermal conduction - not used as functional GND node. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB at 1kHz - rejects noise from shared power rails in mixed-signal SoC designs. |
| Ultra-low noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in RF front-end and high-resolution ADC reference paths. |
| Low quiescent current | 35µA typical - enables >1-year battery life in low-duty-cycle IoT sensor nodes. |
| Wide input range | 1.7V–5.25V - supports direct connection to Li-ion cells, USB ports, and post-regulation 3.3V domains. |
| ±1% output accuracy | Guaranteed over -40°C to +85°C - eliminates need for external trimming in production calibration. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
|
Use Scenario: Provides clean, stable 3.2V bias to GaAs pHEMT power amplifiers in 2.4GHz Wi-Fi modules. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated VPA independent of baseband processor activity or DC-DC switching noise. Use Value: Reduces AM-to-PM distortion by maintaining constant PA gate voltage under dynamic load, improving EVM performance by >2dB. |
Use Scenario: Powers analog core and PLL circuits in 12MP mobile camera sensors operating in low-light mode. IC Role / Device Role / Timing Role: Precision 3.2V supply for sensor analog front-end and clock generation circuitry. Use Value: Limits temporal noise floor increase to <0.5 LSB RMS, preserving dynamic range in 12-bit ADC conversion. |
| Wireless Audio Codec Reference | BLE SoC I/O Domain Regulator |
|
Use Scenario: Supplies 3.2V reference voltage to stereo audio DACs in true wireless earbuds. IC Role / Device Role / Timing Role: Ultra-low-noise LDO isolating DAC reference from noisy digital supply domains. Use Value: Achieves THD+N < -102dB at 1kHz, meeting Hi-Res Audio certification requirements. |
Use Scenario: Regulates I/O voltage for Bluetooth 5.3 SoCs interfacing with touch controllers and environmental sensors. IC Role / Device Role / Timing Role: Enables 3.2V I/O compatibility while powered from 3.3V system rail or single-cell battery. Use Value: Eliminates level-shifting components and reduces BOM count by 3 parts per node in wearables. |
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 output, 250mA rating, 6µA quiescent current, SOT23-3 package | Lacks enable pin and has higher dropout (600mV @ 250mA); no EN control or thermal pad | Choose when ultra-low IQ dominates over EN functionality and board space allows larger dropout margin. |
| Torex XC6210B322MR-G | 3.2V output, 150mA, 25µA IQ, SOT25 package, built-in soft-start | Higher PSRR (80dB @ 1kHz) but larger footprint (2.9mm × 2.8mm vs. 1.0mm × 1.0mm) | Prefer when soft-start is required for inrush-sensitive loads and PCB area permits larger package. |
Compared with MCP1700-3302E/TO and XC6210B322MR-G, the AP7315-32FS4-7B uniquely balances ultra-small X2-DFN1010-4 footprint, EN control, and RF-grade PSRR/noise performance - making it optimal for space-constrained, noise-sensitive portable RF designs where both size and signal integrity are critical.
Availability
AP7315-32FS4-7B is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, wireless audio codec reference, and BLE SoC I/O domain regulation requiring stable component supply across high-mix consumer electronics production.
Supply support for AP7315-32FS4-7B 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 ICs 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-critical RF, imaging, and audio subsystems in portable and battery-powered devices.
FAQ
What is the minimum input voltage required for AP7315-32FS4-7B to regulate 3.2V output?
The AP7315-32FS4-7B requires a minimum input voltage of 1.7V, but to maintain regulation at full 150mA load, VIN must exceed VOUT by at least the dropout voltage - 210mV typical (3.41V min). At light loads (<1mA), regulation holds down to VIN = 3.21V.
Can the EN pin be left unconnected if enable functionality is not needed?
No - the EN pin must never be left floating. If enable control is unused, tie EN directly to VIN to ensure permanent activation. Floating EN may cause erratic startup, oscillation, or undefined output state due to internal leakage paths.
Is the thermal pad on the X2-DFN1010-4 package electrically connected to GND internally?
No - the thermal pad is not internally connected to any pin. It serves only for heat dissipation and must be soldered to a GND copper pour on the PCB for thermal performance, but must not be used as the sole GND connection for the device's electrical operation.
Does AP7315-32FS4-7B include short-circuit protection?
Yes - the device features fold-back current limiting that clamps output current to approximately 55mA when VOUT is shorted to GND, preventing thermal damage and enabling safe recovery after fault removal without latch-up or reset requirement.
AP7315-32FS4-7B 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):
- 3.2V
- 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:
- X2-DFN1010-4
AP7315-32FS4-7B FAQ
1.How can I place an order for AP7315-32FS4-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315-32FS4-7B 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 AP7315-32FS4-7B reliable?
The price and inventory of AP7315-32FS4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-32FS4-7B is usually 5 days.
3.What payment methods are accepted for AP7315-32FS4-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-32FS4-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315-32FS4-7B?
AP7315-32FS4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315-32FS4-7B 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 AP7315-32FS4-7B?
For technical support, including AP7315-32FS4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-32FS4-7B requirements.
6.How does Aetrix verify that AP7315-32FS4-7B is sourced from the original manufacturer or authorized distributors?
All AP7315-32FS4-7B 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 AP7315-32FS4-7B meets industry standards.
7.What is the process for return or replacement of AP7315-32FS4-7B?
All AP7315-32FS4-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-32FS4-7B, 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 AP7315-32FS4-7B part is unused and in its original packaging.
Return procedure for AP7315-32FS4-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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