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Diodes Incorporated AP7368D-25RS4-7
- Part No.:
- AP7368D-25RS4-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Special Purpose Regulators
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7368D-25RS4-7.pdf
- Description:
- LDO CMOS HICURR X1-DFN1612-8 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:4,630
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Product details
Overview
AP7368D-25RS4-7 from Diodes Incorporated is a low-noise, RF-optimized 2.5V fixed-output LDO regulator delivering up to 1A output current (selectable via LCON pin), ±1% output voltage accuracy, 80dB PSRR at 1kHz, and 16µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.5V input and targets power-sensitive RF supply rails in portable wireless devices.
For engineers reviewing the AP7368D-25RS4-7 datasheet, AP7368D-25RS4-7 pinout, AP7368D-25RS4-7 application, or AP7368D-25RS4-7 equivalent, key selection criteria include its dual-current-limit configuration (500mA/1A), ultra-low quiescent current (110µA), thermal shutdown threshold (+150°C), and DFN1612-8 package compatibility with high-density RF PCB layouts.
Technical Context
The AP7368D-25RS4-7 integrates a CMOS-based error amplifier, precision voltage reference, and foldback short-circuit protection. Its LCON pin selects between 500mA (L) and 1A (H) current limits, enabling flexible system-level current budgeting without changing BOMs.
It features active output discharge (D-suffix), EN-controlled enable/disable with defined logic thresholds (VIL ≤ 0.4V, VIH ≥ 1V), and stable operation with 1µF ceramic input/output capacitors-critical for compact RF module designs where board space and EMI are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% over −40°C to +85°C - ensures stable bias for RF ICs requiring tight voltage tolerance. |
| Max Output Current | Selectable 500mA (LCON=L) or 1A (LCON=H) - supports both low-power standby and burst-mode transmit loads. |
| PSRR | 80dB at 1kHz (VOUT ≥ 1.8V) - suppresses switching noise from adjacent DC/DC converters in RF front-end power domains. |
| Output Noise | 16µVrms (10Hz–100kHz) - minimizes phase noise degradation in VCOs, LNAs, and PLLs. |
| Quiescent Current | 110µA typical - extends battery life in always-on RF receivers and IoT sensor nodes. |
| Dropout Voltage | 74mV at 1.8VOUT/500mA; 155mV at 2.5VOUT/1A - enables efficient operation from single-cell Li-ion or Li-poly batteries. |
| Thermal Shutdown | +150°C with +20°C hysteresis - provides robust overtemperature protection during sustained RF transmit bursts. |
Pinout & Package
X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm footprint, 0.4mm pitch, exposed thermal pad (EP) - optimized for minimal PCB area and enhanced thermal dissipation in space-constrained RF modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VOUT | Regulated output node | Dual-pin configuration reduces IR drop and improves current sharing for 1A operation. |
| 3 LCON | Current limit select input | Logic-high = 1A limit; logic-low = 500mA limit - enables dynamic load management without external components. |
| 4 VFB | Feedback reference point | Internally connected to fixed 2.5V divider - no external resistor network required for this variant. |
| 5 GND | Power ground reference | Primary return path for output current and internal circuitry; must be low-impedance to minimize noise coupling. |
| 6 EN | Enable control input | Active-high logic interface (VIH ≥ 1V); floating state prohibited - used for system-level power sequencing. |
| 7, 8 VDD | Input power supply | Dual-pin layout lowers input impedance and improves transient response under fast RF load steps. |
| EP | Exposed thermal pad | Must be connected to large copper pour tied to GND - critical for maintaining TJ < 125°C at 1A continuous load. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise RF regulation | 16µVrms output noise enables clean power for sensitive RF transceivers without additional filtering. |
| Configurable current limiting | LCON pin toggles between 500mA and 1A limits - simplifies design reuse across product variants with differing RF power classes. |
| Active output discharge | Internal N-channel MOSFET discharges VOUT when disabled - prevents residual voltage from interfering with downstream logic sequencing. |
| High PSRR at RF frequencies | 80dB rejection at 1kHz and >75dB down to 100Hz - mitigates noise coupling from baseband processors and PMICs into RF signal chains. |
| Ultra-low quiescent current | 110µA IQ - maintains efficiency during deep-sleep modes in Bluetooth LE and NB-IoT modems. |
Applications
| Smartphone RF Front-End | Wi-Fi 6/6E Transceiver Supply |
|---|---|
|
Use Scenario: Powering PA drivers and LNA stages in multi-band smartphone RF modules. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO supplying 2.5V to GaAs/GaN RF ICs during TDMA burst transmission. Use Value: 16µVrms noise and 80dB PSRR prevent AM-to-PM distortion and EVM degradation in 256-QAM signals. |
Use Scenario: Providing regulated 2.5V to Wi-Fi 6E transceivers operating in 6GHz band. IC Role / Device Role / Timing Role: Primary VDD_LDO for RF synthesizer and mixer blocks requiring sub-20µV noise floor. Use Value: 1A current capability supports concurrent 2.4GHz/5GHz/6GHz transmit paths without voltage droop-induced packet loss. |
