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onsemi FAN2502S30X
- Part No.:
- FAN2502S30X
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
FAN2502S30X.pdf
- Description:
- IC REG LINEAR 3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
FAN2502S30X from Fairchild Semiconductor is a 3.0 V fixed-output CMOS low-dropout (LDO) voltage regulator in SOT-23-5 package, delivering 150 mA output with 150 mV dropout at full load, 25 µA ground current at 150 mA, and enable/shutdown control-designed for power management in portable battery-powered systems such as cellular handsets and notebook computers.
For engineers reviewing the FAN2502S30X datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low quiescent current, thermal shutdown protection, bypass-capacitor–enabled noise reduction, compatibility with wide-ESR output capacitors, and precise 3.0 V ±2% output accuracy across temperature and load.
Technical Context
The FAN2502S30X employs a P-channel MOSFET series pass element with ~1 Ω on-resistance, enabling low dropout performance superior to bipolar LDOs. Its CMOS error amplifier features low input bias current and integrates a 1.32 V bandgap reference with ±6% accuracy over temperature.
Pin 4 is configured as BYP (bypass), supporting connection of a 470 pF capacitor to reduce output noise; loop stability is maintained across 10 mΩ–10 Ω ESR output capacitors, including ceramic, tantalum, and aluminum electrolytic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% over -40°C to +125°C junction temperature |
| Dropout Voltage | 150 mV at 150 mA load - enables regulation down to VIN = 3.15 V |
| Ground Current | 25 µA at 150 mA - minimizes battery drain in active operation |
| Shutdown Current | <1 µA when EN ≤ 0.4 V - supports deep sleep modes |
| PSRR | 43 dB at 120 Hz - suppresses input ripple in noisy supply environments |
| Output Noise | <7 µV/√Hz (10 Hz–1 kHz) with 10 µF COUT and 0.01 µF CBYP - critical for RF/analog subsystems |
| Thermal Shutdown | Triggers at 150°C junction temperature - prevents permanent damage during overload |
Pinout & Package
SOT-23-5 surface-mount package (EIAJ SC-74A), 1.6 mm × 2.9 mm footprint, 1.1 mm height, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power Input | Accepts 2.7 V–6.5 V input; requires ≥2.2 µF local ceramic decoupling |
| 2 - GND | Power Ground | Reference node for all internal circuitry; must connect to low-impedance local ground plane |
| 3 - EN | Digital Enable | Logic high (≥2.0 V) enables output; logic low (≤0.4 V) disables output to <1 µA |
| 4 - BYP | Bypass Terminal | High-impedance node for 470 pF–10 nF capacitor to filter reference noise and reduce output ripple |
| 5 - VOUT | Regulated Output | Delivers stable 3.0 V to load; requires ≥1 µF output capacitor for loop stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ground current | 25 µA at 150 mA - extends battery life in always-on portable devices |
| Wide capacitor compatibility | Stable with 1 µF–10 µF output capacitors having ESR from 10 mΩ to 10 Ω - eliminates capacitor qualification overhead |
| Low-noise bypass architecture | 470 pF capacitor on BYP pin reduces broadband output noise by >50% - suitable for ADCs and RF front-ends |
| Thermal limiting | Auto-shutdown at 150°C junction temperature with automatic recovery - protects against sustained overload without external circuitry |
| Enable-controlled shutdown | EN pin reduces total system current to sub-µA levels - enables precise power sequencing in multi-rail designs |
Applications
| Cellular Handset Power Rail | Laptop Subsystem Regulator |
|---|---|
Use Scenario: Supplies 3.0 V to baseband processor I/O or camera sensor interface in GSM/TDMA handsets. IC Role / Device Role / Timing Role: Primary low-noise, low-quiescent-current LDO providing clean 3.0 V rail independent of battery voltage sag. Use Value: Maintains 3.0 V ±2% accuracy while drawing only 25 µA ground current - directly extends talk time between charges. |
Use Scenario: Powers USB controller or touchpad ASIC in notebook computers during suspend/resume cycles. IC Role / Device Role / Timing Role: Standby-mode LDO activated via EN signal from EC (Embedded Controller) to manage peripheral power states. Use Value: Enables <1 µA shutdown current and fast 500 µs enable response - meets ACPI S3/S4 power budget requirements. |
| Portable Camera Sensor Supply | PDAs and Palmtop Memory Rail |
Use Scenario: Delivers low-noise 3.0 V to CMOS image sensor analog front-end and PLL clock generator. IC Role / Device Role / Timing Role: Noise-sensitive analog supply LDO with BYP pin decoupled to 470 pF capacitor. Use Value: Achieves <7 µV/√Hz integrated noise - prevents image artifacts and timing jitter in high-resolution capture. |
Use Scenario: Regulates 3.0 V for SRAM or flash memory interface in handheld PDAs with intermittent usage patterns. IC Role / Device Role / Timing Role: Load-switched LDO controlled by application processor GPIO to gate power to memory subsystem. Use Value: Combines 150 mV dropout and thermal protection - ensures reliable memory access even under hot, high-load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/TT | 300 mA output, 1.6 µA quiescent current, no BYP pin, 600 mV dropout at 250 mA | Lacks bypass-capacitor noise reduction; better for ultra-low-IQ standby but higher dropout limits minimum VIN | Choose for lower IQ where noise is non-critical and input headroom exceeds 0.6 V |
| TCS2113-3.0 | 200 mA output, 35 µA ground current, thermal shutdown, no EN pin, 200 mV dropout at 150 mA | No enable control; fixed 3.0 V output only; slightly higher dropout and ground current | Choose when board space prohibits EN routing and 200 mV dropout is acceptable |
Compared with MCP1700T-3002E/TT and TCS2113-3.0, the FAN2502S30X uniquely balances ultra-low ground current (25 µA), low dropout (150 mV), and integrated noise suppression via the BYP pin-making it optimal for noise-sensitive, battery-constrained portable applications requiring precise 3.0 V regulation.
