Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors

LP2985 Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator March 2000 LP2985 Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors General Description The LP2985 is a 150 mA, fixed-output voltage regulator designed to provide ultra low-dropout and low noise in battery powered applications. Using an optimized VIP™ (Vertically Integrated PNP) process, the LP2985 delivers unequalled performance in all specifications critical to battery-powered designs: Dropout Voltage: Typically 300 mV @ 150 mA load, and 7 mV @ 1 mA load. Ground Pin Current: Typically 850 µA @ 150 mA load, and 75 µA @ 1 mA load. Enhanced Stability: The LP2985 is stable with output capacitor ESR as low as 5 mΩ, which allows the use of ceramic capacitors on the output. 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% tolerance output voltages available (A grade). Low Noise: By adding a 10 nF bypass capacitor, output noise can be reduced to 30 µV (typical). Multiple voltage options, from 2.5V to 5.0V, are available as standard products. Consult factory for custom voltages. Features n n n n n n n n n n n n n n Ultra low dropout voltage Guaranteed 150 mA output current Smallest possible size (SOT-23, micro SMD package) Requires minimum external components Stable with low-ESR output capacitor < 1 µA quiescent current when shut down Low ground pin current at all loads Output voltage accuracy 1% (A Grade) High peak current capability 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 DS100140-1 VIP™ is a trademark of National Semiconductor Corporation. © 2000 National Semiconductor Corporation DS100140 www.national.com LP2985 Basic Application Circuit DS100140-2 *ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used. **Minimum capacitance is shown to ensure stability (may be increased without limit). Ceramic capacitor required for output (see Application Hints). ***Reduces output noise (may be omitted if application is not noise critical). Use ceramic or film type with very low leakage current (see Application Hints). Connection Diagrams 5-Lead Small Outline Package (M5) micro SMD, 5 Bump Package (BPA05) DS100140-44 DS100140-3 Bottom View See NS Package Number BPA05 Top View See NS Package Number MF05A For ordering information see Table 1 www.national.com 2 LP2985 Ordering Information TABLE 1. Package Marking and Ordering Information Output Voltage (V) 2.5 2.5 2.5 2.5 2.7 2.7 2.7 2.7 2.8 2.8 2.8 2.8 2.9 2.9 2.9 2.9 3.0 3.0 3.0 3.0 3.1 3.1 3.1 3.1 3.2 3.2 3.2 3.2 3.3 3.3 3.3 3.3 3.5 3.5 3.5 3.5 3.6 3.6 3.6 3.6 3.8 3.8 3.8 3.8 4.0 Grade Order Information Package Marking LAUA LAUA LAUB LAUB LALA LALA LALB LALB L0KA L0KA L0KB L0KB LAXA LAXA LAXB LAXB L0OA L0OA L0OB L0OB L0PA L0PA L0PB L0PB L0QA L0QA L0QB L0QB L0RA L0RA L0RB L0RB LAIA LAIA LAIB LAIB L0SA L0SA L0SB L0SB L0YA L0YA L0YB L0YB L0TA Supplied as: 5-Lead Small Outline Package (M5) A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A LP2985AIM5X-2.5 LP2985AIM5-2.5 LP2985IM5X-2.5 LP2985IM5-2.5 LP2985AIM5X-2.7 LP2985AIM5-2.7 LP2985IM5X-2.7 LP2985IM5-2.7 LP2985AIM5X-2.8 LP2985AIM5-2.8 LP2985IM5X-2.8 LP2985IM5-2.8 LP2985AIM5X-2.9 LP2985AIM5-2.9 LP2985IM5X-2.9 LP2985IM5-2.9 LP2985AIM5X-3.0 LP2985AIM5-3.0 LP2985IM5X-3.0 LP2985IM5-3.0 LP2985AIM5X-3.1 LP2985AIM5-3.1 LP2985IM5X-3.1 LP2985IM5-3.1 LP2985AIM5X-3.2 LP2985AIM5-3.2 LP2985IM5X-3.2 LP2985IM5-3.2 LP2985AIM5X-3.3 LP2985AIM5-3.3 LP2985IM5X-3.3 LP2985IM5-3.3 LP2985AIM5X-3.5 LP2985AIM5-3.5 LP2985IM5X-3.5 LP2985IM5-3.5 LP2985AIM5X-3.6 LP2985AIM5-3.6 LP2985IM5X-3.6 LP2985IM5-3.6 LP2985AIM5X-3.8 LP2985AIM5-3.8 