M TC52 Dual Channel Voltage Detector Features General Description • Two Independent Voltage Detectors in One Package • Highly Accurate: ±2% • Low Power Consumption: 2.0µA, 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 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 2µA 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. 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 Package TC52-xxxxxxxxxx Temp. Range VIN2 5-Pin SOT-23A -40°C to +85°C + Other output voltages are available. Please contact Microchip Technology Inc. for details. VOUT2 – GND Package Type VREF 5-Pin SOT-23A VOUT2 VIN2 5 4 TC52 1 2 3 VOUT1 VIN1 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.............-40°C to +85°C Storage Temperature Range ..............-40°C to +125°C *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 = 25°C, unless otherwise specified. Note 1. Symbol Parameter Min Typ Max Units Test Conditions VIN Operating Voltage 1.5 — 10.0 V VDF (T) = 1.5 to 5.0V ISS Supply Current — — — — — 1.35 1.50 1.95 2.40 3.00 3.90 4.50 5.10 5.70 6.30 µA VIN1 = 1.5V VIN1 = 2.0V VIN1 = 3.0V VIN1 = 4.0V VIN1 = 5.0V IIN2 Input Current VIN2 — — — — — 0.45 0.50 0.65 0.80 1.00 1.30 1.50 1.70 1.90 2.10 µA VIN1 = 1.5V VIN1 = 2.0V VIN1 = 3.0V VIN1 = 4.0V VIN1 = 5.0V VDET1 - Channel 1 Detect Voltage VT1 x 0.98 VT1 ±0.5% VT1 x 1.02 V Note 2 VDET2 - Channel 2 Detect Voltage VT2 x 0.98 VT2 ±0.5% VT2 x 1.02 V Note 2 VHYS1 Hysteresis Range 1 VDET1 - x 0.02 VDET1 - x 0.05 VDET1 - x 0.08 VHYS2 Hysteresis Range 2 VDET2 - x 0.02 VDET2 - x 0.05 VDET2 - x 0.08 IOUT Output Current 0.3 3.0 5.0 6.0 7.0 2.2 7.7 10.1 11.5 13.0 — — — — — ∆VDET -/ (∆TOPR VDET -) Temperature Characteristics — ±100 — tDLY Detection Time — — 0.2 Note 1: 2: V V mA VOL = 0.5V, VIN1 = 1.0V VIN1 = 2.0V VIN1 = 3.0V VIN1 = 4.0V VIN1 = 5.0V ppm/°C -40°C ≤ TOPR ≤ 85°C msec Time from VIN = VDET - to VOUT = VOL 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 FUNCTION TABLE Pin No. (5-Pin SOT-23A) Symbol 1 VOUT1 3.0 Description Detector #1 output. 2 VIN 3 GND Supply voltage input, detect voltage 1. Ground terminal. 4 VIN2 Detect voltage 2. 5 VOUT2 Detector #2 output. 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). FIGURE 3-1: 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). TIMING DIAGRAM VINx VDET+ VHYST Release Voltage or RESET Voltage – Detect Voltage VDET Minimum Operating Voltage Ground Level VOUTx Output Voltage Ground Level 2002 Microchip Technology Inc. DS21430B-page 3 TC52 4.0 APPLICATIONS INFORMATION 4.1 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. 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 (0.01µF to 0.1µF) from VIN1 to ground to minimize onchip power supply noise. FIGURE 4-1: Battery and Main Supply Monitor SUPPLY MONITOR AND PROCESSOR SUPERVISOR +3.3V TC105 Step Down DC/DC Converter + – 6V Battery System 3.3V VIN2 VOUT2 +C 1 – 1µF GND +3.3V TC52N3330ECT R2 47K VIN1 DS21430B-page 4 R1 47K VOUT1 RESET Processor INT 2002 Microchip Technology Inc. TC52 5.0 PACKAGING INFORMATION 5.1 Package Marking Information 3 1 2 represents N-channel indication and integer part of output voltage 3 Symbol Output C N CMOS Nch represents registration serial number Symbol Detect Voltage 1 Detect Voltage 2 0P 4.5 2.7 Note: Symbols for other custom voltages set prior to shipment. 4 5.2 represents assembly lot code 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 5-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 DS21430B-page 5 TC52 5.3 Package Dimensions SOT-23A-5 .075 (1.90) REF. .071 (1.80) .059 (1.50) .122 (3.10) .098 (2.50) .020 (0.50) .012 (0.30) PIN 1 .037 (0.95) REF. .122 (3.10) .106 (2.70) .057 (1.45) .035 (0.90) .006 (0.15) .000 (0.00) .010 (0.25) .004 (0.09) 10° MAX. .024 (0.60) .004 (0.10) 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 TC52 N 45 27 E CT XX Output Configuration: N = Open Drain Detected Voltage 1*: Ex: 45 = 4.5V Detected Voltage 2*: Ex: 27 = 2.7V Temperature: E: -40°C to +85°C 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. 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