LD2981CM33TR

LD2981 Ultra low-drop voltage regulators with inhibit Datasheet - production data Description The LD2981 is a 100 mA fixed-output voltage regulator. The low-drop voltage and the ultra low quiescent current make them suitable for low noise, low power applications and in battery powered systems. Features            Ultra low dropout voltage (0.17 V typ. at 100 mA load, 7 mV typ. at 1 mA load) Very low quiescent current (80 μA typ. at no load in on mode; max 1 μA in off mode) Guaranteed output current up to 100 mA Logic-controlled electronic shutdown Output voltage of 2.5; 3.0; 3.3; 5.0 V Internal current and thermal limit ± 0.75% tolerance output voltage available (A version) Output low noise voltage 160 μVRMS Temperature range: -40 to 125 °C Small package SOT23-5L and SOT-89 Fast dynamic response to line and load changes April 2016 The quiescent current in sleep mode is less than 1 μA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin n° 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD2981 is designed to work with low ESR ceramic capacitor. Typical applications are in cellular phone, palmtop/laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera. DocID6279 Rev 17 This is information on a product in full production. 1/27 www.st.com Contents LD2981 Contents 1 Diagram ............................................................................................ 5 2 Pin configuration ............................................................................. 6 3 Maximum ratings ............................................................................. 7 4 5 Typical application .......................................................................... 8 Electrical characteristics ................................................................ 9 6 Typical performance characteristics ........................................... 12 7 Application notes .......................................................................... 16 8 7.1 External capacitors.......................................................................... 16 7.2 Input capacitor................................................................................. 16 7.3 Output capacitor .............................................................................. 16 7.4 Important ......................................................................................... 16 7.5 Inhibit input operation ...................................................................... 16 7.6 Reverse current............................................................................... 17 Package information ..................................................................... 18 8.1 SOT-89 package information .......................................................... 18 8.2 SOT-89 packing information............................................................ 21 8.3 SOT23-5L package information ...................................................... 22 8.4 SOT23-5L packing information........................................................ 24 9 Ordering information..................................................................... 25 10 Revision history ............................................................................ 26 2/27 DocID6279 Rev 17 LD2981 List of tables List of tables Table 1: Pin description .............................................................................................................................. 6 Table 2: Thermal data ................................................................................................................................. 6 Table 3: Absolute maximum ratings ........................................................................................................... 7 Table 4: Electrical characteristics for LD2981AB ....................................................................................... 9 Table 5: Electrical characteristics for LD2981C ........................................................................................ 10 Table 6: SOT-89 mechanical data ............................................................................................................ 19 Table 7: SOT-89 carrier tape mechanical data ......................................................................................... 