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Diodes Incorporated AP7315D-30FS4-7B
- Part No.:
- AP7315D-30FS4-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7315D-30FS4-7B.pdf
- Description:
- IC REG LINEAR 3V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,420
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Product details
Overview
AP7315D-30FS4-7B from Diodes Incorporated is a 3.0V fixed-output, 150mA low-dropout linear regulator with integrated discharge function, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and delivers stable power to RF supply rails in portable wireless devices.
For engineers reviewing the AP7315D-30FS4-7B datasheet, AP7315D-30FS4-7B pinout, AP7315D-30FS4-7B application, or AP7315D-30FS4-7B equivalent, key selection criteria include enable-controlled shutdown, ultra-low quiescent current (35µA typ), thermal performance in X2-DFN1010-4, and discharge capability for fast VOUT decay during disable.
Technical Context
The AP7315D-30FS4-7B integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge NMOS (30Ω typical) tied to the EN pin. Its architecture enables fast transient response and stable operation with only 0.47µF ceramic input/output capacitors.
It supports full enable control: EN ≥1.3V enables regulation; EN ≤0.5V disables output and activates internal discharge path from VOUT to GND. Dropout voltage is 210mV max at 150mA for VOUT = 3.0V, enabling efficient operation in battery-powered systems with tight VIN margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1% - ensures precise biasing for 3.0V logic, RF ICs, and sensor interfaces without external feedback. |
| Max Output Current | 150mA - sufficient for powering baseband processors, Wi-Fi/BT transceivers, or camera modules in compact handheld designs. |
| PSRR | 75dB at 1kHz - suppresses switching noise from PMICs or DC-DC converters feeding the LDO input, critical for RF supply integrity. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise in local oscillators and jitter in high-speed serial links. |
| Quiescent Current | 35µA typical - extends battery life in always-on subsystems such as Bluetooth LE receivers or wake-on-RF circuits. |
| Dropout Voltage | 210mV max at 150mA - allows operation down to VIN = 3.21V, supporting single-cell Li-ion (3.0–4.2V) and Li-polymer applications. |
| Enable Threshold | VEN(H) = 1.3V min, VEN(L) = 0.5V max - compatible with 1.8V/3.3V GPIOs and supports direct microcontroller control without level-shifting. |
| Discharge Resistance | 30Ω typical - discharges 10µF load in <330µs (τ = R×C), preventing residual voltage from interfering with system reset sequencing. |
Pinout & Package
AP7315D-30FS4-7B uses the X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm pitch) package with wettable flank terminations for automated optical inspection. Thermal pad is exposed on bottom and must be connected to PCB ground plane for optimal thermal dissipation (θJA ≈ 220°C/W on JEDEC High-K board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 4) | 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 2) | Ground reference | Primary return path for input/output current; must connect directly to thermal pad and system ground plane to reduce noise coupling. |
| EN (Pin 3) | Enable control input | CMOS-compatible digital input; drives regulator ON/OFF and activates internal discharge NMOS when pulled low. |
| VOUT (Pin 1) | Regulated output | Delivers 3.0V ±1% to load; output capacitor (0.47µF ceramic) must be placed within 2mm of VOUT/GND pins for stability. |
| Thermal Pad | Thermal conduction path | Not electrically functional; soldered to large copper area tied to GND for thermal management-no electrical connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | 30Ω internal NMOS discharges VOUT to GND upon disable-eliminates need for external bleed resistor and ensures clean power-down sequencing. |
| Ultra-Low Noise | 60µVrms (10Hz–100kHz) enables use in noise-sensitive analog/RF blocks without additional filtering stages. |
| High PSRR at Low Frequencies | 75dB at 1kHz maintains clean 3.0V rail even when powered from noisy buck converter outputs (e.g., 1MHz switching with 1kHz ripple). |
| Low Quiescent Current | 35µA typical at no load-reduces standby power loss by >90% vs. legacy LDOs, critical for multi-week battery life in IoT sensors. |
| Wide Input Range | 1.7–5.25V input supports direct connection to single-cell Li-ion, USB VBUS, or intermediate 3.3V/5V rails without pre-regulation. |
| Small Footprint | X2-DFN1010-4 (1.0mm × 1.0mm) saves >65% board area vs. SOT23-3, enabling dense layouts in smartphones and wearables. |
Applications
| RF Power Amplifier Bias | Wi-Fi/Bluetooth Baseband Core |
|---|---|
|
Use Scenario: Providing clean 3.0V bias to GaAs pHEMT power amplifiers in 2.4GHz/5GHz WLAN modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering stable VCC_PA independent of noisy DC-DC switching activity. Use Value: Reduces AM-to-PM distortion and improves EVM by suppressing 1–100kHz supply-induced phase noise. |
Use Scenario: Powering the core logic and PLL circuits of dual-band Wi-Fi SoCs operating at 3.0V. IC Role / Device Role / Timing Role: Primary 3.0V supply with enable control synchronized to MAC-layer sleep/wake cycles. Use Value: Enables rapid power gating (discharge-assisted VOUT collapse) to meet IEEE 802.11ax TWT timing constraints. |
