TPS79718 TPS79730 TPS79733 Actual Size (2,15 mm x 2,3 mm) SLVS332B – MARCH 2001 – REVISED JUNE 2001 ULTRALOW-POWER SC70/SOT-323 PACKAGED 10 mA LDO LINEAR REGULATORS WITH POWER GOOD OUTPUT element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low, typically 105 mV at 10 mA of load current, and is directly proportional to the load current. The quiescent current is ultralow (1.2 µA typically) and is stable over the entire range of output load current (0 mA to 10 mA). When properly configured with a pullup resistor, the PG output can be used to implement a power-on reset or low battery indicator. The TPS797xx is offered in 1.8-V, 3-V, 3.3-V fixed options. FEATURES D 10-mA Low-Dropout Regulator D Ultralow 1.2-µA Quiescent Current at 10 mA D 5-Pin SC70/SOT-323 (DCK) Package D Integrated Power Good Output D Stable With Any Capacitor (>0.47 µF) D Dropout Voltage Typically 105 mV at 10 mA D D (TPS79733) Over Current Limitation –40°C to 85°C Operating Junction Temperature Range DCK PACKAGE (TOP VIEW) APPLICATIONS D Battery Powered Microcontrollers and Microprocessors PG 1 GND 2 NC 3 DESCRIPTION OUT 4 IN TPS79733 GROUND CURRENT vs FREE-AIR TEMPERATURE 2 1.75 Ground Current – µ A The TPS797xx family of low-dropout (LDO) voltage regulators offers the benefits of low-dropout voltage and ultralow-power operation. The device is stable with any capacitor (>0.47 µF). Therefore, implementations of this device require very little board space due to the miniaturized packaging and potentially small output capacitor. In addition, the family includes an integrated open drain active-high power good (PG) output. Intended for use in microcontroller based, battery-powered applications, the TPS797xx family’s low dropout and ultralow-powered operation results in a significant increase in system battery operating life. The small packaging minimizes consumption of board space. 5 1.50 VI = 4.3 V VO = 3.3 V Co = 1 µF IO = 10 mA 1.25 1 0.75 The device is enabled when the applied voltage exceeds the minimum input voltage. The usual PNP pass transistor has been replaced by a PMOS pass 0.50 –40 –15 10 35 60 TA – Free-Air Temperature – °C 85 Please be aware that an important notice concerning availability, standard warranty, and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. Copyright 2001, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. www.ti.com 1 TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 AVAILABLE OPTIONS† TA VOLTAGE PACKAGE 1.8 V –40°C 40 C to 85°C 85 C 3V SC70/SOT-323 SC70/SOT 323 (DCK) 3.3 V PART NUMBER TPS79718DCKT‡ TPS79718DCKR§ TPS79730DCKT‡ TPS79730DCKR§ TPS79733DCKT‡ TPS79733DCKR§ SYMBOL ATD ATE ATF † Contact the factory for the availability of other voltage options between 1.25 V and 4.9 V. ‡ The DCKT indicates tape and reel of 250 parts. § The DCKR indicates tape and reel of 3000 parts. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)¶ Input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 6 V Maximum dc output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9 V Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV ESD rating, CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 V Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C Operating ambient temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C ¶ 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. NOTE 1: All voltage values are with respect to network ground terminal. DISSIPATION RATING TABLE TA ≤ 25°C POWER RATING TA = 70°C POWER RATING TA = 85°C POWER RATING 2.52 mW/°C 252mW 139 mW 101 mW 3.18 mW/°C 318 mW 175 mW BOARD PACKAGE RθJC °C/W RθJA °C/W DERATING FACTOR ABOVE TA = 25°C Low K# High K|| DCK 165.39 396.24 DCK 165.39 314.74 127 mW # The JEDEC Low K (1s) board design used to derive this data was a 3 inch x 3 inch, two layer board with 2 ounce copper traces on top of the board. || The JEDEC High K (2s2p) board design used to derive this data was a 3 inch x 3 inch, multilayer board with 1 ounce internal power and ground planes and 2 ounce copper traces on top and bottom of the board. 