The JTM2459,JTM2359 is a wide input range, high-efficiency,

1.产品概述         2.产品特点
3.应用范围       4.下载产品资料PDF文档
5.产品封装图                     6.电路原理图
7.功能概述       8.相关产品

一,产品概述(General Description)
        The JTM2459 is a wide input range, high-efficiency, and highfrequency
DC-to-DC step-down switching regulator,capable of delivering up to 1.5A of
output current. With a fixed switching frequency of 650KHz, this current mode
PWM controlled converter allows the use of small external components, such
as ceramic input and output caps, as well as small inductors.JTM2459 also
employs a proprietary control scheme that switches the device into a power
save mode during light load, thereby extending the range of high efficiency
operation. An OVP function protects the IC itself and its downstream system
against input voltage surges. With this OVP function, the IC can stand off input
voltage as high as 42V, making it an ideal solution for industrial applications such
as smart meters as well as automotive applications.In automotive systems, power
comes from the battery, with its voltage typically between 9V and 24V. Including cold
crank and double battery jump-starts, the minimum inputvoltage may be as low as
4V and the maximum up to 36V,with even higher transient voltages. With these high input
voltages, linear regulators cannot be used for high supply currents without overheating
the regulator. Instead, high efficiency switching regulators such as JTM2459 must be
used to minimize thermal dissipation.
         JTM2459 is available SOT23-6 Packages.

二.产品特点(Features)
1.)Wide Input Operating Range from 4V to 38V
2.)Standoff Input Voltage: 42V
3.)High Efficiency at 12V In 5V Out: Up to 91%:
4.)High Efficiency PFM mode at light load
5.)Capable of Delivering 1.5A
6.)No External Compensation Needed
7.)Current Mode control
8.)Logic Control Shutdown
9.)Thermal shutdown and UVLO
10.)Available in SOT23-6 Package

三,应用范围 (Applications)
Smart Meters
Industrial Applications
Automotive Applications

四.下载产品资料PDF文档

JTM2459

JTM2359

五, (责任编辑：oumao18)