NCP4523

Features:

• Ultra−Low Supply Current
• Low Standby Current
• Low Dropout Voltage
• High Ripple Rejection, Typical 70 dB (f = 1.0 kHz)
• High Output Voltage Accuracy, 2.0%
• Excellent Load Transient Response and Line Transient Response
• Small Package 8−Pin SSOP
• Maximum Input Voltage 6.0 V
• Pb−Free Package is Available


Application

• Power Source for Cellular Phones such as GSM, CDMA and Personal Handy−Phone System
• Power Source for Electrical Appliances such as Cameras, VCRs, Camcorders, etc.
• Power Source for Battery−Powered Equipment


Pinout




Specifications

Rating	Symbol	Value	Unit
Input Voltage	VIN	7.0	V
Input Voltage (CE Pin)	CE	−0.3~ VIN + 0.3	V
Output Voltage	VOUT	−0.3 ~ VIN + 0.3	V
Output Current (VOUT1)	IOUT1	200	mA
Output Current (VOUT2)	IOUT2	100	mA
Output Current (VOUT3)	IOUT3	100	mA
Power Dissipation	PD	300	mW
Operating Temperature Range	Topr	-40 ~ 85
Storage Temperature Range	Tstg	-55 ~ 125

Maximum ratings are those values beyond which device damage can occur. Maximum ratings
applied to the device are individual stress limit values (not normal operating conditions) and
are not valid simultaneously. If these limits are exceeded, device functional operation is not
implied, damage may occur and reliability may be affected.


Description

The NCP4523 Series are multi voltage regulator ICs with high output voltage accuracy, extremely low supply current, low noise, low ON−resistance and high ripple rejection by CMOS process. The NCP4523 Series contain three voltage regulators. Each of these voltage regulators in the NCP4523 Series consists of a voltage reference unit, an error amplifier, resistors for setting output voltage, a current limit circuit and a chip enable circuit.

The chip enable function contributes to prolong battery life. Further, regulators in the NCP4523 Series are with low dropout voltage, excellent load transient response and line transient response, thus the NCP4523 series are very suitable for the power supply for hand−held communication equipment.The output voltage of each regulator is fixed with high accuracy by laser trim.Since the package for these ICs is SSOP−8, high density mounting of the ICs on boards is possible.