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Diodes Incorporated AP7353D-25FS4-7
- Part No.:
- AP7353D-25FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7353D-25FS4-7.pdf
- Description:
- IC REG LIN 2.5V 250MA X2-DFN1010
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
AP7353D-25FS4-7 from Diodes Incorporated is a 250mA low-dropout linear regulator with fixed 2.5V output, ±1% accuracy, 90dB PSRR at 1kHz, 10µVrms output noise (10Hz–100kHz), and 18µA typical quiescent current. It features enable control, thermal shutdown, short-circuit protection, and integrated auto-discharge functionality. Designed for RF power supplies and portable media players requiring clean, stable bias under dynamic load.
For engineers reviewing the AP7353D-25FS4-7 datasheet, AP7353D-25FS4-7 pinout, AP7353D-25FS4-7 application, or AP7353D-25FS4-7 equivalent, key selection criteria include dropout voltage at 250mA (75mV typ. @ VOUT=2.5V), EN logic thresholds (0.4V low / 1.2V high), thermal resistance (237°C/W for X2-DFN1010-4), and discharge FET on-resistance (35Ω).
Technical Context
The AP7353D implements a CMOS-based LDO architecture with a precision voltage reference, error amplifier, current-limit circuit, and integrated N-channel discharge FET activated during shutdown. Its feedback loop is internally compensated for stability with ≥1µF ceramic output capacitors.
It operates across 2.0V–5.5V input range and delivers regulated 2.5V output with fast load transient response (20µs recovery) and line regulation of 0.02%/V. The discharge function actively pulls OUT to GND when EN = low, eliminating residual voltage hold-up in battery-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% - ensures precise biasing for 2.5V logic rails and analog sensors without external resistors. |
| Max Output Current | 250mA - supports moderate-power RF ICs and camera modules without thermal derating in DFN1010 package. |
| PSRR | 90dB @ 1kHz, 70dB @ 10kHz - suppresses switching noise from PMICs or DC-DC converters feeding the LDO input. |
| Output Noise | 10µVrms (10Hz–100kHz) - enables use in low-noise ADC references and RF synthesizer VCO supplies. |
| Quiescent Current | 18µA typ. - extends battery life in always-on wearable sensors and Bluetooth LE peripherals. |
| Dropout Voltage | 75mV typ. @ 250mA (VOUT=2.5V) - allows operation down to 2.575V input, critical for single-cell Li-ion (2.7–4.2V) systems. |
| Enable Thresholds | VEN(H) = 1.2V min., VEN(L) = 0.4V max. - compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
X2-DFN1010-4 (Type B) package: 1.0mm × 1.0mm footprint, 0.4mm pitch, exposed thermal pad (EP) for enhanced heat dissipation; RoHS-compliant NiPdAu-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Power Input | Accepts 2.0–5.5V supply; requires local 1µF ceramic decoupling capacitor placed adjacent to pin. |
| 2: GND | Ground Reference | Primary ground return path; must be connected to PCB ground plane with low-impedance trace. |
| 3: EN | Enable Control | Active-high digital input; floating state disables regulator; 1.2V threshold ensures compatibility with 1.8V I/O domains. |
| 4: OUT | Regulated Output | Delivers 2.5V ±1% at up to 250mA; connects to load and 1µF output capacitor with minimal trace length. |
| EP | Thermal Pad | Exposed copper pad beneath die; must be soldered to large GND copper area for θJA = 237°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Auto-Discharge | 35Ω on-resistance discharge FET actively sinks OUT to GND during shutdown, preventing voltage hold-up in multi-rail systems. |
| Ultra-Low Noise | 10µVrms output noise enables direct powering of RF VCOs and high-resolution SAR ADCs without additional filtering. |
| High PSRR at High Frequency | 70dB rejection at 10kHz maintains signal integrity against noise from nearby buck converters operating at 1–2MHz. |
| Fast Load Transient Response | 20µs recovery time for 1mA ↔ 250mA step ensures stable core voltage during burst-mode processor activity. |
| Low Quiescent Current | 18µA typ. draw in active mode reduces standby power loss in battery-backed real-time clocks and sensor nodes. |
Applications
| RF Power Supply | Portable Media Player |
|---|---|
|
Use Scenario: Biasing power amplifier stages and low-noise amplifiers in Bluetooth/Wi-Fi modules. IC Role / Device Role / Timing Role: Provides ultra-low-noise 2.5V rail isolated from noisy digital supply domains. Use Value: 90dB PSRR and 10µVrms noise prevent AM-to-PM distortion and EVM degradation in 2.4GHz transceivers. |
Use Scenario: Supplying audio DACs and display drivers in handheld video players. IC Role / Device Role / Timing Role: Delivers stable 2.5V reference for analog audio paths and gamma correction circuits. Use Value: ±1% output accuracy and 0.02%/V line regulation maintain consistent audio fidelity across battery discharge curve. |
| Smartphone Camera Module | Wearable Health Sensor |
|
Use Scenario: Powering image sensor analog front-end (AFE) and ISP core logic. IC Role / Device Role / Timing Role: Supplies clean 2.5V to CIS analog blocks while supporting rapid ON/OFF cycling via EN pin. Use Value: 180µs turn-on time and 250mA capability meet burst-capture timing requirements without voltage droop. |
