LM723CD

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LM723CD is a monolithic integrated programmable voltage regulator manufactured by STMicroelectronics, housed in a 14-lead SO-14 micro package. It supports positive or negative supply operation with an input voltage range up to 40V and an adjustable output voltage from 2V to 37V. The device provides an internal output current of 150mA without external pass transistors. Electrical characteristics include a line regulation of 0.1% (typical) for a 12V to 15V input change, load regulation of 0.15% (typical), and a reference voltage of 7.15V (typical). Quiescent current is typically 2.3mA at 30V input.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Monolithic integrated design supporting series, shunt, switching, and floating operations
• Internal current limiting capability with provisions for adjustable limits
• Flexible configuration for positive or negative supply applications
• Remote shutdown functionality available through dedicated pin connections

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Basic low voltage regulators
• High voltage regulators
• Negative voltage regulators
• Positive or negative floating regulators
• Switching regulators

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'CD' corresponds to the commercial temperature grade (0°C to +70°C) and SO-14 plastic package as defined in the ordering codes section. Confirm that the application requirements align with the absolute maximum ratings, particularly the junction temperature limit of 125°C for this variant. Ensure proper thermal management is implemented given the thermal resistance values specified for the SO-14 package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select the LM723CD when a precision voltage regulator is required with an adjustable output range between 2V and 37V. This component is suitable for designs needing internal current limiting without external discrete protection circuits. Consider the SO-14 package if surface-mount assembly is preferred over through-hole options. Verify that the load current does not exceed 150mA unless an external pass transistor is incorporated into the design.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The LM723 is a high-precision voltage regulator widely used in linear power supply designs. The 'C' suffix denotes the commercial temperature range, while 'D' indicates the SO-14 surface-mount package. It serves as a foundational component for creating stable DC voltages in various electronic systems, offering flexibility through its adjustable nature and multiple operational modes.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LM723CN: Equivalent device in DIP-14 package with commercial temperature rating.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the maximum output current without external components?

The LM723CD can provide up to 150mA of output current internally without requiring an external pass transistor.

Can the LM723CD be used for negative voltage regulation?

Yes, the device supports positive or negative supply operation and can be configured as a negative voltage regulator using appropriate external circuitry.

How is current limiting implemented?

The IC features internal current limiting. Provisions are made for adjustable current limiting using external resistors connected to the current limit pins.