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MP9447GL-Z
MP9447GL-Z – High-Efficiency 5A, 36V Synchronous Step-Down Converter
📌 Product Overview
The MP9447GL-Z is a fully-integrated, high-frequency, synchronous rectified step-down switch-mode converter from Monolithic Power Systems (MPS) [citation:2][citation:4]. It offers a very compact solution to achieve a 5A continuous output current over a wide input-supply range with excellent load and line regulation, while providing fast transient response and good stability [citation:2][citation:7][citation:8].
MP9447GL-Z – High-Efficiency 5A, 36V Synchronous Step-Down Converter
📌 Product Overview
The MP9447GL-Z is a fully-integrated, high-frequency, synchronous rectified step-down switch-mode converter from Monolithic Power Systems (MPS) [citation:2][citation:4]. It offers a very compact solution to achieve a 5A continuous output current over a wide input-supply range with excellent load and line regulation, while providing fast transient response and good stability [citation:2][citation:7][citation:8].
⚙️ Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5V to 36V [citation:1][citation:2][citation:3] |
| Output Current | 5A (Continuous) [citation:2][citation:4][citation:8] |
| Output Voltage Range | 0.8V to 0.9 × VIN (Adjustable) [citation:2][citation:7][citation:8] |
| Switching Frequency | 200kHz to 650kHz [citation:1][citation:2][citation:3] |
| Synchronous Rectifier | Yes [citation:1][citation:2][citation:3] |
| Internal Power MOSFETs | 65mΩ High-Side, 30mΩ Low-Side [citation:2][citation:6][citation:7] |
| Reference Voltage Accuracy | 1.5% [citation:2][citation:6][citation:7] |
| Quiescent Current (Iq) | 500 µA [citation:2] |
| Operating Temperature | -40°C to +125°C [citation:1][citation:2][citation:3] |
| Package | 20-QFN (3mm × 4mm) [citation:1][citation:2][citation:3] |
✨ Key Features
- Wide 4.5V-to-36V Operating Input Range – Supports a broad range of applications from consumer to industrial power supplies [citation:2][citation:7][citation:8]
- Guaranteed 5A Continuous Output Current – Delivers robust power delivery for demanding loads [citation:2][citation:4][citation:8]
- Internal 65mΩ High-Side, 30mΩ Low-Side Power MOSFETs – Enhances efficiency and reduces external component count [citation:2][citation:6][citation:7]
- Proprietary Switching-Loss-Reduction Technology – Optimizes performance at high switching frequencies [citation:2][citation:6][citation:7]
- 1.5% Reference Voltage Accuracy – Ensures precise output voltage regulation [citation:2][citation:6][citation:7]
- Programmable Soft-Start Time – Controls inrush current during power-up [citation:2][citation:6][citation:7]
- Low Drop-out Mode – Maintains regulation even when input voltage is close to output [citation:2][citation:6][citation:7]
- Comprehensive Protection Features – Includes SCP, OCP, UVP, and Thermal Shutdown [citation:2][citation:4][citation:7]
- Minimal External Components – Simplifies design and reduces BOM cost [citation:2][citation:4][citation:7]
📦 Packaging & Ordering Information
| Package Type | 20-QFN (3mm × 4mm) [citation:1][citation:2][citation:3] |
| Part Status | Active – Production [citation:1][citation:3][citation:10] |
| Standard Package Quantity | 5,000 (Tape & Reel) [citation:3][citation:10] |
| MSL Rating | Level-1-UNLIMITED [citation:1][citation:3] |
| Lead Finish | NiPdAu [citation:1] |
🔧 Applications
- General Consumer USB Power Supplies – Provides efficient 5A power delivery [citation:2][citation:8]
- Cigarette Lighter Adapters – Automotive applications with wide input range [citation:2][citation:8]
- Power Supplies for Chargers – Suitable for charging large batteries or multiple devices [citation:2][citation:8]
- Industrial Power Systems – Requires reliable 36V input capability
- High-Power Consumer Electronics – Supports 5A continuous loads
⚡ Working Principle & Architecture
The MP9447GL-Z is a fully-integrated synchronous step-down converter that operates from a wide 4.5V to 36V input range [citation:2][citation:4][citation:8]. It integrates 65mΩ high-side and 30mΩ low-side power MOSFETs to achieve high efficiency and reduce the need for external components [citation:2][citation:6][citation:7]. The device uses a constant-frequency peak-current mode control architecture for fast transient response and excellent stability across the full input and load range [citation:2][citation:4][citation:7].
Key differentiation: The proprietary switching-loss-reduction technology enables high efficiency across a wide load range, making it an ideal solution for space-constrained designs requiring high current delivery and excellent thermal performance [citation:2][citation:6][citation:7].
📋 Compliance & Environmental
| RoHS Status | ROHS3 Compliant [citation:1][citation:3][citation:10] |
| REACH Status | REACH Unaffected [citation:1][citation:3] |
| US ECCN | EAR99 [citation:1][citation:3][citation:10] |
| HTSUS | 8542.39.0070 [citation:1][citation:3] |
For complete technical documentation including the full datasheet and application notes, please visit the Monolithic Power Systems product page or contact your authorized distributor. Evaluation boards (EV9447-L-00A) are available for development and testing [citation:4][citation:6][citation:11].
