LD2979 SERIES VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ VERY LOW DROPOUT VOLTAGE (0.2V TYP. AT 50mA LOAD) VERY LOW QUIESCENT CURRENT (TYP. 500µA 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 1µF FOR STABILITY SELECTION AT 25°C TEMPERATURE RANGE: -25°C TO 125°C PACKAGE AVAILABLE: SOT23-5L AND TO-92 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 SOT23-5L 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 Parameter Value Unit DC Input Voltage 16 V DC Inhibit Input Voltage VIN V Output Current Internally limited Ptot Power Dissipation Internally limited Tstg Storage Temperature Range -40 to 150 °C Top Operating Junction Temperature Range -25 to 125 °C IO 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 NAME AND FUNCTION SOT23-5L TO-92 Input Voltage 1 3 Ground Control Switch ON/OFF (*) Not to be connected Output Voltage 2 3 4 5 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) TO-92 TO-92 (T&R) TO-92 (Ammo Pack) OUTPUT VOLTAGES LD2979M28TR LD2979M30TR LD2979M32TR LD2979M33TR LD2979M38TR LD2979M50TR LD2979Z28 LD2979Z30 LD2979Z32 LD2979Z33 LD2979Z38 LD2979Z50 LD2979Z28TR LD2979Z30TR LD2979Z32TR LD2979Z33TR LD2979Z38TR LD2979Z50TR LD2979Z28AP LD2979Z30AP LD2979Z32AP LD2979Z33AP LD2979Z38AP LD2979Z50AP 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 = 25°C, VIN=VO(NOM)+1V, IO=1mA, VINH=2V(*), CO = 1µF) (unless otherwise specified) Symbol VO Parameter Output Voltage VO Output Voltage VO Output Voltage Test Conditions Min. Typ. VIN = 3.85 V 2.793 2.85 IO = 1 to 50mA 2.736 2.940 IO = 1 to 50mA Output Voltage Ta= -25 to 125°C 3.072 Ta= -25 to 125°C 3.168 VIN = 4.8 V 3.724 IO = 1 to 50mA Ta= -25 to 125°C 3.648 VIN = 4.3 V 3.234 Output Voltage VO Output Voltage Iout Output Current Limit ∆VO Line Regulation VIN = 6 V 4.9 IO = 1 to 50mA Id Ta= -25 to 125°C IO = 50mA Quiescent Current (Off Mode) VINH < 0.18 V (*) VINH < 0.18 V Vd Dropout Voltage IO = 50mA 3.264 3.3 IO = 1mA IO = 10mA V 3.366 V 3.432 3.8 3.876 V 3.952 5 5.1 V 5.2 mA 80 %/VIN 110 µA 170 Ta= -25 to 125°C 500 700 1300 Ta= -25 to 125°C µA 0 Ta= -25 to 125°C COUT = 10µF V 3.328 0.028 1 f = 120Hz 63 6 Ta= -25 to 125°C dB 12 mV 18 30 60 100 200 Ta= -25 to 125°C 90 IO = 10mA Ta= -25 to 125°C 300 IO = 50mA 200 400 IO = 50mA Ta= -25 to 125°C 600 0.18 V 0 -1 µA 5 15 VIL Inhibit Input Logic Low Device Off Ta= -25 to 125°C (*) VIH Inhibit Input Logic High Device On Ta= -25 to 125°C (*) Inhibit Input Current VINH = 0 V (*) VINH = 5V Output Noise Voltage (RMS) 3.060 0.064 IO = 1mA eN V 3.120 3.2 4.8 IO = 0 IO = 0 II 3 VIN = VO(NOM)+1V to 16V, IO = 1mA Ta= -25 to 125°C Quiescent Current (On Mode) IO = 0 IO = 0 Supply Voltage Rejection 2.907 100 IO = 50mA SVR Unit 2.964 2.880 3.136 IO = 1 to 50mA VO Ta= -25 to 125°C VIN = 4.2 V IO = 1 to 50mA VO Ta= -25 to 125°C VIN = 4 V Max. Ta= -25 to 125°C BW= 300Hz to 50KHz CO = 10µF 2 V 160 µV (*) Note: Only for types in SOT23-5L 3/10 LD2979 SERIES TYPICAL CHARACTERISTICS (unless otherwise specified Ta = 25°C) 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 = 10µF (ESR = 1 at 1KHz) Figure 9 : Inhibit Current vs Temperature Figure 12 : Load Transient Response CO = 10µF (ESR = 1 at 1KHz) 5/10 LD2979 SERIES Figure 13 : Line Transient Response CO = 10µF (ESR = 1 at 1KHz) 6/10 LD2979 SERIES SOT23-5L MECHANICAL DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 0.90 1.45 35.4 57.1 A1 0.00 0.15 0.0 5.9 A2 0.90 1.30 35.4 51.2 b 0.35 0.50 13.7 19.7 C 0.09 0.20 3.5 7.8 D 2.80 3.00 110.2 118.1 E 2.60 3.00 102.3 118.1 E1 1.50 1.75 59.0 68.8 e 0 .95 37.4 e1 1.9 74.8 L 0.35 0.55 13.7 21.6 7/10 LD2979 SERIES TO-92 MECHANICA DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 D 4.45 4.95 175.2 194.9 E 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 L 12.7 15.49 500.0 609.8 R 2.16 2.41 85.0 94.9 S1 0.92 1.52 36.2 59.8 W 0.41 0.56 16.1 22.0 0102782/C 8/10 LD2979 SERIES Tape & Reel SOT23-xL MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 3.13 3.23 3.33 0.123 0.127 0.131 Bo 3.07 3.17 3.27 0.120 0.124 0.128 Ko 1.27 1.37 1.47 0.050 0.054 0.0.58 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 3.9 4.0 4.1 0.153 0.157 0.161 9/10 LD2979 SERIES Information furnished is believed to be accurate and reliable. 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