LD2980ABU30TR

Manufacturer Part NumberLD2980ABU30TR
DescriptionUltra low drop voltage regulators compatible with low ESR inhibit output capacitors
ManufacturerSTMICROELECTRONICS [STMicroelectronics]
LD2980ABU30TR datasheet
 
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Features
Stable with low ESR ceramic capacitors
Ultra low dropout voltage (0.12 V typ. at 50 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 50 mA
Logic-controlled electronic shutdown
Output voltage of 1.8; 3.0; 3.3; 3.6; 5.0 V
Internal current and thermal limit
± 0.5% Tolerance output voltage available (A
version)
Output low noise voltage 160 µVRMS
Temperature range: -40 to 125 °C
Smallest package SOT23-5L and SOT-89
Fast dynamic response to line and load
changes
Description
The low drop-voltage and the ultra low quiescent
current make them suitable for low noise, low
power applications and in battery
poweredsystems. The quiescent current in sleep
mode is less than 1 µA when the INHIBIT pin is
pulled low. A shutdown logic control function is
Table 1.
Device summary
AB Version
LD2980ABXX30
LD2980ABXX33
LD2980ABXX36
LD2980ABXX50
July 2008
Ultra low drop voltage regulators compatible
with low ESR inhibit output capacitors
SOT23-5L
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 LD2980 is designed to work with low ESR
ceramic capacitors. Typical applications are
cellular phone, laptop computer, personal digital
assistant (PDA), personal stereo, camcorder and
camera.
Part numbers
C Version
LD2980CXX18
LD2980CXX33
LD2980CXX36
LD2980CXX50
Rev 17
LD2980ABxx
LD2980Cxx
SOT-89
Output voltage
1.8 V
3.0 V
3.3 V
3.6 V
5.0 V
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www.st.com
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LD2980ABU30TR Summary of contents

  • Page 1

    Features ■ Stable with low ESR ceramic capacitors ■ Ultra low dropout voltage (0.12 V typ load typ load) ■ Very low quiescent current (80 µA typ load in on ...

  • Page 2

    Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    Diagram Figure 1. Schematic diagram 3/23 ...

  • Page 4

    Pin configuration Figure 2. Pin connections (top view) SOT23-5L Table 2. Pin description Pin n° Pin n° Symbol SOT23-5L SOT- INHIBIT Table 3. Thermal data Symbol Parameter R Thermal resistance ...

  • Page 5

    Maximum ratings Table 4. Absolute maximum ratings Symbol V DC input voltage I V INHIBIT input voltage INH I Output current O P Power dissipation D T Storage temperature range STG T Operating junction temperature range OP Note: Absolute ...

  • Page 6

    Typical application Figure 3. Application circuit Note: Inhibit pin is not internally pulled-up then it must not be left floating. Disable the device when connected to GND positive voltage less than 0.18 V. 6/23 ...

  • Page 7

    Electrical characteristics Table 5. Electrical characteristics for LD2980AB ( 2.2 µF (X7R Symbol Parameter V Operating input voltage OP V Output voltage O V Output voltage O V Output voltage O V Output voltage O ...

  • Page 8

    Table 5. Electrical characteristics for LD2980AB (continued µF(X7R 2.2 µF (X7R Symbol Parameter Quiescent current ON MODE I Q OFF MODE (1) V Dropout voltage DROP I Short circuit current SC SVR Supply voltage ...

  • Page 9

    Table 6. Electrical characteristics for LD2980C ( 2.2 µF (X7R Symbol Parameter V Operating input voltage OP V Output voltage O V Output voltage O V Output voltage O V Output voltage O V Output voltage ...

  • Page 10

    Table 6. Electrical characteristics for LD2980C (continued) (T µF (X7R 2.2 µF (X7R Symbol Parameter V Output voltage O ΔV Line regulation O Quiescent current ON MODE I Q OFF MODE (1) V Dropout voltage DROP ...

  • Page 11

    Typical performance characteristics ( ° otherwise specified) Figure 4. Output voltage vs temperature Figure 6. Line regulation vs temperature Figure 8. Dropout voltage vs temperature + µF (X7R), ...

  • Page 12

    Figure 10. Quiescent current vs output current Figure 12. Quiescent current vs input voltage Figure 13. Dropout voltage vs output current Figure 14. Inhibit input current vs temperature Figure 15. Inhibit voltage vs temperature 12/23 Figure 11. Off mode quiescent ...

  • Page 13

    Figure 16. Supply voltage rejection vs frequency Figure 18. Best case: highest output version Figure 20. Load transient response V = 4.7V 100mA 4.7µF (X7R Figure 17. Noise voltage vs frequency ...

  • Page 14

    Application notes 7.1 External capacitors Like any low-dropout regulator, the LD2980 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 ...

  • Page 15

    Reverse current The power transistor used in the LD2980 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 ...

  • Page 16

    Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...

  • Page 17

    SOT-89 mechanical data mm. Dim. Min. Typ. A 1.4 B 0.44 B1 0.36 C 0.35 C1 0.35 D 4.4 D1 1.62 E 2.29 e 1.42 e1 2.92 H 3.94 L 0.89 mils. Max. Min. Typ. 1.6 55.1 0.56 17.3 0.48 ...

  • Page 18

    Dim. Min. A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2. 2.60 L 0.10 18/23 SOT23-5L mechanical data mm. Typ. Max. 1.45 0.10 1.30 0.50 0.20 3.00 1.75 0.95 3.00 0.60 mils. Min. ...

  • Page 19

    Tape & reel SOT23-xL mechanical data mm. Dim. Min. Typ 12.8 13 3.13 3.23 Bo 3.07 3.17 Ko 1.27 1.37 Po 3.9 4.0 P 3.9 4.0 inch. Max. Min. Typ. 180 13.2 ...

  • Page 20

    Tape & reel SOT89 mechanical data Dim. Min 12 4.70 Bo 4.30 Ko 1.70 Po 3.9 P 7.9 20/23 mm. Typ. Max. Min. 180 13.0 13.2 0.504 0.795 2.362 14.4 4.80 4.90 ...

  • Page 21

    ... Order codes Table 7. Order codes AB Version SOT23-5L SOT-89 LD2980ABM30TR LD2980ABU30TR LD2980ABM33TR LD2980ABU33TR LD2980ABM36TR LD2980ABU36TR LD2980ABM50TR 1. Available on request. C Version SOT23-5L SOT-89 LD2980CM18TR LD2980CU18TR (1) (1) LD2980CM30TR LD2980CU30TR LD2980CM33TR (1) LD2980CM36TR LD2980CU36TR LD2980CM50TR Output voltage 1.8 V (1) 3.0 V 3.3 V (1) 3.6 V 5.0 V 21/23 ...

  • Page 22

    Revision history Table 8. Document revision history Date Revision 03-Jul-2006 13 13-Nov-2006 14 06-Sep-2007 15 14-Feb-2008 16 11-Jul-2008 17 22/23 Changes Order codes updated and new template. Add part number LD2980ABU18TR. Add Table 1 on page 1. Modified: Table ...

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    Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any ...