LT1303CS8-5#PBF

Overview

The LT1303CS8-5#PBF is a micropower step-up DC/DC converter manufactured by Analog Devices Inc. It operates in Boost topology within an SOIC-8 package. The device accepts an input voltage range of 1.8 V to 6 V and provides a fixed regulated output of 5 V. It supports an output current of 200 mA with a switching frequency of 155 kHz. Quiescent current is specified at 120 µA, which reduces further during shutdown. The component functions within a temperature range of 0°C to +70°C.

Feature Summary

• Integrates Burst Mode operation for high efficiency in low-power applications
• Includes a low-battery detector with open-collector output capability
• Features an on-chip NPN power switch with low saturation voltage
• Supports shutdown mode to minimize standby current consumption

Applications

• Small battery-operated systems requiring efficient step-up conversion
• Low-voltage portable electronic devices
• Applications necessitating low quiescent current operation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliant packaging when sourcing. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the fixed 5V output aligns with system load specifications. Check for RoHS compliance documentation if required by regional regulations. Validate that the 120 µA quiescent current meets your battery life targets.

Selection Notes

Select this part when a fixed 5V output is required from a single-cell or dual-cell battery source. Compare against adjustable variants like the LT1303 if variable output voltages are needed. Consider the LT1305 or LT1302 if higher output currents exceeding 200 mA are necessary. Evaluate the 155 kHz switching frequency against EMI constraints in your design.

Part Context

This component belongs to the LT1303 series of micropower high-efficiency DC/DC converters. The series includes both adjustable and fixed voltage versions. The LT1303-5 specifically denotes the fixed 5V output variant. These converters utilize Burst Mode operation to maintain efficiency across varying load conditions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.