21 Table 8: SOT23-5L package mechanical data ......................................................................................... 22 Table 9: SOT23-5L tape and reel mechanical data .................................................................................. 24 Table 10: Order codes .............................................................................................................................. 25 Table 11: Document revision history ........................................................................................................ 26 DocID6279 Rev 17 3/27 List of figures LD2981 List of figures Figure 1: Schematic diagram ...................................................................................................................... 5 Figure 2: Pin connections (top view) ........................................................................................................... 6 Figure 3: Application circuit ......................................................................................................................... 8 Figure 4: Output voltage vs temperature .................................................................................................. 12 Figure 5: Dropout voltage vs temperature ................................................................................................ 12 Figure 6: Line regulation vs temperature .................................................................................................. 12 Figure 7: Load regulation vs temperature ................................................................................................. 12 Figure 8: Dropout voltage vs temperature ................................................................................................ 13 Figure 9: Quiescent current vs temperature ............................................................................................. 13 Figure 10: Quiescent current vs output current ........................................................................................ 13 Figure 11: Off mode quiescent current vs temperature ............................................................................ 13 Figure 12: Quiescent current vs input voltage .......................................................................................... 13 Figure 13: Dropout voltage vs output current ........................................................................................... 13 Figure 14: Inhibit input current vs temperature ......................................................................................... 14 Figure 15: Inhibit voltage vs temperature ................................................................................................. 14 Figure 16: Supply voltage rejection vs frequency ..................................................................................... 14 Figure 17: Noise voltage vs frequency ..................................................................................................... 14 Figure 18: Best case: highest output version ........................................................................................... 14 Figure 19: Worst case: lowest output version ........................................................................................... 14 Figure 20: Load transient response .......................................................................................................... 15 Figure 21: Line transient response ........................................................................................................... 15 Figure 22: Reverse current test circuit ...................................................................................................... 17 Figure 23: SOT-89 package outline .......................................................................................................... 18 Figure 24: SOT-89 recommended footprint .............................................................................................. 20 Figure 25: SOT-89 carrier tape outline ..................................................................................................... 21 Figure 26: SOT23-5L package outline ...................................................................................................... 22 Figure 27: SOT23-5L recommended footprint .......................................................................................... 