L4987CPT30

® L4987 SERIES VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT AND DROPOUT CONTROL FLAG s s s s s s s s s s VERY LOW DROPOUT VOLTAGE (0.25V TYP.) DROPOUT CONTROL FLAG VERY LOW QUIESCENT CURRENT (TYP. 90 µA IN OFF MODE, 500µA IN ON MODE) OUTPUT CURRENT UP TO 200 mA LOGIC-CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGES OF 3V, 5V 8.7V 12V INTERNAL CURRENT AND THERMAL LIMIT ONLY 2.2µF FOR STABILITY AVAILABLEIN ± 2% SELECTION AT 25 oC SUPPLY VOLTAGE REJECTION: 70 dB (TYP.) PPAK DESCRIPTION The L4987 is a very low drop regulator available in PPAK. The very low drop-voltage (0.5V Max at 200 mA) and the very low quiescent current make it particularly suitable for low noise, low power applications, and in battey powered systems. The input dump protection up to 40V makes it ideal for automotive applications. a shutdown Logic Control function is available (pin2, TTL compatible). This means that when the device is used as a local regulator, it is possible to put a SCHEMATIC DIAGRAM part of the boad in standby, decreasing the total power consumption. The regulator employs an output pin (open collector) providing a logic signal when the pass transistor is in saturation at low input voltage, this signal can be used to prevent the pop-up phenomenon in the car radio. In battery powered systems (the cellular phone, notebook) it is possible to use the flag to monitor the battery charge status through the dropout of the regulator. October 1998 1/11 L4987 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Vi Io P tot T st g T op DC Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value 40 Internally limited Internally limited - 40 to 150 - 40 to 125 Unit V mA mW o o C C Absolute Maximum Rating are those values beyond wich damage to the device may occur. Functional operation under these conditions is not implied. THERMAL DATA Symbol Parameter DPAK/PPAK 8 100 Unit o o R thj- ca se Thermal Resistance Junction-case R thj- amb Thermal Resistance Junction-ambient C/W C/W CONNECTION DIAGRAM (top view) ORDERING NUMBERS Type L4987CPT30 (*) L4987CPT50 (*) L4987CPT87 (*) L4987CPT120 (*) (*) Available even in tape & reel Output Voltage 3V 5V 8.7 V 12 V 2/11 L4987 SERIES ELECTRICAL CHARACTERISTICS FOR L4987CPT30 (refer to the test circuits, VI = 6 V, IOUT = 5 mA, Tj = 25 oC, Ci = 0.1 µF, Co = 2.2 µF unless otherwise specified) Symbol Vo Vi I o ut ∆V o ∆V o Id Parameter Output Voltage Operating Input Voltage Output Current Limit Line Regulation Load Regulation Quiescent Current Vi = 4.3 to 18 V, Io = 0.5 mA Vi = 4.1 V Io = 0.5 to 200 mA ON MODE Vi = 4.3 to 18 V Io = 0 mA Vi = 4.3 to 18 V Io = 200 mA OFF MODE Vi = 12 V SVR Supply Voltage Rejection Io = 5 mA Vi = 5.3 V ± 1V f = 120 Hz f = 1 KHz f = 10 KHz Io = 200 mA Io = 200 mA -40 < TJ < 125 C o o Test Conditions Io = 200 mA, Vi = 6 V Io = 200 mA, Vi = 6 V -40