Use Scenario: Providing regulated bias to optical heart-rate monitor (PPG) analog signal chain. IC Role / Device Role / Timing Role: Powers photodiode transimpedance amplifier and ADC reference in ultra-low-power mode. Use Value: 18µA quiescent current and auto-discharge minimize leakage during sleep cycles, extending 7-day battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361D-25FS4-7 | Higher output current (600mA), same 2.5V fixed output, identical package and EN/discharge functionality. | Better suited for systems with peak loads >250mA (e.g., multi-sensor fusion nodes), but larger dropout (95mV typ.) at full load. | Select when future-proofing for higher current or sharing layout with AP7361D-series designs. |
| MCP1703T-2502E/MB | 250mA, 2.5V fixed, no discharge FET, higher quiescent current (2.5µA typ. - note: typo in source; actual is 2.5µA standby, 4µA active), SOT-23-5 package. | Lacks auto-discharge; requires external pull-down for hold-up elimination; larger footprint and lower thermal performance (θJA ≈ 250°C/W). | Choose only if discharge is unnecessary and board space permits SOT-23; not recommended for battery hold-up–sensitive designs. |
Compared with AP7353D-25FS4-7, AP7361D-25FS4-7 offers headroom for current growth but trades off efficiency at light loads, while MCP1703T-2502E/MB sacrifices discharge capability and thermal performance for legacy package compatibility.
Availability
AP7353D-25FS4-7 is available at Aetrix Electronics and suitable for RF power supplies, portable media players, smartphone camera modules, and wearable health sensors requiring stable component supply, tight voltage tolerance, and low-noise regulation.
Supply support for AP7353D-25FS4-7 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 connectivity solutions for consumer, industrial, and automotive markets.
The AP7353 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable electronics where battery efficiency and signal purity are co-constrained design priorities.
FAQ
What is the minimum input voltage required for AP7353D-25FS4-7 to regulate 2.5V at 250mA?
The typical dropout voltage is 75mV at 250mA and 2.5V output, so the minimum input is 2.575V. The absolute minimum specified input is 2.0V, but regulation fails below VOUT + VDROP. At -40°C, dropout increases to 95mV, requiring ≥2.595V input for full-load regulation.
Does AP7353D-25FS4-7 require an external discharge resistor?
No. Unlike non-D variants, AP7353D integrates an N-channel discharge FET (35Ω typical on-resistance) that actively pulls the OUT pin to GND when EN is low. This eliminates need for external components and ensures rapid, controlled discharge of output capacitance.
Can AP7353D-25FS4-7 operate with only 0.5µF output capacitance?
No. The datasheet specifies a minimum effective capacitance of 0.7µF (accounting for temperature, DC bias, and tolerance derating) using X7R/X5R ceramics. Using 0.5µF risks instability, overshoot, and degraded transient response - especially under 250mA load steps.
How does the exposed pad (EP) affect thermal performance?
The EP must be soldered to a dedicated GND copper pour; omitting this connection raises θJA from 237°C/W to >300°C/W. For 250mA at 5.5V input, junction temperature rise exceeds 100°C without proper EP grounding - risking thermal shutdown or long-term reliability loss.
AP7353D-25FS4-7 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.168V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 27 µA
- Current - Supply (Max):
- -
- PSRR:
- 90dB ~ 70dB (100Hz ~ 10kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1010-4 (Type B)
AP7353D-25FS4-7 FAQ
1.How can I place an order for AP7353D-25FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7353D-25FS4-7 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 AP7353D-25FS4-7 reliable?
The price and inventory of AP7353D-25FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7353D-25FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7353D-25FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7353D-25FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7353D-25FS4-7?
AP7353D-25FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7353D-25FS4-7 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 AP7353D-25FS4-7?
For technical support, including AP7353D-25FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7353D-25FS4-7 requirements.
6.How does Aetrix verify that AP7353D-25FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7353D-25FS4-7 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 AP7353D-25FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7353D-25FS4-7?
All AP7353D-25FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7353D-25FS4-7, 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 AP7353D-25FS4-7 part is unused and in its original packaging.
Return procedure for AP7353D-25FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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