ISL97656 pdf datasheet (640kHz

The ISL97656 is a high frequency, high efficiency step-up
voltage regulator operated at constant frequency PWM
mode. With an internal 4.0A, 120mΩ MOSFET, it can deliver
up to 2A output current at over 90% efficiency. The
selectable 640kHz and 1.2MHz allows smaller inductors and
faster transient response. An external compensation pin
gives the user greater flexibility in setting frequency
compensation allowing the use of low ESR Ceramic output
capacitors.
When shut down, it draws <1μA of current and can operate
down to 2.3V input supply. These features along with
1.2MHz switching frequency makes it an ideal device for
portable equipment and TFT-LCD displays.
The ISL97656 is available in a 10 Ld TDFN package with a
maximum height of 1.1mm. The device is specified for
operation over the full -40°C to +85°C temperature range.