The JTMA7037,JTMA7057series are designed to provide a low co

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 JTMA7037 series are designed to provide a low cost synchronous
Buck regulator for on-board DC to DC con-verter applications. The JTMA7037
series together with dual N-channel MOSFETs such as APM7313, provide a
low cost solution for such applications. Each device fea-tures an internal
200/400kHz oscillator, Power-On-Reset (POR) for both VCC and VC supplies,
an external pro-grammable soft-start function as well as output under-
voltage detection that latches off the device when an out-put short is detected.

二.产品特点(Features)
1.)Operating with Single 5V or 12V Input
2.)Drives N-Channel MOSFETs
3.)Simple Single-Loop Control Design
Voltage-Mode PWM Control
Full 0% to 100% Duty Ratio
Fast Transient Response
4.)±2% Output Voltage Accuracy Over Temperature
5.)Under-Voltage Protection for Output
6.)200/400kHz Constant Frequency Operation
200kHz for JTMA7037B
400kHz for JTMA7037A
7.)Small size, 8-PIN Package (SOIC or TSSOP)
8.)Lead Free and Green Devices Available (RoHS Compliant)
三,应用范围 (Applications)
Graphics Cards
DDR Memory Power Supply
DDR Memory Termination Voltage
Low-Voltage Distributed Power Supplies

四.下载产品资料PDF文档

JTM7037

JTMA7057

五,产品封装图 (Package)

FB (Pin 1)
Connect this pin to the output (VOUT) of the PWM con-verter via an external resistor divider to provide a voltage
feedback path for the converter. The output voltage set by the resistor divider is determined using the following for-
where ROUT is the resistor connected from VOUT to FB, and RGND is the resistor connected from FB to ground.
The voltage at this pin is also monitored for Under-Volt-age protection.

VCC (Pin 2)
Connect this pin to input voltage from 5V to 20V. This pin provides the bias for the control circuitry and the low-side (责任编辑：oumao18)