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Diodes Incorporated AP7315D-33W5-7
- Part No.:
- AP7315D-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7315D-33W5-7.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,466
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Product details
Overview
AP7315D-33W5-7 from Diodes Incorporated is a 3.3V fixed-output, 150mA low-dropout linear regulator with enable control, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and features ultra-low 35µA quiescent current in active mode-designed for RF supply rails in portable wireless communication devices.
For engineers reviewing the AP7315D-33W5-7 datasheet, AP7315D-33W5-7 pinout, AP7315D-33W5-7 application, or AP7315D-33W5-7 equivalent, this page delivers verified electrical specs, SOT25 package layout guidance, real-world load transient behavior, and validated alternatives for low-noise, high-PSRR LDO selection in space-constrained battery-powered systems.
Technical Context
The AP7315D-33W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge path (enabled when EN = low) to rapidly pull VOUT to GND during shutdown-critical for sequencing-sensitive RF and camera modules. Its internal architecture eliminates need for external discharge resistors.
It achieves stable regulation with only 0.47µF ceramic input and output capacitors, supports fast load-step response (≤100µs settling), and maintains ±30ppm/°C output voltage drift across –40°C to +85°C ambient-enabling reliable operation in handheld consumer electronics without thermal derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at 25°C - ensures compatibility with 3.3V I/O domains of baseband processors and RF transceivers. |
| Max Output Current | 150mA continuous - sufficient to power single-band RF front-end ICs or image sensor bias circuits. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC-DC converters feeding the same system rail. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in analog RF receive paths and ADC reference supplies. |
| Quiescent Current | 35µA typical - extends battery life in always-on sensor or standby-mode wireless adapters. |
| Dropout Voltage | 210mV at 150mA (VIN ≥ 4.3V) - enables operation from single-cell Li-ion (3.0–4.2V) with margin for voltage sag. |
| Enable Threshold | VEN(H) ≥ 1.3V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs for precise power sequencing control. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) package with exposed thermal pad (pin 5) connected to GND for enhanced thermal dissipation. Pin 4 is NC (not connected internally); recommended to tie to GND for PCB copper area maximization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VIN) | Input Power Supply | Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed adjacent to minimize input impedance and ripple coupling. |
| Pin 2 (GND) | Ground Reference | Primary return path for load current and regulator core; must connect directly to low-impedance ground plane. |
| Pin 3 (EN) | Enable Control Input | Active-high logic input; floating state is undefined-must be tied to VIN or controlled by host MCU GPIO. |
| Pin 4 (NC) | No Connect | Internally unconnected; recommended to route to GND for thermal relief and EMI shielding. |
| Pin 5 (VOUT) | Regulated Output | Delivers stable 3.3V; requires 0.47µF ceramic capacitor placed within 2mm of pin for optimal transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Discharge Path | 30Ω on-resistance (VEN = 0V) actively pulls VOUT to GND in <100µs-eliminates need for external bleed resistor in power-down sequencing. |
| Ultra-Low Noise | 60µVrms broadband noise enables direct use in RF receiver LNA bias and high-resolution ADC reference supplies. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz mitigates noise from PMIC switching regulators operating at ~1MHz with sub-harmonics. |
| Wide Input Range | 1.7–5.25V operation supports direct connection to Li-ion, Li-polymer, or regulated 3.3V/5V system rails without pre-regulation. |
| Thermal Protection | Internal foldback current limit (55mA short-circuit) and thermal shutdown prevent damage during sustained overload or poor PCB heatsinking. |
Applications
| RF Power Amplifier Bias | Camera Module Core Supply |
|---|---|
|
Use Scenario: Powers the drain bias of 2.4GHz Wi-Fi PA in compact IoT gateway modules where board space is constrained and thermal mass is minimal. IC Role / Device Role / Timing Role: Provides clean, sequenced 3.3V bias with fast turn-on/off via EN pin to match PA enable timing and reduce standby leakage. Use Value: 60µVrms noise prevents AM-to-PM distortion in PA output; 35µA IQ extends battery runtime in always-listening edge nodes. |
Use Scenario: Supplies core logic and analog blocks of 5MP CMOS image sensors in smartphone front cameras requiring rapid power cycling between capture bursts. IC Role / Device Role / Timing Role: Delivers stable 3.3V with <100µs transient recovery after 100mA load step-matching sensor frame-rate timing constraints. Use Value: Integrated discharge path clears VOUT in <50µs post-shutdown, preventing ghost exposure in next frame and eliminating external RC network. |
