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Regulations
312A805E
No.
1 Introduction
This user's guide contains background information for the
NN30312A : 10A Synchronous DCDC Step Down Regulator with Integrated Power MOSFET
as well as support documentation for the NN30312A Evaluation Board (EVB-NN30312A). Also included are the schematic, the test set-
up, the bill of materials and the Board Layout for the Evaluation Board.
1.1 Overview
NN30312A is a synchronous DCDC 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 voltage.
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 10 A.
1.2 Features
—High-speed response DCDC Step Down Regulator circuit that employs the hysteretic control system
—Integrated Two 9mΩ (Typ) MOSFETs for high efficiency
—Switchable FCCM (continuous) / SKIP (discontinuous) mode
—Input Voltage Range: 4.5V (TBD)~ 30V (TBD)
—Output Voltage Range: 0.75V (TBD) ~ 5.5V (TBD)
—Built-in 0.6V±1% (TBD) Reference Voltage
—Selectable Switching Frequency 250kHz / 750kHz / 1250kHz
—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.
Evaluation Board
EVB-NN30312A
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
— 40pin Plastic Quad Flat Non-leaded Package Heat Slug Down (QFN Type)
1.5 Type
—Multichip IC
Note: The parameters above is subject to change without notice for improvement.
2012-04-17
Revised
User's Guide
for Evaluation Board
Tentative
Table 1. Input Voltage and Output Current Summary
Input Voltage range
PVIN, AVIN = 4.5V(TBD) to 30V (TBD) *1
V-EN = 1.5V to 5V
*1 : PVIN pin and AVIN pin are normally connected on Evaluation Board by 0 ohm resister (R-AVIN).
(Size : 6 × 6 mm, 0.5 mm pitch)
EVB-NN30312A
Total Pages
14
Output Current Range
0A to 10A
Industrial Devices Company, Panasonic Corporation
Page
3
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