Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 Ultra-Low Supply-Current/Supply-Voltage Supervisory Circuits FEATURES APPLICATIONS • • • • • • • • • • • • • Controlled Baseline – One Assembly Site – One Test Site – One Fabrication Site Extended Temperature Performance of –55°C to 125°C Enhanced Diminishing Manufacturing Sources (DMS) Support Enhanced Product-Change Notification Qualification Pedigree (1) Precision Supply Voltage Supervision Range: 0.9 V, 1.2 V, 1.5 V, 1.6 V, 2 V, and 3.3 V High Trip-Point Accuracy: 0.75% Supply Current of 1.2 µA (Typ) RESET Defined With Input Voltages as Low as 0.4 V Power-On Reset Generator With a Delay Time of 130 ms Push/Pull or Open-Drain RESET Outputs SOT23-6 Package • • • • • Applications Using Low-Power DSPs, Microcontrollers, or Microprocessors Portable- and Battery-Powered Equipment Intelligent Instruments Wireless Communication Systems Industrial Equipment Notebook/Desktop Computers DESCRIPTION The TPS310x and TPS311x families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power-on, RESET is asserted when the supply voltage (VDD) becomes higher than 0.4 V. Thereafter, the supervisory circuit monitors VDD and keeps the RESET output active as long as VDD remains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive state to ensure proper system reset. The delay time starts after VDD has risen above VIT. When VDD drops below VIT, the output becomes active again. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage divider. (1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. The TPS3103 and TPS3106 have an active-low, open-drain RESET output. The TPS3110 has an active-low push/pull RESET. The product spectrum is designed for supply voltages of 0.9 V up to 3.3 V. The circuits are available in SOT23-6 packages. The TPS31xx family is characterized for operation over a temperature range of –55°C to 125°C. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2006, Texas Instruments Incorporated Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 3.3 V 1.6 V VDD VCORE TPS3106K33MDBVREP R3 DSP R1 MR RSTVDD RESET SENSE RSTSENSE R2 GND GND Typical Application Circuit 2 Submit Documentation Feedback GND VIO Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PIN DESCRIPTIONS TPS3106 DBV PACKAGE (TOP VIEW) TPS3103 DBV PACKAGE (TOP VIEW) TPS3110 DBV PACKAGE (TOP VIEW) RESET 1 6 VDD RSTVDD 1 6 VDD GND 2 5 PFO GND 2 5 RSTSENSE MR 3 4 PFI MR 3 4 SENSE RESET 1 6 VDD GND 2 5 WDI MR 3 4 SENSE TERMINAL FUNCTIONS TERMINAL DESCRIPTION NAME DEVICE NO. GND All 2 Ground MR All 3 Manual reset input. Pull low to force a reset. RESET remains low as long as MR is low and for the timeout period after MR goes high. Leave unconnected or connect to VDD when unused. PFI TPS3103 4 Power-fail input. Compares to 0.551 V with no additional delay. Connect to VDD if not used. PFO TPS3103 5 Power-fail output. Goes high when voltage at PFI rises above 0.551 V. RESET TPS3103, TPS3110 1 Active-low reset output. Either push-pull or open-drain output stage. RSTSENSE TPS3106 5 Active-low reset output. Logic level at RSTSENSE only depends on the voltage at SENSE and the status of MR. RSTVDD TPS3106 1 Active-low reset output. Logic level at RSTVDD only depends on the voltage at VDD and the status of MR. SENSE TPS3106, TPS3110 4 Sense. A reset is