ILC6383 Datasheet | Fairchild Semiconductor

Features - - - - - - - - - - - - Guaranteed start up in PWM at 0.9V input Synchronous rectification requires no external diode True load disconnect from battery input in shutdown Up to 75m A at 3.3V and 40m A at 5V from 1V input Up to 375m A at 3.3V and 300m A at 5V from 3V input Peak efficiency > 90% 1µA battery input current in shutdown (with VOUT = 0V) Internal Oscillator frequency: 300k Hz to ±15% ILC6383: Fixed 3.3V or 5V output ILC6383-ADJ: Adjustable output to 6V maximum Low battery detector with 100ms transient rejection delay Powergood output flag when VOUT is in regulation Description The ILC6383 series of step-up DC-DC converters operate from 1-cell to 3-cell input. They are direct replacement for ILC6382, in applications where SYNC pin is not used. The PFM or PWM operating mode is user selectable through SEL pin connected to ground or left open, respectively. The choice should be dependent upon the current to be delivered to the load: PFM is remended for input voltage higher than 1.5V and loads below 100m A, while PWM is remended for more than 50m A load current and in noise sensitive applications. In shutdown mode, the device allows true load disconnect from battery input. Designed for wireless munications applications, the oscillator frequency is set at 300k Hz with no harmonics at sub 20k Hz audio band or at 455k Hz IF band. Internal synchronous rectification and externally selectable PFM/PWM mode of operation allows the selection of the best efficiency at light or full load. The ILC6383 is capable of delivering 75m A at 3.3V output from a single cell input. The ILC6383-XX offers 3.3V or 5V fixed output voltage while the ILC6383-ADJ allows adjustable output voltage to 6V maximum. Output voltage accuracy is ±3.5% over full operating temperature range. Additional features include power good output (POK) and an internal low battery detector with 100ms transient rejection delay. The device will reject low battery input transients under 100ms in duration. The ILC6383...