LP2985IM5X-3.8 LP2985IM5-3.8 LP2985AIM5X-4.0 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 3 www.national.com LP2985 Ordering Information Output Voltage (V) 4.0 4.0 4.0 4.7 4.7 4.7 4.7 4.8 4.8 4.8 4.8 5.0 5.0 5.0 5.0 2.5 2.5 2.5 2.5 2.8 2.8 2.8 2.8 3.3 3.3 3.3 3.3 Grade (Continued) TABLE 1. Package Marking and Ordering Information (Continued) Order Information Package Marking L0TA L0TB L0TB LAJA LAJA LAJB LAJB LAKA LAKA LAKB LAKB L0UA L0UA L0UB L0UB Supplied as: 5-Lead Small Outline Package (M5) A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD A A STD STD LP2985AIM5-4.0 LP2985IM5X-4.0 LP2985IM5-4.0 LP2985AIM5X-4.7 LP2985AIM5-4.7 LP2985IM5X-4.7 LP2985IM5-4.7 LP2985AIM5X-4.8 LP2985AIM5-4.8 LP2985IM5X-4.8 LP2985IM5-4.8 LP2985AIM5X-5.0 LP2985AIM5-5.0 LP2985IM5X-5.0 LP2985IM5-5.0 LP2985AIBP-2.5 LP2985AIBPX-2.5 LP2985IBP-2.5 LP2985IBPX-2.5 LP2985AIBP-2.8 LP2985AIBPX-2.8 LP2985IBP-2.8 LP2985IBPX-2.8 LP2985AIBP-3.3 LP2985AIBPX-3.3 LP2985IBPX-3.3 LP2985IBPX-3.3 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel 250 Units on Tape and Reel 3000 Units on Tape and Reel 250 Units on Tape and Reel 3000 Units on Tape and Reel 250 Units on Tape and Reel 3000 Units on Tape and Reel 250 Units on Tape and Reel 3000 Units on Tape and Reel 250 Units on Tape and Reel 3000 Units on Tape and Reel 250 Units on Tape and Reel 3000 Units on Tape and Reel micro SMD, 5 Bump Package (BPA05) www.national.com 4 LP2985 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Junction Temperature Range Lead Temp. (Soldering, 5 sec.) ESD Rating (Note 2) Power Dissipation (Note 3) −65˚C to +150˚C −40˚C to +125˚C 260˚C 2 kV Internally Limited Input Supply Voltage (Survival) Input Supply Voltage (Operating) Shutdown Input Voltage (Survival) Output Voltage (Survival, (Note 4)) IOUT (Survival) Input-Output Voltage (Survival, (Note 5)) −0.3V to +16V 2.5V to +16V −0.3V to +16V −0.3V to +9V Short Circuit Protected −0.3V to +16V Electrical Characteristics Limits in standard typeface are for TJ = 25˚C. and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V. LP2985AI-X.X Symbol ∆VO Parameter Output Voltage Tolerance Conditions IL = 1 mA 1 mA ≤ IL ≤ 50 mA 1 mA ≤ IL ≤ 150 mA Output Voltage Line Regulation VIN–VO Dropout Voltage (Note 7) IL = 0 IL = 1 mA IL = 10 mA IL = 50 mA IL = 150 mA IGND Ground Pin Current IL = 0 IL = 1 mA IL = 10 mA IL = 50 mA IL = 150 mA VON/OFF < 0.3V VON/OFF < 0.15V VON/OFF ION/OFF en ON/OFF Input Voltage (Note 8) ON/OFF Input Current Output Noise Voltage (RMS) High = O/P ON Low = O/P OFF VON/OFF = 0 VON/OFF = 5V BW = 300 Hz to 50 kHz, COUT = 10 µF CBYPASS = 10 nF 30 µV 1 7 40 120 280 65 75 120 350 850 0.01 0.05 1.4 0.55 0.01 5 1.6 0.15 −2 15 VO(NOM)+1V ≤ VIN ≤ 16V 0.007 Typ (Note 6) Min −1.0 −1.5 −2.5 −2.5 −3.5 Max 1.0 1.5 2.5 2.5 3.5 0.014 0.032 3 5 10 15 60 90 150 225 350 575 95 125 110 170 220 400 600 1000 1500 2500 0.8 2 1.6 0.15 −2 15 LP2985I-X.X (Note 6) Min −1.5 −2.5 −3.5 −3.0 −4.0 Max 1.5 2.5 3.5 3.0 4.0 0.014 0.032 3 5 10 15 60 90 150 225 350 575 95 125 110 170 220 400 600 1000 1500 2500 0.8 2 V µA µA mV %/V %VNOM Units 5 www.national.com LP2985 Electrical Characteristics (Continued) Limits in standard typeface are for TJ = 25˚C. and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V. LP2985AI-X.X Symbol Parameter Ripple Rejection Conditions f = 1 kHz, CBYPASS = 10 nF COUT = 10 µF IO(SC) IO(PK) Short Circuit Current Peak Output Current RL = 0 (Steady State) (Note 9) VOUT ≥ Vo(NOM) −5% 45 dB Typ (Note 6) Min Max LP2985I-X.X (Note 6) Min Max Units 400 350 mA mA Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. Note 2: The