| Camera Sensor Analog Rail | Portable Media Player Audio Codec |
|
Use Scenario: Supplying analog front-end (AFE) and image signal processor (ISP) analog supplies in smartphone rear cameras. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for CIS analog blocks requiring <100µVrms ripple. Use Value: Prevents fixed-pattern noise (FPN) and color shading artifacts caused by supply-induced pixel gain variation. |
Use Scenario: Powering DAC/ADC sections and headphone drivers in portable media players with 3.0V audio subsystems. IC Role / Device Role / Timing Role: Low-ripple, low-quiescent LDO decoupling audio codec from shared system rail. Use Value: Achieves >105dB SNR by eliminating switching noise coupling into sensitive analog audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.0V, 150mA LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3002E/MB | No discharge function; 2.0µA IQ; 600mV dropout at 250mA; SOT23-3 package | Lacks active discharge-requires external resistor for VOUT decay; higher dropout limits use in low-VIN battery apps | Select when ultra-low IQ dominates over fast shutdown and footprint is not constrained. |
| Torex XC6210B302MR-G | Discharge enabled; 1.0µA IQ; 250mV dropout at 100mA; SOT25-5 package with NC pin | Lower IQ but larger SOT25 footprint; NC pin adds routing complexity vs. 4-pin DFN | Select when sub-µA standby is mandatory and board space permits SOT25 layout. |
Compared with MCP1700-3002E/MB and XC6210B302MR-G, AP7315D-30FS4-7B uniquely balances discharge functionality, 35µA IQ, 210mV dropout, and 1.0mm² footprint-making it optimal for space-constrained, fast-wake-up portable RF systems.
Availability
AP7315D-30FS4-7B is available at Aetrix Electronics and suitable for RF power amplifier bias, Wi-Fi baseband core supply, camera sensor analog rail, and portable media player audio codec applications requiring stable component supply across high-mix production runs.
Supply support for AP7315D-30FS4-7B 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 solutions for power management, signal integrity, and connectivity applications.
The AP7315 series belongs to Diodes' high-performance LDO portfolio, designed specifically for noise-sensitive, battery-powered portable electronics where small size, low IQ, and fast enable/disable response are critical.
FAQ
What is the purpose of the thermal pad on the AP7315D-30FS4-7B?
The exposed thermal pad on the X2-DFN1010-4 package is a non-electrical thermal conduction path. It must be soldered to a PCB copper area connected to GND (or left floating) to dissipate heat-improving thermal resistance by up to 40% versus pad omission. It is not a functional ground terminal and carries no current.
Does AP7315D-30FS4-7B require an external discharge resistor?
No. The "D" suffix denotes integrated discharge functionality: when EN is pulled low, an internal 30Ω NMOS connects VOUT to GND, actively discharging output capacitance. This eliminates the need for external bleed resistors and ensures predictable, rapid VOUT decay (<330µs for 10µF).
Can AP7315D-30FS4-7B operate with a 0.47µF ceramic output capacitor only?
Yes. The device is internally compensated and stable with 0.47µF ±20% X5R/X7R ceramic capacitors (ESR <10mΩ). Larger bulk capacitors (e.g., 10µF tantalum) may be added in parallel for high-dV/dt loads, but are not required for basic stability per datasheet validation.
How does the AP7315D-30FS4-7B behave during input undervoltage?
When VIN drops below the minimum operating voltage (1.7V), the LDO enters dropout and VOUT tracks VIN minus dropout voltage. Below ~1.4V, the internal reference shuts down and EN becomes ineffective-output collapses passively. No reverse-current blocking is provided; external Schottky diode is recommended if backfeed risk exists.
AP7315D-30FS4-7B 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):
- 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:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1010-4
AP7315D-30FS4-7B FAQ
1.How can I place an order for AP7315D-30FS4-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315D-30FS4-7B 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 AP7315D-30FS4-7B reliable?
The price and inventory of AP7315D-30FS4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315D-30FS4-7B is usually 5 days.
3.What payment methods are accepted for AP7315D-30FS4-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-30FS4-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315D-30FS4-7B?
AP7315D-30FS4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315D-30FS4-7B 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 AP7315D-30FS4-7B?
For technical support, including AP7315D-30FS4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-30FS4-7B requirements.
6.How does Aetrix verify that AP7315D-30FS4-7B is sourced from the original manufacturer or authorized distributors?
All AP7315D-30FS4-7B 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 AP7315D-30FS4-7B meets industry standards.
7.What is the process for return or replacement of AP7315D-30FS4-7B?
All AP7315D-30FS4-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-30FS4-7B, 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 AP7315D-30FS4-7B part is unused and in its original packaging.
Return procedure for AP7315D-30FS4-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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