LM3370SD-4221/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3370SD-4221/NOPB is a dual synchronous step-down DC-DC converter manufactured by Texas Instruments. It operates with an input voltage range of 2.7 V to 5.5 V and provides two independent output channels fixed at 1.8 V and 3.3 V. Each channel supports an output current of 600 mA. The device integrates a 2 MHz switching frequency and functions within a temperature range of -30°C to +85°C. It utilizes a WSON-16 package and draws 600 µA in operating mode.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual-channel synchronous buck topology for efficient power conversion
• Integrated high-side and low-side MOSFETs for compact design
• Fixed output voltage configuration eliminating external resistor networks

Voltage Regulators - DC DC Switching Regulators Applications

• Powering ultra-low voltage digital circuits from single lithium-ion batteries
• Portable electronic devices requiring multiple regulated rails
• Industrial control systems with limited input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation as Texas Instruments, as National Semiconductor was acquired. Confirm the specific suffix /NOPB indicates lead-free and RoHS compliance. Ensure the WSON-16 package type matches the target PCB footprint. Cross-reference the fixed output voltages (1.8 V and 3.3 V) against system requirements to prevent mismatched supply rails.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a dual-output solution is required from a single-cell lithium-ion source. The fixed 1.8 V and 3.3 V outputs simplify bill of materials compared to adjustable regulators. The 600 mA per channel rating suits moderate load applications. Consider the 2 MHz frequency for smaller passive component sizes compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3370 series of dual synchronous step-down converters. It is designed specifically for applications driven by single lithium-ion batteries or 2.7 V to 5.5 V input rails. The series emphasizes efficiency and compactness for portable and industrial electronics requiring multiple low-voltage supplies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative components.