| Bluetooth LE Audio Earbuds | UWB Precision Ranging Module |
|
Use Scenario: Biasing ultra-low-power Bluetooth audio SoCs in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Always-on 2.5V rail for DSP core and BLE radio during low-duty-cycle advertising/scanning. Use Value: 110µA quiescent current extends battery runtime beyond 24 hours per charge cycle. |
Use Scenario: Powering UWB transceivers (e.g., Apple U1, Decawave DW3000) in real-time location systems. IC Role / Device Role / Timing Role: Clean 2.5V supply for time-of-flight measurement circuits demanding picosecond timing stability. Use Value: ±1% output accuracy and <±30ppm/°C drift ensure consistent pulse-shape fidelity across −25°C to +70°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise RF LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B252MR-G | Fixed 2.5V, 500mA only, no LCON pin, 25µVrms noise, 70dB PSRR @ 1kHz | Lacks 1A mode and active discharge; suitable only for lower-current RF receivers | Choose if cost sensitivity outweighs need for burst-mode transmit support and ultra-low noise. |
| Richtek RT9080L-25PU5 | Fixed 2.5V, 1A, 20µVrms, 75dB PSRR @ 1kHz, no LCON pin, no active discharge | Higher noise and lower PSRR than AP7368; lacks current-limit flexibility and output discharge | Consider only when footprint compatibility with SOT-23-5 is mandatory and RF performance margin is relaxed. |
Compared with XC6210B252MR-G and RT9080L-25PU5, the AP7368D-25RS4-7 uniquely combines 1A/500mA configurability, 16µVrms noise, active discharge, and DFN1612-8 size-making it optimal for next-generation RF modules requiring both peak power headroom and deep-sleep efficiency.
Availability
AP7368D-25RS4-7 is available at Aetrix Electronics and suitable for smartphone RF front-ends, Wi-Fi 6E transceivers, and UWB ranging modules requiring stable component supply, controlled thermal behavior, and high-volume tape-and-reel logistics.
Supply support for AP7368D-25RS4-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7368 series belongs to Diodes' RF-optimized LDO product line, designed specifically to meet stringent noise, PSRR, and transient response requirements of modern wireless communication ICs-including 5G NR, Wi-Fi 6/6E, and UWB transceivers.
FAQ
What is the function of the LCON pin on AP7368D-25RS4-7?
The LCON pin configures the device's output current limit: logic-high (≥1V) sets 1A maximum output, while logic-low (≤0.4V) restricts it to 500mA. This allows a single BOM to serve multiple RF subsystems with different peak current demands-such as LNA-only vs. PA+LNA configurations-without redesigning the power stage.
Does AP7368D-25RS4-7 require external compensation components?
No. The AP7368D-25RS4-7 is internally compensated and stable with 1µF ceramic input and output capacitors. Its design eliminates the need for external RC networks or ESR-tuning resistors, reducing bill-of-materials count and PCB area-especially valuable in miniaturized RF modules where every mm² matters.
How does the active output discharge feature operate?
When the EN pin is pulled low, an internal N-channel MOSFET connects VOUT to GND, discharging the output capacitor within microseconds. This prevents residual voltage from holding downstream logic in undefined states during power-down sequences-critical for reliable wake-up behavior in Bluetooth LE and Zigbee SoCs.
Can AP7368D-25RS4-7 be used in automotive applications?
The standard AP7368D-25RS4-7 is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., AP7368Q-series) with PPAP support, IATF 16949 manufacturing, and extended temperature validation. For automotive use, contact Diodes directly or your authorized distributor for qualified part numbers and qualification reports.
AP7368D-25RS4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- LDO, Cameras, Wireless Devices
- Voltage - Input:
- 1.7V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 2.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1612-8 (Type B)
AP7368D-25RS4-7 FAQ
1.How can I place an order for AP7368D-25RS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7368D-25RS4-7 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 AP7368D-25RS4-7 reliable?
The price and inventory of AP7368D-25RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7368D-25RS4-7 is usually 5 days.
3.What payment methods are accepted for AP7368D-25RS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7368D-25RS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7368D-25RS4-7?
AP7368D-25RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7368D-25RS4-7 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 AP7368D-25RS4-7?
For technical support, including AP7368D-25RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7368D-25RS4-7 requirements.
6.How does Aetrix verify that AP7368D-25RS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7368D-25RS4-7 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 AP7368D-25RS4-7 meets industry standards.
7.What is the process for return or replacement of AP7368D-25RS4-7?
All AP7368D-25RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7368D-25RS4-7, 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 AP7368D-25RS4-7 part is unused and in its original packaging.
Return procedure for AP7368D-25RS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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