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Diodes Incorporated AP7353D-285FS4-7
- Part No.:
- AP7353D-285FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7353D-285FS4-7.pdf
- Description:
- LDO CMOS LOWCURR X2-DFN1010-4 (T
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
AP7353D-285FS4-7 from Diodes Incorporated is a 250mA low-dropout linear regulator with fixed 2.85V output, high PSRR (90dB @ 1kHz), ultra-low output noise (10µVrms), and 18µA typical quiescent current. It features enable control, thermal shutdown, short-circuit protection, and is optimized for RF supply rails and battery-powered wearable systems using the X2-DFN1010-4 (Type B) package.
For engineers reviewing the AP7353D-285FS4-7 datasheet, AP7353D-285FS4-7 pinout, AP7353D-285FS4-7 application, or AP7353D-285FS4-7 equivalent, key selection criteria include dropout voltage at 250mA (73–152mV), EN logic thresholds (0.4V low / 1.2V high), discharge functionality, thermal resistance (237°C/W), and compatibility with 1µF ceramic output capacitors.
Technical Context
The AP7353D integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge path activated during shutdown. Its architecture delivers fast load transient response (<20µs recovery) and stable regulation across –40°C to +85°C ambient.
Unlike non-discharge variants (AP7353), the "D" suffix denotes an internal 35Ω NMOS discharge switch between OUT and GND when EN = 0V-enabling rapid output voltage decay critical for sequencing-sensitive subsystems like RF transceivers and camera modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±1% - ensures stable bias for 2.8V–2.9V logic rails and analog sensors without external feedback. |
| Max Output Current | 250mA - supports moderate-power peripherals including Wi-Fi/BT SoCs and image signal processors. |
| PSRR | 90dB @ 1kHz, 70dB @ 10kHz - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Output Noise | 10µVrms (10Hz–100kHz) - preserves SNR in RF front-end and high-resolution ADC reference paths. |
| Quiescent Current | 18µA typ. - extends battery life in always-on sensor nodes and wearable health monitors. |
| Dropout Voltage | 73–152mV @ 250mA - enables operation down to VIN = 2.923V while maintaining regulated 2.85V output. |
| Enable Thresholds | VEN(H) = 1.2V min., VEN(L) = 0.4V max. - compatible with 1.8V/3.3V GPIOs without level-shifting. |
| Thermal Resistance θJA | 237°C/W (X2-DFN1010-4) - requires minimal copper area for thermal management in space-constrained layouts. |
Pinout & Package
AP7353D-285FS4-7 uses the X2-DFN1010-4 (Type B) package: 1.0mm × 1.0mm, 0.65mm pitch, exposed thermal pad (EP). Recommended PCB layout uses ≥10mm² copper connected to GND under EP for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Power Input | Accepts 2.0V–5.5V; requires 1µF ceramic capacitor placed adjacent to minimize input impedance and ripple coupling. |
| 2: GND | Ground Reference | Primary return path for load current and internal circuits; must connect directly to low-impedance ground plane. |
| 3: EN | Enable Control | Active-high digital input; floating state disables regulator; 1.0µA max leakage avoids unintended wake-up. |
| 4: OUT | Regulated Output | Delivers 2.85V ±1%; includes internal discharge FET (35Ω) to rapidly drain output capacitance on shutdown. |
| EP | Exposed Thermal Pad | Not electrically functional as GND; soldered to PCB copper for thermal conduction-connect to GND for best performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 35Ω NMOS switch pulls OUT to GND when EN = 0V-eliminates need for external bleeder resistors in power sequencing. |
| Ultra-Low Noise Regulation | 10µVrms output noise enables clean supply for RF synthesizers and precision analog front-ends without additional filtering. |
| High PSRR at High Frequencies | 70dB rejection at 10kHz allows co-location with noisy DC/DC converters in compact portable designs. |
| Low Quiescent Current | 18µA typical IQ supports >1-year battery life in BLE beacons and environmental sensors operating at 10µA average load. |
| Stable with Small Ceramic Capacitors | Guaranteed stability with 0.7µF–10µF X7R/X5R output caps-reduces BOM count and board area vs. tantalum alternatives. |
| Robust Protection Suite | Includes thermal shutdown, short-circuit current limiting (~350mA), and absolute max ratings up to 6.0V on all pins. |
Applications
| Smartphone Camera Module | Wi-Fi 6/6E Transceiver Supply |
|---|---|
|
Use Scenario: Powering CIS (CMOS Image Sensor) analog and digital rails in multi-camera smartphone stacks. IC Role / Device Role / Timing Role: Low-noise 2.85V LDO supplying sensor analog core and PLL VCO bias, synchronized to frame capture timing. Use Value: 10µVrms noise prevents fixed-pattern noise in raw image data; fast load transient response (<20µs) maintains voltage during pixel readout bursts. |
Use Scenario: Providing clean 2.85V bias to RF power amplifier and mixer stages in dual-band Wi-Fi 6E client devices. IC Role / Device Role / Timing Role: Post-regulator for switched-mode power supply (SMPS) output, decoupling high-frequency switching noise before RF signal chain. Use Value: 90dB PSRR at 1kHz attenuates SMPS ripple; discharge function ensures controlled PA turn-off to prevent RF leakage during sleep mode. |
