M TC51 1A Voltage Detector with Output Delay Features General Description * * * * * * * The TC51 is a very low power, open drain output, CMOS voltage detector with built-in delay. It is particularly well-suited for battery powered applications because of its extremely low 1A operating current and small surface-mount packaging. Each part is lasertrimmed to the desired threshold voltage, which can be specified from 1.6V to 6.0V. The standard built-in output delay is 50msec-200msec. Precise Detection Thresholds: 2.0% Small Package: 3-Pin SOT-23A Low Supply Current: Typ. 1A Wide Detection Range: 1.6V to 6.0V Wide Operating Voltage Range: 0.7V to 10V Built-in Delay Circuit: 50msec to 200 msec Open-Drain Output The device includes a comparator, low-current highprecision reference, laser-programmed voltage divider, hysteresis circuit and output driver with digital delay timer. Applications * Battery Voltage Monitoring * Microprocessor Reset * System Brown-out Protection Device Selection Table Part Number Package TC51-xxxxxxxxxx Temp. Range 3-Pin SOT-23A -40C to +85C Other output voltages are available. Please contact Microchip Technology Inc. for details. In operation, the TC51's output (VOUT) remains in the logic HIGH state as long as VIN is greater than the specified threshold voltage (VDET -). When VIN falls below VDET -, the output is immediately driven to a logic LOW. VOUT remains LOW until VIN rises above VDET by an amount VHYST, whereupon it returns to a logic HIGH after expiration of the built-in delay time. Functional Block Diagram VIN Package Type VOUT 3-Pin SOT-23A VIN Delay Circuit 3 VREF TC51 VSS 1 2 VOUT VSS NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59. 2002 Microchip Technology Inc. DS21429B-page 1 TC51 1.0 ELECTRICAL CHARACTERISTICS *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. Absolute Maximum Ratings* Input Voltage ........................................................+12V Output Current ....................................................50mA Output Voltage: Open Drain ..........(VSS - 0.3V) to 12V Power Dissipation (TA 70C): 3-Pin SOT-23A ...........................................240mW Operating Temperature Range.............-40C to +85C Storage Temperature Range ..............-65C to +150C TC51 ELECTRICAL SPECIFICATIONS Electrical Characteristics: TA = 25C, unless otherwise specified. Symbol Parameter Min Typ Max Units Test Conditions VIN Operating Voltage 0.7 -- 10.0 V (VDET -) = 1.6 to 6.0V ISS Quiescent Current -- -- -- -- -- 0.9 1.0 1.3 1.6 2.0 2.6 3.0 3.4 3.8 4.2 A VIN = 1.5V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V VDET - Threshold Voltage VT x 0.98 VT 0.5% VT x 1.02 V Note 1 VHYST Hysteresis Voltage VDET - x 0.02 VDET - x 0.05 VDET - x 0.08 V IOUT Output Current -- -- 2.2 7.7 10.1 11.5 13.0 -- -- mA TDLY Delay Time 50 -- 200 msec TC (VDET -) Tempco of (VDET -) -- 100 -- ppm/C Note 1: VOL = 0.5V, VIN = 1.0V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V Standard -40C TA 85C VT is the factory programmed threshold voltage setting. DS21429B-page 2 2002 Microchip Technology Inc. TC51 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (3-Pin SOT-23A) Symbol 1 VOUT 2 VSS Ground terminal. 3 VIN Analog input. This pin is both the power supply input and the voltage to be monitored. 