NCP1411

Features:

Pb-Free Package is Available
High Efficiency, up to 92%
Very Low Device Quiescent Supply Current of 9.0 A Typical
Built-in Synchronous Rectifier (P-FET) Eliminates One External Schottky Diode
High Switching Frequency (up to 600 kHz) Allows use of Small Size
Inductor
High Accuracy Reference Output, 1.19 V 0.6% @ 25, can supply more than 2.5 mA when V_OUT 3.3 V
Ring-Killer for Quiet Operation in Discontinuous Conduction Mode
1.0 V Startup at No Load Guaranteed
Output Voltage from 1.5 V to 5.5 V Adjustable
Output Current up to 250 mA @ V_IN = 2.5 V, V_OUT = 3.3 V
Logic-Controlled Shutdown
Open Drain Low-Battery Detector Output
1.0 A Cycle by Cycle Current Limit
Low Profile and Minimum External Parts
Compact Micro8 Package 


Application

Personal Digital Assistant (PDA)
Handheld Digital Audio Product
Camcorder and Digital Still Camera
Handheld Instrument
Conversion from One or Two NiMH or NiCd, or One Li-ion Cell to 3.3 V/5.0 V


Pinout




Specifications

Rating	Symbol	Value	Unit
Device Power Supply (Pin 8)	VOUT	-0.3 to 6.0	V
Input/Output Pins (Pins 1-5, Pin 7)	VIO	-0.3 to 6.0	V
Thermal Characteristics - Micro8 Plastic Package Maximum Power Dissipation @ TA  = 25 Thermal Resistance, Junction-to-Air	PD RJA	520 240	Mw /W
Operating Junction Temperature Range	TJ	-40 to +150
Operating Ambient Temperature Range	TA	-40 to +85
Storage Temperature Range	Tstg	-55 to +150

Description

NCP1411 is a monolithic micropower high frequency Boost (step-up) voltage switching converter IC specially designed for battery operated hand-held electronic products up to 250 mA loading. NCP1411integrates Synchronous Rectifier for improving efficiency as well as eliminating the external Schottky Diode. High switching frequency (up to 600 kHz) allows low profile inductor and output capacitor being used. Low-Battery Detector, Logic-Controlled Shutdown and
Cycle-by-Cycle Current Limit of NCP1411 provide value-added features for various battery-operated applications. The innovative Ring-Killer circuitry guarantees quiet operation in discontinuous conduction mode. With all these functions ON, the device quiescent supply current is only 9.0 A typical. This NCP1411 is available in the space saving compact Micro8 package.