Microchip Technology DN2470, Руководство пользователя

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DN2470 BASED LINEAR REGULATOR
INPUT VOLTAGE RANGE EXTENDER
EVALUATION BOARD USER’S GUIDE
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2016 Microchip Technology Inc. DS50002464A-page 10
Chapter 1. Product Overview
1.1 INTRODUCTION
This chapter provides an overview of the DN2470 Based Linear Regulator Input
Voltage Range Extender Evaluation Board and covers the following topics:
• DN2470 Device Overview
• What is the DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board?
• What the DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board Kit Contains
1.2 DN2470 DEVICE OVERVIEW
The DN2470 is a low-threshold depletion-mode (normally-on) vertical FET. Vertical
DMOS FETs are suited for a wide range of switching and amplifying applications where
high breakdown voltage, high input impedance, low input capacitance and fast
switching speeds are required.
The DN2470 has a 700V voltage breakdown with a 42 ohms drain-to-source On-state
resistance and 500 mA saturated drain-to-source current when operating over typical
conditions. The device is packaged in a TO-252 (D-PAK) and it is designed to operate
in a temperature range of -55°C to +150°C (refer to the DN2470 data sheet for more
information).
1.3 WHAT IS THE DN2470 BASED LINEAR REGULATOR INPUT VOLTAGE
RANGE EXTENDER EVALUATION BOARD?
The DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
presents the universal off-line linear regulation using the 700V depletion-mode FET
DN2470. The board features off-line regulation using three different selectable LDOs:
MCP1754, MCP1755 and MCP1790, offered in various package options. The
evaluation board operates with 50 Hz 230 VAC or 60 Hz 120 VAC AC lines and
sources 10 mA typical output current (LDO’s output current).