2002 Microchip Technology Inc. Description Digital output. This output goes low when VIN drops below VDET - and returns high when VIN rises above VDET - + VHYST. (See Figure 3-1, Timing Diagram). DS21429B-page 3 TC51 3.0 DETAILED DESCRIPTION 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 after Delay Time (TDLY). In normal steady-state operation, when VIN > VDET -, the output is high, see Figure 3-1. 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 voltage. (Also see Section 1.0, Electrical Characteristics). FIGURE 3-1: TIMING DIAGRAM VIN VDET+ VHYST Release Voltage Detect Voltage VDETMinimum Operating Voltage Ground Level VOUT Output Voltage Delay Time (TDLY) Ground Level DS21429B-page 4 2002 Microchip Technology Inc. TC51 4.0 APPLICATIONS INFORMATION 4.1 Processor RESET Supervisor FIGURE 4-1: VDD Figure 4-1 shows the TC51 used as a processor reset supervisor. Because the TC51 is available in threshold settings of 1.6V to 6.0V, the user can choose the reset single threshold setting best suited to the system power supply voltage at hand. Also, the 1A supply current is significantly lower than its nearest competitor. VDD As shown in the timing diagram (Figure 3-1),VOUT is low for voltages between 0.7V and VDET +. The TC51 activates its on-board delay timer once the power supply voltage is within tolerance (i.e., greater than VDET +). VOUT is released after delay time (TDLY). R1 VOUT Processor 47K RESET TC51 Should the power supply voltage momentarily dip ("brown-out" condition), the TC51 immediately drives and holds the processor RESET input low. RESET is released after the power supply voltage is again within tolerance, and after the delay timer expires. RESET is driven and held low when power fails (power-off or "blackout"), and is maintained down low to a supply voltage of 0.7V. FIGURE 4-2: PROCESSOR RESET SUPERVISOR GND TC51 OPERATION DURING POWER-UP, BROWN-OUT AND POWER DOWN Power-Up Nominal Power Supply Voltage Brown-Out Steady State Operation Power Down Threshold Voltage (VDET-, VDET+) 0.7V Time VOH TC51 Output VOL 2002 Microchip Technology Inc. TDLY TDLY DS21429B-page 5 TC51 5.0 TYPICAL CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. 1. SUPPLY CURRENT VS. INPUT VOLTAGE TC51N2502 TC51N1602 4.0 SUPPLY CURRENT ISS (A) SUPPLY CURRENT ISS (A) SUPPLY CURRENT ISS (A) TC51N3502 4.0 4.0 3.0 3.0 2.0 -30C TA = 80C 25C 1.0 3.0 2.0 -30C TA = 80C 1.0 25C 0.0 0.0 0 2 4 6 8 TA = 80C -30C 1.0 25C 0.0 0 10 2.0 INPUT VOLTAGE VIN (V) 2 8 4 6 INPUT VOLTAGE VIN (V) 0 10 2 8 4 6 INPUT VOLTAGE VIN (V) 10 2. THRESHOLD VOLTAGE, HYSTERESIS VOLTAGE VS. AMBIENT TEMPERATURE 1.7 VHYST VDET- 1.6 1.5 1.4 -40 -20 0 20 60 80 40 AMBIENT TEMPERATURE TA (C) TC51N3502 2.8 2.7 VHYST 2.6 VDET- 2.5 2.4 2.3 -40 -20 0 20 60 80 40 AMBIENT TEMPERATURE TA (C) THRESHOLD HYSTERESIS VOLTAGE VDET- ,VHYST TC51N2502 THRESHOLD HYSTERESIS VOLTAGE VDET- ,VHYST THRESHOLD HYSTERESIS VOLTAGE VDET- ,VHYST TC51N1602 1.8 3.8 3.7 VHYST 3.6 VDET- 3.5 3.4 3.3 3.2 -40 -20 0 20 60 40 80 AMBIENT TEMPERATURE TA (C) 3. OUTPUT VOLTAGE VS. INPUT VOLTAGE TC51N1602 TC51N2502 4 2.0 1.5 1.0 0.5 0.0 TC51N3502 5 VIN - VOUT: 100k TA = 30C = 25C = 80C 3 OUTPUT VOLTAGE VOUT (V) VIN - VOUT: 100k TA = 30C = 25C = 80C 2.5 OUTPUT VOLTAGE VOUT (V) OUTPUT VOLTAGE VOUT (V) 3.0 2 1 DS21429B-page 6 1 2 INPUT VOLTAGE VIN (V) 3 4 3 2 1 0 0 0 VIN - VOUT: 