ISL6545 – 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6545 Datasheet PDF learn more.

Part number : ISL6545

Functions : This is a kind of semiconductor, 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller.

Pin arrangement :

Package information :

Manufacturer : Intersil Corporation

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ISL6545 Datasheet PDF

The texts in the PDF file :

Data Sheet ISL6545, ISL6545A March 3, 2011 FN6305.6 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller The ISL6545, ISL6545A makes simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter driving N-Channel MOSFETs in a synchronous buck topology. Since it can work with either 5V or 12V supplies, this one IC can be used in a wide variety of applications within a system. The ISL6545, ISL6545A (hereafter referred to as “ISL6545x”, except as needed) integrates the control, gate drivers, output adjustment, monitoring and protection functions into a single 8 Ld SOIC or 10 Ld DFN package. The ISL6545x provides single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.6V, with a maximum tolerance of ±1.0% over-temperature and line voltage variations. A selectable fixed frequency oscillator (ISL6545 for 300kHz; ISL6545A for 600kHz) reduces design complexity, while balancing typical application cost and efficiency. The error amplifier features a 20MHz gain-bandwidth product and 9V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%. Protection from overcurrent conditions is provided by monitoring the rDS(ON) of the lower MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor. Pinout ISL6545, ISL6545A (8 LD SOIC) TOP VIEW BOOT 1 UGATE 2 GND 3 LGATE/OCSET 4 8 PHASE 7 COMP/SD 6 FB 5 VCC ISL6545, ISL6545A (10 LD 3×3 DFN) TOP VIEW BOOT 1 UGATE 2 N/C 3 GND 4 LGATE/OCSET 5 GND 10 PHASE 9 COMP/SD 8 FB 7 N/C 6 VCC

Features

• Operates from +5V or +12V Supply Voltage (for bias) – 1.0V to 12V VIN Input Range (up to 20V possible with restrictions; see Input Voltage Considerations) – 0.6V to VIN Output Range – Integrated Gate Drivers [ … ]

ISL6545 PDF File



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