NCV2951 ON Semiconductor, NCV2951 Datasheet

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NCV2951

Manufacturer Part Number
NCV2951
Description
100 Ma, Low Power Low Dropout Voltage Regulator
Manufacturer
ON Semiconductor
Datasheet

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LP2950, LP2951, NCV2951
100 mA, Low Power Low
Dropout Voltage Regulator
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.
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.
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
LP2951 Additional Features
© Semiconductor Components Industries, LLC, 2007
July, 2007 - Rev. 20
The LP2950 and LP2951 are micropower voltage regulators that are
The LP2951 has three additional features. The first is the Error
Due to the low input-to-output voltage differential and bias current
380 mV at 100 mA
and Control Changes
Low Quiescent Bias Current of 75 mA
Low Input-to-Output Voltage Differential of 50 mV at 100 mA and
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
Pb-Free Packages are Available
NCV Prefix for Automotive and Other Applications Requiring Site
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.)
1
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.
ORDERING & MARKING INFORMATION
case outline drawing) is connected to Pin 2.
Heatsink surface (shown as terminal 4 in
Shutdown
CASE 369C
DT SUFFIX
Z SUFFIX
CASE 29
TO-92
DPAK
Output
Sense
DM SUFFIX
CASE 846A
CASE 751
CASE 626
D SUFFIX
N SUFFIX
GND
Micro8E
SOIC-8
PDIP-8
(Top View)
1
PIN CONNECTIONS
PIN CONNECTIONS
http://onsemi.com
2
1
2
3
4
1
(Top View)
2 3
3
Publication Order Number:
Pin: 1. Input
8
1 2
8
8
7
6
5
2. Ground
3. Output
Pin: 1. Output
8
Input
Feedback
V
Error Output
3
1
1
O
2. Ground
3. Input
1
Tap
LP2950/D
4

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NCV2951 Summary of contents

Page 1

... 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 and are capable of supplying output currents in excess of 100 mA ...

Page 2

... Micro8 Suffix DM LP2951ACDM-3.0 LP2951CN-3.0 DIP-8 Suffix N LP2951ACN-3.0 LP2950Cx-xx / LP2951Cxx-xx LP2950ACx-xx / LP2951ACxx-xx Battery or Unregulated DC Battery or Unregulated DC Shutdown From CMOS/TTL LP2950, LP2951, NCV2951 Output Voltage 3.3 V 5.0 V LP2950CZ-3.3 LP2950CZ-5.0 LP2950ACZ-3.3 LP2950ACZ-5.0 LP2950CDT-3.3 LP2950CDT-5.0 LP2950ACDT-3.3 LP2950ACDT-5.0 NCV2951ACD-3.3R2 NCV2951ACDR2 LP2951CD-3.3 LP2951CD LP2951ACD-3.3 LP2951ACD LP2951CDM-3.3 LP2951CDM LP2951ACDM-3 ...

Page 3

... 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. LP2950, LP2951, NCV2951 Rating http://onsemi.com ...

Page 4

... Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible the part number voltage option. O(nom) 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. LP2950, LP2951, NCV2951 = 100 mA 1 ...

Page 5

... Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible the part number voltage option. O(nom) 10. 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. LP2950, LP2951, NCV2951 = 100 mA 1 ...

Page 6

... T , AMBIENT TEMPERATURE (°C) A Figure 4. Output Voltage versus Temperature LP2950, LP2951, NCV2951 DEFINITIONS Output Noise Voltage - The RMS ac voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Leakage Current - Current drawn through a bipolar transistor collector-base junction, under a specified collector voltage, when the transistor is “ ...

Page 7

... T = 25° 5.5 0 100 200 300 400 500 t, TIME (ms) Figure 10. Line Transient Response LP2950, LP2951, NCV2951 400 350 T = 25°C A 300 250 200 150 100 Figure 7. Dropout Voltage versus Output Current 5.0 55 LP2951C R = 330 ...

Page 8

... FREQUENCY (Hz) Figure 14. Output Noise 100 75° LP2951CN INPUT VOLTAGE (V) in Figure 16. Maximum Rated Output Current LP2950, LP2951, NCV2951 80 400 60 200 V out 200 T = 25° 1 6 400 V = 5.0 V out ...

Page 9

... V for output voltage. Figure timing diagram which shows the ERROR signal and the regulated output voltage as the input voltage LP2950, LP2951, NCV2951 APPLICATIONS INFORMATION to the LP2951 is ramped up and down. The ERROR signal becomes valid (low) at about 1.3 V input. It goes high when the input reaches about 5 ...

Page 10

... In many applications it is desirable to reduce the noise present at the output. Reducing the regulator bandwidth by increasing the size of the output capacitor is the only method LP2950, LP2951, NCV2951 for reducing noise on the 3 lead LP2950. However, increasing the capacitor from 1 220 mF only decreases the noise from 430 mV to 160 mVrms for a 100 kHz bandwidth at the 5 ...

Page 11

... Error flag occurs when V is too in low to maintain re‐ out out duced by excessive load current. Figure 23. Latch Off When Error Flag Occurs LP2950, LP2951, NCV2951 TYPICAL APPLICATIONS 4.2 V ± 0.025 V Error Output 2.0 M 1.0% Shutdown Input 806 k Lithium Ion 1.0% Rechargeable ...

Page 12

... LP2950, LP2951, NCV2951 + Error out 2 SNS LP2951CN GND 2 2N3906 8 330 Error out 2 SNS LP2951CN GND Figure 25. Regulator with Early Warning and Auxiliary Output ...

