(LP2950 / LP2951) Low Power Low Dropout Voltage Regulator

www.DataSheet4U.com 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 input−to−output voltage differential. These devices feature a very low quiescent bias current of 75 mA and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided. The LP2951 has three additional features. The first is the Error Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor power−on reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 3.0 V output (depending on the version) or programmed from 1.25 V to 29 V. It consists of a pinned out resistor divider along with direct access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turn−off or turn−on the regulator output. Due to the low input−to−output voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of useful battery life is desirable. The LP2950 is available in the three pin case 29 and DPAK packages, and the LP2951 is available in the eight pin dual−in−line, SOIC−8 and Micro8 surface mount packages. The ‘A’ suffix devices feature an initial output voltage tolerance ± 0.5%. Features http://onsemi.com TO−92 Z SUFFIX CASE 29 1 23 Pin: 1. Output 2. Ground 3. Input 4 12 3 DPAK DT SUFFIX CASE 369C PIN CONNECTIONS Pin: 1. Input 2. Ground 3. Output 1 2 3 (Top View) Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. SOIC−8 D SUFFIX CASE 751 PDIP−8 N SUFFIX CASE 626 Micro8E DM SUFFIX CASE 846A • Pb−Free Packages are Available • Low Quiescent Bias Current of 75 mA • Low Input−to−Output Voltage Differential of 50 mV at 100 mA and • • • • • 380 mV at 100 mA 5.0 V, 3.3 V or 3.0 V ±0.5% Allows Use as a Regulator or Reference Extremely Tight Line and Load Regulation Requires Only a 1.0 mF Output Capacitor for Stability Internal Current and Thermal Limiting NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes 8 1 8 1 8 1 PIN CONNECTIONS Output 1 Sense 2 Shutdown 3 GND 4 (Top View) 8 7 6 5 Input Feedback VO Tap Error Output LP2951 Additional Features • Error Output Signals an Out of Regulation Condition • Output Programmable from 1.25 V to 29 V • Logic Level Shutdown Input (See Following Page for Device Information.) ORDERING & MARKING INFORMATION See detailed ordering and shipping information in the package dimensions section on pages 14 and 16 of this data sheet. See general marking information in the device marking section on page 18 of this data sheet. © Semiconductor Components Industries, LLC, 2006 1 December, 2006 − Rev. 19 Publication Order Number: LP2950/D LP2950, LP2951, NCV2951 DEVICE INFORMATION Output Voltage Package TO−92 Suffix Z DPAK Suffix DT SOIC−8 SOIC−8 Suffix D Micro8 Suffix DM DIP−8 Suffix N 3.0 V LP2950CZ−3.0 LP2950ACZ−3.0 LP2950CDT−3.0 LP2950ACDT−3.0 − LP2951CD−3.0 LP2951ACD−3.0 LP2951CDM−3.0 LP2951ACDM−3.0 LP2951CN−3.0 LP2951ACN−3.0 3.3 V LP2950CZ−3.3 LP2950ACZ−3.3 LP2950CDT−3.3 LP2950ACDT−3.3 NCV2951ACD−3.3R2 LP2951CD−3.3 LP2951ACD−3.3 LP2951CDM−3.3 LP2951ACDM−3.3 LP2951CN−3.3 LP2951ACN−3.3 5.0 V LP2950CZ−5.0 LP2950ACZ−5.0 LP2950CDT−5.0 LP2950ACDT−5.0 NCV2951ACDR2 LP2951CD LP2951ACD LP2951CDM LP2951ACDM LP2951CN LP2951ACN Adjustable Not Available Not Available NCV2951CDR2 LP2951CD LP2951ACD LP2951CDM LP2951ACDM LP2951CN LP2951ACN Operating Ambient Temperature Range TA = −40° to +125°C TA = −40° to +125°C TA = −40° to +125°C TA = −40° to +125°C TA = −40° to +125°C TA = −40° to +125°C LP2950Cx−xx / LP2951Cxx−xx LP2950ACx−xx / LP2951ACxx−xx 1% Output Voltage Precision at TA = 25°C 0.5% Output Voltage Precision at TA = 25°C Input Battery or Unregulated DC 3 182 k Error Amplifier 1.23 V Reference GND 2 Output 1 5.0 V/100 mA 1.0 mF 60 k LP2950CZ−5.0 Battery or Unregulated DC Input 8 Output 1 Sense 182 k 2 5.0 V/100 mA 1.0 mF VO Tap 6 60 k 7 Error Amplifier 60 k 50 k 75 mV/ 60 mV Feedback 330 k Shutdown From 3 CMOS/TTL Error Output 5 To CMOS/TTL 1.23 V Reference GND 4 Error Detection Comparator LP2951CD or CN This device contains 34 active transistors. Figure 1. Representative Block Diagrams http://onsemi.com 2 LP2950, LP2951, NCV2951 MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.) Rating Input Voltage Peak Transient Input Voltage (t < 20 ms) Power Dissipation and Thermal Characteristics Maximum Power Dissipation Case 751(SOIC−8) D Suffix Symbol VCC VCC PD Value 30 32 Unit Vdc Vdc ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ Internally Limited 180 45 92 6.0 160 83 105 240 −1.5 to +30 −0.3 to +30 −0.3 to +30 −40 to +125 +150 −65 to +150 W Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Case 369A (DPAK) DT Suffix (Note 1) Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Case 29 (TO−226AA/TO−92) Z Suffix Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Case 626 N Suffix Thermal Resistance, Junction−to−Ambient Case 846A (Micro8) DM Suffix Thermal Resistance, Junction−to−Ambient Feedback Input Voltage Shutdown Input Voltage Error Comparator Output Voltage Operating Ambient Temperature Range Maximum Die Junction Temperature Range Storage Temperature Range RqJA Vfb Vsd Verr TA TJ Tstg °C/W Vdc Vdc Vdc °C °C °C RqJA °C/W RqJA RqJC °C/W °C/W RqJA RqJC °C/W °C/W RqJA °C/W °C/W RqJC Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. http://onsemi.com 3 LP2950, LP2951, NCV2951 ELECTRICAL CHARACTERISTICS (Vin = VO + 1.0 V, IO = 100 mA, CO = 1.0 mF, TA = 25°C [Note 3], unless otherwise noted.) Characteristic Output Voltage, 5.0 V Versions Vin = 6.0 V, IO = 100 mA, TA = 25°C LP2950C−5.0/LP2951C/NCV2951C* LP2950AC−5.0/LP2951AC/NCV2951AC* TA = − 40 to +125°C LP2950C−5.0/LP2951C/NCV2951C* LP2950AC−5.0/LP2951AC/NCV2951AC* Vin = 6.0 to 30 V, IO = 100 mA to 100 mA, TA = − 40 to +125°C LP2950C−5.0/LP2951C/NCV2951C* LP2950AC−5.0/LP2951AC/NCV2951AC* Output Voltage, 3.3 V Versions Vin = 4.3 V, IO = 100 mA, TA = 25°C LP2950C−3.3/LP2951C−3.3 LP2950AC−3.3/LP2951AC−3.3/NCV2951AC−3.3* TA = − 40 to +125°C LP2950C−3.3/LP2951C−3.3 LP2950AC−3.3/LP2951AC−3.3/NCV2951AC−3.3* Vin = 4.3 to 30 V, IO = 100 mA to 100 mA, TA = − 40 to +125°C LP2950C−3.3/LP2951C−3.3 LP2950AC−3.3/LP2951AC−3.3/NCV2951AC−3.3* Output Voltage, 3.0 V Versions Vin = 4.0 V, IO = 100 mA, TA = 25°C LP2950C−3.0/LP2951C−3.0 LP2950AC−3.0/LP2951AC−3.0 TA = − 40 to +125°C LP2950C−3.0/LP2951C−3.0 LP2950AC−3.0/LP2951AC−3.0 Vin = 4.0 to 30 V, IO = 100 mA to 100 mA, TA = − 40 to +125°C LP2950C−3.0/LP2951C−3.0 2.928 − 3.072 3.042 LP2950AC−3.0/LP2951AC−3.0 2.958 − 1. The Junction−to−Ambient Thermal Resistance is determined by PCB copper area per Figure 29. 2. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM), 2000 V, Class 2, JESD22 A114−C Machine Model (MM), 200 V, Class B, JESD22 A115−A Charged Device Model (CDM), 2000 V, Class IV, JESD22 C101−C 3. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 4. VO(nom) is the part number voltage option. 5. Noise tests on the LP2951 are made with a 0.01 mF capacitor connected across Pins 7 and 1. *NCV prefix is for automotive and other applications requiring site and change control. 2.940 2.964 − − 3.060 3.036 2.970 2.985 3.000 3.000 3.030 3.015 VO 3.221 3.254 − − 3.379 3.346 V 3.234 3.260 − − 3.366 3.340 3.267 3.284 3.300 3.300 3.333 3.317 VO 4.880 4.925 − − 5.120 5.075 V 4.900 4.940 − − 5.100 5.060 4.950 4.975 5.000 5.000 5.050 5.025 Symbol VO Min Typ Max Unit V http://onsemi.com 4 LP2950, LP2951, NCV2951 ELECTRICAL CHARACTERISTICS (continued) (Vin = VO + 1.0 V, IO = 100 mA, CO = 1.0 mF, TA = 25°C [Note 8], unless otherwise noted.) Characteristic Line Regulation (Vin = VO(nom) +1.0 V to 30 V) (Note 9) LP2950C−XX/LP2951C/LP2951C−XX/NCV2951C* LP2950AC−XX/LP2951AC/LP2951AC−XX/NCV2951AC* Load Regulation (IO = 100 mA to 100 mA) LP2950C−XX/LP2951C/LP2951C−XX/NCV2951C* LP2950AC−XX/LP2951AC/LP2951AC−XX/NCV2951AC* Dropout Voltage IO = 100 mA IO = 100 mA Supply Bias Current IO = 100 mA IO = 100 mA Dropout Supply Bias Current (Vin = VO(nom) − 0.5 V, IO = 100 mA) (Note 9) Current Limit (VO Shorted to Ground) Thermal Regulation Output Noise Voltage (10 Hz to 100 kHz) (Note 10) CL = 1.0 mF CL = 100 mF LP2951A/LP2951AC Only Reference Voltage (TA = 25°C) LP2951C/LP2951C−XX/NCV2951C* LP2951AC/LP2951AC−XX/NCV2951AC* Reference Voltage (TA = − 40 to +125°C) LP2951C/LP2951C−XX/NCV2951C* LP2951AC/LP2951AC−XX/NCV2951AC* Reference Voltage (TA = − 40 to +125°C) IO = 100 mA to 100 mA, Vin = 23 to 30 V LP2951C/LP2951C−XX/NCV2951C* LP2951AC/LP2951AC−XX/NCV2951AC* Feedback Pin Bias Current Error Comparator Output Leakage Current (VOH = 30 V) Output Low Voltage (Vin = 4.5 V, IOL = 400 mA) Upper Threshold Voltage (Vin = 6.0 V) Lower Threshold Voltage (Vin = 6.0 V) Hysteresis (Vin = 6.0 V) Shutdown Input Input Logic Voltage Logic “0” (Regulator “On”) Logic “1” (Regulator “Off”) Shutdown Pin Input Current