asserted if the voltage at SENSE is lower than 0.551 V. Connect to VDD if unused. VDD All 6 Supply voltage. Powers the device and monitors its own voltage. WDI TPS3110 5 Watchdog timer input. If WDI remains high or low longer than the time-out period, reset is triggered. The timer clears when reset is asserted or when WDI sees a rising edge or a falling edge. ORDERING INFORMATION (1) (1) (2) (3) ORDERABLE PART NUMBER NOMINAL SUPPLY VOLTAGE THRESHOLD VOLTAGE, VIT (2) SYMBOL TPS3103E12MDBVREP (3) 1.2 V 1.142 V TBD TPS3103E15MDBVREP (3) 1.5 V 1.434 V TBD TPS3103H20MDBVREP (3) 2V 1.84 V TBD TPS3103K33MDBVREP (3) 3.3 V 2.941 V TBD TPS3106E09MDBVREP (3) 0.9 V 0.86 V TBD TPS3106E16MDBVREP (3) 1.6 V 1.521 V TBD TPS3106K33MDBVREP 3.3 V 2.941 V AAVM TPS3110E09MDBVREP (3) 0.9 V 0.86 V TBD TPS3110E12MDBVREP (3) 1.2 V 1.142 V TBD TPS3110E15MDBVREP (3) 1.5 V 1.434 V TBD TPS3110K33MDBVREP (3) 3.3 V 2.941 V TBD For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Custom threshold voltages are available. Minimum order quantities apply. Contact TI for details and availability. Product Preview Submit Documentation Feedback 3 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 AVAILABLE OPTIONS DEVICE RESET OUTPUT TPS3103 Open drain RSTSENSE, RSTVDD OUTPUT SENSE INPUT Open drain ü PFO OUTPUT Open drain TPS3106 TPS3110 WDI INPUT ü Push-pull ü ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) Supply voltage range, VDD (2) All other pins (2) VALUE UNIT –0.3 to 3.6 V –0.3 to 3.6 V Maximum low output current, IOL 5 mA Maximum high output current, IOH –5 mA Input clamp current, IIK (VI < 0 or VI > VDD) ±10 mA Output clamp current, IOK (VO < 0 or VO > VDD) ±10 mA Operating temperature range, TA –55 to 125 °C Storage temperature range, Tstg –65 to 150 °C 260 °C Soldering temperature (1) (2) Stresses beyond 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 beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to GND. For reliable operation, the device must not be operated at 3.6 V for more than t = 1000h continuously RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) Supply voltage, VDD (1) Input voltage, VI MIN MAX 0.4 3.3 V 0 VDD + 0.3 V 0.7 × VDD High-level input voltage, VIH at MR, WDI V 0.3 × VDD Low-level input voltage, VIL at MR, WDI Input transition rise and fall rate at ∆t/∆V at MR, WDI Operating temperature, TA (1) UNIT –55 V 100 ns/V 125 °C For proper operation of SENSE, PFI, and WDI functions: VDD ≥ 0.8 V. ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VDD = 3.3 V, IOH = –3 mA VDD = 1.8 V, IOH = –2 mA VOH High-level output voltage VDD = 1.5 V, IOH = –1 mA 0.8 × VDD V 0.7 × VDD V VDD = 0.9 V, IOH = –0.4 mA VDD = 0.5 V, IOH = –5 µA VDD = 3.3 V, IOL = 3 mA VOL Low-level output voltage VOL Low-level output voltage VDD = 1.5 V, IOL = 2 mA VDD = 1.2 V, IOL = 1 mA 0.3 V 0.1 V VDD = 0.9 V, IOL = 500 µA 4 RESET only VDD = 0.4 V, IOL = 5 µA Submit Documentation Feedback Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIT– VIT – (S) VHYS 0.854 0.86 0.866 1.133 1.142 1.151 1.423 1.434 1.445 TPS31xxE16 1.512 1.523 1.534 TPS31xxH20 1.829 1.843 1.857 TA = 25°C 2.905 2.941 2.970 TA = Full Range 2.867 VDD ≥ 0.8 V, TA = 25°C 0.540 0.551 0.569 VDD ≥ 0.8 V, TA = Full Range 0.530 0.551 0.575 TA = 25°C SENSE, PFI Hysteresis at VDD input 20 1.6 V ≤ VIT < 2.4 V 30 2.5 V ≤ VIT < 