Page 13

... LP2950, LP2951, NCV2951 0.1 mF 1N4001 Figure 27. Open Circuit Detector for 4 Current Loop 31.6 k 100 MC34164P-5 3 Figure 28. Low Battery Disconnect 100 Free Air 90 Mounted Vertically 80 Minimum 70 Size Pad 5.0 Figure 29. DPAK Thermal Resistance and Maximum Power Dissipation versus PCB Copper Length + 5 ...

Page 14

... LP2950ACZ-3.3RA LP2950ACZ-3.3RAG LP2950CZ-5.0 LP2950CZ-5.0G LP2950CZ-5.0RA LP2950CZ-5.0RAG LP2950CZ-5.0RP LP2950CZ-5.0RPG LP2950ACZ-5.0 LP2950ACZ-5.0G LP2950ACZ-5.0RA LP2950ACZ-5.0RAG LP2950CDT-3.0 LP2950CDT-3.0G LP2950CDT-3.0RK LP2950CDT-3.0RKG LP2950ACDT-3.0 LP2950ACDT-3.0G LP2950ACDT-3.0RK LP2950ACDT-3RKG LP2950CDT-3.3 LP2950, LP2951, NCV2951 (Volts) Tolerance (%) Package 3.0 1.0 3.0 1.0 (Pb-Free) 3.0 1.0 3.0 1.0 (Pb-Free) 3.0 0.5 3.0 0.5 (Pb-Free) 3.0 0.5 3 ...

Page 15

... LP2950ACDT-3.3RK LP2950CDT-5.0 LP2950CDT-5.0G LP2950CDT-5.0RK LP2950CDT-5.0RKG LP2950ACDT-5.0 LP2950ACDT-5.0G LP2950ACDT-5.0RK LP2950ACDT-5RKG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. LP2950, LP2951, NCV2951 (Volts) Tolerance (%) Package 3.3 1.0 (Pb-Free) 3.3 1.0 3.3 1.0 (Pb-Free) 3 ...

Page 16

... LP2951ACDG 5.0 or Adj. LP2951ACDR2 5.0 or Adj. LP2951ACDR2G 5.0 or Adj. LP2951CDM-3.0R2 LP2951CDM-3.0R2G LP2951ACDM-3.0R2 LP2951CDM-3.3R2 LP2951CDM-3.3R2G LP2951ACDM-3.3RG LP2951ACDM-3.3R2 LP2951CDMR2 5.0 or Adj. LP2951CDMR2G 5.0 or Adj. LP2951ACDMR2 5.0 or Adj. LP2951ACDMR2G 5.0 or Adj. LP2950, LP2951, NCV2951 (Volts) Tolerance (%) Package 3.0 1.0 SOIC-8 3.0 1.0 SOIC-8 (Pb-Free) 3.0 1.0 SOIC-8 3.0 1.0 SOIC-8 (Pb-Free) 3.0 0.5 SOIC-8 3 ...

Page 17

... LP2951ACN-3.3 LP2951ACN-3.3G LP2951CN LP2951CNG LP2951ACN LP2951ACNG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. ORDERING INFORMATION (NCV2951) Output Voltage Part Number NCV2951ACD-3.3R2* NCV2951ACD3.3R2G NCV2951ACDR2* NCV2951ACDR2G NCV2951CDR2* NCV2951CDR2G* † ...

Page 18

... ALYW 1 PDIP-8 N SUFFIX CASE 626 51CN 51ACN AWL AWL YYWWG YYWWG *This marking diagram also applies to NCV2951. LP2950, LP2951, NCV2951 MARKING DIAGRAMS DPAK DT SUFFIX CASE 369C 50-yG 50-yyG ALYWW ALYWW SOIC-8 D SUFFIX CASE 751 51z 51z-33 51z-3 ALYW ...

Page 19

... LP2950, LP2951, NCV2951 SEATING K PLANE PACKAGE DIMENSIONS TO-226AA/TO-92 Z SUFFIX PLASTIC PACKAGE CASE 29-11 ISSUE SECTION X-X http://onsemi.com 19 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM ...

Page 20

... 0.13 (0.005) M 5.80 0.228 *For additional information on our Pb-Free strategy and soldering details please download the ON Semiconductor Soldering and Mozunting Techniques Reference Manual, SOLDERRM/D. LP2950, LP2951, NCV2951 PACKAGE DIMENSIONS DPAK DT SUFFIX PLASTIC PACKAGE CASE 369C-01 ISSUE O SEATING -T- PLANE SOLDERING FOOTPRINT* 6 ...

Page 21

... PLANE - 0.25 (0.010 *For additional information on our Pb-Free strategy and soldering details please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. LP2950, LP2951, NCV2951 PACKAGE DIMENSIONS SOIC-8 D SUFFIX PLASTIC PACKAGE CASE 751-07 ISSUE ...

Page 22

... F -A- NOTE 2 C -T- N SEATING PLANE 0.13 (0.005) M LP2950, LP2951, NCV2951 PACKAGE DIMENSIONS PDIP-8 N SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE http://onsemi.com 22 NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS) ...

Page 23

... SEATING -T- PLANE A 0.038 (0.0015) A1 *For additional information on our Pb-Free strategy and soldering details please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. LP2950, LP2951, NCV2951 PACKAGE DIMENSIONS E Micro8 DM SUFFIX PLASTIC PACKAGE CASE 846A-02 ISSUE G NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. ...

Page 24

... Box 5163, Denver, Colorado 80217 USA  Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada  Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada  Email: orderlit@onsemi.com LP2950, LP2951, NCV2951 N. American Technical Support: 800-282-9855 Toll Free  USA/Canada Europe, Middle East and Africa Technical Support:  Phone: 421 33 790 2910 Japan Customer Focus Center   ...

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