DATASHEET
ISL80030, ISL80030A, ISL80031, ISL80031A FN8766
Rev.2.00
Nov 16, 2017 3A Synchronous Buck Converter in 2x2 DFN Package
The ISL80030, ISL80030A, ISL80031, and ISL80031A are highly
efficient, monolithic, synchronous step-down DC/DC converters
that can deliver up to 3A 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. These devices
operate at either a 1MHz or 2MHz switching frequency, thereby
providing superior transient response and allowing for the use of
small inductors. They also have excellent stability. Features VIN range 2.7V to 5.5V Up to 3A of output current Switching frequency of 1MHz or 2MHz (see Table 1 on page 3) 35ВµA quiescent current (ISL80031 and ISL80031A) Overcurrent and short-circuit protection The ISL80030, ISL80030A, ISL80031, and ISL80031A integrate
very low rDS(ON) MOSFETs to maximize efficiency. In addition,
because the high-side MOSFET is a PMOS, the need for a Boot
capacitor is eliminated, thereby reducing external component
count. The devices can operate at 100% duty cycle. Over-temperature/thermal protection The ISL80030 and ISL80030A are configured for PWM pulse
width modulation operation and provide a fast transient
response, which helps reduce the output noise and RF
interference. Internal soft-start and soft-stop Negative current protection Power-good and enable 100% duty cycle VIN undervoltage lockout and VOUT overvoltage protection Up to 95% peak efficiency The ISL80031 and ISL80031A are configured for PFM
discontinuous conduction operation and provide high
efficiency by reducing switching losses at light loads. Applications These devices are offered in a space saving 8 Ld 2mmx2mm
DFN Pb-free package with exposed pad for improved thermal
performance. The complete converter occupies an area less …