3
14
NN30320A-EVB
User’s Guide
for Evaluation Board
Revised
Total Pages
Page
Automotive & Industrial Systems Company, Panasonic Corporation
Regulations
No.
320R202E
2013-05-07
Note: The parameters above is subject to change for improvement without notice.
Table 1. Input Voltage and Output Current Summary
1 Introduction
This user’s guide contains background information for the
NN30320A : 3A Synchronous DC-DC Step Down Regulator with Integrated Power MOSFET
as well as support documentation for the NN30320A Evaluation Board (NN30320A-EVB). Also included are the schematic, the test set-
up, the bill of materials and the Board Layout for the Evaluation Board.
1.1 Overview
NN30320A is a synchronous DC-DC Step Down Regulator (1-ch) with integrated power MOSFETs, which employs hysteretic control
system. By this system, when load current changes suddenly, it responds at high speed and minimizes the changes of output vol tage.
Since it is possible to use capacitors with small capacitance and it is unnecessary to add external parts for system phase compensation,
this IC realizes downsizing of set and reducing in the number of external parts.
Output voltage is adjustable by user. Maximum current is 3 A.
1.2 Features
—High-speed response DC-DC Step Down Regulator circuit that employs the hysteretic control system
—Integrated Two 20mΩ (Typ) MOSFETs for high efficiency
—Switchable FCCM (continuous) / SKIP (discontinuous) mode
—Input Voltage Range: 4.5V ~ 28V
—Output Voltage Range: 0.75V ~ 5.5V
—Selectable Switching Frequency 210kHz / 430kHz / 650kHz
—Adjustable Soft Start
—Low Operating and Standby Quiescent Current
—Indication for normal Output Voltage to PGOOD pin
—Built-in Under Voltage Lockout (UVLO), Thermal Shut Down (TSD), Output Over-Voltage Detection (OVD), Output Over-Current
Protection (OCP), Short-Circuit Protection (SCP) functions
Input voltage and output current range for the evaluation Board are given in Table 1.
1.3 Typical Applications
—High Current Distributed Power Systems such as HDDs (Hard Disk Drives), SSDs (Solid State Drives), PCs, Game consoles, Severs,
Security Cameras, Network TVs, Home Appliances, OA Equipment etc.
1.4 Package
— 24pin Plastic Quad Flat Non-leaded Package Heat Slug Down (QFN Type)
(Size : 4
4 mm, 0.5 mm pitch)
1.5 Type
—Multichip IC
Evaluation Board
Input Voltage range
Output Current Range
EVB-NN30321A
PVIN, AVIN = 4.5V to 28V *1
V-EN = 1.5V to 5V
0A to 3A
*1 : PVIN pin and AVIN pin are normally connected on Evaluation Board by 0 ohm resister (R-AVIN).