| Wearable ECG Sensor Node | Industrial IoT Edge Node |
|
Use Scenario: Regulating 2.85V for ultra-low-power analog front-end (AFE) and 24-bit delta-sigma ADC in chest-worn biosensors. IC Role / Device Role / Timing Role: Primary analog supply rail, enabled only during measurement windows to minimize system quiescent power. Use Value: 18µA IQ extends coin-cell battery life beyond 12 months; ±1% accuracy ensures consistent gain calibration across temperature. |
Use Scenario: Powering LoRaWAN or NB-IoT modem ICs in battery- or energy-harvesting–powered remote monitoring terminals. IC Role / Device Role / Timing Role: Standby supply enabling rapid wake-from-sleep transitions while maintaining precise voltage for crystal oscillator and RF synthesizer. Use Value: Fast 180µs turn-on time meets sub-10ms modem activation requirements; 2.0V–5.5V input range accommodates wide-voltage supercapacitor sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2802E/TO | 250mA, 2.8V fixed, 6µA IQ, no EN or discharge, TO-92 package | Lacks enable control and output discharge; unsuitable for sequenced power domains | Select when lowest quiescent current is primary requirement and board space permits through-hole mounting. |
| Torex XC6210B282MR-G | 200mA, 2.8V fixed, 1.0µA IQ, EN pin, no discharge, SOT-25 | Lower current rating and no discharge; higher PSRR (75dB @ 10kHz) but slower transient response | Prefer for ultra-low-power always-on sensors where 200mA headroom suffices and discharge is unnecessary. |
Compared with MCP1700-2802E/TO and XC6210B282MR-G, AP7353D-285FS4-7 uniquely combines 250mA capability, integrated discharge, 10µVrms noise, and DFN1010 packaging-making it optimal for space-constrained, sequenced, noise-sensitive RF and imaging applications.
Availability
AP7353D-285FS4-7 is available at Aetrix Electronics and suitable for smartphone camera modules, Wi-Fi 6E transceivers, and wearable ECG sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for AP7353D-285FS4-7 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 targets portable and wireless applications demanding ultra-low noise, high PSRR, and compact packaging-specifically addressing noise-sensitive RF, imaging, and battery-operated edge devices.
FAQ
What is the purpose of the exposed pad (EP) on AP7353D-285FS4-7?
The exposed pad is a thermal interface-not an electrical terminal. It must be soldered to a PCB copper area connected to GND to achieve the specified θJA of 237°C/W. Leaving it unconnected degrades thermal performance by >40%, risking thermal shutdown under 250mA continuous load.
Does AP7353D-285FS4-7 require an input capacitor?
Yes-a minimum 1µF X7R/X5R ceramic capacitor is required between IN and GND, placed within 2mm of the pins. This stabilizes input impedance during load transients and prevents oscillation caused by source inductance, especially when powered from a switching regulator or long PCB traces.
How does the discharge function operate during shutdown?
When EN is pulled low, the internal 35Ω NMOS switch connects OUT to GND, discharging output capacitance with a time constant of ~35µs per µF. This ensures rapid voltage decay-critical for preventing back-powering of upstream logic or violating reset timing in multi-rail systems.
Can AP7353D-285FS4-7 be used with ceramic capacitors smaller than 1µF?
Yes-the device is stable down to 0.7µF effective capacitance. However, derating must account for DC bias, temperature, and tolerance effects. For example, a 1µF X5R cap may drop to 0.65µF at 2.85V bias and 85°C; thus 1µF is recommended as the nominal value to guarantee margin.
AP7353D-285FS4-7 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):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.155V @ 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1010-4 (Type B)
AP7353D-285FS4-7 FAQ
1.How can I place an order for AP7353D-285FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7353D-285FS4-7 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-285FS4-7 reliable?
The price and inventory of AP7353D-285FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7353D-285FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7353D-285FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7353D-285FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7353D-285FS4-7?
AP7353D-285FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7353D-285FS4-7 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-285FS4-7?
For technical support, including AP7353D-285FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7353D-285FS4-7 requirements.
6.How does Aetrix verify that AP7353D-285FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7353D-285FS4-7 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-285FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7353D-285FS4-7?
All AP7353D-285FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7353D-285FS4-7, 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-285FS4-7 part is unused and in its original packaging.
Return procedure for AP7353D-285FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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