LTC2928 多通道电源排序器和监控器

The LTC2928 is a four channel cascadable power supply sequencer and high accuracy supervisor. Sequencing thresholds, order and timing are conﬁgured with just a few external components, negating the need for PC board layout or software changes during system development. Multiple LTC2928s may be easily connected to sequence an unlimited number of power supplies.

Sequence outputs control supply enable pins or N-channel pass gates. Precision input comparators with individual outputs monitor power supply voltages to 1.5% accuracy. Supervisory functions include undervoltage and overvoltage monitoring and reporting as well as μP reset generation. RST may be forced high to complement margin testing.

Application faults, whether internally or externally generated, can shutdown all controlled supplies. The type and source of faults are reported for diagnosis. Individual channel controls are available to independently exercise enable outputs and supervisory functions.

A high voltage input allows the LTC2928 to be powered from voltages as high as 16.5V. A buffered reference output permits single negative power supply sequencing and monitoring operations

产品特点 Features

Easily Conﬁgure Power Management without Software
Controls Up to Four Supplies per Device
Cascades for Additional Supplies
Staged Supply Sequencing with Adjustable Time Positions
Fault Event Reporting with Diagnostics
Selectable System Shutdown on Fault
1.5% Undervoltage Monitor Accuracy
Overvoltage and/or Fault Indication
Conﬁgurable Undervoltage and Overvoltage Thresholds
Charge Pumped Enable Pins Drive N-Channel MOSFETs
Operates from 2.9V to 16.5V
5mm × 7mm 38-lead QFN and 36-lead SSOP Packages

参数

应用

Network/Telecom Infrastructure
Sequencing for Multiple I/O and Core Voltages
Power Management

典型应用图

LTC2928 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC2928CG	SSOP	36	C	$5.79	$3.95
LTC2928CG#PBF	SSOP	36	C	$5.79	$3.95
LTC2928CG#TR	SSOP	36	C		$4.01
LTC2928CG#TRPBF	SSOP	36	C		$4.01
LTC2928CUHF	QFN	38	C	$5.79	$3.95
LTC2928CUHF#PBF	QFN	38	C	$5.79	$3.95
LTC2928CUHF#TR	QFN	38	C		$4.01
LTC2928CUHF#TRPBF	QFN	38	C		$4.01
LTC2928IG	SSOP	36	I	$6.94	$4.74
LTC2928IG#PBF	SSOP	36	I	$6.94	$4.74
LTC2928IG#TR	SSOP	36	I		$4.80
LTC2928IG#TRPBF	SSOP	36	I		$4.80
LTC2928IUHF	QFN	38	I	$6.94	$4.74
LTC2928IUHF#PBF	QFN	38	I	$6.94	$4.74
LTC2928IUHF#TR	QFN	38	I		$4.80
LTC2928IUHF#TRPBF	QFN	38	I		$4.80

LTC2928 数据手册及相关资料下载

数据手册(英文) : LTC2928 - Multichannel Power Supply Sequencer and SupervisorPDF
设计要点 (英文) : DN401 - Power Supply Sequencing Made Simple.PDF
设计要点 (中文) : DN421 - 一种给热插拔板卡增添辅助控制功能的简易方法.PDF
可靠性数据 : R413 Reliability Data .PDF
可靠性数据 : R421 Reliability Data .PDF
产品选型卡 : High Voltage Surge Stoppers.PDF
产品选型卡 : Voltage Monitors & Supervisors Quick Guide.PDF