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LP2982

www.ti.com

SNVS128J –MARCH 2000–REVISED APRIL 2013

LP2982 Micropower 50 mA Ultra Low-Dropout Regulator in SOT-23 Package

Check for Samples: LP2982

FEATURES

DESCRIPTION

The LP2982 is a 50 mA, fixed-output voltage

• Ultra Low Dropout Voltage

regulator designed to provide ultra low dropout and

• Ensured 50 mA Output Current

lower noise in battery powered applications.

• Typical Dropout Voltage 180 mV @ 80 mA

Using an optimized VIP™ (Vertically Integrated PNP)

• Requires Minimum External Components

process, the LP2982 delivers unequaled performance

• < 1 μA Quiescent Current when Shutdown

in all specifications critical to battery-powered

designs:

• Low Ground Pin Current at All Loads

Dropout Voltage: Typically 120 mV @ 50 mA load,

• Output Voltage Accuracy 1.0% (A Grade)

and 7 mV @ 1 mA load.

• High Peak Current Capability (150 mA Typical)

Ground Pin Current: Typically 375 μA @ 50 mA

• Wide Supply Voltage Range (16V Max)

load, and 80 μA @ 1 mA load.

• Low Z

OUT

0.3Ω Typical (10 Hz to 1 MHz)

Sleep Mode: Less than 1 μA quiescent current when

• Over-Temperature/Over-Current Protection

on/off pin is pulled low.

• −40°C to +125°C Junction Temperature Range

Precision Output: 1.0% tolerance output voltages

available (A grade).

APPLICATIONS

Low Noise: By adding an external bypass capacitor,

• Cellular Phone

output noise can be reduced to 30 μV (typical).

• Palmtop/Laptop Computer

Four output voltage versions, from 3.0V to 5.0V, are

• Personal Digital Assistant (PDA)

available as standard products.

• Camcorder, Personal Stereo, Camera

Block Diagram

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.

2VIP is a trademark of Texas Instruments.

3All other trademarks are the property of their respective owners.

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.

Summary of content (21 pages)

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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 LP2982 Micropower 50 mA Ultra Low-Dropout Regulator in SOT-23 Package Check for Samples: LP2982 FEATURES DESCRIPTION • • • • • • • • • • • • The LP2982 is a 50 mA, fixed-output voltage regulator designed to provide ultra low dropout and lower noise in battery powered applications.
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com Connection Diagram Top View Figure 1. 5-Lead Small Outline SOT-23 Package See Package Number DBV0005A Pin Descriptions Name Pin Number VIN 1 Input Voltage Function GND 2 Common Ground (device substrate) ON/OFF 3 Logic high enable input BYPASS 4 Bypass capacitor for low noise operation VOUT 5 Regulated output voltage These devices have limited built-in ESD protection.
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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 Electrical Characteristics Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 μF, COUT = 4.7 μF, VON/OFF = 2V.
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com Typical Application Circuit *ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used. **Minimum capacitance is shown to insure stability over full load current range. More capacitance provides superior dynamic performance (see Application Hints). ***See Application Hints.
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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 Typical Performance Characteristics Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, COUT = 4.7 μF, CIN = 1 μF, all voltage options, ON/OFF pin tied to VIN. Output Voltage vs Temperature Output Voltage vs Temperature Figure 2. Figure 3. Output Voltage vs Temparature Dropout Characteristics Figure 4. Figure 5. Dropout Characteristics Dropout Characteristics Figure 6. Figure 7.
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, COUT = 4.7 μF, CIN = 1 μF, all voltage options, ON/OFF pin tied to VIN. Dropout Voltage vs Temperature Dropout Voltage vs Load Current Figure 8. Figure 9. Ground Pin Current vs Temperature Ground Pin Current vs Load Current Figure 10. Figure 11. Input Current vs VIN Input Current vs VIN Figure 12. 6 Figure 13.
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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, COUT = 4.7 μF, CIN = 1 μF, all voltage options, ON/OFF pin tied to VIN. Line Transient Response Line Transient Response Figure 14. Figure 15. Load Transient Response Load Transient Response Figure 16. Figure 17. Load Transient Response Load Transient Response Figure 18. Figure 19.
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, COUT = 4.7 μF, CIN = 1 μF, all voltage options, ON/OFF pin tied to VIN. 8 Short Circuit Current Instantaneous Short Circuit Current vs Temperature Figure 20. Figure 21. Short Circuit Current Instantaneous Short Circuit Current vs Output Voltage Figure 22. Figure 23.
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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, COUT = 4.7 μF, CIN = 1 μF, all voltage options, ON/OFF pin tied to VIN. ON/OFF Pin Current vsVON/OFF ON/OFF Threshold vs Temperature Figure 26. Figure 27. Input to Output Leakage vs Temperature Output Reverse Leakage vs Temperature Figure 28. Figure 29. Output Noise Density Output Noise Density Figure 30. Figure 31.
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, COUT = 4.7 μF, CIN = 1 μF, all voltage options, ON/OFF pin tied to VIN. Output Noise Density Ripple Rejection Figure 32. Figure 33. Turn-ON Waveform Turn-ON Waveform Figure 34. Figure 35. Turn-ON Waveform Figure 36.
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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the external capacitors used with the LP2982 must be carefully selected to assure regulator loop stability. Input Capacitor: An input capacitor whose value is ≥ 1 μF is required with the LP2982 (amount of capacitance can be increased without limit). This capacitor must be located a distance of not more than 0.
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com Figure 37. 5V/2.2 μF ESR Curves Figure 38. 3V/4.7 μF ESR Curves BYPASS CAPACITOR The 0.01 μF capacitor connected to the bypass pin to reduce noise must have very low leakage. The current flowing out of the bypass pin comes from the bandgap reference, which is used to set the output voltage. This capacitor leakage current causes the output voltage to decline by an amount proportional to the current. Typical values are −0.015%/nA @ −40°C, −0.
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LP2982 www.ti.com SNVS128J – MARCH 2000 – REVISED APRIL 2013 SCHOTTKY DIODE LP2982 VIN VOUT PNP GND Figure 40. Adding External Schottky Diode Protection ON/OFF INPUT OPERATION The LP2982 is shut off by pulling the ON/OFF input low, and turned on by driving the input high. If this feature is not to be used, the ON/OFF input should be tied to VIN to keep the regulator on at all times (the ON/OFF input must not be left floating).
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LP2982 SNVS128J – MARCH 2000 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision I (April 2013) to Revision J • 14 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) LP2982AIM5-3.0/NOPB Package Type Package Pins Package Drawing Qty ACTIVE SOT-23 DBV 5 1000 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 L20A (4/5) LP2982AIM5-3.3 NRND SOT-23 DBV 5 1000 TBD Call TI Call TI -40 to 125 L19A LP2982AIM5-3.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (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.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) LP2982AIM5-3.0/NOPB SOT-23 DBV 5 1000 178.0 8.4 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.2 3.2 1.4 4.0 8.0 Q3 LP2982AIM5-3.3 SOT-23 DBV 5 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LP2982AIM5-3.3/NOPB SOT-23 DBV 5 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP2982AIM5-3.0/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2982AIM5-3.3 SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2982AIM5-3.3/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2982AIM5-5.0 SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2982AIM5-5.0/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2982AIM5X-3.
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