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| LD2979 SERIES VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT s s s s s s s s s s s VERY LOW DROPOUT VOLTAGE (0.2V TYP. AT 50mA LOAD) VERY LOW QUIESCENT CURRENT (TYP. 500A AT 50mA LOAD) OUTPUT CURRENT UP TO 50mA LOGIC-CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGES OF 2.85; 3.0; 3.2; 3.3; 3.8; 5.0V INTERNAL CURRENT AND THERMAL LIMIT SUPPLY VOLTAGE REJECTION: 63dB (TYP) ONLY 1F FOR STABILITY SELECTION AT 25C TEMPERATURE RANGE: -25C TO 125C PACKAGE AVAILABLE: SOT23-5L AND TO-92 SOT23-5L DESCRIPTION The LD2979 series are very Low Drop regulators available in SOT23-5L and TO-92. The very low drop-voltage and the very low quiescent current make them particularly suitable for low noise, low power applications and in battery powered systems. Shutdown Logic Control function is available on five pin version (TTL compatible). This means that TO-92 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. SCHEMATIC DIAGRAM February 2003 1/10 LD2979 SERIES ABSOLUTE MAXIMUM RATINGS Symbol VI VINH IO Ptot Tstg Top DC Input Voltage DC Inhibit Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value 16 VIN Internally limited Internally limited -40 to 150 -25 to 125 C C Unit V V Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. CONNECTION DIAGRAM (top view) SOT23-5L TO-92 PIN DESCRIPTION PIN NUMBER SYMBOL VIN GND INHIBIT NC VOUT Input Voltage Ground Control Switch ON/OFF (*) Not to be connected Output Voltage NAME AND FUNCTION SOT23-5L 1 2 3 4 5 TO-92 3 2 1 (*) Only for the version in SOT23-5L package: Inhibit pin is not internally pulled-up then it must not be left floating. Connect to a positive voltage higher than 2V to able the device. ORDERING CODES SOT23-5L (T&R) LD2979M28TR LD2979M30TR LD2979M32TR LD2979M33TR LD2979M38TR LD2979M50TR TO-92 LD2979Z28 LD2979Z30 LD2979Z32 LD2979Z33 LD2979Z38 LD2979Z50 TO-92 (T&R) LD2979Z28TR LD2979Z30TR LD2979Z32TR LD2979Z33TR LD2979Z38TR LD2979Z50TR TO-92 (Ammo Pack) LD2979Z28AP LD2979Z30AP LD2979Z32AP LD2979Z33AP LD2979Z38AP LD2979Z50AP OUTPUT VOLTAGES 2.85 V 3.0 V 3.2 V 3.3 V 3.8 V 5.0 V 2/10 LD2979 SERIES ELECTRICAL CHARACTERISTICS FOR LD2979 (refer to the test circuits, Ta = 25C, VIN=VO(NOM)+1V, IO=1mA, VINH=2V(*), CO = 1F) (unless otherwise specified) Symbol VO VO VO VO VO VO Iout VO Id Parameter Output Voltage Output Voltage Output Voltage Output Voltage Output Voltage Output Voltage Output Current Limit Line Regulation VIN = VO(NOM)+1V to 16V, IO = 1mA Ta= -25 to 125C 80 Ta= -25 to 125C 500 Ta= -25 to 125C 0 Ta= -25 to 125C COUT = 10F f = 120Hz 63 6 Ta= -25 to 125C 30 Ta= -25 to 125C 100 Ta= -25 to 125C 200 Ta= -25 to 125C Ta= -25 to 125C (*) Ta= -25 to 125C (*) Ta= -25 to 125C CO = 10F 2 0 5 160 -1 15 V 12 18 60 90 200 300 400 600 0.18 V V A 1 dB mV Test Conditions VIN = 3.85 