The JTMA8700, two-phase PWM control IC, provides a precision

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 JTMA8700, two-phase PWM control IC, provides a precision voltage regulation system for advanced graphic card and motherboard applications.
The integration of power MOSFET drivers into the controller IC and reduces
the number of external parts for a cost and space saving power management solution.
The JTMA8700 uses a voltage-mode PWM architecture,operating with
adjust frequency from 100kHz to 800kHz.The device uses the voltage across
the DCRs of the inductors for current sensing achieves high efficiency. The
device integrates adjustable load line voltage positioning (droop) and adopts low side RDS_ON for channel-cur-rent balance.
The automatic phase reduction and over-current protection are accomplished through continuous inductor DCRs current sensing.The JTMA8700 also implement a one-bit VID control operation in which the feedback voltage is regulated and
tracks external input reference voltage.This controller protection features include over temperature(OTP), over-voltage(OVP), under-voltage(UVP) and over-current protections (OCP).The device also provides a power-on-reset function and
a programmable soft-start to prevent wrong operation and limit the input surge current during power-on or start-up
The JTMA8700 is available in QFN4x4-24 packages.

二.产品特点(Features)
1.)Voltage-Mode Operation with Current Sharing
2.)Operate with 4.5V~13.2V Supply Voltage
3.)Support Single and Two-Phase Operations
4.)+2% Reference Voltage Accuracy Over Temperature
5.)Loss-Less Inductor DCR Current Sensing
6.)Adjustable Over Current Protection use DCR Current Sensing
7.)Programmable PWM Switching Frequency from 100kHz to 800kHz
8.)Dynamic Output Voltage Adjustment Adjustable Soft-start
QFN4x4-24 Package
9.)Halogen and Lead Free Available (RoHS Compliant)

三,应用范围 (Applications)
VGA
Mother Board

四.下载产品资料PDF文档

JTMA8700

五, (责任编辑：oumao18)