Availability
FAN2502S30X is available at Aetrix Electronics and suitable for cellular handsets, portable cameras, and laptop subsystems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for FAN2502S30X 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
Fairchild Semiconductor was a U.S.-based analog and power IC manufacturer, acquired by ON Semiconductor in 2016; known for high-performance, cost-optimized power management solutions.
The FAN2502/03 family was designed specifically for compact, battery-powered portable electronics - emphasizing micropower operation, low dropout, thermal robustness, and ease of capacitor selection in space-constrained layouts.
FAQ
What is the maximum input voltage rating for the FAN2502S30X?
The FAN2502S30X has an absolute maximum input voltage of 7 V, with recommended operating range from 2.7 V to 6.5 V. Exceeding 7 V risks permanent damage per Absolute Maximum Ratings. The device maintains regulation down to VIN = VOUT + VDO (i.e., 3.15 V typical at 150 mA), making it suitable for single-cell Li-ion (2.7–4.2 V) and dual-cell alkaline inputs.
Does the FAN2502S30X require an external bypass capacitor on the BYP pin?
The FAN2502S30X does not require an external bypass capacitor on the BYP pin for basic regulation, but connecting a 470 pF capacitor significantly reduces output noise - especially critical in RF, audio, or high-resolution imaging applications. Omitting it increases broadband noise by up to 3×; high-leakage capacitors must be avoided to preserve output accuracy.
How does thermal shutdown behave in the FAN2502S30X during continuous overload?
When the FAN2502S30X junction temperature reaches 150°C, thermal protection disables the output until the die cools below the hysteresis threshold (~135°C), then automatically re-enables. During repeated cycling, asserting EN = low reduces power dissipation to <1 µA, preventing thermal oscillation and enabling safe fault recovery without manual intervention.
Can the FAN2502S30X be used with ceramic output capacitors?
Yes - the FAN2502S30X is explicitly designed for stable operation with ceramic output capacitors ranging from 1 µF to 10 µF, regardless of ESR (10 mΩ to 10 Ω). X7R or Y5V dielectrics are recommended for best temperature coefficient performance; no series resistor or ESR tuning is needed, simplifying layout and BOM.
What is the output voltage accuracy specification for the FAN2502S30X over temperature and load?
The FAN2502S30X guarantees ±2% output voltage accuracy over the full operating junction temperature range (-40°C to +125°C) and load current range (0.1 mA to 150 mA), as specified in the Electrical Characteristics table. This includes contributions from line regulation (0.3%/V), load regulation (1.0–2.0%), and initial tolerance - verified across production lots and process corners.
FAN2502S30X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.18V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- 43dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
FAN2502S30X FAQ
1.How can I place an order for FAN2502S30X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN2502S30X 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 FAN2502S30X reliable?
The price and inventory of FAN2502S30X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN2502S30X is usually 5 days.
3.What payment methods are accepted for FAN2502S30X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN2502S30X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN2502S30X?
FAN2502S30X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN2502S30X 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 FAN2502S30X?
For technical support, including FAN2502S30X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN2502S30X requirements.
6.How does Aetrix verify that FAN2502S30X is sourced from the original manufacturer or authorized distributors?
All FAN2502S30X 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 FAN2502S30X meets industry standards.
7.What is the process for return or replacement of FAN2502S30X?
All FAN2502S30X units undergo pre-shipment inspection (PSI). If there is an issue with FAN2502S30X, 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 FAN2502S30X part is unused and in its original packaging.
Return procedure for FAN2502S30X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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