The JTMA8726 JTMA8727 JTMA8727L is a voltage mode, fixed 30

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 JTMA8726 JTMA8727 JTMA8727L is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. The JTMA8726 allows wide input voltage that is either a single 5~12V or two supply voltage(s) for various applications. A 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 0.6V temperature-com-pensated reference voltage with high accuracy is de-signed to meet the requirement of low output voltage applications. The JTMA8726 provides excellent output volt-
age regulations against load current variation. JTMA8726 is built in remote sense function for applications that re-quire remote sense. (TDFN-10 3mmx3mm Package Only)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 cur-rent sensing resistor that features high efficiency and low cost. In addition, the JTMA8726 also integrates excel-lent protection functions. The over-voltage protection (OVP) , under-voltage protection (UVP). OVP circuit which moni-tors the FB voltage to prevent the PWM output from over
voltage, and UVP circuit which monitors the FB voltage to prevent the PWM output from under voltage or short circuit.
The JTMA8726 is available in TDFN3x3-10 packages

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
- 0.6V Internal Reference
- ±0.6% 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.）50% Under-Voltage Protection
10.）125% Over-Voltage Protection
11.）Adjustable Over-Current Protection Threshold
- Using the RDS(ON) of Low-Side MOSFET
12.）Shutdown Control by COMP
13.）Power Good Monitoring (TDFN-10 3mmx3mm Package Only)
14.）Remote Feedback Sense for Excellent Output
15.）Voltage (TDFN-10 3mmx3mm Package Only) TDFN3x3-10 Package
16.）Lead Free and Green Devices Available

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

JTMA8726

JTMA8727