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LP2980-ADJ

www.ti.com

SNVS001E –APRIL 2000–REVISED APRIL 2013

LP2980-ADJ Micropower 50 mA Ultra Low-Dropout

Adjustable Voltage Regulator in SOT-23

Check for Samples: LP2980-ADJ

FEATURES

DESCRIPTION

The LP2980-ADJ is a 50 mA adjustable voltage

• Ultra Low Dropout Voltage

regulator designed to provide ultra low dropout in

• Output Adjusts from 1.23V to 15V

battery powered applications.

• Specified 50 mA Output Current

Using an optimized VIP (vertically Integrated PNP)

• Uses Tiny SOT-23 Package

process, the LP2980-ADJ delivers unequaled

• Requires Few External Components

performance in all specifications critical to battery-

powered designs:

• <1 μA Quiescent Current when Shutdown

Adjustable Output: output voltage can be set from

• Low Ground Pin Current at All Loads

1.23V to 15V.

• High Peak Current Capability (150 mA Typical)

Precision Reference: 1.0% tolerance.

• Wide Supply Voltage Range (2.5V–16V)

• Overtemperature/overcurrent Protection

Dropout Voltage: typically 120 mV @ 50 mA load,

and 7 mV @ 1 mA load.

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

Ground Pin Current: typically 320 µA @ 50 mA

APPLICATIONS

load, and 80 µA @ 1 mA load.

• Cellular Phone

Sleep Mode: less than 1 μA quiescent current when

on/off pin is pulled low.

• Palmtop/Laptop Computer

• Camcorder, Personal Stereo, Camera

Smallest Possible Size: Package uses minimum

board space.

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.

2All 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 (18 pages)

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LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 LP2980-ADJ Micropower 50 mA Ultra Low-Dropout Adjustable Voltage Regulator in SOT-23 Check for Samples: LP2980-ADJ FEATURES DESCRIPTION • • • • • • • • • • • The LP2980-ADJ is a 50 mA adjustable voltage regulator designed to provide ultra low dropout in battery powered applications. 1 2 Ultra Low Dropout Voltage Output Adjusts from 1.
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LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com Connection Diagram Figure 1.
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LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ABSOLUTE MAXIMUM RATINGS (1) (2) Storage Temperature Range −65 to +150°C Operating Junction Temperature Range −40 to +125°C Lead Temp. (Soldering, 5 seconds) ESD Rating 260°C (3) Power Dissipation 2 kV (4) Internally Limited −0.
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LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) 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 = 4.3V, VOUT = 3.3V, IL = 1 mA, CIN = 1 μF, COUT = 2.2 μF, VON/OFF = 2V.
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LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit. Output Voltage vs. Temperature Dropout Characteristics Figure 2. Figure 3. Dropout Voltage vs. Temperature Dropout Voltage vs. Load Current Figure 4. Figure 5. Ground Pin Current vs. Temperature Ground Pin Current vs.
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LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit. 6 Input Current vs. VIN Load Transient Response Figure 8. Figure 9. Line Transient Response Short Circuit Current Figure 10. Figure 11. Short Circuit Current Load Regulation Figure 12. Figure 13.
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LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit. ADJ Pin Bias Current vs. Load Current ADJ Pin Bias Current vs. Temperature Figure 14. Figure 15. ON/OFF Threshold vs.Temperature Output Noise Density Figure 16. Figure 17. Ripple Rejection Figure 18.
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LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the external capacitors must be selected carefully to assure regulator loop stability. INPUT CAPACITOR: An input capacitor whose value is ≥1 μF is required (the amount of capacitance may be increased without limit). Any good quality Tantalum or Ceramic capacitor may be used here. The capacitor must be located not more than 0.
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LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 Be warned that the ESR of a ceramic capacitor is typically low enough to make an LDO oscillate: a 2.2 μF ceramic demonstrated an ESR of about 15 mΩ when tested. If used as an output capacitor, this will cause instability (see ESR Curves). If a ceramic is used on the output of an LDO, a small resistance (about 1Ω) should be placed in series with the capacitor.
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LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com ON/OFF INPUT OPERATION The LP2980-ADJ is shut off by driving the ON/OFF input low, and turned on by pulling the ON/OFF input high. If this feature is not to be used, the ON/OFF input must be tied to VIN to keep the regulator output on at all times (the ON/OFF input must not be left floating).
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LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision D (April 2013) to Revision E • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-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) B0 (mm) K0 (mm) P1 (mm) LP2980IM5-ADJ SOT-23 DBV 5 1000 178.0 8.4 LP2980IM5-ADJ/NOPB SOT-23 DBV 5 1000 178.0 LP2980IM5X-ADJ SOT-23 DBV 5 3000 178.0 LP2980IM5X-ADJ/NOPB SOT-23 DBV 5 3000 178.0 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP2980IM5-ADJ SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2980IM5-ADJ/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2980IM5X-ADJ SOT-23 DBV 5 3000 210.0 185.0 35.0 LP2980IM5X-ADJ/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.
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