23 Figure 28: SOT23-5L tape and reel outline .............................................................................................. 24 4/27 DocID6279 Rev 17 LD2981 1 Diagram Diagram Figure 1: Schematic diagram DocID6279 Rev 17 5/27 Pin configuration 2 LD2981 Pin configuration Figure 2: Pin connections (top view) Table 1: Pin description Pin n° SOT23-5L Pin n° SOT-89 Symbol 1 3 VIN 2 2 GND Input port Ground pin 3 INHIBIT 4 NC 5 1 Name and function Control switch ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. Disable the device when connected to GND or to a positive voltage less than 0.18 V Not connected VOUT Output port Table 2: Thermal data Symbol 6/27 Parameter SOT23-5L SOT-89 Unit RthJC Thermal resistance junction-case 81 15 °C/W RthJA Thermal resistance junction-ambient 255 110 °C/W DocID6279 Rev 17 LD2981 3 Maximum ratings Maximum ratings Table 3: Absolute maximum ratings Symbol VI VINH Parameter Value Unit DC input voltage -0.3 to 16 V INHIBIT input voltage -0.3 to 16 V IO Output current Internally limited PD Power dissipation Internally limited TSTG Storage temperature range -55 to 150 °C TOP Operating junction temperature range -40 to 125 °C Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. DocID6279 Rev 17 7/27 Typical application 4 LD2981 Typical application Figure 3: Application circuit Inhibit pin is not internally pulled-up then it must not be left floating. Disable the device when connected to GND or to a positive voltage less than 0.18 V. 8/27 DocID6279 Rev 17 LD2981 5 Electrical characteristics Electrical characteristics (TJ = 25 °C, VI = VO(NOM) + 1 V, CI = 1 μF, CO = 2.2 μF, IO = 1 mA, VINH = 2 V, unless otherwise specified). Table 4: Electrical characteristics for LD2981AB Symbol VOP VO VO VO ΔVO Parameter Test conditions Operating input voltage Output voltage Output voltage Output voltage Min. Typ. 2.5 2.97 3.03 IO = 1 to 100 mA, TJ = -40 to 125 °C 2.925 3.075 IO = 1 mA 3.275 IO = 1 to 100 mA 3.267 3.333 IO = 1 to 100 mA, TJ = -40 to 125 °C 3.217 3.383 IO = 1 mA 4.962 IO = 1 to 100 mA 4.95 5.05 IO = 1 to 100 mA, TJ = -40 to 125 °C 4.875 5.125 VO(NOM) + 1 < VIN < 16 V, IO = 1 mA 3.3 5 0.003 TJ = -40 to 125 °C IO = 1 mA 80 IO = 100 mA 100 250 1000 1 7 IO = 1 mA, TJ = -40 to 125 °C DocID6279 Rev 17 150 400 µA 1300 3 10 15 70 mV 100 150 180 IO = 100 mA, TJ = -40 to 125 °C RL = 0 100 5 IO = 25 mA, TJ = -40 to 125 °C Short circuit current %/V 2 IO = 0, TJ = -40 to 125 °C ISC 0.014 V 0.8 VINH < 0.15 V, TJ = -40 to 125 °C IO = 100 mA 5.038 2600 VINH < 0.3 V IO = 25 mA V 800 OFF MODE IO = 1 mA 3.325 200 IO = 100 mA, TJ = -40 to 125 °C IO = 0 V 150 IO = 1 mA, TJ = -40 to 125 °C IO = 25 mA 3.023 0.032 IO = 25 mA, TJ = -40 to 125 °C Dropout voltage (1) V IO = 1 to 100 mA 3 IO = 0, TJ = -40 to 125 °C VDROP 16 2.977 IO = 0 IQ Unit IO = 1 mA Line regulation Quiescent current ON MODE Max. 250 375 150 mA 9/27 Electrical characteristics Symbol LD2981 Parameter Test conditions Min. Typ. Max. SVR Supply voltage rejection CO = 10 µF, f = 1 KHz VINH Inhibit input logic low LOW = Output OFF, TJ = -40 to 125 °C VINL Inhibit input logic high HIGH = Output ON, TJ = -40 to 125 °C Inhibit input current VINH = 0 V, TJ = -40 to 125 °C 0 -1 IINH VINH = 5 V, TJ = -40 to 125 °C 5 15 eN TSHDN Output noise voltage 63 dB 0.18 1.6 BW = 300 Hz to 50 KHz, CO = 10 µF Thermal shutdown Unit V V µA 160 µVRMS 170 °C Notes: (1) For VO < 2.5 V dropout voltage can be calculated according to the minimum input voltage in full temperature range. (TJ = 25 °C, VI = VO(NOM) +1 V, CI = 1 μF, CO = 2.2 μF, IO = 1 mA, VINH = 2 V, unless otherwise specified) Table 5: Electrical characteristics for LD2981C Symbol Parameter VOP Operating input voltage VO VO VO VO Output voltage Output voltage Output voltage Output voltage Test conditions 10/27 Typ. 2.5 Max. Unit 16 V IO = 1 mA 2.468 IO = 1 to 100 mA 2.45 2.55 IO = 1 to 100 mA, TJ = -40 to 125 °C 2.412 2.587 IO = 1 mA 2.962 IO = 1 to 100 mA 2.94 3.06 IO = 1 to 100 mA, TJ = -40 to 125 °C 2.895 3.105 IO = 1 mA 3.258 IO = 1 to 100 mA 3.234 3.366 IO = 1 to 100 mA, TJ = -40 to 125 °C 3.184 3.415 IO = 1 mA 4.937 IO = 1 to 100 mA IO = 1 to 100 mA, TJ = -40 to 125 °C ΔVO Min. VO(NOM) + 1 < VIN < 16 V, IO = 1 mA Line regulation TJ = -40 to 125 °C DocID6279 Rev 17 2.5 3 3.3 5 2.531 3.037 V 3.341 V 5.062 4.9 5.1 4.825 5.175 0.003 V 0.014 0.032 V %/V LD2981 Electrical characteristics Symbol Parameter