The JTM6297,JTM6298,JTM6299 regulator is a wide input range,

1.产品概述         2.产品特点
3.应用范围    4.产品封装图
5.电路原理图             6.产品PCB
7.产品BOM 8.产品PDF文档
9.功能概述 10.相关产品

一,产品概述(General Description)
The JTM6297 regulator is a wide input range,current mode, DC/DC converter which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. The JTM6297 built in N-
channel power MOSFET and fixed frequency oscillator, current-mode architecture results in stable operation over a wide range of supply
and output voltages.
The JTM6297 regulator is special design for portable electronic equipment.

二.产品特点(Features)

Wide 3.6V to 24V Input Voltage Range
Positive or Negative Output Voltage Programming with a Single Feedback Pin
Current Mode Control Provides Excellent
Transient Response 1.25V reference adjustable version
Fixed 400KHz Switching Frequency
Maximum 2A Switching Current
SW PIN Built in Over Voltage Protection
Excellent line and load regulation
EN PIN TTL shutdown capability
Internal Optimize Power MOSFET
High efficiency up to 90%
Built in Frequency Compensation
Built in Soft-Start Function
Built in Thermal Shutdown Function
Built in Current Limit Function
Available in SOIC-8 package

三,应用范围 (Applications)

Automotive and Industrial Boost/Buck-Boost / Inverting Convertersn
Portable Electronic Equipment

四,产品封装图 (Package)

Pin Number	Pin Name	Description
1	EN	Enable Pin. Drive EN pin low to turn off the device, drive it high to turn it on. Floating is default high.
2	VIN	Supply Voltage Input Pin. HM6297 operates from a 3.6V to 24V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.
3	FB	Feedback Pin (FB). The feedback threshold voltage is 1.25V.
4	NC	No Connected.
5,6	SW	Power Switch Output Pin (SW). Output is the switch node that supplies power to the output.
7,8	GND	Ground Pin.

五,电路原理图

六, 产品PCB
PCB 板布局建议：
（1）流大电流的线要粗，短，不拐弯。
（2）7，8 脚（GND），2 脚（VIN）线要粗，短线，不拐弯，且输入电解电容 CIN 和 105 C1 陶瓷电容紧挨第 2 脚（VIN）和 7，8 脚(GND)。（主要是为
了减小输入电源布线寄生的电感，电阻产生的高压开关毛刺干扰）
（3）5，6 脚（SW）输出线要粗，短线，不拐弯，电感和续流二极管要紧挨第
5，6 脚（SW）输出端。
（4）3 脚（FB）走线要接到输出滤波电容 C2,COUT 之后, PCB 布线远离 L1,D1,
避免噪声干扰。

七.产品BOM
(略)
八.产品PDF文档

JTM6297

九,功能概述

十,相关产品

型号	工作模式	工作电压	输出	输出电压	输出电压	内置MOS	效率	静态	工作频率	封装
		范围	电压	形式	精度	最大输出		电流
						电流
JTM6297	PWM	3.6V-26V	最大60V	可调输出	±2%	2A	90%	70uA	400KHz	SOP-8
JTM6298	PWM	3.6V-36V	最大60V	可调输出	±2%	3A	92%	70uA	400KHz	TO252-5L
JTM6299	PWM	5V-45V	最大60V	可调输出	±2%	5A	94%	70uA	220KHz	TO263-5L