The JTM1548B is a constant frequency, 6-pin SOT23 current mo

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 JTM1548B is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small,low power applications. The JTM1548B switches at1.2MHz and allows the use of tiny, low costcapacitors and inductors 2mm or less in height.Internal soft-start results in small inrush current and extends battery life.
     The JTM1548B features automatic shifting to pulsefrequency modulation mode at light loads. The
    JTM1548B includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload. The
   JTM1548B is available in a small 6-pin SOT-23 package.

二.产品特点(Features)
Integrated 80mΩ POWer MOSFET
· 2V to 24V Input Voltage
· 1.2MHz Fixed Switching Frequency
· Internal 4A Switch Current Limit
· Adjustable Output Voltage
· Internal Compensation
· Up to 28V Output Voltage
· Automatic Pulse Frequency Modulation
Mode at Light Loads
· up to 97% Efficiency
· Available in a 6-Pin SOT23-6 Package

三,应用范围 (Applications)
Battery-Powered Equipment
· Set-Top Boxed
· LCD Bais Supply
· DSL and Cable Modems and Routers
· Networking cards powered from PCI or PCI express slots

四.下载产品资料PDF文档

JTM1548

五,产品封装图 (Package)

PIN	NAME	FUNCTION
1	SW	Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power inductor and output rectifier to SW. SW can swing between GND and 28V.
2	GND	Ground Pin
3	FB	Feedback Input. The FB voltage is 0.6V. Connect a resistor divider to FB.
4	EN	Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input turns it off. When not used, connect EN to the input supply for automatic startup.
5	IN	Input Supply Pin. Must be locally bypassed.
6	NC	NC

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