The JTMA3146 IC combines a Dual synchronous Buck controller

1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品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 JTMA3146 IC combines a Dual synchronous Buck controller, providing a cost-effective,
high performance and flexible solution. The JTMA3146 can configured as 2-independent or
as 2-phase controller. The 2-phase con-figuration is ideal for high current applications. The
JTMA3146 features 180 out of phase operation which re-duces the required input/output
capacitance and results to few number of capacitor quantity. Other key features offered by this
device include two independent program-mable soft starts, programmable switching frequency up
to 500KHz per phase, under voltage lockout function.The current limit is provided by sensing the lower
MOSFET's on-resistance for optimum cost and perfor-mance
二.产品特点(Features)

Dual Synchronous Controller with 180 out-of-phase
Configurable to 2-Independent Outputs or 2-Phase
Single Output
Current Sharing Using Inductor's DCR
Current Limit using MOSFET's RDS(ON)
Hiccup/Latched Current Limit
Latched Over-Voltage Protection
Vcc from 4.5V to 16V Input
Programmable Switching Frequency up to 500KHz
Two Independent Soft-Starts/ Shutdowns
0.8V Precision Reference Voltage Available
Power Good Output
External Frequency Synchronization
Halogen Free Product
三,应用范围 (Applications)

Embedded Computer Systems
Telecom Systems
Point of Load Power Architectures
2-Phase Power Supply
Graphic Card
DDR Memory Applications
四.技术规格书下载（产品PDF）

JTMA3146

五,产品封装图 (Package)

六.电路原理图

七,功能概述

Vcc, VCL Supply Voltage .............................................. -0.5V To 16V
VcH1 and VcH2 Supply Voltage ................................ -0.5V To 25V
PGOOD................. ................................................... -0.5V To 16V
Storage Temperature Range ...................................... -40°C To 125°C
Operating Junction Temperature Range ..................... -40°C To 125°C
八,相关芯片选择指南

Power IC-DDR & Reset
Part Number	Package	Vin(typ)	Vin (max)	Max. Current (A)	Current Limit (A)	Quiescent Current Typ. (uA)
JTMA1210MP	ESOP-8	1.1/1.4/2.5	6	2.5	3	0.05
JTMA1270AMP	ESOP-8	1.5/1.8/2.5	6	2.5	3.2	0.05
JTMA1280AMP	ESOP-8	1.5/1.8/2.5	6	2	2.2	0.05
JTMA6800Y	SOT-26	1.65~5.5
JTMA6800GN15B	DFN-1.5X2-6L	1.65~5.5
JTMA3146O	TSSOP-28
JTMA3048O	TSSOP-16
JTMA3048M	SOP-16

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