100k TA = 30C = 25C = 80C 0 1 2 3 INPUT VOLTAGE VIN (V) 4 0 1 2 3 4 5 INPUT VOLTAGE VIN (V) 2002 Microchip Technology Inc. TC51 5.0 TYPICAL CHARACTERISTICS (CONTINUED) 4. OUTPUT CURRENT VS. VDS TC51N1602 TC51N1602 1400 TA = 25C OUTPUT CURRENT IOUT (A) OUTPUT CURRENT IOUT (mA) 15.0 12.5 VIN = 1.5V 10.0 7.5 5.0 1.0V 2.5 TA = 25C VIN = 0.8V 1200 1000 0.7V 800 600 400 200 0.0 0.0 0.5 1.0 1.5 0 2.0 0.2 TC51N2502 TA = 25C 25 VIN = 2.0V 20 15 1.5V 10 5 0 0.0 0.5 1.0 1.5 2.0 800 600 200 0 0.0 2.5 0.7V 400 0.2 2.5V 30 2.0V 20 1.5V 10 0 1.0 1.5 2.0 VDS (V) 2002 Microchip Technology Inc. 2.5 3.0 3.5 OUTPUT CURRENT IOUT (A) OUTPUT CURRENT IOUT (mA) VIN = 3.0V 0.5 0.6 0.8 1.0 TC51N3502 TA = 25C 0 0.4 VDS (V) 1400 40 1.0 VIN = 0.8V 1000 TC51N3502 50 0.8 TA = 25C VDS (V) 60 0.6 TC51N2502 1200 OUTPUT CURRENT IOUT (A) OUTPUT CURRENT IOUT (mA) 30 0.4 VDS (V) VDS (V) TA = 25C VIN = 0.8V 1200 1000 800 0.7V 600 400 200 0.0 0.2 0.4 0.6 VDS (V) 0.8 1.0 DS21429B-page 7 TC51 5.0 TYPICAL CHARACTERISTICS (CONTINUED) 5. OUTPUT CURRENT VS. INPUT VOLTAGE TC51N1602 TC51N2502 25 VDS = 0.5V VDS = 0.5V TA = 30C OUTPUT CURRENT IOUT (mA) OUTPUT CURRENT IOUT (mA) 15.0 12.5 25C 10.0 7.5 5.0 80C 2.5 0.0 0.0 0.5 1.0 1.5 2.0 INPUT VOLTAGE VIN (V) TA = 30C 20 15 25C 10 80C 5 0 0.0 0.5 1.0 1.5 2.0 2.5 INPUT VOLTAGE VIN (V) 3.0 TC51N3502 OUTPUT CURRENT IOUT (mA) 40 VDS = 0.5V 35 TA C 30 25C 25 20 15 80C 10 5 0 0 DS21429B-page 8 1.0 2.0 3.0 INPUT VOLTAGE VIN (V) 4.0 2002 Microchip Technology Inc. TC51 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 2 represents first decimal of output voltage Symbol Voltage 0 1 2 3 4 5 6 7 8 9 .0 .1 .2 .3 .4 .5 .6 .7 .8 .9 3 1 represents N-channel indication and integer part of output voltage Symbol Output Voltage K L M N P R S Nch Nch Nch Nch Nch Nch Nch 0. 1. 2. 3. 4. 5. 6. 3 4 6.2 represents delay time Symbol Delay Time 5 50ms-200ms represents assembly lot code Taping Form Component Taping Orientation for 3-Pin SOT-23A (EIAJ SC-59) Devices User Direction of Feed Device Marking W PIN 1 P Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size Package 3-Pin SOT-23A 2002 Microchip Technology Inc. Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8 mm 4 mm 3000 7 in DS21429B-page 9 TC51 6.3 Package Dimensions SOT-23A-3 .020 (0.50) .012 (0.30) .071 (1.80) .055 (1.40) .118 (3.00) .098 (2.50) PIN 1 .075 (1.90) REF. .122 (3.10) .106 (2.70) .051 (1.30) .035 (0.90) .010 (0.25) .004 (0.09) 10 MAX. .006 (0.15) .000 (0.00) .022 (0.55) .014 (0.35) Dimensions: inches (mm) DS21429B-page 10 2002 Microchip Technology Inc. TC51 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 TC51 N 18 0 2 E CB XX Output Configuration: N = Open Drain Detected Voltage: Ex: 18 = 1.8V Output Delay: 0 = 50msec-200msec (standard) Tolerance: 2 = 2% Temperature: E: -40C to +85C Package Type and Pin Count: CB: 3-Pin SOT-23A (equivalent to EIAJ SC-59) Taping Direction: TR: Standard Taping 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. DS21429B-page11 TC51 NOTES: DS21429B-page12 2002 Microchip Technology Inc. TC51 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. 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Le Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Microchip Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 05/01/02 '!&' DS21429B-page 14 2002 Microchip Technology Inc.