Test conditions Min. IO = 0 Typ. Max. 80 100 IO = 0, TJ = -40 to 125 °C 150 IO = 1 mA IQ Quiescent current ON MODE 100 IO = 1 mA, TJ = -40 to 125 °C IO = 25 mA 250 IO = 25 mA, TJ = -40 to 125 °C 400 µA 800 1000 IO = 100 mA, TJ = -40 to 125 °C 1300 2600 VINH < 0.3 V 0.8 OFF MODE VINH < 0.15 V, TJ = -40 to 125 °C 2 IO = 0 1 IO = 0, TJ = -40 to 125 °C 3 5 IO = 1 mA Dropout voltage (1) 150 200 IO = 100 mA VDROP Unit 7 IO = 1 mA, TJ = -40 to 125 °C 10 15 IO = 25 mA 70 IO = 25 mA, TJ = -40 to 125 °C mV 100 150 IO = 100 mA 180 IO = 100 mA, TJ = -40 to 125 °C 250 375 Short circuit current RL = 0 150 mA SVR Supply voltage rejection CO = 10 µF, f = 1 KHz 63 dB VINH Inhibit input logic low LOW = Output OFF, TJ = -40 to 125 °C VINL Inhibit input logic high HIGH = Output ON, TJ = -40 to 125 °C Inhibit input current VINH = 0 V, TJ = -40 to 125 °C 0 -1 IINH VINH = 5 V, TJ = -40 to 125 °C 5 15 ISC eN TSHDN Output noise voltage BW = 300 Hz to 50 KHz, CO = 10 µF Thermal shutdown 0.18 1.6 V V μF 160 µVRMS 170 °C Notes: (1) For VO < 2.5 V dropout voltage can be calculated according to the minimum input voltage in full temperature range. DocID6279 Rev 17 11/27 Typical performance characteristics 6 LD2981 Typical performance characteristics (TJ = 25 °C, VI = VO(NOM) +1 V, CI = 1 μF, CO = 2.2 μF, VINH = 2 V, unless otherwise specified). 12/27 Figure 4: Output voltage vs temperature Figure 5: Dropout voltage vs temperature Figure 6: Line regulation vs temperature Figure 7: Load regulation vs temperature DocID6279 Rev 17 LD2981 Typical performance characteristics Figure 8: Dropout voltage vs temperature Figure 9: Quiescent current vs temperature Figure 10: Quiescent current vs output current Figure 11: Off mode quiescent current vs temperature Figure 12: Quiescent current vs input voltage Figure 13: Dropout voltage vs output current DocID6279 Rev 17 13/27 Typical performance characteristics LD2981 Figure 14: Inhibit input current vs temperature Figure 15: Inhibit voltage vs temperature Figure 16: Supply voltage rejection vs frequency Figure 17: Noise voltage vs frequency Figure 18: Best case: highest output version Figure 19: Worst case: lowest output version 14/27 DocID6279 Rev 17 LD2981 Typical performance characteristics Figure 20: Load transient response Figure 21: Line transient response DocID6279 Rev 17 15/27 Application notes LD2981 7 Application notes 7.1 External capacitors Like any low-dropout regulator, the LD2981 requires external capacitors for regulator stability. This capacitor must be selected to meet the requirements of minimum capacitance and equivalent series resistance. We suggest to solder input and output capacitors as close as possible to the relative pins. 7.2 Input capacitor An input capacitor whose value is 1 μF is required with the LD2981 (amount of capacitance can be increased without limit). This capacitor must be located a distance of not more than 0.5" from the input pin of the device and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitors can be used for this capacitor. 7.3 Output capacitor The LD2981 is designed specifically to work with ceramic output capacitors. It may also be possible to use Tantalum capacitors, but these are not as attractive for reasons of size and cost. By the way, the output capacitor must meet both the requirement for minimum amount of capacitance and ESR (equivalent series resistance) value. The Figure 18: "Best case: highest output version" and Figure 19: "Worst case: lowest output version" show the allowable ESR range as a function of the output capacitance. These curves represent the stability region over the full temperature and IO range. Due to the different loop gain, the stability improves for higher output versions and so the suggested minimum output capacitor value, if low ESR ceramic type is used, is 1 μF for output voltages equal or major than 3.8 V, 2.2 μF for output voltages from 2.85 to 3.3 V, and 3.3 μF for the other versions. However, if an output capacitor lower than the suggested one is used, it’s possible to make stable the regulator adding a resistor in series to the capacitor (see Figure 18: "Best case: highest output version" and Figure 19: "Worst case: lowest output version" to choose the right value according to the used version and keeping in account that the ESR of ceramic capacitors has been measured @ 100 kHz). 