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Features
TC52
General Description
The TC52 consists of two independent low power voltage detectors in a space-saving 5-pin SOT-23A package. Typical supply current consumption is only 2A at an input voltage of 2V. The voltage detection threshold settings are factory-programmed and guaranteed to 2% accuracy. Threshold settings over a range of 1.5V to 5.0V are available. The TC52 is available with open drain (NMOS) configurations. Small size, high precision, low supply current, and low installed cost makes the TC52 the ideal voltage detector for a wide variety of voltage monitoring applications.
Dual Channel Voltage Detector
* Two Independent Voltage Detectors in One Package * Highly Accurate: 2% * Low Power Consumption: 2.0A, Typ. * Detect Voltage Range: 1.5V to 5.0V * Operating Voltage: 1.5V to 10.0V * Output Configuration: N-Channel Open-Drain * Space-Saving 5-Pin SOT-23A Package
Typical Applications
* Battery Life Monitors and Recharge Voltage Monitors * Memory Battery Backup Circuitry * Power-On Reset Circuits * Power Failure Detection * Delay Circuitry
Functional Block Diagram
VIN1
+ -
VOUT1
Device Selection Table
Part Number TC52-xxxxxxxxxx Package Temp. Range
VIN2
5-Pin SOT-23A -40C to +85C
+ -
VOUT2
Other output voltages are available. Please contact Microchip Technology Inc. for details.
GND
Package Type
VREF
5-Pin SOT-23A
VOUT2 5 VIN2 4
TC52
1 VOUT1 2 VIN1 3 GND
2002 Microchip Technology Inc.
DS21430B-page 1
TC52
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage ........................................................+12V Output Current ....................................................50mA Output Voltage.......................VIN + 0.3V to VSS - 0.3V Power Dissipation 5-Pin SOT-23A ...........................................100mW Operating Temperature Range.............-40C to +85C Storage Temperature Range ..............-40C to +125C
*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.
TC52 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = 25C, unless otherwise specified. Note 1. Symbol VIN ISS Parameter Operating Voltage Supply Current Min 1.5 -- -- -- -- -- -- -- -- -- -- VT1 x 0.98 VT2 x 0.98 Typ -- 1.35 1.50 1.95 2.40 3.00 0.45 0.50 0.65 0.80 1.00 VT1 0.5% VT2 0.5% Max 10.0 3.90 4.50 5.10 5.70 6.30 1.30 1.50 1.70 1.90 2.10 VT1 x 1.02 VT2 x 1.02 Units V
A
Test Conditions VDF (T) = 1.5 to 5.0V VIN1 = 1.5V VIN1 = 2.0V VIN1 = 3.0V VIN1 = 4.0V VIN1 = 5.0V VIN1 = 1.5V VIN1 = 2.0V VIN1 = 3.0V VIN1 = 4.0V VIN1 = 5.0V Note 2 Note 2
IIN2
Input Current VIN2
A
VDET1 VDET2 VHYS1 VHYS2 IOUT
Channel 1 Detect Voltage Channel 2 Detect Voltage Hysteresis Range 1 Hysteresis Range 2 Output Current
V V V V mA
VDET1 - x 0.02 VDET1 - x 0.05 VDET1 - x 0.08 VDET2 - x 0.02 VDET2 - x 0.05 VDET2 - x 0.08 0.3 3.0 5.0 6.0 7.0 -- -- 2.2 7.7 10.1 11.5 13.0 100 -- -- -- -- -- -- -- 0.2
VOL = 0.5V, VIN1 = 1.0V VIN1 = 2.0V VIN1 = 3.0V VIN1 = 4.0V VIN1 = 5.0V
VDET -/ (TOPR VDET -)
Temperature Characteristics Detection Time
ppm/C -40C TOPR 85C msec Time from VIN = VDET - to VOUT = VOL
tDLY
Note 1: 2:
Additional resistance between the VIN1 pin and the supply voltage may alter the electrical characteristics. VT1, VT2 are the factory-programmed voltage detection thresholds.
DS21430B-page 2
2002 Microchip Technology Inc.
TC52
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. (5-Pin SOT-23A) 1 2 3 4 5
PIN FUNCTION TABLE
Symbol VOUT1 VIN GND VIN2 VOUT2 Detector #1 output. Supply voltage input, detect voltage 1. Ground terminal. Detect voltage 2. Detector #2 output. Description
3.0
DETAILED DESCRIPTION
In normal steady-state operation and for either channel, when VIN > VDET -, the output is high, see Figure 3-1. (In the case of the TC52N, this is an opendrain condition.) If and when the input falls below VDET -, the output pulls down (Logic 0) to VSS. Generally, VOUT can pull down to within 0.5V of VSS at rated output current and input voltages. (Also see Section 1.0, Electrical Characteristics).
