Document
LP2982 Micropower 50 mA Ultra Low-Dropout Regulator
March 2000
LP2982 Micropower 50 mA Ultra Low-Dropout Regulator
General Description
The LP2982 is a 50 mA, fixed-output voltage regulator designed to provide ultra low dropout and lower noise in battery powered applications. Using an optimized VIP™ (Vertically Integrated PNP) process, the LP2982 delivers unequaled performance in all specifications critical to battery-powered designs: Dropout Voltage: Typically 120 mV @ 50 mA load, and 7 mV @ 1 mA load. Ground Pin Current: Typically 375 µA @ 50 mA load, and 80 µA @ 1 mA load. Sleep Mode: Less than 1 µA quiescent current when on/off pin is pulled low. Smallest Possible Size: SOT-23 and micro SMD packages use absolute minimum board space. Precision Output: 1.0% tolerance output voltages available (A grade). Low Noise: By adding an external bypass capacitor, output noise can be reduced to 30 µV (typical). Ten output voltage versions, from 2.5V to 5.0V, are available as standard products.
Features
n n n n n n n n n n n n n n Ultra low dropout voltage Guaranteed 50 mA output current Typical dropout voltage 180 mV @ 80 mA Smallest possible size (SOT-23, micro SMD package) Requires minimum external components < 1 µA quiescent current when shutdown Low ground pin current at all loads Output voltage accuracy 1.0% (A Grade) High peak current capability (150 mA typical) Wide supply voltage range (16V max) Low ZOUT 0.3Ω typical (10 Hz to 1 MHz) Overtemperature/overcurrent protection −40˚C to +125˚C junction temperature range Custom voltages available
Applications
n n n n Cellular Phone Palmtop/Laptop Computer Personal Digital Assistant (PDA) Camcorder, Personal Stereo, Camera
Block Diagram
DS012679-1
VIP™ is a trademark of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation
DS012679
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LP2982
Connection Diagrams
5-Lead Small Outline Package (M5) micro SMD, 5 Bump Package (BPA05)
DS012679-55 DS012679-3
Top View See NS Package Number MF05A For ordering information see Table 1
Bottom View See NS Package Number BPA05
Basic Application Circuit
DS012679-2
*ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used. **Minimum capacitance is shown to insure stability over full load current range. More capacitance provides superior dynamic performance (see Application
Hints). ***See Application Hints.
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LP2982
Ordering Information
TABLE 1. Package Marking and Ordering Information Output Voltage (V) 2.5 2.5 2.5 2.5 2.6 2.6 2.6 2.6 2.8 2.8 2.8 2.8 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 3.6 3.6 3.6 3.6 3.8 3.8 3.8 3.8 4.0 4.0 4.0 4.0 4.5 4.5 4.5 4.5 4.7 4.7 4.7 4.7 5.0 5.0 5.0 5.0 5.3 Package Marking L58A L58A L58B L58B LBYA LBYA LBYB LBYB L60A L60A L60B L60B L20A L20A L20B L20B L19A L19A L19B L19B L0BA L0BA L0BB L0BB L76A L76A L76B L76B L29A L29A L29B L29B LA8A LA8A LA8B LA8B L0HA L0HA L0HB L0HB L18A L18A L18B L18B LBZA
Grade A A STD STD A A STD STD A A STD STD A A STD.