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onsemi FAN2558S13X
- Part No.:
- FAN2558S13X
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
FAN2558S13X.pdf
- Description:
- IC REG LINEAR 1.3V 180MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,928
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Product details
Overview
FAN2558S13X from onsemi is a fixed-output 1.3V, 180mA low-dropout linear regulator (LDO) in a 5-lead SOT-23 package, featuring power-good indication, 1% output voltage accuracy, and ultra-low ground current (100µA). It delivers stable core voltage for baseband processors in CDMA handsets and enables precise power-up sequencing in portable electronics.
For engineers reviewing the FAN2558S13X datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (400mV at 180mA), PSRR (50dB @ DC–100kHz), thermal shutdown (150°C), fast enable response (30–300µs), and compatibility with 0–300mΩ ESR output capacitors.
Technical Context
The FAN2558S13X uses BiCMOS technology with a P-channel MOSFET pass element and trimmed bandgap reference to achieve 1% initial output accuracy and excellent line/load regulation. Its control loop supports wide ESR capacitor ranges without external compensation.
It integrates open-drain Power Good (PG) with 1–5ms delay, TTL-compatible Enable input (VENH ≥ 1.6V, VENL ≤ 0.4V), active output discharge via internal 100Ω resistor, and dual protection: current limit (260–500mA) and thermal shutdown with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.3V ±1% - ensures stable core supply for low-voltage ASICs and RF ICs |
| Max Output Current | 180mA - sufficient for baseband processor I/O and memory subsystems |
| Dropout Voltage | 400mV @ 180mA - enables operation from 1.7V input when powering 1.3V rails |
| Ground Current | 100µA @ no load - minimizes quiescent power in battery-backed standby modes |
| PSRR | 50dB @ DC–100kHz - suppresses switching noise from upstream DC/DC converters |
| Power Good Threshold | 89% VOUT ON / 97% VOUT OFF - provides reliable reset signaling during brownout recovery |
| Enable Response Time | 30–300µs - meets fast wake-up timing requirements in CDMA sleep/wake cycles |
| Stable With ESR | 0–300mΩ - allows use of low-cost ceramic or polymer capacitors without stability risk |
Pinout & Package
Package: 5-Lead SOT-23 (SC-74A), 2.7mm × 1.6mm footprint, 1.1mm height, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 2.7–5.5V input; must be decoupled with ≥2.2µF capacitor near pin |
| GND | Ground Reference | Primary return path for load current and internal bias; connects to local quiet ground plane |
| EN | Enable Control Input | TTL-compatible; high ≥1.6V enables regulator, low ≤0.4V shuts down output and reduces IQ to 0.1µA |
| PG | Open-Drain Power Good | Asserts low when VOUT drops below 89% of 1.3V; requires external 47kΩ pull-up for logic-level interface |
| VOUT | Regulated Output | Delivers 1.3V ±1% to load; requires ≥1µF ceramic output capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.3V Output | Factory-trimmed bandgap reference eliminates external feedback resistors and layout sensitivity |
| Power Good Indicator | Open-drain PG pin enables system-level power sequencing and fault monitoring without additional logic |
| Ultra-Low Ground Current | 100µA typical at no load - extends battery life in always-on mobile standby states |
| Fast Enable Response | 30–300µs turn-on time - satisfies CDMA burst-mode timing constraints for rapid RF activation |
| ESR-Tolerant Stability | Operates stably with 0–300mΩ output capacitor ESR - simplifies BOM by supporting ceramic, tantalum, or polymer types |
| Active Output Discharge | Internal 100Ω discharge path clears VOUT within milliseconds after shutdown - prevents floating rail issues in multi-rail systems |
Applications
| Processor Power-up Sequencing | PDAs and Cell Phones |
|---|---|
Use Scenario: Coordinating voltage ramp-up order between CPU core, I/O, and memory rails during cold start. IC Role / Device Role / Timing Role: Primary 1.3V core LDO with synchronized PG signal to gate downstream regulators. Use Value: Ensures deterministic boot sequence and avoids latch-up by enforcing strict voltage monotonicity per JEDEC JEP127. | Use Scenario: Supplying 1.3V to baseband processor in dual-mode CDMA/GSM handset. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO delivering regulated core voltage during RF transmit bursts. Use Value: Maintains 1.3V ±13mV under 150mA dynamic load steps, preventing digital logic errors during high-current TX events. |
| Portable Electronic Equipment | PCMCIA Vcc/Vpp Regulation |
