The MP2145GD-Z is a high-efficiency synchronous step-down (Buck) switching regulator manufactured by Monolithic Power Systems (MPS). It features an operating input voltage range of 2.8V to 5.5V and supports continuous output current of up to 6A. The output voltage is adjustable from 0.6V to 5.5V, making it suitable for a wide range of power management applications.
The MP2145GD-Z integrates high-side and low-side power MOSFETs, reducing the need for external switching components and simplifying power supply design. It operates at a fixed switching frequency of 1.2MHz and uses constant-on-time (COT) control technology to provide fast transient response and simplified loop compensation.
The device features low on-resistance internal power MOSFETs, with typical high-side and low-side on-resistances of 20mΩ and 12mΩ, respectively. Its synchronous rectification architecture helps improve power conversion efficiency and reduce conduction losses.
The MP2145GD-Z offers a typical quiescent current of 40μA and a feedback voltage accuracy of ±1%, supporting efficient power management and stable output regulation. It also supports 100% duty-cycle operation under dropout conditions, allowing the output voltage to remain regulated when the input-to-output voltage difference becomes small.
The regulator incorporates several integrated protection and control functions, including cycle-by-cycle overcurrent protection, short-circuit protection with hiccup mode, thermal shutdown, and output discharge. Its internal 1.5ms soft-start function with pre-biased startup helps provide controlled power-up behavior.
Additional features include external operating mode selection, analog output voltage control through the MODE/VCON pin, and a power-good (PG) status indicator. These functions provide flexibility for power management designs requiring dynamic voltage regulation and system power monitoring.
The MP2145GD-Z comes in a compact QFN-12 surface-mount package measuring 2.0 × 3.0mm, making it suitable for space-constrained PCB layouts and automated SMT assembly.
The device operates across a junction temperature range of -40°C to +125°C, supporting reliable performance in various electronic operating environments.
The MPS MP2145GD-Z is suitable for solid-state drives (SSD), hard disk drives (HDD), portable instruments, battery-powered devices, high-performance DSPs, FPGAs, and distributed power systems.
The MP2145GD-Z ordering suffix indicates tape-and-reel packaging, supporting automated pick-and-place assembly and high-volume electronic manufacturing.
Key Features:
- Manufacturer: Monolithic Power Systems (MPS)
- Part Number: MP2145GD-Z
- Product Series: MP2145
- Product Type: Synchronous Step-Down DC-DC Converter
- Topology: Buck
- Input Voltage Range: 2.8V to 5.5V
- Adjustable Output Voltage: 0.6V to 5.5V
- Maximum Output Current: 6A
- Switching Frequency: 1.2MHz
- Control Architecture: Constant-On-Time (COT)
- Rectification: Synchronous
- High-Side MOSFET On-Resistance: 20mΩ Typical
- Low-Side MOSFET On-Resistance: 12mΩ Typical
- Quiescent Current: 40μA Typical
- Feedback Voltage Accuracy: ±1%
- Internal Soft-Start Time: 1.5ms
- Dropout Operation: 100% Duty Cycle
- Protection Functions: Overcurrent Protection, Short-Circuit Protection, Thermal Shutdown
- Additional Features: Hiccup Mode, Output Discharge, Power-Good Indicator, External Mode Control
- Package: QFN-12
- Package Dimensions: 2.0 × 3.0mm
- Operating Junction Temperature: -40°C to +125°C
- Mounting Type: Surface Mount (SMD/SMT)
- Packaging: Tape and Reel
- Environmental Compliance: Lead-Free, Halogen-Free, RoHS Compliant
Typical Applications:
- Solid-state drives (SSD)
- Hard disk drives (HDD)
- Portable electronic instruments
- Battery-powered devices
- High-performance DSP systems
- FPGA power supplies
- Distributed power systems
- Embedded computing systems
- Compact electronic equipment
- High-current power management circuits
The MPS MP2145GD-Z combines 6A output capability, 1.2MHz switching frequency, synchronous rectification, and adjustable output voltage in a compact QFN-12 package. Its COT control architecture, low quiescent current, integrated power MOSFETs, and comprehensive protection functions make it a practical solution for electronic manufacturers, hardware engineers, and procurement teams seeking high-efficiency DC-DC power conversion solutions.
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