MCR18EZHFL4R70: A high-efficiency P-channel MOSFET with small size and high energy

I. Overview of Chips

MCR18EZHFL4R70 is an 18V, 4.7Ω low-resistance P-channel MOSFET produced by ROHM (ROHM Semiconductor). 

It is packaged in an ultra-compact HSNT-8 (1.6×2.0mm) package and is specifically designed for high-density and high-efficiency power management. 

It is suitable for applications such as portable devices, battery protection and load switches.

II. Core Characteristics

✅ Ultra-low on-resistance (RDS(on))

Typical 47mΩ (@VGS=-4.5V), reducing power loss and improving efficiency.

✅ Small package

·HSNT-8 (1.6×2.0mm), saves PCB space and is suitable for high-integration design.

✅ Low threshold voltage (VGS(th))

·-0.7V (typical value), suitable for low-voltage control signals (such as 1.8V/3.3V MCU).

✅ High current capacity

The continuous drain current (ID) can reach -3.5A, and the pulse current (IDP) can reach -10A.

✅ Optimize switch performance

Low gate charge (Qg), suitable for high-frequency switching applications (such as DC-DC converters).

✅ Environmental design

· Compliant with RoHS standards, lead-free and halogen-free.

III. Key Parameter Table

Parameter specification test conditions

Drain-source voltage (VDSS) -18V

On-resistance (RDS(on)) : 47mΩ (typical), VGS=-4.5V, ID=-3.5A

Gate threshold voltage (VGS(th)) -0.7V (typical), VDS=-4V, ID=-250µA

Continuous drain current (ID) -3.5A Tc=25°C

Pulsed drain current (IDP) -10A single pulse

Operating temperature range: -55°C to +150°C

Package HSNT-8 (1.6×2.0mm) ultra-compact surface mount

Summary of advantages

· Smaller size: Saves approximately 20% of PCB space compared to competitors.

· Lower conduction loss: 47mΩ RDS(on) improves energy efficiency.

· Superior low-voltage drive: -0.7V threshold voltage compatible with modern low-power MCUS.

IV. Typical Application Scenarios

1.Portable electronic devices

Battery protection circuits for smart phones, TWS headphones, etc. (to prevent overcharging/overdischarging).

The load switch controls the power on and off of peripheral modules (such as cameras and sensors).

2. Power management

It is used for synchronous rectification or power path management of DC-DC converters.

High-side switch driven by low-voltage (1.8V/3.3V) MCU.

3. Internet of Things (IoT) devices

Energy-saving power control of the wireless module (Wi-Fi/BLE).

4. Industrial Module

Power switching for small PLCS and industrial control sensors.

VI. Suggestions for Model Selection and Substitution

· Higher current required: ROHM MCR30EZHFL2R50 (30V, 2.5mΩ, -8A).

· Smaller package required: Diodes DMG2301UX (1.0×1.0mm, but with a smaller current).

VII. Summary

ROHM's MCR18EZHFL4R70, with its ultra-small size (1.6×2.0mm), ultra-low on-resistance (47mΩ), and excellent low-voltage driving characteristics (-0.7V threshold), 

is an ideal choice for space-constrained and high-efficiency designs. Whether it's portable devices, IoT applications or industrial control systems, 

this MOSFET can provide reliable performance, helping engineers achieve more compact and efficient power management solutions