LD2982

LD2982 SERIES VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE s s s s s s s s s s s s VERY LOW DROPOUT VOLTAGE (120mV AT 50mA AND 7mV AT 1mA LOAD) VERY LOW QUIESCENT CURRENT (375µA TYP. AT 50mA LOAD AND 75µA AT 1mA) OUTPUT CURRENT UP TO 50mA LOGIC CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGE OF 1.5,1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V INTERNAL CURRENT AND THERMAL LIMIT AVAILABLE IN ± 1% TOLLERANCE (AT 25°C, A VERSION) SUPPLY VOLTAGE REJECTION: 45dB (TYP) ONLY 1µF FOR STABILITY LOW OUTPUT NOISE VOLTAGE 30µVrms SMALLEST PACKAGE SOT23-5L TEMPERATURE RANGE: -40°C TO 125°C SOT23-5L DESCRIPTION The LD2982 is a 50mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. In sleep mode quiescent current is less than 1µA when INHIBIT pin is pulled low. Shutdown Logic Control Function is available on pin 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. An external capacitor CBYP=10nF connected between bypass pin and GND reduce the noise to 30µVrms. Typical application are in cellular phone, palmtop/ laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera. SCHEMATIC DIAGRAM July 2003 1/13 LD2982 SERIES ABSOLUTE MAXIMUM RATINGS Symbol VI VINH IO Ptot Tstg Top DC Input Voltage INHIBIT Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value 16 16 Internally limited Internally limited -65 to +150 -40 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. THERMAL DATA Symbol Rthj-case Parameter Thermal Resistance Junction-case SOT23-5L 81 Unit °C/W CONNECTION DIAGRAM (top view) PIN DESCRIPTION Pin N° Symbol 1 2 3 Name and Function 4 SOT23-5L 5 IN Input Port GND Ground Pin INHIBIT Control switch ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. Disable the device when connected to GND or to a positive voltage less than 0.18V Bypass Bypass Pin: Capacitor to be connected to GND in order to improve the thermal noise performances. OUT Output Port ORDERING CODES A VERSION LD2982AM15R LD2982AM18R LD2982AM25R LD2982AM28R LD2982AM285R LD2982AM30R LD2982AM31R LD2982AM32R LD2982AM33R LD2982AM35R LD2982AM36R LD2982AM38R LD2982AM40R LD2982AM47R LD2982AM50R B VERSION LD2982BM15R LD2982BM18R LD2982BM25R LD2982BM28R LD2982BM285R LD2982BM30R LD2982BM31R LD2982BM32R LD2982BM33R LD2982BM35R LD2982BM36R LD2982BM38R LD2982BM40R LD2982BM47R LD2982BM50R OUTPUT VOLTAGES 1.5V 1.8V 2.5V 2.8V 2.85V 3.0V 3.1V 3.2V 3.3V 3.5V 3.6V 3.8V 4.0V 4.7V 5.0V 2/13 LD2982 SERIES ELECTRICAL CHARACTERISTICS FOR LD2982A (TJ = 25°C, VI=VO+1V, IO=1mA, VSHDN=2V, CI = 1µF, CO = 1µF, unless otherwise specified) Symbol VOp VO Parameter Operating Input Voltage Output Voltage VI = 2.5V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 2.8V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 3.5V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 3.8V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 3.85V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.0V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.1V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.2V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.3V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.5V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.6V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 4.8V IO = 1 to 50mA IO = 1 to 50mA VO Output Voltage VI = 5.0V IO = 1 to 50mA IO = 1 to 50mA TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C Test Conditions Min. 2.5 1.485 1.477 1.470 1.782 1.773 1.764 2.475 2.462 2.45 2.772 2.758 2.744 2.821 2.807 2.793 2.970 2.955 2.94 3.069 3.053 3.038 3.168 3.152 3.136 3.267 3.250 3.234 3.465 3.447 3.43 3.564 3.546 3.528 3.762 3.743 3.724 3.96 3.94 3.92 4 3.8 3.6 3.5 3.3 3.2 3.1 3.0 2.85 2.8 2.5 1.8 1.5 Typ. Max. 16 1.515 1.523 1.530 1.818 1.827 1.836 2.525 2.537 2.55 2.828 2.842 2.856 2.879 2.893 2.907 3.030 3.045 3.06 3.131 3.146 3.162 3.232 3.248 3.264 3.333 3.349 3.366 3.535 3.552 3.57 3.636 3.654 3.672 3.838 3.857 3.876 4.04 4.06 4.08 Unit V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V 3/13 LD2982 SERIES Symbol VO Parameter Output Voltage VI = 5.7V Test Conditions IO = 1 to 50mA IO = 1 to 50mA TJ= -40 to 125°C Min. 4.653 4.629 4.606 4.95 4.925 Typ. 4.7 Max. 4.747 4.77 4.794 Unit V V V V V V mA %/VI %/VI mV mV mV mV mV mV mV mV µA µA µA µA µA µA µA µA µA µA dB VO Output Voltage VI = 6.0V IO = 1 to 50mA IO = 1 to 50mA TJ= -40 to 125°C 5 5.05 5.075 5.1 4.9 150 0.003 ISC Short Circuit Current RL = 0 VI = VO+1V to 16V, IO = 1mA VI = VO+1V to 16V, IO = 1mA TJ= -40 to 125°C ∆VO/∆VI Line Regulation 0.014 0.032 Vd Dropout Voltage IO = 0 IO = 0 IO = 1mA IO = 1mA IO = 10mA IO = 10mA IO = 50mA IO = 50mA TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C TJ= -40 to 125°C 1 7 40 120 80 TJ= -40 to 125°C 100 TJ= -40 to 125°C 200 TJ= -40 to 125°C 600 TJ= -40 to 125°C 0 3 5 10 15 60 90 150 225 100 150 150 200 300 400 900 1200 1 Id Quiescent Current IO = 0 IO = 0 IO = 1mA IO = 1mA IO = 10mA IO = 10mA IO = 50mA IO = 50mA OFF MODE VINH