The JTMA7116 integrates Dual PWM buck controllers and an int

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 JTMA7116 integrates Dual PWM buck controllers and an internal
linear regulator for DDR memory and MCH power solution. The two synchronous PWM buck control-lers drive four N-channel MOSFETs for DDR memory sup-
ply voltage (VDDQ) and MCH regulator. The internal regu-lator is designed to track at the half of the reference volt-age with sourcing and sinking current for DDR memory termination regulator (VTT).
The JTMA7116 uses the latched BUF_Cut signal and the POR of the BOOT to comply with ACPI power sequencing specifications. The two PWM regulators also provide POKsignals to indicate that the regulators are good. The de-vice also has the phase shift function between the two PWM controllers. The protection functions of the two PWM controllers include over-current protection, under-voltage protection, and external soft-start function. The VTT regu-lator provides 2A sinking and sourcing current-limit func-tion and also has thermal shutdown protection.
The TSSOP-24P package with a copper pad provides excellent thermal impedance is available.
二.产品特点(Features)
1.）Provide Synchronous Rectified Buck PWM Controllers for VDDQ and VMCH
2.）Integrated Power FETs with VTT Regulator
Source/Sink up to 2.0A
3.）Drive Low Cost N-Channel Power MOSFETs
4.）Internal 0.8V Reference Voltage for Adjustable
VDDQ and VMCH
5.）Thermal Shutdown
6.）VTT Tracks at Half the Reference Voltage
7.）Fixed Switching Frequency of 250kHz for VDDQ
and VMCH
8.）Over-Current Protection and Under-Voltage
Protection for VDDQ and VMCH
9.）Fully Complies with ACPI Power Sequencing
Specifications
10.）180 degrees Phase Shift between VDDQ and VMCH
11.）Power-OK Function for VDDQ and VMCH
12.）Fast Transient Response
Maximum Duty Cycle 90%
High-Bandwidth Error Amplifier
13.）Simple Single-Loop Control Design
Voltage Mode PWM Control
External Compensation
14.）External Soft-Start for VDDQ and VMCH
15.）Shutdown Function for VDDQ/VTT and VMCH
16.）Thermally Enhanced TSSOP-24P Package
17.）Lead Free and Green Devices Available (RoHS Compliant)

三,应用范围 (Applications)
DDR Memory and MCH Power Supply

四.下载产品资料PDF文档

JTMA7116