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July 2006 Rev 4 1/23

STM1061

Low Power Voltage Detector

Features

■ Factory-trimmed Voltage Thresholds in 0.1V

Increments from 1.6 to 5.5V

■ ±2% Voltage Threshold Accuracy

■ Operating Voltage 0.7 to 6.0V

■ Open Drain Output

■ Low Supply Current of 0.9µA (typ)

■

Guaranteed OUT Assertion Down to V

= 0.7V

■ Power Supply Transient Immunity

■ Available in SOT23-3 and SOT323-3 (SC70-3)

packages

■ Operating Temperature –40 to 85°C.

Figure 1. Packages

1. Contact local sales office for availability.

SOT323-3, SC70-3 (W)

(1)

SOT23-3 (WX)

www.st.com

Summary of content (23 pages)

PAGE 1
STM1061 Low Power Voltage Detector Features ■ Factory-trimmed Voltage Thresholds in 0.1V Increments from 1.6 to 5.5V ■ ±2% Voltage Threshold Accuracy ■ Operating Voltage 0.7 to 6.0V ■ Open Drain Output ■ Low Supply Current of 0.9µA (typ) ■ Guaranteed OUT Assertion Down to VCC = 0.7V ■ Power Supply Transient Immunity ■ Available in SOT23-3 and SOT323-3 (SC70-3) packages ■ Figure 1. Packages SOT23-3 (WX) SOT323-3, SC70-3 (W) (1) Operating Temperature –40 to 85°C. 1.
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Contents STM1061 Contents 1 Summary Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 2.1 OUT (Open Drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 VSS . . . . . . . . . . .
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STM1061 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of figures STM1061 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. 4/23 Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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STM1061 1 Summary Description Summary Description The STM1061 low power voltage detector provides monitoring of battery, power-supply, and regulated system voltages. A precision voltage reference and comparator monitors the V CC input and compares it with a specified voltage threshold condition. When V CC falls below a specified trip point threshold, the output (OUT) is forced low and remains asserted as long as the VCC input remains below VTH– + hysteresis (VHYST).
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Summary Description Figure 4. STM1061 SOT323-3 (SC70-3) Connections VSS OUT 1 2 VCC 3 AI10479 Figure 5. N-Channel Open Drain Output Block Diagram VCC OUT R1 + – VREF R2 VSS R3 AI10482 Figure 6. STM1061N Active-Low, Open Drain Hardware Hookup DC/DC Converter VOUT VIN Regulated 3V VSS R VCC + 3.
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STM1061 2 Pin Descriptions Pin Descriptions See Figure 2 on page 5 and Table 1 on page 5 for a brief overview of the signals connected to this device. 2.1 OUT (Open Drain) This is the Open Drain Output. It goes low when V CC drops below VTH–, and remains low as long as V CC is below VTH– + V HYST. 2.2 VCC This is the Supply voltage and input for the Voltage Detector. 2.3 VSS Ground, VSS, is the reference for the power supply. It must be connected to the system ground. Table 2.
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Operation STM1061 3 Operation 3.1 Output The STM1061 Voltage Detector monitors system voltages from 1.6 to 5V in 100mV increments. The detector is designed to ignore fast transients on VCC and has a voltage hysteresis (VHYST). The STM1061 asserts an output signal (OUT) whenever VCC goes below the Voltage Detect Threshold (VTH–). The output signal (OUT) stays asserted until VCC goes above the Voltage Detect Release (VTH+). Output voltage (VOUT) is guaranteed valid down to V CC =0.7V at 25°C.
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STM1061 Typical Operating Characteristics Figure 7. Supply Current vs. Input Voltage 1400 1200 ICC (nA) 1000 800 600 Temp = –40°C 400 Temp = 25°C 200 Temp = 85°C 0 0 1 2 3 4 5 VCC (V) Figure 8. 6 AI11119b Supply Current vs.
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Typical Operating Characteristics Figure 9. STM1061 Output Detect Delay Time vs. Ambient Temperature VCC-to-OUT Detect Delay: tPD (µs) 35.00 30.00 VTH– = 3.4V 25.00 20.00 15.00 VTH– = 1.6V 10.00 5.00 0.00 –40 –20 0 20 40 60 Ambient Temperature: TA (°C) 80 AI11121b Figure 10. Output Release Delay Time vs. Ambient Temperature 50.00 VCC-to-OUT Release Delay: tPR (µs) 45.00 40.00 VTH+ = 3.57V 35.00 30.00 25.00 20.00 15.00 VTH+ = 1.68V 10.00 5.00 0.
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STM1061 Typical Operating Characteristics Figure 11. Maximum Transient Duration vs. Reset Threshold Overdrive 160 Transient Duration (µs) 140 VTH– = 3.4V 120 VTH– = 1.6V 100 80 60 40 20 0 1 10 100 1000 10000 Threshold Overdrive (mV) AI11123b 1. Reset occurs above the curve. Figure 12. Detect, Release Voltage vs. Ambient Temperature for V TH– = 3.4V Detect, Release Voltage: VTH–, VTH+ (V) 3.6 3.5 Detect Voltage, VTH– Release Voltage, VTH+ 3.4 3.