| Wireless Adapter SoC I/O Rail | Portable Media Player Audio Codec Supply |
|
Use Scenario: Regulates 3.3V I/O supply for Bluetooth 5.0 SoC in USB-C dongles where EMI from host port switching must not corrupt digital interface signals. IC Role / Device Role / Timing Role: Acts as local point-of-load regulator decoupling SoC from noisy USB 5V bus; EN pin synchronized to host enumeration sequence. Use Value: 75dB PSRR at 1kHz rejects USB switcher ripple; ±1% accuracy ensures reliable SDIO and UART level compatibility. |
Use Scenario: Powers stereo audio DAC and headphone amplifier in flash-based MP3 players using single-cell lithium battery (3.0–4.2V). IC Role / Device Role / Timing Role: Maintains 3.3V output across full battery discharge curve with dropout as low as 210mV at 150mA-maximizing usable capacity. Use Value: Low 35µA quiescent current extends playback time by >8% versus standard LDOs; 60µVrms noise avoids audible hiss in 24-bit audio path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.3V, 150mA LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | No enable pin; 2µA IQ; 65dB PSRR at 1kHz; no discharge function | Better for ultra-low-power always-on sensors but lacks sequencing control and fast shutdown | Select when EN and discharge are unnecessary and IQ < 5µA is mandatory |
| Torex XC6210B332MR-G | 300mA output; 25µA IQ; 70dB PSRR at 1kHz; SOT25 pinout identical but EN threshold differs (1.0V vs 1.3V) | Higher current headroom for future design scaling; slightly lower noise rejection at critical 1kHz band | Select when 300mA margin is needed or tighter EN logic compatibility with 1.0V GPIOs is required |
Compared with MCP1700T-3302E/MB, AP7315D-33W5-7 adds essential enable and discharge functions for modern wireless sequencing, while outperforming XC6210B332MR-G in PSRR at 1kHz-making it optimal for RF-sensitive 3.3V rails where noise injection must be minimized at fundamental switching frequencies.
Availability
AP7315D-33W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera module core supply, wireless adapter SoC I/O rail, and portable media player audio codec supply requiring stable component supply across production lifecycles.
Supply support for AP7315D-33W5-7 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-performance LDO portfolio, engineered specifically for low-noise, high-PSRR power delivery in portable wireless and imaging systems where battery efficiency and signal purity are critical.
FAQ
What is the purpose of the NC pin (Pin 4) in the SOT25 package?
Pin 4 is internally not connected and serves no electrical function. Diodes Incorporated recommends connecting it to GND on the PCB to maximize copper area for thermal conduction and improve EMI shielding-this does not affect regulation but enhances thermal performance and noise immunity in dense layouts.
Does the AP7315D-33W5-7 require an external discharge resistor?
No. The "D" suffix denotes integrated discharge functionality: when EN is pulled low, an internal 30Ω NMOS switch connects VOUT to GND, discharging output capacitance in under 100µs. This eliminates the need for external bleed resistors and simplifies power sequencing in multi-rail systems.
Can the AP7315D-33W5-7 operate from a 3.0V input while delivering 150mA at 3.3V output?
No. With a 3.0V input, the minimum dropout voltage (210mV at 150mA) exceeds the available headroom (3.0V − 3.3V = −0.3V). Stable operation requires VIN ≥ VOUT + dropout ≈ 3.51V at full load. For 3.0V input, use a 2.8V or 2.5V variant (e.g., AP7315D-28W5-7) instead.
How does the AP7315D-33W5-7 handle short-circuit conditions?
Under VOUT-to-GND short, the device activates foldback current limiting, clamping output current to approximately 55mA. Simultaneously, thermal shutdown engages if junction temperature exceeds 150°C. These protections prevent permanent damage and allow safe recovery once fault is removed-no latch-up occurs.
AP7315D-33W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7315D-33W5-7 FAQ
1.How can I place an order for AP7315D-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315D-33W5-7 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 AP7315D-33W5-7 reliable?
The price and inventory of AP7315D-33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315D-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7315D-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315D-33W5-7?
AP7315D-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315D-33W5-7 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 AP7315D-33W5-7?
For technical support, including AP7315D-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-33W5-7 requirements.
6.How does Aetrix verify that AP7315D-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7315D-33W5-7 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 AP7315D-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7315D-33W5-7?
All AP7315D-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-33W5-7, 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 AP7315D-33W5-7 part is unused and in its original packaging.
Return procedure for AP7315D-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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