The output, VOUT, stays valid until the input voltage falls below the minimum operating voltage, VINMIN, of 0.7V. Below this minimum operating voltage, the output is undefined. During power-up or anytime VIN has fallen below VINMIN, VOUT will remain undefined until VIN rises above VINMIN, at which time the output becomes valid. VOUT is maintained in its active low state while VINMIN < VIN < VDET +. (VDET + = VDET - + VHYST). If and when the input rises above VDET +, the output will assume its inactive state (open-drain for TC52N).
FIGURE 3-1:
TIMING DIAGRAM
VINx VDET+ VHYST Detect Voltage VDET- Minimum Operating Voltage Ground Level Release Voltage or RESET Voltage
VOUTx
Output Voltage
Ground Level
2002 Microchip Technology Inc.
DS21430B-page 3
TC52
4.0 APPLICATIONS INFORMATION
4.1 Battery and Main Supply Monitor
Pin 2 (VIN1) acts as both the input to Voltage Detector #1, as well as the power supply input for the chip. As such, always assign VIN1 to monitor voltages between 1.5V and 10V. Failure to do this will result in unreliable detector operation due to an out-of-tolerance supply voltage. In high noise environments, it may be necessary to install a small input bypass capacitor (0.01F to 0.1F) from VIN1 to ground to minimize onchip power supply noise. The circuit shown in Figure 4-1 provides both a processor supply monitor/reset function, as well as a low battery detect function. As shown, the TC52N3330ECT (N-Channel outputs) uses Detector 2 to monitor the system power supply rail. When the power supply is 10% below its nominal output voltage rating, the VOUT2 output is driven and held low. When the power supply voltage is above 3.0V nominal, VOUT2 is driven to an open circuit and the combination of R1 and C1 provides a reset time out delay. Detector 1 monitors the voltage on the main supply battery. A low battery condition is indicated when the battery voltage falls to 3.3V, at which time the main processor is interrupted to initiate a warning or system shutdown.
FIGURE 4-1:
SUPPLY MONITOR AND PROCESSOR SUPERVISOR
+3.3V System 3.3V R1 47K VOUT2 RESET
TC105 Step Down DC/DC Converter 6V Battery
VIN2
+ -
+C 1 - 1F +3.3V R2 47K
GND TC52N3330ECT VIN1 VOUT1
Processor
INT
DS21430B-page 4
2002 Microchip Technology Inc.
TC52
5.0
5.1
PACKAGING INFORMATION
Package Marking Information
3
1
represents N-channel indication and integer part of output voltage Symbol C N Output CMOS Nch
2
3
represents registration serial number Detect Voltage 1 Detect Voltage 2 4.5 2.7
Symbol 0P
Note: Symbols for other custom voltages set prior to shipment.
4
represents assembly lot code
5.2
Taping Form
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
User Direction of Feed
Device Marking
W
PIN 1
P Standard Reel Component Orientation TR Suffix Device (Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
5-Pin SOT-23A
8 mm
4 mm
3000
7 in
2002 Microchip Technology Inc.
DS21430B-page 5
TC52
5.3 Package Dimensions
SOT-23A-5
.075 (1.90) REF.
.122 (3.10) .098 (2.50) .020 (0.50) .012 (0.30) PIN 1 .122 (3.10) .106 (2.70) .057 (1.45) .035 (0.90) .006 (0.15) .000 (0.00)
.071 (1.80) .059 (1.50)
.037 (0.95) REF.
10 MAX. .024 (0.60) .004 (0.10)
.010 (0.25) .004 (0.09)
Dimensions: inches (mm)
DS21430B-page 6
2002 Microchip Technology Inc.
TC52
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART CODE
Output Configuration: N = Open Drain Detected Voltage 1*: Ex: 45 = 4.5V Detected Voltage 2*: Ex: 27 = 2.7V Temperature: E: -40C to +85C
TC52
N
45
27
E
CT
XX
Package Type and Pin Count: CT: 5-Pin SOT-23A Taping Direction: TR: Standard Taping
*Other voltages are available. Please contact Microchip Technology Inc. for details.
Sales and Support
Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.
DS21430B-page7
TC52
NOTES:
DS21430B-page8
2002 Microchip Technology Inc.
TC52
Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, MXLAB, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company's quality system processes and procedures are QS-9000 compliant for its PICmicro(R) 8-bit MCUs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001 certified.
2002 Microchip Technology Inc.
DS21430B-page 9
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DS21430B-page 10
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2002 Microchip Technology Inc.

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