LM26CIM5X-XHA National Semiconductor, LM26CIM5X-XHA Datasheet

LM26CIM5X-XHA

Manufacturer Part Number

LM26CIM5X-XHA

Description

LM26CIM5X-XHAAccurate, Factory Preset Thermostat

Manufacturer

National Semiconductor

Datasheet

1.LM26CIM5X-XHA.pdf (9 pages)

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LM26

SOT-23,

General Description

The LM26 is a precision, single digital-output, low-power

thermostat comprised of an internal reference, DAC, tem-

perature sensor and comparator. Utilizing factory program-

ming, it can be manufactured with different trip points as well

as different digital output functionality. The trip point (T

can be preset at the factory to any temperature in the range

of −55˚C to +110˚C in 1˚C increments. The LM26 has one

digital output (OS/OS/US/US), one digital input (HYST) and

one analog output (V

preset as either open-drain or push-pull. In addition, it can be

factory programmed to be active HIGH or LOW. The digital

output can be factory programmed to indicate an over tem-

perature shutdown event (OS or OS) or an under tempera-

ture shutdown event (US or US). When preset as an over-

temperature shutdown (OS) it will go LOW to indicate that

the die temperature is over the internally preset T

HIGH when the temperature goes below (T

larly, when preprogrammed as an undertemperature shut-

down (US) it will go HIGH to indicate that the temperature is

below T

2˚C or 10˚C and is controlled by the state of the HYST pin. A

to temperature and has a −10.82mV/˚C output slope.

Available parts are detailed in the ordering information. For

other part options, contact a National Semiconductor Dis-

tributor or Sales Representative for information on minimum

order qualification. The LM26 is currently available in a

5-lead SOT-23 package.

Applications

n Microprocessor Thermal Management

n Appliances

LM26CIM5-TPA Simplified Block Diagram and Connection Diagram

TEMP

HYST

analog output provides a voltage that is proportional

and go LOW when the temperature is above

). The typical hysteresis, T

TEMP

3˚C Accurate, Factory Preset Thermostat

please see ordering information or contact National Semiconductor.

). The digital output stage can be

For other trip point and output function availability,

The LM26CIM5-TPA has a fixed trip point of 85˚C.

HYST

DS101323

, can be set to

–T

HYST

). Simi-

and go

)

n Portable Battery Powered Systems

n Fan Control

n Industrial Process Control

n HVAC Systems

n Remote Temperature Sensing

n Electronic System Protection

Features

n Internal comparator with pin programmable 2˚C or 10˚C

n No external components required

n Open Drain or push-pull digital output; supports CMOS

n Internal temperature sensor with V

n V

n Internal voltage reference and DAC for trip-point setting

n Currently available in 5-pin SOT-23 plastic package

n Excellent power supply noise rejection

Key Specifications

hysteresis

logic levels

TEMP

Power Supply Voltage

Power Supply Current

Hysteresis Temperature

output allows after-assembly system testing

Temperature Range

Temperature Trip Point Accuracy

−55˚C to +110˚C

+120˚C

LM26CIM

TEMP

3˚C (max)

4˚C (max)

10132301

2˚C or 10˚C(typ)

output pin

2.7V to 5.5V

www.national.com

40µA(max)

March 2005

20µA(typ)

Related parts for LM26CIM5X-XHA

LM26CIM5X-XHA Summary of contents

Page 1

... TEMP to temperature and has a −10.82mV/˚C output slope. Available parts are detailed in the ordering information. For other part options, contact a National Semiconductor Dis- tributor or Sales Representative for information on minimum order qualification. The LM26 is currently available in a 5-lead SOT-23 package. ...

Page 2

... Units in Tape & Reel LM26CIM5-NPA LM26CIM5X-NPA LM26CIM5-PHA LM26CIM5X-PHA LM26CIM5-RPA LM26CIM5X-RPA LM26CIM5-SHA LM26CIM5X-SHA LM26CIM5-SPA LM26CIM5X-SPA LM26CIM5-TPA LM26CIM5X-TPA LM26CIM5-VHA LM26CIM5X-VHA LM26CIM5-VPA LM26CIM5X-VPA LM26CIM5-XHA LM26CIM5X-XHA LM26CIM5-XPA LM26CIM5X-XPA LM26CIM5-YHA LM26CIM5X-YHA LM26CIM5-YPA LM26CIM5X-YPA LM26CIM5-ZHA LM26CIM5X-ZHA Connection Diagram Pin Description Pin Pin Number Name 1 HYST Hysteresis control, digital input ...

Page 3

Absolute Maximum Ratings Input Voltage Input Current at any pin (Note 2) Package Input Current(Note 2) Package Dissipation 25˚C A (Note 3) Soldering Information SOT23 Package Vapor Phase (60 seconds) Infrared (15 seconds) Storage Temperature LM26 Electrical ...

Page 4

... For example: • the part number LM26CIM5-TPA has T output. • the part number LM26CIM5-FPD has T output. Active-high open-drain and active-low push-pull options are available, please contact National Semiconductor for more informa- tion. www.national.com < > GND 150˚C. For this device the typical thermal resistance (θ ...

Page 5

Functional Description LM26 OPTIONS LM26-_ _A LM26-_ _C FIGURE 1. Output Pin Options Block Diagrams The LM26 can be factory programmed to have a trip point anywhere in the range of −55˚C to +110˚C. Applications Hints AFTER-ASSEMBLY PCB TESTING The ...

Page 6

Applications Hints (Continued) TABLE 1. Resistive compensation for capacitive loading of V TEMP C LOAD ≤100pF 1nF 10nF 100nF ≥1µ series with capacitor series with signal path FIGURE 2. Resistor placement for capacitive loading ...

Page 7

Typical Applications Note: The fan’s control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM26 goes low, the fan will speed up. FIGURE 4. Two Speed Fan Speed Control FIGURE 5. ...

Page 8

Typical Applications FIGURE 7. Audio Power Amplifier Thermal Protection www.national.com (Continued) FIGURE 8. Simple Thermostat 8 10132322 10132323 ...

Page 9

... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 Order Number LM26CIM5 or LM26CIM5X NS Package Number MA05B 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

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