Use Scenario: Providing clean 1.3V supply to Bluetooth/Wi-Fi SoC in handheld medical monitor. IC Role / Device Role / Timing Role: Primary LDO with PG confirmation before enabling wireless transceiver firmware. Use Value: 50dB PSRR rejects noise from shared battery rail, ensuring <30µVRMS output noise for sensitive analog front-end operation. | Use Scenario: Regulating PCMCIA card slot Vcc (3.3V) and Vpp (12V) auxiliary supplies in industrial data logger. IC Role / Device Role / Timing Role: Secondary 1.3V LDO powering PCMCIA controller logic and interface buffers. Use Value: 180mA current capability and 400mV dropout support operation from partially discharged Li-ion (≥2.7V), extending field deployment time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1302E/TT | 1.3V fixed, 250mA, 6µA IQ, SOT-23-5 - lower quiescent current but no PG output | Lacks power-good signaling; unsuitable for sequenced multi-rail systems requiring reset coordination | Select when ultra-low IQ dominates over system-level fault detection needs |
| NCP1117ST13T3G | 1.3V fixed, 800mA, 10mV dropout, SOT-223 - higher current, larger package, no EN/PG | No enable or PG pins; requires external circuitry for sequencing or shutdown control | Select when higher load current and thermal margin are critical, and board space permits SOT-223 |
Compared with MCP1700T-1302E/TT and NCP1117ST13T3G, the FAN2558S13X uniquely balances 180mA delivery, integrated PG signaling, fast enable, and 100µA ground current in the compact SOT-23-5 footprint-making it optimal for space-constrained, multi-rail portable designs requiring deterministic power management.
Availability
FAN2558S13X is available at Aetrix Electronics and suitable for portable electronics, CDMA baseband power, and processor sequencing applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for FAN2558S13X 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
onsemi (formerly Fairchild Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The FAN2558S13X belongs to the FAN2558 family of low-voltage CMOS LDOs, designed specifically for battery-powered portable devices requiring precision voltage regulation, fast transient response, and integrated power-good monitoring.
FAQ
What is the output voltage tolerance and temperature drift of the FAN2558S13X?
The FAN2558S13X guarantees ±1% output voltage accuracy over load, line, and temperature (−40°C to +85°C), with typical drift less than ±0.3% across that range. This is achieved via factory-trimmed bandgap reference and BiCMOS error amplifier design, ensuring stable 1.3V delivery for sensitive digital loads without external calibration.
Does the FAN2558S13X require an external bypass capacitor?
No-the FAN2558S13X does not require a bypass capacitor. Unlike the FAN2559 variant, the FAN2558S13X lacks a BYP pin; its noise performance relies on internal design and the 1µF output capacitor. The datasheet confirms bypass functionality is exclusive to FAN2559 and adjustable FAN2558ADJ variants.
Can the FAN2558S13X be used with ceramic output capacitors having zero ESR?
Yes-the FAN2558S13X is explicitly characterized for stable operation with output capacitors having ESR from 0mΩ up to 300mΩ. Its control loop architecture eliminates need for minimum ESR, allowing direct use of low-ESR multilayer ceramic capacitors without series resistance or stability concerns.
What is the maximum input voltage rating for the FAN2558S13X?
The absolute maximum input voltage (VIN to GND) for the FAN2558S13X is 6V. However, the recommended operating range is 2.7V to 5.5V for 1.3V output. Exceeding 5.5V risks violating thermal limits due to increased power dissipation, especially at full 180mA load.
How does the Power Good (PG) pin behave during thermal shutdown?
During thermal shutdown, the FAN2558S13X asserts PG low-identical to behavior during undervoltage or overload faults. The PG pin remains low until junction temperature falls ~10°C below 150°C threshold and VOUT recovers to ≥89% of 1.3V, ensuring system-level fault visibility regardless of failure cause.
FAN2558S13X 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 180mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 50dB (100kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
FAN2558S13X FAQ
1.How can I place an order for FAN2558S13X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN2558S13X 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 FAN2558S13X reliable?
The price and inventory of FAN2558S13X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN2558S13X is usually 5 days.
3.What payment methods are accepted for FAN2558S13X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN2558S13X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN2558S13X?
FAN2558S13X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN2558S13X 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 FAN2558S13X?
For technical support, including FAN2558S13X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN2558S13X requirements.
6.How does Aetrix verify that FAN2558S13X is sourced from the original manufacturer or authorized distributors?
All FAN2558S13X 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 FAN2558S13X meets industry standards.
7.What is the process for return or replacement of FAN2558S13X?
All FAN2558S13X units undergo pre-shipment inspection (PSI). If there is an issue with FAN2558S13X, 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 FAN2558S13X part is unused and in its original packaging.
Return procedure for FAN2558S13X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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