3.3 V 60 Temperature coefficient of VIT–, PFI, SENSE TA = –55°C to 125°C VHYS Hysteresis at SENSE, PFI input VDD ≥ 0.8 V High-level input current IIL Low-level input current IOH High-level output current at RESET (3) IDD –0.012 mV –30 25 SENSE, PFI, WDI SENSE, PFI, WDI = VDD, VDD = 3.3 V –25 25 MR MR = 0 V, VDD = 3.3 V –47 SENSE, PFI, WDI SENSE, PFI, WDI = 0 V, VDD = 3.3 V –25 Open drain VDD = VIT + 0.2 V, VOH = 3.3 V –33 (3) nA –25 µA 25 nA 200 nA VDD > VIT (average current), VDD < 1.8 V 1.2 3 VDD > VIT (average current), VDD > 1.8 V 2 4.5 Internal pullup resistor at MR (2) %/K 15 MR = VDD, VDD = 3.3 V µA 29 VDD < VIT, VDD > 1.8 V (1) V –0.019 VDD < VIT, VDD < 1.8 V CI V mV MR Supply current UNIT 3.005 0.8 V ≤ VIT < 1.5 V T(K) IIH MAX TPS31xxE12 TPS31xxK33 Negative-going input threshold voltage (2) TYP TPS31xxE09 TPS31xxE15 Negative-going input threshold voltage (1) MIN 32 70 Input capacitance at MR, SENSE, PFI, WDI VI = 0 V to VDD 100 130 kΩ 1 pF To ensure the best stability of the threshold voltage, a bypass capacitor (ceramic, 0.1 µF) should be placed close to the supply terminals. To ensure the best stability of the threshold voltage, a bypass capacitor (ceramic, 0.1 µF) should be placed close to the supply terminals. Also refers to RSTVDD and RSTSENSE. SWITCHING CHARACTERISTICS RL = 1 MΩ, CL = 50 pF, and TA = –55°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 65 130 195 ms td Delay time VDD ≥ 1.1 × VIT, MR = 0.7 × VDD, See Timing Diagrams tPHL Propagation delay time, VDD to RESET or high-to-low-level output RSTVDD delay VIH = 1.1 × VIT, VIL = 0.9 × VIT 40 µs tPHL Propagation delay time, SENSE to RESET or high-to-low-level output RSTSENSE delay VDD ≥ 0.8 V, VIH = 1.1 × VIT, VIL = 0.9 × VIT 40 µs tPHL Propagation delay time, PFI to PFO delay high-to-low-level output VDD ≥ 0.8 V, VIH = 1.1 × VIT, VIL = 0.9 × VIT 40 µs tPLH Propagation delay time, PFI to PFO delay low-to-high-level output VDD ≥ 0.8 V, VIH = 1.1 × VIT, VIL = 0.9 × VIT 300 µs Submit Documentation Feedback 5 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 SWITCHING CHARACTERISTICS (continued) RL = 1 MΩ, CL = 50 pF, and TA = –55°C to 125°C (unless otherwise noted) PARAMETER tPHL TEST CONDITIONS Propagation delay time, MR to RESET, high_to_low-level RSTVDD, output RSTSENSE delay MIN TYP MAX 1 5 VDD ≥ 1.1 × VIT, VIL = 0.3 × VDD, VIH = 0.7 × VDD UNIT µs TIMING REQUIREMENTS RL = 1 MΩ, CL = 50 pF, and TA = –55°C to 125°C (unless otherwise noted) PARAMETER tT(OUT) tW Time-out period Pulse width TEST CONDITIONS MIN TYP MAX UNIT 0.55 1.1 1.65 s at WDI VDD ≥ 0.85 V at VDD VIH = 1.1 × VIT, VIL = 0.9 × VIT–, VIT– = 0.86 V 20 at MR VDD ≥ VIT + 0.2 V, VIL = 0.3 × VDD, VIH = 0.7 × VDD 0.1 at SENSE VDD ≥ VIT, VIH = 1.1 × VIT – (S), VIL = 0.9 × VIT – (S) 20 at PFI VDD ≥ 0.85 V, VIH = 1.1 × VIT – (S), VIL = 0.9 × VIT – (S) 20 at WDI VDD ≥ VIT, VIL = 0.3 × VDD, VIH = 0.7 × VDD 0.3 FUNCTIONAL BLOCK DIAGRAMS TPS3103 VDD VIT+ _ MR Reset Logic and Timer + _ PFI 0.551 V GND 6 Submit Documentation Feedback RESET PFO µs Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 FUNCTIONAL BLOCK DIAGRAMS (continued) TPS3106 VDD VIT- + _ MR Reset Logic and Timer + _ SENSE RSTVDD Reset Logic and Timer RSTSENSE 0.551 V GND TPS3110 VDD VIT- + _ MR RESET Reset Logic and Timer + _ SENSE 0.551 V Watchdog Logic and Control