LP2950, LP2951, NCV2951 100 mA, Low Power Low Dropout Voltage Regulator The LP2950 and LP2951 are micropower voltage regulators that are specifically designed to maintain proper regulation with an extremely low inputtooutput voltage differential. These devices feature a very www.onsemi.com low quiescent bias current of 75 A and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided. TO92 The LP2951 has three additional features. The first is the Error CASE 29 Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor poweron reset. The Pin: 1. Output second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 2. Ground 1 1 3.0 V output (depending on the version) or programmed from 1.25 V 2 2 3. Input 3 3 to 29 V. It consists of a pinned out resistor divider along with direct STRAIGHT LEAD BENT LEAD access to the Error Amplifier feedback input. The third feature is BULK PACK TAPE & REEL AMMO PACK a Shutdown input that allows a logic level signal to turnoff or turnon the regulator output. Due to the low inputtooutput voltage differential and bias current PIN CONNECTIONS 4 specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of Pin: 1. Input 2 1 2. Ground 3 useful battery life is desirable. The LP2950 is available in the three 3. Output 12 3 pin case 29 and DPAK packages, and the LP2951 is available in the DPAK CASE 369C eight pin dualinline, SOIC8 and Micro8 surface mount packages. The A suffix devices feature an initial output voltage tolerance (Top View) 0.5%. Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. Features Low Quiescent Bias Current of 75 A SOIC8 Low InputtoOutput Voltage Differential of 50 mV at 100 A and CASE 751 8 380 mV at 100 mA 1 5.0 V, 3.3 V or 3.0 V 0.5% Allows Use as a Regulator or Reference PDIP8 Extremely Tight Line and Load Regulation CASE 626 Requires Only a 1.0 F Output Capacitor for Stability 8 Internal Current and Thermal Limiting 1 NCV Prefix for Automotive and Other Applications Requiring Micro8 8 CASE 846A Unique Site and Control Change Requirements AECQ100 1 Qualified and PPAP Capable These Devices are PbFree and RoHS Compliant PIN CONNECTIONS Output18 Input LP2951 Additional Features 2 7 Sense Feedback Error Output Signals an Out of Regulation Condition Shutdown 3 6 Output Programmable from 1.25 V to 29 V V Tap O GND 4 5 Logic Level Shutdown Input Error Output (See Following Page for Device Information.) (Top View) ORDERING & MARKING INFORMATION See detailed ordering and shipping information in the package dimensions section on pages 14 and 15 of this data sheet. See general marking information in the device marking section on page 17 of this data sheet. Semiconductor Components Industries, LLC, 1995 1 Publication Order Number: October, 2016 Rev. 29 LP2950/DLP2950, LP2951, NCV2951 DEVICE INFORMATION Output Voltage Operating Ambient 3.0 V 3.3 V 5.0 V Adjustable Temperature Range Package TO92 LP2950CZ3.0 LP2950CZ3.3 LP2950CZ5.0 Not T = 40 to +125C A Suffix Z LP2950ACZ3.0 LP2950ACZ3.3 LP2950ACZ5.0 Available DPAK LP2950CDT3.0 LP2950CDT3.3 LP2950CDT5.0 Not T = 40 to +125C A Suffix DT LP2950ACDT3.0 LP2950ACDT3.3 LP2950ACDT5.0 Available SOIC8 NCV2951ACD3.3R2 NCV2951ACDR2 NCV2951CDR2 T = 40 to +125C A SOIC8 LP2951CD3.0 LP2951CD3.3 LP2951CD LP2951CD T = 40 to +125C A Suffix D LP2951ACD3.0 LP2951ACD3.3 LP2951ACD LP2951ACD Micro8 LP2951CDM3.0 LP2951CDM3.3 LP2951CDM LP2951CDM T = 40 to +125C A Suffix DM LP2951ACDM3.0 LP2951ACDM3.3 LP2951ACDM LP2951ACDM DIP8 LP2951CN3.0 LP2951CN3.3 LP2951CN LP2951CN T = 40 to +125C A Suffix N LP2951ACN3.0 LP2951ACN3.3 LP2951ACN LP2951ACN LP2950Cxxx / LP2951Cxxxx 1% Output Voltage Precision at T = 25C A LP2950ACxxx / LP2951ACxxxx 0.5% Output Voltage Precision at T = 25C A Input Output 5.0 V/100 mA 1 3 1.0 F Battery or 182 k Unregulated DC Error Amplifier 60 k 1.23 V Reference LP2950CZ5.0 GND 2 5.0 V/100 mA Input 8 Output Sense 2 1 Battery or 1.0 F Unregulated DC 182 k V Tap O 6 60 k 330 k 7 Feedback Error Amplifier Shutdown From 3 60 k 75 mV/ CMOS/TTL 50 k Error 60 mV Output To CMOS/TTL 5 Error Detection 1.23 V Comparator Reference LP2951CD or CN GND 4 This device contains 34 active transistors. Figure 1. Representative Block Diagrams www.onsemi.com 2