2 www.ti.com TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 electrical characteristics over recommended operating free-air temperature range, VI = VO(typ) + 1 V, IO = 1 mA, Co = 1 µF (unless otherwise noted) PARAMETER TEST CONDITIONS IO = 3 mA IO = 10 mA VI Input voltage (see Note 2) IO TJ Continuous output current (see Note 3) Operating junction temperature, TJ Out ut voltage (10 µA to 10 mA Load) Output (see Note 4) TPS79718 2.8 V < VI < 5.5 V TPS79730 TA = 25°C, TA = –40°C to 85°C, 4 V < VI < 5.5 V TPS79733 TA = 25°C, TA = –40°C to 85°C, 4.3 V < VI < 5.5 V TA = 25°C, TA = –40°C to 85°C, 0 µA < IO < 10 mA Load regulation Output voltage line regulation (∆VO/VO) (see Note 4) Output noise voltage (TPS79718) Output current limit PG leakage current 4 V < VI < 5.5 V 4.3 V < VI < 5.5 V UNIT 5.5 2 5.5 V 0 10 mA V 85 °C 1.8 1.728 1.872 V 3.0 2.880 3.120 V 3.3 3.168 3.432 1.2 IO = 10 mA IO = 1 µA to 10 mA 2 TA = 25°C, VO + 1 V < VI ≤ 5.5 V, TA = 25°C VO + 1 V < VI ≤ 5.5 V, TA = –40°C to 85°C 0.15 17 BW = 200 Hz to 100 kHz, Co = 10 µF, IO = 10 mA, TA = 25°C 600 190 Co = 10 µF, TA = 25°C 50 IO = 10 mA, IO = 10 mA, TA = 25°C TA = –40°C to 85°C 110 TPS79730 TA = 25°C TA = –40°C to 85°C 105 TPS79733 IO = 10 mA, IO = 10 mA, IO(PG) = 100µA, VO decreasing V(PG) ≥ 0.8 V 1.2 VI = 1.5 V, V(PG) = 5 V IO(PG) = 1 mA V µA A mV 0.8 See Note 4 Dropout voltage (see Note 5) PG output low voltage 2.8 V < VI < 5.5 V MAX 1.8 VO = 0 V, f = 100 Hz, IO = 10 mA, Power supply ripple rejection (TPS79718) PG trip threshold voltage TYP -40 TA = 25°C, TA = –40°C to 85°C, Quiescent current (GND current) (see Note 4) Minimum input voltage for valid PG MIN %/V µVRMS 300 mA dB 200 mV 200 82 0.1 V 90 96 0.14 0.225 %VO V nA NOTES: 2. To calculate the minimum input voltage for your maximum output current, use the following formula: VI(min) = VO(max) + VDO (max load) 3. Continuous output current is limited by internal protection circuitry, but it is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time. 4. The minimum IN operating voltage is 1.8 V or VO (typ) + 1 V, whichever is greater. The maximum IN voltage is 5.5 V. There is no minimum output current requirement and the maximum output current is 10 mA. 5. IN voltage equals VO(typ) –100 mV; The TPS79730 input voltage is set to 2.9 V and the TPS79733 input voltage is set to 3.2 V. The TPS79718 dropout voltage is limited by input voltage range limitations. www.ti.com 3 TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 functional block diagram VOUT VIN Current Sense ILIM _ R1 + GND R2 Bandgap Reference VIN Vref = 1.235 V PG Delay Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION GND 2 NC 3 OUT 5 O The OUT terminal provides the regulated output voltage of the device. PG 1 O The PG terminal for the fixed voltage option devices is an open drain, active-high output that indicates the status of VO (output of the LDO). When VO exceeds approximately 90% of the regulated voltage, PG goes to a high impedance state. It goes to a low-impedance state when VO falls below approximately 90% (i.e. overload condition) of the regulated voltage. The open drain output of the PG terminal requires a pullup resistor. IN 4 I The IN terminal is the power supply input to the device. 