參數(shù)資料
型號： LTC2925
廠商： Linear Technology Corporation
英文描述： Octal Bus Transceiver With 3-State Outputs 20-TSSOP -40 to 85
中文描述： 四路電源排序器
文件頁數(shù)： 1/16頁
文件大?。?/td> 190K
代理商： LTC2925
LTC2924
1
2924f
■
Fully Sequence Four Supplies
– Six with Minimal External Circuitry
■
Cascadable for Additional Supplies
■
Power Off in Reverse Order or Simultaneously
■
Charge Pump Drives External MOSFETs
■
Drives Power Supply Shutdown Pins with No
External Pull-Up Resistors
■
Sequence and Monitor Two or More Supplies
■
10
μ
A Output Current Allows Soft-Starting of Supplies
■
Done Indicator for Both Power On and Power Off
■
Adjustable Time Delay Between Power Supplies
■
Power Good Timer
■
Power Supply Voltage Monitoring and Power
Sequence Error Detection and Reporting
■
Available in a 16-Lead Narrow SSOP Package
APPLICATIU
Quad Power Supply
Sequencer
DESCRIPTIOU
■
Sequenced Power Supplies for ASICs with Multiple
I/O and Core Voltages
■
Latch-Up Prevention in Systems with Multiple Power
Supplies
The LTC
2924 is a power supply sequencer designed for
use with external N-channel MOSFETs or power supplies
with shutdown pins. Four power supplies can be fully
sequenced by a single LTC2924 and up to five supplies can
be sequenced to a sixth master supply. The LTC2924
requires a minimum of external components, using only
two feedback resistors per sequenced power supply and
a single resistor to set hysteresis.
An internally regulated charge pump provides gate drive
voltages for external logic and sub-logic-level MOSFETs.
Adding a single capacitor enables an adjustable time delay
between power supplies during both Power On and Power
Off sequencing. A second capacitor can be added to enable
a power good timer for detecting the failure of any power
supply to turn on within the selected time. Errors in power
supply sequencing and the control input are detected and
reported at the FAULT output. The LTC2924 features pre-
cision input comparators which can provide 1% accuracy
in monitoring power supply voltages.
Multiple LTC2924s may be easily cascaded to sequence a
virtually unlimited number of power supplies.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FEATURES
TYPICAL APPLICATIO
U
OUT1
OUT2
OUT3
OUT4
ON
DONE
FAULT
TMR
PGT
IN1
IN2
IN3
IN4
HYS/CFG
LTC2924
V
CC
GND
150nF
2924 TA02a
SYSTEM
CONTROLLER
150nF
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
11.8k
52.3k
0.1
μ
F
Q4
Q3
Q2
Q1
45.3k
6.04k
1.62k
7.68k
1.69k
Q1-Q4: IRL3714S
ALL RESISTORS 1%
3.09k
V
ON
= 0.93V
V
OFF
= 0.91V
V
ON
= 2.79V
V
OFF
= 2.73V
V
ON
= 4.21V
V
OFF
= 3.76V
V
ON
= 3.32V
V
OFF
= 2.80V
49.9k
10k
5V
EARLY
10k
5V
3V
1V
Series MOSFET Power Supply Sequencer
2V/DIV
5V
3.3V
1V
DONE
ON
TMR
10V/DIV
2V/DIV
2V/DIV
25ms/DIV
2924 TA02b
2V/DIV
5V
3.3V
1V
DONE
ON
TMR
10V/DIV
2V/DIV
2V/DIV
25ms/DIV
2924 TA02c
Power-Down Sequence
Power-Up Sequence
相關PDF資料
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相關代理商/技術參數(shù)
參數(shù)描述
LTC2925CGN 功能描述:IC PWR SUPPLY CONTROLLER 24SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
LTC2925CGN#PBF 功能描述:IC PWR SUPPLY CONTROLLER 24SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
LTC2925CGN#TR 功能描述:IC PWR SUPPLY CONTROLLER 24SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
LTC2925CGN#TRPBF 功能描述:IC PWR SUPPLY CONTROLLER 24SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
LTC2925CUF 功能描述:IC POWER SUPPLY CONTROLLER 24QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
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