Compact Synchronous Buck Regulators

The ISL8002, ISL8002A, ISL80019 and ISL80019A are highly efficient, monolithic, synchronous step-down DC/DC converters that can deliver up to 2A of continuous output current from a 2.7V to 5.5V input supply. They use peak current mode control architecture to allow very low duty cycle operation. They operate at either 1MHz or 2MHz switching frequency, thereby providing superior transient response and allowing for the use of small inductors. They also have excellent stability and provide both internal and external compensation options.

Features

• VIN range 2.7V to 5.5V

• VOUT range is 0.6V to VIN

• IOUT maximum is 1.5A or 2A (see Table 1 on page 3)

• Switching frequency is 1MHz or 2MHz (see Table 1 on page 3)

• Internal or external compensation option

• Selectable PFM or PWM operation option

• Overcurrent and short circuit protection

• Over-temperature/thermal protection

• VIN Undervoltage Lockout and VOUT Overvoltage Protection

• Up to 95 peak efficiency

Applications

• General purpose point of load DC/DC

• Set-top boxes and cable modems

• FPGA power

• DVD, HDD drives, LCD panels, TV