4 Ground No connection www.ti.com TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 TPS797xx PG timing diagram VIN Vmin (see Note A) t VOUT Threshold Voltage VIT – (see Note B) VIT + (see Note B) t PG Output t NOTES: A. Vmin = VOUT + VDO B. The PG trip voltage is typically 10% lower than the output voltage (90%VO). VIT– to VIT+ is the hysteresis voltage. www.ti.com 5 TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 TYPICAL CHARACTERISTICS TPS79733 TPS79718 TPS79733 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE VI = 4.3 V Co = 1 µF TA = 25°C VI = 2.8 V Co = 1 µF TA = 25°C 3.305 3.300 3.295 3.33 1.805 1.800 1.795 1.790 3.290 VI = 4.3 V Co = 1 µF 3.34 V O – Output Voltage – V 1.810 V O – Output Voltage – V 3.310 V O – Output Voltage – V 3.35 1.815 3.315 3.32 3.31 IO = 1 mA 3.30 3.29 IO = 10 mA 3.28 3.27 3.26 1.785 3.285 0 2 4 6 8 IO – Output Current – mA 3.25 0 10 2 4 6 8 IO – Output Current – mA –15 10 35 60 TA – Free-Air Temperature – °C 85 Figure 3 Figure 2 Figure 1 TPS79718 TPS79733 TPS79718 OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE GROUND CURRENT vs FREE-AIR TEMPERATURE OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY Ground Current – µ A 1.75 1.81 IO = 1 mA 1.80 IO = 10 mA 1.79 1.50 VI = 4.3 V VO = 3.3 V Co = 1 µF IO = 10 mA Output Spectral Noise Density – nV/ VI = 2.8 V Co = 1 µF Hz 2 1.82 V O – Output Voltage – V –40 10 1.25 1 0.75 1.78 –40 –15 10 35 60 TA – Free-Air Temperature – °C 85 0.50 –40 VI = 2.8 V VO = 1.8 V Co = 1 µF 8 IO = 10 mA 6 IO = 1 mA 4 2 0 85 –15 10 35 60 TA – Free-Air Temperature – °C 10 100 1k 10 k f – Frequency – Hz Figure 5 Figure 4 100 k Figure 6 TPS79733 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE OUTPUT IMPEDANCE vs FREQUENCY V DO – Dropout Voltage – mV Zo – Output Impedance –Ω 30 120 IO = 1 mA 25 20 IO = 10 mA 15 10 7 VI = 3.2 V Co = 1 µF 100 IO = 10 mA 80 60 40 5 VI 4 3 VO 2 1 IO = 1 mA 20 5 VO = 3.3 V RL = 330 Ω 6 V – Output Voltage – V O V – Input Voltage – V I VI = 4.3 V VO = 3.3 V Co = 1 µF TJ = 25°C 35 0 0 10 100 1k 10k 100k f – Frequency – Hz Figure 7 6 POWER UP / POWER DOWN 140 40 1M 10 M 0 –40 –25 –10 5 20 35 50 TA – Free-Air Temperature – °C Figure 8 www.ti.com 65 80 0 10 20 30 40 50 60 70 80 90 100 t – Time – ms Figure 9 TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 TPS79718 TPS79718 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE ∆ V – Change In O Output Voltage – mV dv 0.14 V = dt µs 3.8 2.8 50 Current Load – mA IO = 10 mA VO = 1.8 V Co = 4.7 µF 100 0 50 –100 100 50 0 –50 VI = 2.8 V VO = 1.8 V Co = 4.7 µF –100 10 5 1 mA 0 0 100 200 300 400 500 600 700 800 900 1 k 0 200 400 600 800 1 k 12 t – Time – µs Figure 10 18 TPS79733 TPS79733 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE VI = 4.3 V Co = 4.7 µF IO = 10 mA Co = 4.7 µF 5.3 2k Figure 11 100 50 0 4.3 I O – Output Current – mA V – Output Voltage – mV V – Input Voltage – V O I 14 16 t – Time – µs dv 0.14 V = dt µs 200 –50 –100 10 100 0 –100 –200 5 1 mA 0 0 0 100 200 300 400 500 600 700 800 900 1 k ∆ V – Change In O Output Voltage – mV V – Output Voltage – mV V – Input Voltage – V O I TYPICAL CHARACTERISTICS 200 400 600 800 1 k 12 14 16 18 2k t – Time – µs t – Time – µs Figure 12 Figure 13 www.ti.com 7 TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 APPLICATION INFORMATION The TPS797xx family of low-dropout (LDO) regulators have been optimized for use in micropower applications. They feature extremely low dropout voltages, and ultralow quiescent current (1.2 µA typically). A typical application circuit is shown in Figure 16. TPS797xx 4 IN PG 1 100 kΩ + C1 0.1 µF – OUT 5 VO 3 NC GND + 0.47 µF 2 Figure 14. Typical Application Circuit external capacitor requirements Although not required, a 0.1-µF or larger input bypass capacitor, connected between IN and GND and located close to the TPS797xx, is recommended, especially when a highly resistive power supply is powering the LDO in addition to other devices. Like all low-dropout regulators, the TPS797xx requires an output capacitor connected between OUT and GND to stabilize the internal control loop. The minimum recommended capacitance is 0.47 µF. Any 0.47-µF capacitor is suitable. Capacitor values larger than 0.47 µF are acceptable. 