DATA SHEET www.onsemi.com Voltage Regulator - Low Power Low, Dropout TO92 CASE 2910 100 mA Pin: 1. Output 2. Ground LP2950, LP2951, NCV2951 1 3. Input 1 2 2 3 3 The LP2950 and LP2951 are micropower voltage regulators that are STRAIGHT LEAD BENT LEAD specifically designed to maintain proper regulation with an extremely low inputtooutput voltage differential. These devices feature a very PIN CONNECTIONS low quiescent bias current of 75 A and are capable of supplying 4 output currents in excess of 100 mA. Internal current and thermal Pin: 1. Input 2 limiting protection is provided. 1 2. Ground 3 The LP2951 has three additional features. The first is the Error 3. Output 12 3 DPAK Output that can be used to signal external circuitry of an out of CASE 369C regulation condition, or as a microprocessor poweron reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or (Top View) 3.0 V output (depending on the version) or programmed from 1.25 V Heatsink surface (shown as terminal 4 in to 29 V. It consists of a pinned out resistor divider along with direct case outline drawing) is connected to Pin 2. access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turnoff or turnon SOIC8 8 the regulator output. CASE 751 1 Due to the low inputtooutput voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of PDIP8 CASE 626 useful battery life is desirable. The LP2950 is available in the three 8 pin case 29 and DPAK packages, and the LP2951 is available in the 1 eight pin dual in line, SOIC 8 and Micro8 surface mount packages. 8 Micro8 The A suffix devices feature an initial output voltage tolerance CASE 846A 1 0.5%. Features PIN CONNECTIONS Low Quiescent Bias Current of 75 A 18 Output Input Low InputtoOutput Voltage Differential of 50 mV at 100 A and 2 7 380 mV at 100 mA Sense Feedback 5.0 V, 3.3 V or 3.0 V 0.5% Allows Use as a Regulator or Reference Shutdown 3 6 V Tap O Extremely Tight Line and Load Regulation GND 4 5 Error Output Requires Only a 1.0 F Output Capacitor for Stability (Top View) Internal Current and Thermal Limiting NCV Prefix for Automotive and Other Applications Requiring ORDERING INFORMATION Unique Site and Control Change Requirements AECQ100 See detailed ordering and shipping information in the package Qualified and PPAP Capable dimensions section on pages 14 and 15 of this data sheet. These Devices are PbFree and RoHS Compliant DEVICE MARKING INFORMATION LP2951 Additional Features See general marking information in the device marking Error Output Signals an Out of Regulation Condition section on page 16 of this data sheet. Output Programmable from 1.25 V to 29 V Logic Level Shutdown Input (See Following Page for Device Information.) Semiconductor Components Industries, LLC, 1995 1 Publication Order Number: October, 2021 Rev. 34 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