The JTMA8723 APW8724 APW8725 APW8725A is a voltage mode, fix

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 JTMA8723 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. The JTMA8723 allows wide input voltage that is either a single 5V~12V or two supply voltage(s) for various applications. The
power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. A built-in soft-start circuit prevents the output voltages from overshoot as well as limits the input current. An internal 0.8V tempera-
ture-compensated reference voltage with high accuracy is designed to meet the requirement of low output volt-age applications. The JTMA8723 provides excellent out-put voltage regulations against load current variation.JTMA8723 is built in reference voltage offset function for applications that require adjusting supply voltage.The controller’s over-current protection monitors the out-put current by using the voltage drop across the RDS(ON) of low-side MOSFET, eliminating the need for a current sens-ing resistor that features high efficiency and low cost. In
addition, the JTMA8723 also integrates excellent protec-tion functions, The over-voltage protection (OVP) , under-voltage protection (UVP) and over-temperature protec-tion (OTP). OVP circuit which monitors the FB voltage to prevent the PWM output from over voltage, and UVP cir-cuit which monitors the FB voltage to prevent the PWM output from under voltage or short circuit. OTP circuit which

monitors the junction temperature to prevent over-heat-ing conditions.
The JTMA8723 is available in TDFN3x3-10 package

二.产品特点(Features)
1.)Wide 5V to 12V Supply Voltage
2.)Power-On-Reset Monitoring on VCC
3.)Excellent Output Voltage Regulations
- 0.8V Internal Reference
- ±1% Over Temperature Range
4.)Integrated Soft-Start
5.)Voltage Mode PWM Operation with External Compensation
6.)Up to 90% Duty Ratio for Fast Transient Response
7.)Constant Switching Frequency
- 300kHz ±10%
8.)Integrated Bootstrap Forward P-CH MOSFET
9.)Drive Dual Low Cost N-MOSFETs with Adaptive Dead Time Control
10.)50% Under-Voltage Protection
11.)125% Over-Voltage Protection
12.)Adjustable Over-Current Protection Threshold
- Using the RDS(ON) of Low-Side MOSFET
13.)Shutdown Control by COMP
14.)Power Good Monitoring
15.)TDFN3x3-10 Package
16.)Lead Free and Green Devices Available (RoHS Compliant)

三,应用范围 (Applications)
Graphic Cards
DSL, Switch HUB
Wireless Lan
Notebook Computer
Mother Board
LCD Monitor/TV

四.下载产品资料PDF文档

JTMA8723

JTMA8724