LM336Z-5.0 Precision 5.0V Shunt Regulator Diode

Overview

The LM136-5.0/LM236-5.0/LM336-5.0 are monolithic integrated circuits designed to function as precision 5.0V shunt regulator diodes. These devices provide a stable voltage reference with low temperature coefficient and dynamic impedance, making them ideal for applications requiring accurate voltage regulation. The LM336Z-5.0 variant is particularly notable for its adjustable reference voltage capability, allowing fine-tuning between 4V and 6V via an external resistor.

These ICs are designed to replace standard Zener diodes in applications where higher precision and stability are required. Their three-terminal configuration (for adjustable variants) enables enhanced flexibility in circuit design, while their robust performance ensures reliability across a wide range of operating conditions.

Features

• Precision 5.0V Reference: Tight tolerance and low drift ensure accurate voltage regulation.
• Low Dynamic Impedance (0.6Ω): Provides stable performance under varying load conditions.
• Adjustable Output (4V to 6V): Third terminal allows for fine-tuning of the reference voltage.
• Low Temperature Coefficient: Minimizes voltage variations over temperature changes.
• Wide Operating Current Range: Functions reliably across a broad range of bias currents.
• High Stability: Excellent long-term stability for precision applications.
• Monolithic IC Construction: Ensures consistent performance and reliability.
• Available in Multiple Grades: LM136 (military), LM236 (industrial), and LM336 (commercial) variants.

Applications

The LM336Z-5.0 is widely used in applications requiring a stable and precise voltage reference. Key application areas include:

• Voltage Regulation: Used as a shunt regulator in power supplies and voltage stabilizers.
• Analog Circuits: Provides a stable reference for analog signal processing and conditioning.
• Data Acquisition Systems: Ensures accurate voltage references for ADCs and DACs.
• Test and Measurement Equipment: Used in precision instruments where voltage accuracy is critical.
• Industrial Controls: Provides reliable voltage references for control systems and sensors.
• Consumer Electronics: Used in devices requiring stable voltage references, such as audio equipment and displays.

Electrical Characteristics

Absolute Maximum Ratings

• Reverse Current (I_R): 15 mA (continuous)
• Power Dissipation (P_D): 400 mW (at 25°C)
• Operating Temperature Range:
  • LM136: -55°C to +125°C
  • LM236: -25°C to +85°C
  • LM336: 0°C to +70°C
• Storage Temperature Range: -65°C to +150°C

Typical Electrical Performance (at 25°C)

• Reference Voltage (V_REF): 5.0V ±0.2V
• Dynamic Impedance (Z_ZT): 0.6Ω (typical at 10 mA)
• Temperature Coefficient (TC): 30 ppm/°C (typical over full temperature range)
• Adjustment Range: 4V to 6V (with external resistor)
• Minimum Operating Current: 400 μA (to maintain regulation)
• Maximum Operating Current: 10 mA (for optimal performance)

Package Information

The LM336Z-5.0 is available in several industry-standard packages, ensuring compatibility with a wide range of PCB designs and assembly processes. The following packages are commonly available:

• TO-92 (Plastic Package): A compact, through-hole package suitable for prototyping and low-volume production.
• SOIC-8 (Surface Mount): A small-outline integrated circuit package ideal for space-constrained applications.
• TO-46 (Metal Can): A hermetic package offering superior thermal performance and durability for harsh environments.

Package Dimensions (TO-92 Example)

• Body Length: 4.95 mm (max)
• Body Width: 3.94 mm (max)
• Lead Spacing: 2.54 mm (standard)
• Lead Length: 12.7 mm (nominal)

Conclusion

The LM336Z-5.0 is a versatile and reliable precision voltage reference diode, offering excellent stability, low dynamic impedance, and adjustable output voltage. Its robust design and wide operating range make it suitable for a variety of applications, from industrial controls to consumer electronics. With multiple package options and performance grades, the LM336Z-5.0 provides engineers with a flexible solution for their voltage regulation needs.