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Typical Operating Characteristics STM1061 Figure 13. N-channel Driver Output Current vs. V DS 0.06 VCC = 3.3V 0.05 Output Current: ID (A) VCC = 3.0V VCC = 2.7V 0.04 VCC = 2.1V VCC = 1.5V 0.03 VCC = 1.0V 0.02 0.01 0 0 0.25 0.5 0.75 1 1.25 Output Voltage: VDS (V) 1.5 AI11125b Figure 14. N-channel Driver Output Current vs. Input Voltage for V DS = 0.5V 30 Output Current: IOUT (mA) 25 Temp. (25°C) 20 Temp. (85°C) Temp. (–40°C) 15 10 5 0 0 0.5 1 1.5 2 2.
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STM1061 5 Maximum Rating Maximum Rating Stressing the device above the rating listed in the Table 3: Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.
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DC and AC Parameters 6 STM1061 DC and AC Parameters This section summarizes the operating measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC characteristics Tables that follow, are derived from tests performed under the Measurement Conditions summarized in Table 4: Operating and AC Measurement Conditions. Designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. Table 4.
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STM1061 DC and AC Parameters Figure 16.
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DC and AC Parameters Table 5. Sym. DC and AC Characteristics Description VCC Operating Voltage ICC VCC Supply Current IOUT STM1061 Output Current, N-channel (VDS = 0.5V), Reset asserted Test Condition (1) Min Typ 0.7 Max Unit 6.0 V VCC = 3.0V, No Load 0.9 3.0 µA VCC = 5.5V, No Load 1.1 3.6 µA VCC = 1.0V 1.0 1.7 mA VCC = 2.0V 3.0 14 mA VCC = 3.0V 5.0 22 mA VCC = 4.0V 6.0 26 mA VCC = 5.0V 7.
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STM1061 7 Package Mechanical Package Mechanical In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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Package Mechanical Table 6. STM1061 SOT23-3 – 3-lead Small Outline Transistor Package Mechanical Data mm inches Symbol Typ Min Max A 0.89 A1 A2 Min Max 1.12 0.035 0.044 0.01 0.10 0.001 0.004 0.88 1.02 0.035 0.042 b 0.30 0.50 0.012 0.020 C 0.08 0.20 0.003 0.008 D 2.80 3.04 0.110 0.120 E 2.10 2.64 0.083 0.104 E1 1.20 1.40 0.047 0.055 e 0.89 1.03 0.035 0.041 e1 1.78 2.05 0.070 0.081 L 18/23 Typ 0.54 0.021 L1 0.40 0.60 0.016 0.
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STM1061 Package Mechanical Figure 18. SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Outline E E1 0.30 B M CAB A1 1 e D e1 0.10 M 3X CAB 3X b C θ1 C A2 0.10 C A A θ L1 C L SOT323-3 1. Drawing is not to scale. Table 7. SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Mechanical Data mm inches Symbol Typ Min Max A 0.80 A1 Typ Min Max 1.10 0.031 0.043 0.00 0.10 0.000 0.004 A2 0.80 1.00 0.031 0.039 b 0.25 0.40 0.010 0.016 C 0.10 0.
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Part Numbering 8 STM1061 Part Numbering Table 8. Ordering Information Scheme Example: STM1061 N xx WX 6 F Device Type STM1061 Output Type N = Open Drain (Active-Low) Threshold Voltage (1) xx = See Table 9 on page 21 Package WX = SOT23-3 W = SOT323-3 (SC70-3) (1) Temperature Range 6 = –40 to 85°C Shipping Method F = ECOPACK Package, Tape & Reel 1. Other thresholds voltage options are offered. Minimum order quantities may apply. Contact local sales office for availability.
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STM1061 Part Numbering Table 9. Factory-Trimmed Thresholds with Marking Description Threshold Voltage VTH– (V) at TA = 25°C (1) Suffix Topside Marking Min (–2%) Typ Max (+2%) 16 1.568 1.600 1.632 16Nx 17 1.666 1.700 1.734 17Nx 19 1.862 1.900 1.938 19Nx 21 2.058 2.100 2.142 21Nx 22 2.156 2.200 2.244 22Nx 23 2.254 2.300 2.346 23Nx 25 2.450 2.500 2.550 25Nx 26 2.548 2.600 2.652 26Nx 27 2.646 2.700 2.754 27Nx 28 2.744 2.800 2.856 28Nx 29 2.842 2.900 2.
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Revision History 9 STM1061 Revision History Table 10. 22/23 Document Revision History Date Version Description 20-January2004 1.0 First Edition 01-Aug-05 1.1 Update Operation section, characteristics; insert new graphics; add ECOPACK information ( Figure 7, 8, 9, 10, 11, 12, 13, and 14; Table Table 5, 8, and 9 ) 02-Sep-05 1.2 Update characteristics, remove ‘push-pull output’ reference (Figure 8, 9, 10, 11, 12, and 16; Table Table 2, , 5, and 8) 19-Oct-05 2.
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STM1061 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.