|Category||Power Management => Regulators => Linear Regulators => LDO (Low Drop Out)|
|Description||1.8V- Very Low Drop Regulator|
|Company||ST Microelectronics, Inc.|
|Datasheet||Download LD2980ABM18TR datasheet
|Cross ref.||Similar parts: LM3490, LP2980-N, LP2981-29, LP2981-30, LP2981-33, LP2981-50, LP2981-N, LP2981A-29, LP2981A-30, LP2981A-33|
|ULTRA LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
STABLE WITH LOW ESR CERAMIC CAPACITORS ULTRA LOW DROPOUT VOLTAGE (0.12V TYP. AT 50mA LOAD, 7mV TYP. AT 1mA LOAD) VERY LOW QUIESCENT CURRENT (80µA TYP. AT NO LOAD IN ON MODE; MAX 1µA IN OFF MODE) GUARANTEED OUTPUT CURRENT TO 50mA LOGIC-CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGE OF 5.0V INTERNAL CURRENT AND THERMAL LIMIT ± 0.5% TOLERANCE OUTPUT VOLTAGE AVAILABLE (A VERSION) OUTPUT LOW NOISE VOLTAGE 160µVRMS TEMPERATURE RANGE: TO 125°C SMALLEST PACKAGE SOT23-5L AND SOT-89 FAST DYNAMIC RESPONSE TO LINE AND LOAD CHANGES
DESCRIPTION The LD2980 series are 50mA fixed-output voltage regulator. The low drop-voltage and the ultra low SCHEMATIC DIAGRAM
quiescent current make them suitable for low noise, low power applications and in battery powered systems. The quiescent current in sleep mode is less than 1µA when INHIBIT pin is pulled low. Shutdown Logic Control function is available on pin n.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. The LD2980 is designed to work with low ESR ceramic capacitor. Typical applications are in cellular phone, palmtop/laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.
Symbol VI VINH IO PD TSTG TOP DC Input Voltage INHIBIT Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value to 16 Internally limited Internally limited 125 °C Unit V
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.Symbol Rthj-amb Parameter Thermal Resistance Junction-ambient 15 110 Unit °C/W
Pin 2 3 Pin 3 2 Symbol VIN GND INHIBIT Input Port Ground Pin Control switch ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. Disable the device when connected to GND to a positive voltage less than 0.18V Not Connected Output Port Name and Function
Inhibit Pin is not internally pulled-up then it must not be left floating. Disable the device when connected to GND to a positive voltage less than 0.18V.
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