V IO = 1 to 50mA VIN = 4 V IO = 1 to 50mA VIN = 4.2 V IO = 1 to 50mA VIN = 4.3 V IO = 1 to 50mA VIN = 4.8 V IO = 1 to 50mA VIN = 6 V IO = 1 to 50mA Ta= -25 to 125C Ta= -25 to 125C Ta= -25 to 125C Ta= -25 to 125C Ta= -25 to 125C Ta= -25 to 125C Min. 2.793 2.736 2.940 2.880 3.136 3.072 3.234 3.168 3.724 3.648 4.9 4.8 100 0.028 0.064 110 170 700 1300 A A 5 3.8 3.3 3.2 3 Typ. 2.85 Max. 2.907 2.964 3.060 3.120 3.264 3.328 3.366 3.432 3.876 3.952 5.1 5.2 mA %/VIN V V V V V Unit V Quiescent Current (On Mode) IO = 0 IO = 0 IO = 50mA IO = 50mA Quiescent Current (Off Mode) VINH < 0.18 V (*) VINH < 0.18 V SVR Vd Supply Voltage Rejection Dropout Voltage IO = 50mA IO = 0 IO = 0 IO = 1mA IO = 1mA IO = 10mA IO = 10mA IO = 50mA IO = 50mA VIL VIH II eN Inhibit Input Logic Low Inhibit Input Logic High Inhibit Input Current Device Off Device On VINH = 0 V (*) VINH = 5V Output Noise Voltage (RMS) BW= 300Hz to 50KHz (*) Note: Only for types in SOT23-5L 3/10 LD2979 SERIES TYPICAL CHARACTERISTICS (unless otherwise specified Ta = 25C) Figure 1 : Output Voltage vs Temperature Figure 4 : Dropout Voltage vs Output Current Figure 2 : Output Voltage vs Input Voltage Figure 5 : Dropout Voltage vs Temperature Figure 3 : Output Voltage vs Input Voltage Figure 6 : Quiescent Current vs Temperature 4/10 LD2979 SERIES Figure 7 : Short Circuit Current vs Dropout Voltage Figure 10 : Inhibit Voltage vs Temperature Figure 8 : Supply Voltage Rejection vs Frequency Figure 11 : Load Transient Response CO = 10F (ESR = 1 at 1KHz) Figure 9 : Inhibit Current vs Temperature Figure 12 : Load Transient Response CO = 10F (ESR = 1 at 1KHz) 5/10 LD2979 SERIES Figure 13 : Line Transient Response CO = 10F (ESR = 1 at 1KHz) 6/10 LD2979 SERIES SOT23-5L MECHANICAL DATA mm. DIM. MIN. A A1 A2 b C D E E1 e e1 L 0.35 0.90 0.00 0.90 0.35 0.09 2.80 2.60 1.50 0 .95 1.9 0.55 13.7 TYP MAX. 1.45 0.15 1.30 0.50 0.20 3.00 3.00 1.75 MIN. 35.4 0.0 35.4 13.7 3.5 110.2 102.3 59.0 37.4 74.8 21.6 TYP. MAX. 57.1 5.9 51.2 19.7 7.8 118.1 118.1 68.8 mils 7/10 LD2979 SERIES TO-92 MECHANICA DATA mm. DIM. MIN. A b D E e e1 L R S1 W 4.32 0.36 4.45 3.30 2.41 1.14 12.7 2.16 0.92 0.41 TYP MAX. 4.95 0.51 4.95 3.94 2.67 1.40 15.49 2.41 1.52 0.56 MIN. 170.1 14.2 175.2 129.9 94.9 44.9 500.0 85.0 36.2 16.1 TYP. MAX. 194.9 20.1 194.9 155.1 105.1 55.1 609.8 94.9 59.8 22.0 mils 0102782/C 8/10 LD2979 SERIES Tape & Reel SOT23-xL MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 3.13 3.07 1.27 3.9 3.9 3.23 3.17 1.37 4.0 4.0 12.8 20.2 60 14.4 3.33 3.27 1.47 4.1 4.1 0.123 0.120 0.050 0.153 0.153 0.127 0.124 0.054 0.157 0.157 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.131 0.128 0.0.58 0.161 0.161 0.512 MIN. TYP. MAX. 7.086 0.519 inch 9/10 LD2979 SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com 10/10 |
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