WDI GND Table 1. TPS3103 FUNCTION TABLE (1) MR V(PFI) > 0.551 V VDD > VIT RESET PFO L 0 X (1) L L L 1 X L H H 0 0 L L H 0 1 H L H 1 0 L H H 1 1 H H X = Don’t care Submit Documentation Feedback 7 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 Table 2. TPS3106 FUNCTION TABLE (1) MR V(SENSE) > 0.551 V VDD > VIT RSTVDD RSTSENSE L X (1) X L L H 0 0 L L H 0 1 H L H 1 0 L H H 1 1 H H X = Don’t care Table 3. TPS3110 FUNCTION TABLE (1) (1) (2) 8 MR V(SENSE) > 0.551 V VDD > VIT RESET L X (2) X L H 0 0 L H 0 1 L H 1 0 L H 1 1 H Function of watchdog timer not shown X = Don’t care Submit Documentation Feedback Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 TIMING DIAGRAMS VDD VIT 0.4 V t td SENSE VIT-(S) = 0.551 V td td td td t t RESET Output Condition Undefined Output Condition Undefined t MR t PFI VIT-(S) = 0.551 V t PFO Output Condition Undefined Output Condition Undefined t Figure 1. TPS3103 Timing Submit Documentation Feedback 9 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 TIMING DIAGRAMS (continued) VDD VIT 0.4 V td t td RSTVDD Output Condition Undefined Output Condition Undefined t SENSE VIT-(S) = 0.551 V RSTSENSE t td Output Condition Undefined Output Condition Undefined td t MR t Figure 2. TPS3106 Timing 10 Submit Documentation Feedback Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 TIMING DIAGRAMS (continued) VDD VIT 0.4 V td t SENSE VIT-(S) = 0.551 V td td td t td RESET td Output Condition Undefined Output Condition Undefined t(TOUT) WDI x = Don’t Care MR t Figure 3. TPS3110 Timing Submit Documentation Feedback 11 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 TYPICAL CHARACTERISTICS TPS3110E09 SUPPLY CURRENT vs SUPPLY VOLTAGE TPS3110E09 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 20 0.30 TA = 85°C 16 TA = 25°C 14 TA = 0°C VOL - Low-Level Output Voltage - V IDD - Supply Current - mA 18 SENSE = VDD MR = Open RESET = Open WDI: Triggered 12 10 TA = -40°C 8 6 4 VDD = 0.9 V SENSE = GND MR = GND WDI = GND 0.25 0.20 TA = 85°C TA = 25°C 0.15 TA = 0°C 0.10 TA = -40°C 0.05 2 0 0 0.5 1.0 1.5 2.0 2.5 VDD - Supply Voltage - V 0 3.0 Figure 5. TPS3110E09 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT TPS3110E09 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT TA = 85°C VOH - High-Level Output Voltage - V 0.8 TA = 25°C 0.7 0.6 TA = 0°C 0.5 TA = -40°C 0.4 0.3 0.2 0.85 TA = 85°C 0.80 0.75 TA = 25°C TA = 0°C 0.70 VDD = 0.9 V SENSE = VDD MR = VDD WDI: Triggered 0.65 0.1 0 2 4 6 8 10 12 14 16 18 20 0.60 0 IOL - Low-Level Output Current - mA Figure 6. 12 2.0 0.90 VDD = 3.3 V SENSE = GND MR = GND WDI = GND 0.9 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 IOL - Low-Level Output Current - mA Figure 4. 1.0 VOL - Low-Level Output Voltage - V 0 -0.1 TA = -40°C -0.2 -0.3 Figure 7. Submit Documentation Feedback -0.4 IOH - High-Level Output Current - mA -0.5 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 TYPICAL CHARACTERISTICS (continued) TPS3110K33 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT MINIMUM PULSE DURATION AT VDD vs THRESHOLD OVERDRIVE VOLTAGE 50 3.2 tW - Minimum Pulse Duration at VDD - ms VDD = 3.3 V SENSE = VDD MR = VDD WDI: Triggered 3.0 TA = -40°C 2.8 TA = 0°C 2.6 TA = 25°C 2.4 TA = 85°C 2.2 2.0 MR: Open SENSE = VDD 45 40 35 30 VDD = 3.3 V 25 20 15 10 VDD = 0.9 V 5 0 0 -5 -10 -15 -20 0 -25 0.1 0.2 