7.4 Important The output capacitor must maintain its ESR in the stable region over the full operating temperature to assure stability. Also, capacitor tolerance and variation with temperature must be considered to assure the minimum amount of capacitance is provided at all times. This capacitor should be located not more than 0.5" from the output pin of the device and returned to a clean analog ground. 7.5 Inhibit input operation The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically reducing the current consumption down to less than 1 μA. When the inhibit feature is not used, this pin must be tied to VI to keep the regulator output ON at all times. To assure proper operation, the signal source used to drive the inhibit pin must be able to swing above and below the specified thresholds listed in the electrical characteristics section under VIH VIL. Any slew rate can be used to drive the inhibit. 16/27 DocID6279 Rev 17 LD2981 7.6 Application notes Reverse current The power transistor used in the LD2981 has not an inherent diode connected between the regulator input and output. If the output is forced above the input, no current will flow from the output to the input across the series pass transistor. When a VREV voltage is applied on the output, the reverse current measured, according to the test circuit in Figure 22: "Reverse current test circuit", flows to the GND across the two feedback resistors. This current typical value is 160 μA. R1 and R2 resistors are implanted type; typical values are, respectively, 42.6 kΩ and 51.150 kΩ. Figure 22: Reverse current test circuit DocID6279 Rev 17 17/27 Package information 8 LD2981 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 8.1 SOT-89 package information Figure 23: SOT-89 package outline 18/27 DocID6279 Rev 17 LD2981 Package information Table 6: SOT-89 mechanical data mm Dim. Min. Typ. Max. A 1.40 1.60 B 0.44 0.56 B1 0.36 0.48 C 0.35 0.44 C1 0.35 0.44 D 4.40 4.60 D1 1.62 1.83 D3 0.90 E 2.29 2.60 e 1.42 1.57 e1 2.92 3.07 H 3.94 4.25 H1 2.70 3.10 K 1° 8° L 0.89 120 R 0.25 β 90° DocID6279 Rev 17 19/27 Package information LD2981 Figure 24: SOT-89 recommended footprint 20/27 DocID6279 Rev 17 LD2981 8.2 Package information SOT-89 packing information Figure 25: SOT-89 carrier tape outline Table 7: SOT-89 carrier tape mechanical data mm Dim. Value Tolerance Ao 4.91 ± 0.10 Bo 4.52 ± 0.10 Ko 1.90 ± 0.10 F 5.50 ± 0.10 E 1.75 ± 0.10 W 12 ± 0.30 P2 2 ± 0.10 Po 4 ± 0.10 P1 8 ± 0.10 T 0.30 ± 0.10 D Ø 1.55 ± 0.05 D1 Ø 1.60 ± 0.10 DocID6279 Rev 17 21/27 Package information 8.3 LD2981 SOT23-5L package information Figure 26: SOT23-5L package outline Table 8: SOT23-5L package mechanical data mm Dim. Min. 22/27 Typ. Max. A 0.90 1.45 A1 0 0.15 A2 0.90 1.30 b 0.30 0.50 c 0.09 0.20 D 2.95 E 1.60 e 0.95 H 2.80 L 0.30 0.60 θ 0° 8° DocID6279 Rev 17 LD2981 Package information Figure 27: SOT23-5L recommended footprint Dimensions are in mm DocID6279 Rev 17 23/27 Package information 8.4 LD2981 SOT23-5L packing information Figure 28: SOT23-5L tape and reel outline D A N T Po Bo Ko Ao P Table 9: SOT23-5L tape and reel mechanical data Dim. mm Min. Typ. A 180 C 12.8 D 20.2 N 60 13.0 T 24/27 Max. 13.2 14.4 Ao 3.13 3.23 3.33 Bo 3.07 3.17 3.27 Ko 1.27 1.37 1.47 Po 3.9 4.0 4.1 P 3.9 4.0 4.1 DocID6279 Rev 17 LD2981 9 Ordering information Ordering information Table 10: Order codes AB version C version Output voltage SOT23-5L SOT-89 LD2981ABM30TR SOT23-5L SOT-89 LD2981CM25TR 2.5 V LD2981CM30TR 3.0 V LD2981ABM33TR LD2981ABU33TR LD2981CM33TR LD2981CU33TR 3.3 V LD2981ABM50TR LD2981ABU50TR LD2981CM33TR LD2981CU50TR 5.0 V DocID6279 Rev 17 25/27 Revision history 10 LD2981 Revision history Table 11: Document revision history 26/27 Date Revision Changes 25-Jul-2006 12 Order codes updated. 14-Feb-2008 13 Added: Table 1 on page 1. 14-Jul-2008 14 Modified: Table 1 on page 1 and Table 10 on page 23. 25-Nov-2013 15 Document name changed from LD2981ABxx and LD2981Cxx to LD2981. Updated Table 4 and Table 5. Updated Section 8: Package information and Section 8.4: SOT-89 packing information. Minor text changes in title, in features and description in cover page. 16-Mar-2015 16 Updated Section 8: Package information. Minor text changes. 01-Apr-2016 17 Updated Section 8: "Package information". Minor text changes. DocID6279 Rev 17 LD2981 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2016 STMicroelectronics – All rights reserved DocID6279 Rev 17 27/27