参数资料
型号: LTC2928CUHF#TRPBF
厂商: Linear Technology
文件页数: 14/32页
文件大小: 0K
描述: IC PWR SUPPLY SEQUENCER 38-QFN
标准包装: 2,500
类型: 序列发生器
监视电压数目: 4
复位: 低有效
复位超时: 最小为 5 ms
电压 - 阀值: 可调节/可选择
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 38-WFQFN 裸露焊盘
供应商设备封装: 38-QFN(5x7)
包装: 带卷 (TR)
LTC2928
OPERATIO
good timer starts with the first enable output pulling low
and is cleared when the last supply monitor input crosses
its sequence-down threshold. A sequence-down fault pulls
FLT and all enable outputs low. Use a single capacitor from
PTMR to ground to select the power good time. To disable
the power good timer, tie PTMR to ground.
All comparator outputs pull low at the start of the
sequence-down phase (ON low). If a sequence-down fault
occurs, use the fault report capability to determine which
Table 1. Input Polarity Selection
supply failed to meet threshold (or other source of fault).
Force all supplies down in an un-sequenced manner by
pulling FLT low (external fault). For more details refer to
the Applications Information and discussion on system
faults later in this document.
After the system has clocked through “time position 1”,
the last LTC2928 (defined by a 2.4k to 5.1k pull-up resis-
tor on DONE ) releases the pull down on DONE and DONE
pulls high.
V1
+ ADJ (0.5V)
– ADJ (0V)
V2
+ ADJ (0.5V)
+ ADJ (0.5V)
V3
+ ADJ (0.5V)
+ ADJ (0.5V)
V4
+ ADJ (0.5V)
+ ADJ (0.5V)
VSEL
GND
V CC
Table 2. Master/Slave Configuration Pin s
Master
Slave
First Not First
Cascade Position Cascade Position
RST Pulls FLT
RST Does not
Pull FLT
No Shutdown
Debug Mode*
MS1
MS2
GND
GND
GND
Open
Open
Open
GND
Open
V CC
GND
Open
V CC
V CC
V CC
V CC
GND
Open
V CC
* No shutdown debug mode. In this mode, any internal or external fault will halt the system with full fault reporting but all enabled supplies remain enabled.
Table 3. Sequence Time Position Resistors (1%)
Table 4. Sequencing Threshold Selection
(% of 0.5V for ADJ, % of REF for –ADJ)
Position Number
1
2
3
4
5
6
7
8
RT (k ? )
95.3
42.2
24.3
15.0
9.53
6.04
3.40
1.50
Sequence-Up (%)
100
100
100
100
67
67
67
67
33
Sequence-Down (%)
100
67
33
10
100
67
33
10
100
SQT1
V CC
Open
Open
Open
V CC
GND
GND
GND
V CC
SQT2
V CC
V CC
Open
GND
Open
V CC
Open
GND
GND
2928f
14
相关PDF资料
PDF描述
UPM1E122MHD CAP ALUM 1200UF 25V 20% RADIAL
RMC18DREF CONN EDGECARD 36POS .100 EYELET
ADM8695ARWZ IC SUPERVSR MPU 4.65V ADJ 16SOIC
LTC2913CMS-2#PBF IC VOLT MONITOR DUAL 10-MSOP
MIC2184YQS TR IC REG CTRLR BUCK PWM CM 16-QSOP
相关代理商/技术参数
参数描述
LTC2928IG 制造商:Linear Technology 功能描述:Volt Supervisor Sequencer 36-Pin SSOP
LTC2928IG#PBF 功能描述:IC PWR SUPPLY SEQUENCER 36SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 其它有关文件:STM6905 View All Specifications 标准包装:1 系列:- 类型:多压监控器 监视电压数目:5 输出:开路漏极或开路集电极 复位:低有效 复位超时:最小为 140 ms 电压 - 阀值:2.188V,2.955V,可调,可调,可调 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP,8-MSOP(0.118",3.00mm 宽) 供应商设备封装:8-TSSOP 包装:Digi-Reel® 产品目录页面:1197 (CN2011-ZH PDF) 其它名称:497-8728-6
LTC2928IG#TRPBF 功能描述:IC PWR SUPPLY SEQUENCER 36SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP(0.059",1.50mm 宽)5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT
LTC2928IUHF 制造商:Linear Technology 功能描述:Volt Supervisor Sequencer 38-Pin QFN EP
LTC2928IUHF#PBF 功能描述:IC PWR SUPPLY SEQUENCER 38-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 其它有关文件:STM6905 View All Specifications 标准包装:1 系列:- 类型:多压监控器 监视电压数目:5 输出:开路漏极或开路集电极 复位:低有效 复位超时:最小为 140 ms 电压 - 阀值:2.188V,2.955V,可调,可调,可调 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP,8-MSOP(0.118",3.00mm 宽) 供应商设备封装:8-TSSOP 包装:Digi-Reel® 产品目录页面:1197 (CN2011-ZH PDF) 其它名称:497-8728-6