0.3 0.4 0.5 VDD - Threshold Overdrive Voltage - V IOH - Low-Level Output Current - mA Figure 8. Figure 9. NORMALIZED THRESHOLD VOLTAGE vs FREE-AIR TEMPERATURE 1.008 VIT - Normalized Threshold Voltage - V VOH - High-Level output Voltage - V 3.4 1.006 1.004 1.002 1.000 0.998 0.996 0.994 0.992 -50 0 50 100 TA - Free-Air Temperature - °C Figure 10. Submit Documentation Feedback 13 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 APPLICATION INFORMATION The TPS31xx family has a quiescent current in the 1-µA to 2-µA range. When RESET is active, triggered by the voltage monitored at VDD, the quiescent current increases to about 20 µA (see the Electrical Characteristics). In some applications, it is necessary to minimize the quiescent current even during the reset period. This is especially true when the voltage of a battery is supervised and the RESET is used to shut down the system or for an early warning. In this case, the reset condition lasts for a longer period of time. The current drawn from the battery should almost be zero, especially when the battery is discharged. For this kind of application, either the TPS3103 or TPS3106 is a good fit. To minimize current consumption, select a version where the threshold voltage is lower than the voltage monitored at VDD. The TPS3106 has two reset outputs. One output (RSTVDD) is triggered from the voltage monitored at VDD. The other output (RSTSENSE) is triggered from the voltage monitored at SENSE. In the application shown in Figure 11, the TPS3106E09 is used to monitor the input voltage of two NiCd or NiMH cells. The threshold voltage (V(TH) = 0.86 V) was chosen as low as possible to ensure that the supply voltage is always higher than the threshold voltage at VDD. The voltage of the battery is monitored using the SENSE input. The voltage divider was calculated to assert a reset using the RSTSENSE output at 2 × 0.8 V = 1.6 V. R1 + R2 ǒ Ǔ VTRIP *1 VIT(S) (1) where: VTRIP is the voltage of the battery at which a reset is asserted and VIT(S) is the threshold voltage at SENSE = 0.551 V. R1 was chosen for a resistor current in the 1-µA range. With VTRIP = 1.6 V: R1 ≈ 1.9 × R2 R1 = 820 kΩ, R2 = 430 kΩ VDD R1 TPS3106E09DBV R3 MR RSTVDD SENSE RSTSENSE 2 Cell NiMH R2 Reset Output GND Figure 11. Battery Monitoring with 3-µA Supply Current for Device and Resistor Divider 14 Submit Documentation Feedback Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 APPLICATION INFORMATION (continued) Watchdog The TPS3110 device integrates a watchdog timer that must be periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, RESET becomes active for the time period (tD). This event also reinitializes the watchdog timer. Manual Reset (MR) Many µC-based products require manual-reset capability, allowing an operator or logic circuitry to initiate a reset. Logic low at MR asserts reset. Reset remains asserted while MR is low and for a time period (tD) after MR returns high. The input has an internal 100-kΩ pullup resistor, so it can be left open if it is unused. Connect a normally open momentary switch from MR to GND to create a manual reset function. External debounce is not required. If MR is driven from long cables or if the device is used in noisy environments, connecting a 0.1-µF capacitor from MR to GND provides additional noise