LM3704XDMM-232/NOPB

Supervisors Overview

The LM3704XDMM-232/NOPB is a high-efficiency step-down switching regulator from Texas Instruments, designed for battery-powered applications. It operates with an input voltage range of 2.7V to 5.5V and delivers up to 1A output current. The device integrates a 160mΩ high-side switch and a 180mΩ low-side switch. It supports adjustable output voltages via external resistors and features a fixed 2.32V reference option in this specific suffix variant. Operating frequencies are selectable between 600kHz and 1.2MHz to optimize inductor size and efficiency.

Supervisors Feature Summary

• Integrated synchronous rectification with low on-resistance switches for enhanced power conversion efficiency.
• Fixed internal oscillator frequency options allow for optimization of external component size and transient response.
• Comprehensive protection mechanisms including cycle-by-cycle current limiting, thermal shutdown, and undervoltage lockout.

Supervisors Applications

• Portable consumer electronics such as smartphones and tablets
• Personal digital assistants (PDAs) and handheld devices
• Battery-operated instrumentation and measurement equipment

Supervisors Procurement Notes

Verify the exact suffix '232' confirms the fixed 2.32V output configuration rather than an adjustable version. Ensure the 'DMM' package designation matches the required TSSOP-10 footprint and thermal requirements for the target PCB layout. Cross-reference the 'NOPB' indicator to confirm lead-free and RoHS compliance status against current manufacturing standards.

Supervisors Selection Notes

Select this component when a compact solution is required for single-cell lithium-ion or nickel-based battery systems. The fixed 2.32V output simplifies design for specific logic levels or biasing needs without requiring feedback resistor calculations. Consider the 1A current limit when sizing the external inductor and ensuring adequate thermal dissipation in the TSSOP-10 package for the expected load profile.

Supervisors Part Context

This part belongs to the LM3704 family of synchronous buck converters. Unlike the standard LM3704 which offers adjustable output, the '-232' suffix denotes a fixed output voltage variant. It shares the same core architecture and pinout with other members of the series but provides a specific voltage rail directly, reducing external component count for targeted applications.

Supervisors Replacement Considerations

Direct replacements include the LM3704XDEPR-232/NOPB for the same fixed voltage in a different package, or the LM3704XDEP/NOPB for an adjustable version if circuit modification is acceptable. Verify that any substitute maintains the 2.7V to 5.5V input range and 1A current capability.