The JTMA7063 JTMA7064 integrates PWM and linear controller,

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 JTMA7063 integrates PWM and linear controller, as well as the monitoring and protection functions into a single package. The synchronous
PWM controller which drives dual N-channel MOSFETs, which provides one
controlled power outputs with under-voltage and over-current protections. Linear controller drives an external N-channel MOSFET with under-voltage protection.
JTMA7063 provides excellent regulation for output load variation. An internal 0.8V temperature-compensated ref-erence voltage is designed to meet the arious low out-put voltage applications. JTMA7063 includes a 250kHz free-running triangle-wave oscillator that is adjustable from 70kHz to 800kHz.A power-on-reset (POR) circuit limits the VCC minimum opearting supply voltage to assure the controller working well. Over current protection is achieved by monitoring
the voltage drop across the low side MOSFET, eliminat-ing the need for a current sensing resistor and short cir-cuit condition is detected through the FB pin. The over-current protection triggers the soft-start function until the fault events be removed, but Under-voltage protection will shutdown IC directly.Pull the COMP pin below 0.4V will shutdown the controller,and both gate drive signals will be low

二.产品特点(Features)
1.）Provide Two Regulated Voltages
- Synchronous Rectified Buck PWM Controller
- Linear Controller
2.）Fast Transient Response
- 0~85% Duty Ratio
3.）Excellent Output Voltage Regulation
- 0.8V Internal Reference
- ±1% Over Line Voltage and Temperature
4.）Over Current Protection
- Sense Low-Side MOSFET’s RDS(ON)
5.）Under Voltage Lockout
6.）Small Converter Size
- 250kHz Free-Running Oscillator
- Programmable From 70kHz to 800kHz
7.）14-Lead SOIC Package
8.）Lead Free and Green Devices Available
(RoHS Compliant)
三,应用范围 (Applications)
Graphic Cards
Memory Power Supplies
DSL or Cable MODEMs
Set Top Boxes
Low-Voltage Distributed Power Supplies

四.下载产品资料PDF文档

JTMA7063