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onsemi FAN2558MP10X
- Part No.:
- FAN2558MP10X
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
FAN2558MP10X.pdf
- Description:
- IC REG LINEAR 1V 180MA 6MLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,984
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Product details
Overview
FAN2558MP10X from onsemi is a fixed-output 1.0V, 180mA low-dropout linear regulator (LDO) in a 2×2mm 6-lead MLP package, featuring open-drain Power Good (PG) output, ±1% output voltage accuracy, and 100µA ground current at no load. It delivers stable power for processor core rails and memory I/O in portable electronics where low noise and fast enable response are critical.
For engineers reviewing the FAN2558MP10X datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (400mV @ 180mA), thermal shutdown (150°C), PSRR (50dB @ ≤100kHz), and compatibility with 0–300mΩ ESR output capacitors - all validated for battery-powered handheld systems operating from -40°C to +85°C.
Technical Context
The FAN2558MP10X uses BiCMOS process technology with a P-channel MOSFET pass element and trimmed bandgap reference to achieve ±1% initial output accuracy and excellent line/load regulation (<±0.3%/V and <±4%). Its control loop is optimized for stability with ceramic, tantalum, or electrolytic output capacitors ranging from 1µF to ≥4.7µF and ESR up to 300mΩ.
Power sequencing is supported via TTL-compatible EN input (VENH = 1.6V min, VENL = 0.4V max) and open-drain PG output with 95% VOUT threshold detection and 1–5ms delay. Internal current limiting (260–500mA) and thermal shutdown with 10°C hysteresis provide robust fault protection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0V ±1% - ensures precise core voltage for low-power microcontrollers and ASICs requiring tight tolerance. |
| Max Output Current | 180mA - sufficient for single-core processors, SRAM, or small FPGA I/O banks in space-constrained designs. |
| Dropout Voltage | 400mV @ 180mA - enables operation from 1.4V input (e.g., single Li-ion cell post-regulation) while maintaining regulation. |
| Ground Current | 100µA @ no load - minimizes quiescent power loss during standby, extending battery life in always-on subsystems. |
| PSRR | 50dB @ DC–100kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Power Good Delay | 1–5ms - provides reliable system reset timing after power-up, compatible with ARM Cortex-M boot sequences. |
| Thermal Shutdown | 150°C with 10°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 2×2mm 6-lead MLP (micro leadframe package) - ultra-compact footprint with exposed thermal pad for enhanced heat dissipation in high-density portable PCBs.
| 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 for transient immunity. |
| VOUT | Regulated Output | Delivers stable 1.0V; requires ≥1µF output capacitor with ESR ≤300mΩ for loop stability. |
| GND | Ground Reference | Primary return path for load current and internal bias; connects to local quiet ground plane. |
| EN | Enable Control Input | TTL-level active-high (≥1.6V); pulls down to ≤0.4V to enter shutdown mode (<0.1µA supply current). |
| PG | Power Good Indicator | Open-drain output pulled high externally (47kΩ recommended); asserts LOW when VOUT drops below 95% of 1.0V. |
| NC | No Connect | Pin 3 in MLP-6 package is unconnected - must remain floating or grounded per layout guidelines; not used in FAN2558MP10X. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ground current | 100µA at zero load - extends battery runtime in sleep modes without sacrificing startup speed. |
| Fast enable response | 30–300µs turn-on time - meets CDMA and LTE modem power sequencing requirements. |
| Wide ESR capacitor support | Stable with 0–300mΩ output capacitor ESR - eliminates need for expensive low-ESR ceramics in cost-sensitive designs. |
| Integrated active discharge | Internal ~100Ω resistor between VOUT and GND in shutdown - clears output charge rapidly for safe hot-swap or multi-rail sequencing. |
| High ripple rejection | 50dB PSRR up to 100kHz - maintains clean 1.0V rail despite noisy switcher inputs common in PMIC-based architectures. |
Applications
| Processor Core Power | Memory I/O Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-M0+/M3/M4 cores in wearables and IoT edge nodes requiring precise 1.0V supply under dynamic load. IC Role / Device Role / Timing Role: Primary voltage regulator delivering regulated 1.0V with ±1% accuracy and <4% load regulation across 0–180mA. Use Value: Enables deterministic CPU performance and low-power sleep states by eliminating voltage droop-induced clock instability. | Use Scenario: Supplying 1.0V to LPDDR2/LPDDR3 I/O buffers in smartphones and tablets where noise sensitivity impacts signal integrity. IC Role / Device Role / Timing Role: Low-noise LDO providing clean 1.0V rail with 50dB PSRR and 30µVRMS output noise (300Hz–50kHz). Use Value: Reduces bit error rates in high-speed memory interfaces by suppressing switching noise coupling from adjacent DC/DC converters. |
| PCMCIA Vcc Switching | PDAs & Feature Phones |
Use Scenario: Regulating and enabling Vcc (3.3V → 1.0V) for PCMCIA card slots in industrial handheld terminals with hot-plug capability. IC Role / Device Role / Timing Role: Fixed-output LDO with TTL-compatible EN and open-drain PG for sequenced power delivery and card presence detection. Use Value: Ensures safe card insertion/removal by coordinating EN assertion with host controller handshake and PG confirmation. | Use Scenario: Main logic rail in legacy PDAs and dual-mode GSM/CDMA feature phones operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 1.0V supply with fast enable (≤300µs) and thermal protection for burst-mode RF transmission. Use Value: Supports rapid wake-from-sleep transitions and prevents thermal runaway during extended voice calls or data sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/MB | 1.0V fixed, 250mA, SOT-23-5, 6µA quiescent current, no PG output | Lacks Power Good indicator and thermal shutdown hysteresis; lower IQ but no fault reporting | Choose when minimal quiescent current dominates over diagnostic capability and thermal robustness. |
| NCP1117ST10T3G | 1.0V fixed, 800mA, SOT-223, 6mA ground current, no EN or PG | Higher current and thermal mass, but lacks enable control and power-good signaling | Prefer for higher-current, non-battery applications where board space and diagnostics are secondary. |
Compared with MCP1700T-1002E/MB and NCP1117ST10T3G, the FAN2558MP10X uniquely combines 1.0V precision regulation, integrated PG monitoring, TTL-enable interface, and ultra-low 100µA ground current in a 2×2mm MLP - making it optimal for compact, battery-powered systems requiring both efficiency and system-level fault visibility.
