The JTMA7083 is a 5A, synchronous, step-down converter with

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 JTMA7083 is a 5A, synchronous, step-down converter with integrated 50mΩ P-channel power MOSFET and 20mΩ N-channel power MOSFET. The device, with cur-rent-mode control scheme, can convert 4.5~26V input volt-
age to the output voltage adjustable from 0.8 to 90% VIN to provide excellent output voltage regulation.
The JTMA7083 regulates the output voltage in an auto-matic PSM/PWM mode operation, depending on the out-put current, for high efficiency operation over light to full load current. The JTMA7083 is also equipped with power-
on-reset, soft-start, and whole protections (including over- voltage, under-voltage, over-temperature, and current-limit) in a single package. In shutdown mode, the supply current drops below 5µA.This device, available in 28-pin TQFN5x6 package, pro-vides a very compact system solution with minimal exter-
nal components and good thermal conductance.
二.产品特点(Features)
Wide Input Voltage from 4.5V to 26V
Output Current Up to 5A
Adjustable Output Voltage from 0.8V to 90%VIN
- 0.8V Reference Voltage
- ±2.5% System Accuracy
Integrated 50mΩ P-Channel Power MOSFET and
20mΩ N-Channel Power MOSFET
High Efficiency up to 95%
Current-Mode Operation
- Stable with Ceramic Output Capacitors
- Fast Transient Response
Power-On-Reset Monitoring
Fixed 380kHz Switching Frequency in PWM Mode
Automatic Pulse-Skipping Mode (PSM)/PWM
Mode Operation
Built-in Digital Soft-Start
Output Current-Limit Protection with Frequency
Foldback
·   70% Under-Voltage Protection
·   Over-Temperature Protection
·   118% Over-Voltage Protection
·   <5µA Quiescent Current During Shutdown
·   Thermal-Enhanced TQFN5x6-28 Package
·   Pb-Free Available as an Option
·   Lead Free and Green Devices Available
(RoHS Compliant)
三,应用范围 (Applications)

LCD Monitor / TV
SetTop Box
Portable DVD
Wireless LAN
ADSL, Switch HUB
Notebook Computer
Step-Down Converters Requiring High Efficiency
and 5A Output Current

四.下载产品资料PDF文档

JTMA7083

五,产品封装图 (Package)

六.电路原理图