New force of voltage regulator diode: MMBZ5248B and Jiangsu Changjing's domestic breakthrough

New force of voltage regulator diode: MMBZ5248B and Jiangsu Changjing's domestic breakthrough
  
In modern electronic systems, although the voltage regulator diode is small, it plays a crucial role in voltage clamping and circuit protection. MMBZ5248B is a classic miniaturized voltage regulator diode solution, which adopts a compact SOT23 package (size only 2.92 × 1.3 × 0.93mm), but achieves 18V Zener voltage and high-precision voltage regulation capability of ± 5%. Its core performance parameters include a maximum power dissipation of 350mW, a dynamic impedance of 21 Ω, and stable output characteristics at a standard test current of 7mA. In terms of extreme environmental adaptability, it supports an industrial grade operating temperature range of 55 ° C to+150 ° C, with reverse leakage current as low as 100nA@14V It exhibits excellent temperature stability and energy efficiency performance.
 
Domestic technology base: IDM layout of Jiangsu Changjing
Although Jiangsu Changjing Technology (JSCJ) has not publicly claimed to directly produce the MMBZ5248B model, its voltage regulator diode product line already has the technical strength to benchmark international standards. As a semiconductor enterprise established in Jiangbei New District, Nanjing in 2018, Changjing Technology has completed the vertical integration transformation of IDM from design to manufacturing by integrating the discrete device department of the original Changdian Technology and acquiring key enterprises in the industry chain such as Xinshun Microelectronics. Its technological core advantages focus on three major directions:
Low voltage drop design: By optimizing the planar/trend structure, the forward voltage (VF) is reduced by 25% compared to similar products, significantly reducing conduction losses;
 
High reliability packaging: The independent SOT23 packaging production line supports high junction temperature operation at 175 ℃, suitable for harsh environments such as automotive electronics;
Wafer autonomy and controllability: Subsidiary Xinshun Micro provides 5/6-inch wafers, optimizes epitaxial layer processes, and improves voltage resistance and response speed.
 
Performance Benchmarking and Innovation Breakthrough
The long crystal voltage regulator diode series (such as automotive grade Zener products) has achieved comprehensive coverage of MMBZ5248B in key parameters:
 
Voltage accuracy: Supports 18V ± 5% voltage stabilization accuracy, matching international mainstream specifications;
 
Power density: 350mW power consumption capability and 21 Ω dynamic impedance ensure stability under high loads;
High frequency characteristics: Fast recovery diode technology extends to the field of voltage regulation, with reverse recovery time shortened to 5ns, suitable for high-frequency scenarios such as new energy vehicle OBC.
 
Its technological barriers are more reflected in the automotive grade certification - multiple diodes have passed AECQ101 certification and successfully imported BMS systems from car companies such as BYD, breaking the long-term monopoly of Japanese and American enterprises.
 
Strategic depth of domestic substitution
 
Changjing Technology's strategic layout directly targets the core pain points of semiconductor localization: