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1
FEATURES
DESCRIPTION
APPLICATIONS
RESET
GND
MR
6
5
4
V
DD
SENSE
C
T
1
2
3
DRVPACKAGE
2mmx2mmQFN
(TOPVIEW)
Power
PAD
DBVPACKAGE
SOT23
(TOPVIEW)
V
DD
SENSE
C
T
RESET
GND
MR
1
2
3
6
5
4
1.2V
3.3V
TPS3808G12
TPS3808G33
DSP
SENSE
V
DD
V
DD
SENSE
V
I/O
V
CORE
GPIO
GND
RESET
MR
C
T
C
T
RESET
TypicalApplicationCircuit
www.ti.com .......................................................................................................................................................... SBVS050J – MAY 2004 – REVISED AUGUST 2008
Low Quiescent Current, Programmable-Delay
Supervisory Circuit
23
Power-On Reset Generator with Adjustable
The
TPS3808xxx
family
of
microprocessor
Delay Time: 1.25ms to 10s
supervisory circuits monitor system voltages from
0.4V to 5.0V, asserting an open-drain RESET signal
Very Low Quiescent Current: 2.4A typ
when the SENSE voltage drops below a preset
High Threshold Accuracy: 0.5% typ
threshold or when the manual reset (MR) pin drops to
Fixed Threshold Voltages for Standard Voltage
a logic low. The RESET output remains low for the
Rails from 0.9V to 5V and Adjustable Voltage
user-adjustable delay time after the SENSE voltage
Down to 0.4V Are Available
and manual reset (MR) return above the respective
thresholds.
Manual Reset (MR) Input
The TPS3808 uses a precision reference to achieve
Open-Drain RESET Output
0.5% threshold accuracy for VIT ≤ 3.3V. The reset
Temperature Range: –40°C to +125°C
delay time can be set to 20ms by disconnecting the
Small SOT23 and 2mm × 2mm QFN Packages
CT pin, 300ms by connecting the CT pin to VDD using
a resistor, or can be user-adjusted between 1.25ms
and 10s by connecting the CT pin to an external
capacitor. The TPS3808 has a very low typical
DSP or Microcontroller Applications
quiescent current of 2.4
A so it is well-suited to
Notebook/Desktop Computers
battery-powered applications. It is available in a small
PDAs/Hand-Held Products
SOT23 and an ultra-small 2mm × 2mm QFN
Portable/Battery-Powered Products
PowerPAD package, and is fully specified over a
FPGA/ASIC Applications
temperature range of –40°C to +125°C (TJ).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
PowerPAD is a trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2004–2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS3808G12DBVRG4 | 功能描述:監(jiān)控電路 Programmable-Delay Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3808G12DBVT | 功能描述:監(jiān)控電路 Programmable-Delay Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3808G12DBVT | 制造商:Texas Instruments 功能描述:IC VOLT SUPERVISOR 1.2V SOT-23-6 制造商:Texas Instruments 功能描述:IC, VOLT SUPERVISOR 1.2V SOT-23-6 制造商:Texas Instruments 功能描述:IC, VOLT SUPERVISOR 1.2V SOT-23-6; Threshold Voltage:1.12V; No. of Supervisors / Monitors:1; Supply Voltage Min:1.7V; Supply Voltage Max:6.5V; Reset Type:Manual, Active-Low; Digital IC Case Style:SOT-23; No. of Pins:6; Supply ;RoHS Compliant: Yes |
| TPS3808G12DBVTG4 | 功能描述:監(jiān)控電路 Programmable-Delay Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3808G12DRVR | 功能描述:監(jiān)控電路 Programmable-Delay Supervisory RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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