Availability
FAN2558MP10X is available at Aetrix Electronics and suitable for portable electronics, processor power sequencing, and memory I/O regulation requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for FAN2558MP10X 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 electronics, delivering silicon and system-level solutions for automotive, industrial, cloud, and IoT markets.
The FAN2558MP10X belongs to the FAN2558 family of low-voltage CMOS LDOs designed specifically for battery-powered portable equipment requiring high accuracy, low noise, and fast enable response in ultra-small packages.
FAQ
What is the maximum input voltage rating for the FAN2558MP10X?
The FAN2558MP10X has an absolute maximum input voltage (VIN to GND) of 6V. However, its recommended operating range is 2.7V to 5.5V for 1.0V output. Exceeding 5.5V risks permanent damage even if within the 6V absolute limit, and operation above VIN = VOUT + VDROPOUT (i.e., >1.4V) is required to maintain regulation. Always observe derating guidelines per thermal conditions.
Does the FAN2558MP10X require an external bypass capacitor for noise reduction?
No - the FAN2558MP10X does not include a BYP pin and does not require an external bypass capacitor. Unlike the FAN2559 variant, the FAN2558MP10X is a fixed-output version without noise-bypass functionality. Its 30µVRMS output noise (300Hz–50kHz) is achieved through internal design and is specified with only COUT = 1µF and CBYPASS = 10nF (for test consistency), not as a required external component.
Can the FAN2558MP10X be used with ceramic output capacitors having zero ESR?
Yes - the FAN2558MP10X is explicitly characterized for stable operation with output capacitors having ESR from 0mΩ up to 300mΩ. Its control loop is optimized for ceramic capacitors, including X5R/X7R MLCCs with near-zero ESR. This eliminates the need for series resistors or specialized low-ESR tantalum types, simplifying BOM and reducing cost in high-volume portable designs.
What is the function of the NC pin on the FAN2558MP10X 2x2mm MLP package?
The NC (No Connect) pin on the FAN2558MP10X 2x2mm MLP package (Pin 3, top-view labeling) is internally unconnected and must remain floating or be tied to GND per PCB layout best practices. It is not functional in the FAN2558MP10X and differs from the ADJ or BYP pins found on other variants (e.g., FAN2558ADJ or FAN2559). Leaving it unconnected poses no risk, but grounding improves mechanical stability and EMI performance.
How does the Power Good (PG) output behave during thermal shutdown?
During thermal shutdown, the FAN2558MP10X disables its output stage, causing VOUT to collapse - which triggers the PG pin to assert LOW (≤0.1V) as soon as VOUT falls below 95% of 1.0V (i.e., <0.95V). The PG remains LOW throughout the shutdown event and only returns HIGH after VOUT recovers to ≥0.97V and remains stable for the 1–5ms PG delay window. This provides unambiguous fault indication to host controllers.
FAN2558MP10X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- 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):
- 1V
- 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:
- 6-DFN (2x2)
FAN2558MP10X FAQ
1.How can I place an order for FAN2558MP10X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN2558MP10X 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 FAN2558MP10X reliable?
The price and inventory of FAN2558MP10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN2558MP10X is usually 5 days.
3.What payment methods are accepted for FAN2558MP10X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN2558MP10X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN2558MP10X?
FAN2558MP10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN2558MP10X 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 FAN2558MP10X?
For technical support, including FAN2558MP10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN2558MP10X requirements.
6.How does Aetrix verify that FAN2558MP10X is sourced from the original manufacturer or authorized distributors?
All FAN2558MP10X 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 FAN2558MP10X meets industry standards.
7.What is the process for return or replacement of FAN2558MP10X?
All FAN2558MP10X units undergo pre-shipment inspection (PSI). If there is an issue with FAN2558MP10X, 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 FAN2558MP10X part is unused and in its original packaging.
Return procedure for FAN2558MP10X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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