LTC1156CSW#PBF

Overview

The LTC1156CSW#PBF is a high-side microprocessor MOSFET gate driver manufactured by Analog Devices Inc. It integrates four independent drivers within a single SOIC-16 package, featuring an internal charge pump to facilitate high-side switching without external bootstrap components. The device operates on a supply voltage range of 4.5 V to 18 V and supports CMOS logic inputs. Designed for robust performance, it includes a maximum dead-time specification of 60 µs to prevent shoot-through currents in bridge configurations. The component functions efficiently with a quiescent current of 180 µA and delivers output voltages up to 18 V, suitable for driving N-channel power MOSFETs in industrial applications.

Feature Summary

• Integrates four independent high-side gate drivers with an internal charge pump for simplified circuit design
• Features a specified maximum dead-time of 60 µs to ensure safe operation in half-bridge topologies
• Supports low-power operation with a minimal quiescent current requirement of 180 µA
• Compatible with standard CMOS logic input levels for direct interfacing with microprocessors

Applications

• Driving N-channel power MOSFETs in high-side configurations for motor control systems
• Power management circuits requiring isolated or floating high-side switching capabilities
• Industrial automation equipment utilizing synchronous rectification or bridge converter topologies

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliance when sourcing this component. Confirm that the SOIC-16 package dimensions match your PCB footprint requirements prior to integration. Ensure that the operating temperature range of 0°C to +70°C aligns with your system's thermal environment. Check current availability status as distribution channels may report limited stock or restricted supply conditions for this part number.

Selection Notes

Select the LTC1156CSW#PBF when a compact solution for multiple high-side switches is required without external charge pump complexity. Consider this part for designs needing precise dead-time control to minimize cross-conduction losses. Evaluate the 18 V maximum supply limit against your system's rail voltage to ensure adequate headroom. Compare the 180 µA quiescent current against power-sensitive alternatives if battery life is a critical constraint.

Part Context

This component belongs to the LTC1156 series of high-side MOSFET drivers from Analog Devices. It shares functional similarities with other members like the LTC1154 and LTC1155 but offers a higher channel count. The series is designed for applications requiring reliable high-side switching in space-constrained environments. It complements Analog Devices' portfolio of power management integrated circuits focused on efficiency and ease of implementation.

FAQ

Does the LTC1156CSW#PBF require an external bootstrap capacitor?

No, the device features an internal charge pump that eliminates the need for external bootstrap capacitors typically required in high-side driver circuits.

What is the maximum dead-time provided by this driver?

The datasheet specifies a maximum dead-time of 60 µs between the turn-off of one side and the turn-on of the other in a bridge configuration.