8 www.ti.com TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 APPLICATION INFORMATION power dissipation and junction temperature Specified regulator operation is assured to a junction temperature of 85°C; restrict the maximum junction temperature to 85°C under normal operating conditions. This restriction limits the power dissipation the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than or equal to PD(max). The maximum-power-dissipation limit is determined using the following equation: P D(max) T max * T A + J R θJA Where: TJmax is the maximum allowable junction temperature. RθJA is the thermal resistance junction-to-ambient for the package (see Power Dissipation Rating Table). TA is the ambient temperature. The regulator dissipation is calculated using: P D ǒ Ǔ + V *V I O I O Power dissipation resulting from quiescent current is negligible. Excessive power dissipation triggers the thermal protection circuit. regulator protection The TPS797xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might be appropriate. The TPS797xx features internal current limiting. During normal operation, the TPS797xx limits output current to approximately 190 mA. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. Take care not to exceed the power dissipation ratings of the package. microcontroller application One application for which this device is particularly suited is providing a regulated input voltage and power good (PG) supervisory signal to low-power devices such as mixed-signal microcontrollers. The quiescent or ground current of the TPS797xx family is typically 1.2 µA even at full load; therefore, the reduction in battery life by including the TPS797xx in the system is negligible. The primary benefits of using the TPS797xx to power low power digital devices include: D Regulated output voltage that protects the device from battery droop and noise on the line (e.g., switch D D D D bounce) Smooth, monotonic power up PG signal for controlled device RESET Potential to use an existing 5-V power rail to power a 3.3-V or lower device Potential to provide separate digital and analog power and ground supplies for a system with only one power source www.ti.com 9 TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 APPLICATION INFORMATION microcontroller application (continued) Figure 17 shows an application in which the TPS79718 is used to power TI’s MSP430 mixed signal microcontroller. VOUT VIN 1.8 V + 0.47 µF TPS79718 – VCC MSP430 or Equivalent 0.1 µF PG RESET VSS GND Figure 15. MSP430 Microcontroller Powered by the TPS79718 Regulator Minimal board space is needed to accommodate the DCK (SC70/SOT-323) packaged TPS79718, the 0.1-µF output capacitor, the 0.47-µF input capacitor, and the pullup resistor on the PG pin. 10 www.ti.com TPS79718 TPS79730 TPS79733 SLVS332B – MARCH 2001 – REVISED JUNE 2001 MECHANICAL DATA DCK (R-PDSO-G5) PLASTIC SMALL-OUTLINE 0,30 0,15 0,65 5 0,10 M 4 1,40 1,10 1 0,13 NOM 2,30 1,90 3 Gage Plane 2,15 1,85 0,15 0°–8° 0,46 0,26 Seating Plane 1,10 0,80 0,10 0,00 0,10 4093553/B 06/99 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion. Falls within JEDEC MO-203 www.ti.com 11 PACKAGE OPTION ADDENDUM www.ti.com 11-Feb-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TPS79718DCKR ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TPS79718DCKT ACTIVE SC70 DCK 5 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TPS79730DCKR ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TPS79730DCKT ACTIVE SC70 DCK 5 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TPS79733DCKR ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TPS79733DCKT ACTIVE SC70 DCK 5 250 CU NIPDAU Level-1-260C-UNLIM Green (RoHS & no Sb/Br) 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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). 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. Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry 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. 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