LD2981 STMICROELECTRONICS [STMicroelectronics], LD2981 Datasheet
LD2981
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LD2981 Summary of contents
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... Logic Control function is available on pin n.3 (TTL compatible). This means that when the device is used as local regulator 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, ...
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... LD2981 SERIES 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 Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied ...
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... 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 0.18V. SOT-89 SOT23-5L LD2981CM15TR LD2981CM18TR LD2981CM25TR LD2981CM28TR LD2981CM30TR LD2981CM32TR LD2981CM33TR LD2981CM36TR LD2981CM38TR LD2981CM40TR LD2981CM47TR LD2981CM48TR LD2981CM50TR LD2981 SERIES C VERSION SOT-89 LD2981CU15TR LD2981CU18TR LD2981CU25TR LD2981CU28TR LD2981CU30TR LD2981CU32TR LD2981CU33TR LD2981CU36TR LD2981CU38TR LD2981CU40TR LD2981CU47TR LD2981CU48TR LD2981CU50TR OUTPUT VOLTAGES 1 ...
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... LD2981 SERIES ELECTRICAL CHARACTERISTICS FOR LD2981AB ( 2.2 F(X7R 1mA 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 O V Output Voltage O V Output Voltage O V Output Voltage O V Output Voltage ...
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... HIGH = Output -40 to 125 J ° -40 to 125 INH J ° -40 to 125 INH 300 KHz LD2981 SERIES Min. Typ. Max. 80 100 °C 150 100 150 °C 200 250 400 °C 800 1000 1300 °C 2600 0.8 2 ° ° ...
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... LD2981 SERIES ELECTRICAL CHARACTERISTICS FOR LD2981C ( 2.2 F(X7R 1mA 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 O V Output Voltage O V Output Voltage O V Output Voltage O V Output Voltage ...
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... J ° -40 to 125 INH J ° -40 to 125 INH 300 KHz LD2981 SERIES Min. Typ. Max. 0.003 0.014 0.032 80 100 °C 150 100 150 °C 200 250 400 °C 800 1000 1300 2600 °C 0.8 ° ...
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... LD2981 SERIES TYPICAL PERFORMANCE CHARACTERISTICS ( 2.2 F(X7R 2V, unless otherwise specified) O INH Figure 1 : Output Voltage vs Temperature Figure 2 : Output Voltage vs Temperature Figure 3 : Line Regulation vs Temperature 8/17 = 25° +1V O(NOM) I Figure 4 : Load Regulation vs Temperature Figure 5 : Dropout Voltage vs Temperature Figure 6 : Quiescent Current vs Temperature ...
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... Figure 7 : Quiescent Current vs Output Current Figure 8 : OFF MODE Quiescent Current vs Temperature Figure 9 : Quiescent Current vs Input Voltage Figure 10 : Dropout Voltage vs Output Current Figure 11 : Inhibit Input Current vs Temperature Figure 12 : Inhibit Voltage vs Temperature LD2981 SERIES 9/17 ...
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... LD2981 SERIES Figure 13 : Supply Voltage Rejection vs Frequency Figure 14 : Noise Voltage vs Frequency Figure 15 : Best Case: Highest Output Version 10/17 Figure 16 : Worst Case: Lowest Output Version Figure 17 : Load Transient Response V = 4.7V 100mA 4.7 F X7R Figure 18 : Line Transient Response 1V 4.7V 100mA O(NOM) ...
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... 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 ...
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... LD2981 SERIES Figure 19 : Reverse Current Test Circuit 12/17 ...
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... SOT23-5L MECHANICAL DATA DIM. MIN. A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2. 2.60 L 0.10 mm. TYP MAX. MIN. 1.45 0.10 1.30 0.50 0.20 3.00 110.2 1.75 0.95 3.00 102.3 0.60 . LD2981 SERIES mils TYP. MAX. 35.4 57.1 0.0 35.4 51.2 13.7 19.7 3.5 118.1 59.0 68.8 37.4 118.1 3.9 23.6 7049676C 3.9 7.8 13/17 ...
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... LD2981 SERIES DIM. MIN. 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 14/17 SOT-89 MECHANICAL DATA mm. TYP MAX. 1.6 0.56 0.48 0.44 0.44 4.6 1.83 2.6 1.57 3.07 4.25 1.2 mils MIN. TYP. MAX. 55.1 17.3 14.2 13.8 13.8 173.2 181.1 63.8 90.2 102.4 55.9 115.0 120.9 155.1 167.3 35.0 P025H 63.0 22.0 18.9 17.3 17.3 72.0 61.8 47.2 ...
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... Tape & Reel SOT23-xL MECHANICAL DATA DIM. MIN 12 3.13 Bo 3.07 Ko 1.27 Po 3.9 P 3.9 mm. TYP MAX. MIN. 180 13.0 13.2 0.504 0.795 2.362 14.4 3.23 3.33 0.123 3.17 3.27 0.120 1.37 1.47 0.050 4.0 4.1 0.153 4.0 4.1 0.153 LD2981 SERIES inch TYP. MAX. 7.086 0.512 0.519 0.567 0.127 0.131 0.124 0.128 0.054 0.0.58 0.157 0.161 0.157 0.161 15/17 ...
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... LD2981 SERIES Tape & Reel SOT89 MECHANICAL DATA DIM. MIN 12 4.70 Bo 4.30 Ko 1.70 Po 3.9 P 7.9 16/17 mm. TYP MAX. MIN. 180 13.0 13.2 0.504 0.795 2.362 14.4 4.80 4.90 0.185 4.40 4.50 0.169 1.80 1.90 0.067 4.0 4.1 0.153 8.0 8.1 0.311 inch TYP. MAX. 7.086 0.512 0.519 0.567 0.189 0.193 0.173 0.177 0.071 0.075 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. © 2003 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES http://www.st.com LD2981 SERIES 17/17 ...