Advanced Load Management
NCP4543
ecoSwitcht Advanced Load Management
Controlled Load Switch with Low RON
The NCP4543 load switch provides a comp...
Description
NCP4543
ecoSwitcht Advanced Load Management
Controlled Load Switch with Low RON
The NCP4543 load switch provides a component and area-reducing solution for efficient power domain switching with inrush current limit via soft start. It is designed to integrate control and driver functionality with a high performance low on-resistance power MOSFET in a single device. This cost effective solution is ideal for power management and hot−swap applications requiring low power consumption in a small footprint.
Features
Advanced Controller with Charge Pump Integrated N−Channel MOSFET with ESD Protection Soft−Start via Adjustable Slew Rate Control Low On−Resistance Input Voltage Range 0.5 V to 6 V Low Standby Current Load Bleed Function No External Components Required Enable Pins with CMOS Input Levels This is a Pb−Free Device
Typical Applications
Notebook and Tablet Computers Handheld Electronics Digital Cameras Portable Medical Devices Hard Drives Peripheral Ports
3 V − 5.5 V
Controller
0.5 V − 6 V
www.onsemi.com
RON TYP 10.2 mW 12.2 mW
VCC 5.0 V 3.3 V
VIN 1.8 V 5.0 V
IMAX 7.3 A
MARKING DIAGRAM
1
QFN18, 3x3 CASE 485BF
1 NCP 4543 ALYW G
A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package
PIN CONFIGURATION
DELAY 1 VCC 2 GND 3 VIN 4
19: VIN
13 BLEED 12 VIN 11 VIN 10 VIN
VIN 14 EN 15 POL 16 SR 17 VIN 18
VIN
EN POL VCC
DELAY SR
GND BLEED
VOUT VIN 5
VOUT 6 VOUT 7 VOUT 8
VIN 9
Bandgap &
Biases
Charge Pump
RC Osci...
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