The ISL78206 is an AEC-Q100 qualified 40V, 2.5A synchronous

buck controller with a high-side MOSFET and low-side driver

integrated. The ISL78206 supports a wide input voltage range

from 3V to 40V, output current up to 2.5A, and can be

operated in synchronous and non-synchronous buck

topologies. The ISL78206 provides a low system cost, high

efficiency, single part buck solution for automotive

applications for a wide variety of input voltages. For vehicle

systems that must be kept powered during cold-cranking or

start-stop operation, the ISL78206 can be replaced by its

pin-to-pin alternative, the ISL78201 which offers boost-buck

operation. Together, these devices offer two functional

alternatives on the same PCB layout, providing convenience,

flexibility, and facilitating extensive design reuse.

The ISL78206 offers the most robust current protections. It

uses peak current mode control with cycle-by-cycle current

limiting. It is implemented with frequency foldback

undercurrent limit conditions. In addition, the hiccup

overcurrent mode is also implemented to guarantee reliable

operations under harsh short conditions.

The ISL78206 has comprehensive protections against various

faults, including overvoltage, undervoltage, programmable

overcurrent and over-temperature. Built-in soft-start allows the

IC to start-up smoothly and is reactivated during hiccup mode

fault recovery.

Features

• Ultra wide input voltage range 3V to 40V (refer to “Input

Voltage” on page 12 for more details)

• Less than 5µA (max) shutdown input current (IC disabled)

• Temperature range -40°C to +105°C

• Integrated high-side MOSFET

• Operational topologies

- Synchronous buck

- Non-synchronous buck

• Programmable frequency from 200kHz to 2.2MHz and

frequency synchronization capability

• ±1 tight voltage regulation accuracy

• Reliable cycle-by-cycle overcurrent protection

- Temperature compensated current sense

- Frequency foldback

- Programmable OC limit

- Hiccup mode protection in worst case short condition

• 20 Ld HTSSOP package, pin-to-pin compatible with

ISL78201 boost buck

• AEC-Q100 qualified

• Pb-free (RoHS compliant)

Applications

• Automotive applications

• General purpose power regulator

• 24V bus power

• Battery power

• Embedded processor and I/O supplies