ILC6383

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 75mA at 3.3V and 40mA at 5V from 1V input
• Up to 375mA at 3.3V and 300mA at 5V from 3V input
• Peak efficiency > 90%
• 1µA battery input current in shutdown (with V_OUT = 0V)
• Internal Oscillator frequency: 300kHz 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 V_OUT is in regulation


Application

• Cellular Phones, Pagers
• Palmtops, PDAs and portable electronics
• High efficiency 1V step up converters


Pinout




Specifications

Parameter	Symbol	Ratings	Units
Voltage on VOUT pin	VOUT	-0.3 to 7	V
Voltage on LBI, Sync,LBO , POK , VFB , LX and VIN pins	-	-0.3 to 7	V
Peak switch current on LX pin	ILX	1	A
Current on LBO pin	ISINK(LBO)	5	mA
Continuous total power dissipation at 85°C	PD	315	mW
Short circuit current	ISC	Internally protected (1 sec. duration)	A
Operating ambient temperature	TA	-40 to 85
Maximum junction temperature	TJ(MAX)	150
Storage temperature	Tstg	-40 to 125
Lead temperature (soldering 10 sec.)		300
Package thermal resistance	JA	206	/W

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 recommended for input voltage higher than 1.5V and loads below 100mA, while PWM is recommended for more than 50mA load current and in noise sensitive applications. In shutdown mode, the device allows true load disconnect from battery input. Designed for wireless communications applications, the oscillator frequency is set at 300kHz with no harmonics at sub 20kHz audio band or at 455kHz 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 75mA 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 series is available in a space saving eight lead micro SOP (MSOP-8) package.