immunity. PFI, PFO The TPS3103 has an integrated power-fail input (PFI) comparator with a separate open-drain power-fail output (PFO). The PFI and PFO can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply. An additional comparator is provided to monitor voltages other than the nominal supply voltage. The PFI is compared with an internal voltage reference of 0.551 V. If the input voltage falls below the power-fail threshold (VIT – (S)), the PFO goes low. If it goes above 0.551 V plus approximately 15-mV hysteresis, the output returns to high. By connecting two external resistors, it is possible to supervise any voltage above 0.551 V. The sum of both resistors should be approximately 1 MΩ, to minimize power consumption and to ensure that the current into the PFI pin can be neglected, compared with the current through the resistor network. The tolerance of the external resistors should be not more than 1% to ensure minimal variation of sensed voltage. If the power-fail comparator is unused, connect PFI to GND and leave PFO unconnected. For proper operation of the PFI comparator, the supply voltage (VDD) must be higher than 0.8 V. SENSE The voltage at the SENSE input is compared with a reference voltage of 0.551 V. If the voltage at SENSE falls below the sense-threshold (VIT–(S)), reset is asserted. On the TPS3106, a dedicated RSTSENSE output is available. On the TPS3110, the logic signal from SENSE is OR-wired with the logic signal from VDD or MR. An internal timer delays the return of the output to the inactive state, once the voltage at SENSE goes above 0.551 V plus about 15 mV of hysteresis. For proper operation of the SENSE comparator, the supply voltage must be higher than 0.8 V. 2V VDD R1 PFI VDD (1) TPS3103H20 MR R2 (1) RESET PFO GND MSP430 Low-Power mC Px.x RESET Analog Circuit Py.x GND -2 V V(NEG_TH) = 0.551 V - R2 (VDD - 0.551 V) R1 (1) Resistor may be integrated in mC. Figure 12. TPS3103 Monitoring a Negative Voltage Submit Documentation Feedback 15 Production Data TPS3103xxx-EP TPS3106xxx-EP TPS3110xxx-EP www.ti.com SLVS686 – OCTOBER 2006 APPLICATION INFORMATION (continued) 3.3 V 1.5 V VCORE VDD V(CORE_TH) = 0.551 V x R1 + R2 R2 R1 TPS3110K33 MR RESET SENSE WDI R2 GND VIO DSP RESET Px.y GND GND Figure 13. TPS3110 in a DSP System Monitoring Both Supply Voltages 16 Submit Documentation Feedback PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TPS3106K33MDBVREP ACTIVE SOT-23 DBV 6 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM V62/06643-07XE ACTIVE SOT-23 DBV 6 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 6-Aug-2008 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS3106K33MDBVREP Package Package Pins Type Drawing SPQ SOT-23 3000 DBV 6 Reel Reel Diameter Width (mm) W1 (mm) 180.0 9.0 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) 3.15 3.2 1.4 4.0 W Pin1 (mm) Quadrant 8.0 Q3 PACKAGE MATERIALS INFORMATION www.ti.com 6-Aug-2008 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS3106K33MDBVREP SOT-23 DBV 6 3000 182.0 182.0 20.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP® Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com Wireless www.ti.com/wireless-apps RF/IF and ZigBee® Solutions www.ti.com/lprf TI E2E Community Home Page e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2011, Texas Instruments Incorporated