LP3470IM5-2.93/NOPB National Semiconductor, LP3470IM5-2.93/NOPB Datasheet

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LP3470IM5-2.93/NOPB

Manufacturer Part Number
LP3470IM5-2.93/NOPB
Description
IC CIRCUIT RESET PWR-ON SOT23-5
Manufacturer
National Semiconductor
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of LP3470IM5-2.93/NOPB

Number Of Voltages Monitored
1
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
1 ms Minimum
Voltage - Threshold
2.93V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Processor Reset Type
Active Low
Supply Voltage Min
0.5V
Peak Reflow Compatible (260 C)
Yes
Output Type
Open Drain
Supply Voltage Max
5.5V
Rohs Compliant
Yes
Voltage Supervisor Type
Voltage Monitor
Number Of Voltage Supervisors
1
Monitored Supervisor Voltage
2.93
Reset Threshold Voltage (min)
2.4V
Reset Threshold Voltage (max)
5V
Operating Supply Voltage (min)
0.5V
Operating Supply Voltage (max)
5.5V
Power Dissipation
300mW
Package Type
SOT-23
Operating Temperature Classification
Industrial
Operating Temp Range
-40C to 85C
Pin Count
5
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LP3470IM5-2.93/NOPBTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LP3470IM5-2.93/NOPB
Manufacturer:
NS
Quantity:
1 000
Part Number:
LP3470IM5-2.93/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
© 2009 National Semiconductor Corporation
Tiny Power On Reset Circuit
General Description
The LP3470 is a micropower CMOS voltage supervisory cir-
cuit designed to monitor power supplies in microprocessor
(µP) and other digital systems. It provides maximum adjusta-
bility for power-on-reset (POR) and supervisory functions. It
is available in the following six standard reset threshold volt-
age (V
4.38V, and 4.63V. If other voltage options between 2.4V and
5.0V are desired please contact your National Semiconductor
representative.
The LP3470 asserts a reset signal whenever the V
voltage falls below a reset threshold. The reset time-out pe-
riod is adjustable using an external capacitor. Reset remains
asserted for an interval (programmed by an external capaci-
tor) after V
The device is available in the tiny SOT23-5 package.
Pin Configuration and Basic Operating Circuit
RTH
CC
) options: 2.63V, 2.93V, 3.08V, 3.65V, 4.00V,
has risen above the threshold voltage.
See NS Package Number
Pin Configuration
Top View
MF05A
10001602
100016
CC
supply
LP3470
Key Specifications
Features
Applications
±1% Reset Threshold Accuracy Over Temperature
Standard Reset Threshold Voltages: 2.63V, 2.93V, 3.08V,
3.65V, 4.00V, 4.38V, and 4.63V
Custom Reset Threshold Voltages: For other voltages
between 2.4V and 5.0V contact your National
Semiconductor representative
Very Low Quiescent Current (16 µA typical)
Guaranteed Reset valid down to V
Tiny SOT23-5 Package
Open Drain Reset Output
Programmable Reset Timeout Period Using an External
Capacitor
Immune to Short V
Critical µP and µC Power Monitoring
Intelligent Instruments
Computers
Portable/Battery-Powered Equipments
Basic Operating Circuit
CC
Transients
CC
=0.5V
September 3, 2009
www.national.com
10001601

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LP3470IM5-2.93/NOPB Summary of contents

Page 1

... RTH 4.38V, and 4.63V. If other voltage options between 2.4V and 5.0V are desired please contact your National Semiconductor representative. The LP3470 asserts a reset signal whenever the V voltage falls below a reset threshold. The reset time-out pe- riod is adjustable using an external capacitor ...

Page 2

... LP3470IM5X-2.63 2.75 LP3470IM5-2.75 LP3470IM5-2.83 2.83 LP3470IM5X-2.83 LP3470IM5-2.93 2.93 LP3470IM5X-2.93 LP3470IM5-3.08 3.08 LP3470IM5X-3.08 −40°C to +85°C LP3470IM5-3.65 3.65 LP3470IM5X-3.65 LP3470IM5-4.00 4.00 LP3470IM5X-4.00 LP3470IM5-4.38 4.38 LP3470IM5X-4.38 LP3470IM5-4.63 4.63 LP3470IM5X-4.63 4.80 LP3470IM5X-4.8 www.national.com Order Package Number Marking D25B D25B D26B D26B D28B D28B ...

Page 3

... Note 5: Min. and Max. limits in standard typeface are 100% production tested at 25°C. Min. and Max. limits in boldface are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National's Average Outgoing Quality Level (AOQL). Note 6: Factory-trimmed reset thresholds are available increments from 2.4V to 5.0V. Contact your National Semiconductor representative. Note 7: V ...

Page 4

Typical Operating Characteristics I vs Temperature Reset Delay vs Temp CC Normalized V RTH www.national.com T = +25°C, unless otherwise specified. A 10001610 10001613 vs Temp. 10001608 10001611 Normalized t vs ...

Page 5

HYST RTH Pin Descriptions Pin Name 1 SRT Set Reset Time-out Input. Connect a capacitor between this input and ground to select the Reset Time- out period (t floating. 2 GND Ground pin Always connect ...

Page 6

Application Information RESET TIMEOUT PERIOD The Reset Timeout Period ( programmable using an RP external capacitor (C ) connected to pin SRT of LP3470 Ceramic chip capacitor rated at or above 10V is sufficient. The Reset ...

Page 7

Typical Application Circuit 7 10001605 www.national.com ...

Page 8

Physical Dimensions For Ordering Information See Ordering Information Table In This Data Sheet www.national.com inches (millimeters) unless otherwise noted 5-Lead Small Outline Package (M5) NSPackage Number MF05A 8 ...

Page 9

Notes 9 www.national.com ...

Page 10

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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