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LP3985IM5-2.5 Datasheet(PDF) 1 Page - Texas Instruments |
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LP3985IM5-2.5 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page BYPASS LP3985 IN OUT EN 3(A1) 5(C1) 4(A3) 2(B2) 1µF 1(C3) * 1µF Pin Numbers in parenthesis indicate DSBGA package. * Optional Noise Reduction Capacitor. Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LP3985 SNVS087AE – OCTOBER 2000 – REVISED MAY 2015 LP3985 Micropower, 150-mA Low-Noise Ultra-Low-Dropout CMOS Voltage Regulator 1 Features 3 Description The LP3985 is designed for portable and wireless 1 • Input Voltage: 2.5 V to 6 V applications with demanding performance and space • 100-mV Maximum Dropout with 150-mA Load requirements. LP3985 performance is optimized for • 150-mA Verified Output battery-powered systems to deliver ultra low noise, extremely low dropout voltage, and low quiescent • 50-dB PSRR at 1 kHz at VIN = VOUT + 0.2 V current. Regulator ground current increases only • ≤ 1.5-μA Quiescent Current when Shut Down slightly in dropout, further prolonging the battery life. • Fast Turn-On time: 200 μs (typ.) The LP3985 is stable with a small 1-µF ±30% • 30- μVRMS Output Noise (typical) over 10 Hz to 100 ceramic or high-quality tantalum output capacitor. The kHz DSBGA requires the smallest possible PC board area • −40°C to 125°C Junction Temperature Range for - the total application circuit area can be less than 2 Operation mm x 2.5 mm, a fraction of a 1206 case size. • 2.5-V, 2.6-V, 2.7-V, 2.8-V, 2.85-V, 2.9-V, 3-V, 3.1- An optional external bypass capacitor reduces the V, 3.2-V, 3.3-V, 4.7-V, 4.75-V, 4.8-V and 5-V output noise without slowing down the load transient Outputs Standard response. Fast startup time is achieved by utilizing an internal power-on circuit that actively pre-charges the • Logic Controlled Enable bypass capacitor. • Stable with Ceramic and High-Quality Tantalum Power supply rejection is better than 50 dB at low Capacitors frequencies and starts to roll off at 1 kHz. High power • Fast Turnon supply rejection is maintained down to low input • Thermal Shutdown and Short-Circuit Current Limit voltage levels common to battery operated circuits. The device is ideal for mobile phone and similar 2 Applications battery-powered wireless applications. It provides up • CDMA Cellular Handsets to 150 mA, from a 2.5-V to 6-V input. The LP3985 consumes less than 1.5 µA in disable mode and has • Wideband CDMA Cellular Handsets fast turn-on time less than 200 µs. • GSM Cellular Handsets The LP3985 is available with fixed output voltages • Portable Information Appliances from 2.5 V to 5 V. Contact Texas Instruments Sales space for specific voltage option needs. Simplified Schematic Device Information(1) PART PACKAGE BODY SIZE NUMBER DSBGA (5) 1.502 mm x 1.045 mm (MAX) LP3985 SOT-23 (5) 2.90 mm x 1.60 mm (NOM) (1) For all available packages, see the Package Option Addendum at the end of the datasheet. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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