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Part: LP2951CN
Category:
Power Management
-> Regulators
-> Linear Voltage Regulators
-> LDO (Low Drop Out)
Description: 100mA, 3.3V or Adjustable, Low Power Low Dropout Voltage Regulator With Error Flag Output <<<>>>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 a And Are Capable of Supplying<<<>>>output Currents in Excess of 100 MA. Internal Current And Thermal<<<>>>limiting Protection is Provided.
Company: ON Semiconductor
Datasheet: Download LP2951CN datasheet File size : 606 kB
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Datasheet text preview:
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, SO-8 and Micro8 surface mount packages. The `A' suffix devices feature an initial output voltage tolerance ฑ 0.5%.
LP2950 and LP2951 Features: http://onsemi.com
TO-92 Z SUFFIX CASE 29 1 2 3
Pin: 1. Output 2. Ground 3. Input
DPAK DT SUFFIX CASE 369A
1 3
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. SO-8 D SUFFIX CASE 751
ท Low Quiescent Bias Current of 75 mA ท Low Input-to-Output Voltage Differential of 50 mV at 100 mA and ท ท ท ท
380 mV at 100 mA 5.0 V, 3.3 V or 3.0 V ฑ 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
8 1
PDIP-8 N SUFFIX CASE 626
8 1
LP2951 Additional Features:
ท Error Output Signals an Out of Regulation Condition ท Output Programmable from 1.25 V to 29 V ท Logic Level Shutdown Input
(See Following Page for Device Information.)
Micro8E DM SUFFIX CASE 846A
8 1
PIN CONNECTIONS
Output 1 Sense 2 Shutdown 3 GND 4 (Top View) 8 7 6 5 Input Feedback VO Tap Error Output
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on pages 13 and 14 of this data sheet.
ฉ Semiconductor Components Industries, LLC, 2004
1
April, 2004 - Rev. 11
Publication Order Number: LP2950/D
LP2950, LP2951, NCV2951
DEVICE INFORMATION Output Voltage Package TO-92 Suffix Z DPAK Suffix DT SO-8 SO-8 Suffix D Micro8 Suffix DM DIP-8 Suffix N 3.0V 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 3.3V 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 5.0V 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 Ambient Temperature Range TA = -40ฐ to +125ฐC TA = -40ฐ to +125ฐC TA = -40ฐ to +125ฐC TA = -40ฐ to +125ฐC TA = -40ฐ to +125ฐC TA = -40ฐ to +125ฐC
LP2950Cx-xx / LP2951Cxx-xx LP2950ACx-xx / LP2951ACxx-xx
1% Output Voltage Precision at TA = 25ฐC 0.5% Output Voltage Precision at TA = 25ฐC
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 = 25ฐC, unless otherwise noted.)
Rating Input Voltage Power Dissipation and Thermal Characteristics Maximum Power Dissipation Case 751(SO-8) D Suffix 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 Symbol VCC PD Value 30 Unit Vdc W
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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 Rq J A Rq J C Rq J A Rq J C Rq J A Rq J C Rq J A Rq J A Vfb Vsd Verr TA TJ Tstg ฐC/W ฐC/W ฐC/W ฐC/W ฐC/W ฐC/W ฐC/W ฐC/W Vdc Vdc Vdc ฐC ฐC ฐC
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ELECTRICAL CHARACTERISTICS (Vin = VO + 1.0 V, IO = 100 mA, CO = 1.0 mF, TA = 25ฐC [Note 3], unless otherwise noted.) Symbol Min Typ Max Characteristic Output Voltage, 5.0 V Versions Vin = 6.0 V, IO = 100 mA, TA = 25ฐC LP2950C-5.0/LP2951C/NCV2951C* LP2950AC-5.0/LP2951AC/NCV2951AC* TA = - 40 to +125ฐC 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 +125ฐC LP2950C-5.0/LP2951C/NCV2951C* LP2950AC-5.0/LP2951AC/NCV2951AC* Output Voltage, 3.3 V Versions Vin = 4.3 V, IO = 100 mA, TA = 25ฐC LP2950C-3.3/LP2951C-3.3 LP2950AC-3.3/LP2951AC-3.3/NCV2951AC-3.3* TA = - 40 to +125ฐC 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 +125ฐC LP2950C-3.3/LP2951C-3.3 LP2950AC-3.3/LP2951AC-3.3/NCV2951AC-3.3* VO 4.950 4.975 4.900 4.940 4.880 4.925 VO 3.267 3.284 3.234 3.260 3.221 3.254 3.300 3.300 - - - - 3.333 3.317 3.366 3.340 3.379 3.346 V 3.030 3.015 3.060 3.036 3.072 3.042 5.000 5.000 - - - - 5.050 5.025 5.100 5.060 5.120 5.075 V Unit V Output Voltage, 3.0 V Versions VO Vin = 4.0 V, IO = 100 mA, TA = 25ฐC LP2950C-3.0/LP2951C-3.0 2.970 3.000 LP2950AC-3.0/LP2951AC-3.0 2.985 3.000 TA = - 40 to +125ฐC LP2950C-3.0/LP2951C-3.0 2.940 - LP2950AC-3.0/LP2951AC-3.0 2.964 - Vin = 4.0 to 30 V, IO = 100 mA to 100 mA, TA = - 40 to +125ฐC LP2950C-3.0/LP2951C-3.0 2.928 - LP2950AC-3.0/LP2951AC-3.0 2.958 - 1. The Junction-to-Ambient Thermal Resistance is determined by PC board copper area per Figure 27. 2. ESD data available upon request. 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.
http://onsemi.com
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