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- **Features**:
- Ultra-wide input voltage range: 100V (4.5V–100V)
- Integrated high-side power MOSFET; peak switch current limit: 3.5A (typical)
- Hysteretic voltage-mode control; ultra-fast response; no external compensation required
- Switching frequency up to 1MHz; enables use of small external components
- PWM dimming control input available for LED applications
- Integrated Short-Circuit Protection (SCP)
- Low quiescent current: 170 µA
- Over-Temperature Protection (OTP)
- Automotive-grade operating temperature range: -40°C to +125°C
Technical Specifications
- **Input Voltage Range**: 4.5 V to 100 V (Recommended operating conditions: 4.5V–95V)
- **Output Voltage**: Fixed 5V (MP9486AGN-Z fixed output version) / Adjustable (MP9486A adjustable version)
- **Output Current**: 1 A (continuous output)
- **Peak Switch Current Limit**: 3.5 A (typical)
- **Switching Frequency**: Up to 1 MHz
- **Quiescent Current**: 170 µA
- **Control Topology**: Buck (step-down), hysteretic voltage-mode control
- **Synchronous Rectifier**: None (non-synchronous rectification)
- **Output Type**: Fixed (MP9486AGN-Z) / Adjustable
- **Number of Output Channels**: 1
- **Operating Temperature Range**: -40°C to +125°C (TJ)
- **Package Type**: SOIC-8 EP (8-SOIC, 0.154" / 3.90 mm wide, with exposed pad)
- **Mounting Style**: Surface Mount (SMD/SMT)
- **Packaging**: Tape & Reel (2,500 units/reel, -Z suffix)
- **RoHS Status**: Lead-free / RoHS compliant
- **Product Lifecycle**: Active (In mass production)
**Important Notes**
- **Compatibility**: Please verify compatibility with your application before purchase.
- Package Match: SOIC-8 EP (with exposed thermal pad); ensure the PCB footprint includes a connection for the thermal pad.
- Input Voltage: Ensure the supply voltage is within the 4.5V–100V range (recommended max: 95V).
- Output Voltage: The MP9486AGN-Z is a fixed 5V output version; select other MP9486A models if an adjustable output is required.
- Power Dissipation: Maximum allowable power dissipation is 3.6W (TA=25°C); design thermal management based on actual power dissipation.
- Thermal Resistance: θJA=34°C/W (EV9486-N-00A evaluation board, 2-layer); θJA=50°C/W (JESD51-7 4-layer board).
- Moisture Sensitivity: Yes (observe MSL moisture protection requirements).
- **Installation Instructions**:
- ESD Protection: The chip is ESD-sensitive; wear an anti-static wrist strap before handling.
- Soldering Temperature: Reflow peak temperature ≤260°C; soldering duration must comply with lead-free standards.
- Thermal Pad: The SOIC-8 EP exposed pad must be connected to a large copper area or thermal vias to ensure effective heat dissipation.
- Decoupling Capacitor: Connect an appropriate ceramic decoupling capacitor (e.g., 10µF or larger) in parallel between the VIN pin and ground.
- BST Capacitor: Connect a bootstrap capacitor (e.g., 0.1µF) between the BST and SW pins.
- Freewheeling Diode: Asynchronous rectification architecture; an external Schottky freewheeling diode is required at the SW pin.
- Inductor Selection: Select a suitable power inductor (e.g., 33µH) based on output current and switching frequency.
- Operate the device within the specified temperature range.
- **Troubleshooting**:
- No Output: Check if the input voltage is within the 4.5V–100V range; check the EN pin. ...check if the enable pin is active and if the FB pin feedback network is functioning correctly.
- Abnormal output voltage: Check the feedback resistor network (for adjustable versions) or verify the correct part number for fixed-output versions.
- Chip overheating: Check the thermal pad connection, verify if the load current exceeds 1A, and ensure the switching frequency setting is appropriate.
- Abnormal switching frequency: Check the inductance value and load conditions; note that in hysteretic control mode, the frequency varies with the load.
- PWM dimming failure: Check the DIM pin signal and duty cycle range.
- Frequent short-circuit protection triggering: Check for output short circuits and verify if the load current exceeds the 3.5A peak limit.
- **Alternative Part References**:
- MP9486AGN (Same model, without the "-Z" tape-and-reel suffix)
- MP9486GN (95V input version, similar specifications)
- MP9485 (Similar series, different current capability)
- MP9487 (Similar series, different specifications)
- MP9488 (Similar series, step-down regulator)
- Select the alternative model based on specific input voltage, output current, and package requirements.
- **Technical Support**: For further technical support, please contact Monolithic Power Systems (MPS) or a professional electronic component distributor.
Summary
The MP9486AGN-Z is a high-performance 100V-input step-down (buck) switching regulator manufactured by Monolithic Power Systems (MPS), housed in an SOIC-8 EP package. Its ultra-wide input voltage range (4.5V–100V), integrated high-side MOSFET with a 3.5A peak current limit, hysteretic voltage-mode control (requiring no external compensation), switching frequency up to 1MHz, and low quiescent current of 170µA make it an ideal choice for high-voltage step-down applications such as automotive electronics, industrial power supplies, solar systems, LED drivers, and e-bike controllers. The chip supports PWM dimming (for LED applications) and features built-in short-circuit and over-temperature protection; its automotive-grade operating temperature range (-40°C to +125°C) ensures high reliability. During repair or replacement, ensure the package type matches (SOIC-8 EP). ...thermal pad design), input voltage range, output current limits, and thermal conditions to ensure stable system operation.
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