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LP2950 PDF даташит

Спецификация LP2950 изготовлена ​​​​«Calogic LLC» и имеет функцию, называемую «100mA Low Dropout Voltage Regulators».

Детали детали

Номер произв LP2950
Описание 100mA Low Dropout Voltage Regulators
Производители Calogic LLC
логотип Calogic  LLC логотип 

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LP2950 Даташит, Описание, Даташиты
CORPORATION
100mA Low Dropout
Voltage Regulators
LP2950 / LP2951
FEATURES
5V, 3.3V, and 3.0V Versions at 100mA Output
Very Low Quiescent Current
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
•• Needs Only 1µF for Stability
LP2951 Versions Only
Error Flag Warns of Output Dropout
Logic-Controlled Electronic Shutdown
•• Output Programmable from 1.24 to 29V
APPLICATIONS
Battery Powered Systems
Cordless Telephones
Radio Control Systems
Portable / Palm Top / Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Avionics
SMPS Post-Regulator
Voltage Reference
•• Automotive Electronics
PIN CONNECTIONS
8-PIN SURFACE MOUNT
OUTPUT 1
SENSE 2
SHUTDOWN 3
GROUND 4
LP2951
8 INPUT
7 FEEDBACK
6 5V OR 3.3V TAP
5 ERROR
TOP VIEW
1D-19
PRODUCT DESCRIPTION
The Calogic LP2950 and LP2951 are low power voltage
regulators. These devices are an excellent choice for use in
battery-powered applications such as cordless telephones,
radio control systems, and portable computers. The LP2950
and LP2951 features very low quiescent current and very low
dropout voltage (Typ. 50mV at light load and 380mV at 100mA).
This includes a tight initial tolerance of 0.5% typ., extremely
good load and line regulation 0.05% typ. and very low output
temperature coefficient, making the LP2950/LP2951 useful
as a low-power voltage reference.
The error flag output feature is used as power-on reset for
warning of a low output voltage, due to falling voltage input of
batteries. Another feature is the logic-compatible shutdown
input which enables the regulator to be switched on and off.
The LP2950 is offered in a 3-pin TO-92 package compatible
with other 5V, 3.0V, 3.3V regulators. The LP2951 is also available
in 8-pin plastic and SO-8.
The regulator output voltage may be pin-strapped for 5V, 3V
or 3.3 volts or programmed from 1.24 volt to 29 volts with an
external pair of resistors. Use of AS’s design, processing and
testing techniques make our LP2950 and LP2951 superior
over similar products.
ORDERING INFORMATION
PART
PACKAGE TEMPERATURE RANGE
LP2950ACN-X
LP2950CN-X
LP2951ACP-X
LP2951CP-X
LP2951ACS-X
LP2951CS-X
TO-92 (3-Pin)
TO-92 (3-Pin)
Plastic DIP (8-Pin)
Plastic DIP (8-Pin)
Plastic SOIC (8-Pin)
Plastic SOIC (8-Pin)
X = 3.0V, 3.3V or 5.0V
IND.
IND.
IND.
IND.
IND.
IND.
TO-92
123
1. OUTPUT
2. GROUND
3. INPUT
BOTTOM VIEW
1D-20
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025









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LP2950 Даташит, Описание, Даташиты
LP2950 / LP2951
CORPORATION
ABSOLUTE MAXIMUM RATINGS
Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited
Lead Temp. (Soldering, 5 Seconds) . . . . . . . . . . . . . . . 260oC
Storage Temperature Range . . . . . . . . . . . . . . . -65 to +150oC
Operating Junction Temperature Range
LP2951. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150oC
LP2950AC/LP2950C
LP2951AC/LP2951C . . . . . . . . . . . . . . . . . . . -40 to +125oC
Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30V
Feedback Input Voltage . . . . . . . . . . . . . . . . . . . . -1.5 to +30V
Shutdown Input Voltage. . . . . . . . . . . . . . . . . . . . -0.3 to +30V
Error Comparator Output . . . . . . . . . . . . . . . . . . . -0.3 to +30V
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2KV Min
ELECTRICAL CHARACTERISTICS: VS = 15V, TA = 25oC, unless otherwise specified.
PARAMETER
3V VERSIONS
Output Voltage
LP2951
LP2950AC / LP2951AC LP2950C / LP2951C
MIN TYP MAX MIN TYP MAX MIN TYP MAX
2.985 3.0 3.015 2.985 3.0 3.015 2.970 3.0 3.030
2.970 3.0 3.030 2.955 3.0 3.045
2.964
3.036 2.964 3.0 3.036 2.940 3.0 3.060
Output Voltage
2.955 3.0 3.045 2.958 3.0 3.042 2.928 3.0 3.072
3.3V VERSIONS
Output Voltage
3.284 3.3 3.317 3.284 3.3 3.317 3.267 3.3 3.333
3.267 3.3 3.333 3.251 3.3 3.350
3.260
3.340 3.260 3.3 3.340 3.234 3.3 3.366
Output Voltage
3.251 3.3 3.350 3.254 3.3 3.346 3.221 3.3 3.379
5V VERSIONS
Output Voltage
4.975 5.0 5.025 4.975 5.0 5.025 4.95 5.0 5.05
4.95 5.0 5.050 4.925 5.0 5.075
4.94 5.06 4.94 5.0 5.06 4.90 5.0 5.10
Output Voltage
4.925 5.0 5.075 4.93 5.0 5.07 4.88 5.0 5.12
ALL VOLTAGE OPTIONS
Output Voltage
Temperature Coefficient
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage
(Note 5)
Ground Current
Current Limit
Thermal Regulation
Output Noise,
10Hz to 100KHz
20
0.03
0.04
50
380
150
8
130
0.05
430
160
100
120
0.1
0.1
80
450
170
12
200
0.2
20
0.03
0.04
50
380
150
8
130
0.05
430
160
100
0.1
0.1
80
450
170
12
200
0.2
50
0.04 0.2
0.1 0.2
50 80
380 450
150 170
8 12
130 200
0.05 0.2
430
160
100
8-PIN VERSIONS ONLY
Reference Voltage
Reference Voltage
Feedback Pin Bias Current
Reference Voltage
Temperature Coefficient
Feedback Pin Bias Current
Temperature Coefficient
LP2951
1.22 1.235 1.25
1.19 1.27
40 60
20
0.1
LP2951AC
1.22 1.235 1.25
1.19 1.27
40 60
LP2951C
1.21 1.235 1.26
1.185
1.285
40 60
20 50
0.1 0.1
UNITS
V
V
V
V
V
V
V
V
V
V
V
V
ppm/oC
%
%
mV
mV
µA
mA
mA
%/W
µVrms
µVrms
µVrms
V
V
nA
ppm/oC
nA/oC
CONDITIONS
(Note 2)
TJ = 25oC
-25oC TJ 85oC
Full Operating Temperature
100µA IL 100mA
TJ TJMAX
TJ = 25oC
-25oC TJ 85oC
Full Operating Temperature
100µA IL 100mA
TJ TJMAX
TJ = 25oC
-25oC TJ 85oC
Full Operating Temperature
100µA IL 100mA
TJ TJMAX
(Note 1)
6V VIN 30V (Note 4)
100µA IL 100mA
IL = 100µA
IL = 100mA
IL = 100µA
IL = 100mA
VOUT = 0
CL = 1µF
CL = 200µF
CL = 13.3µF
(Bypass = 0.01µF pins 7 to 1 (LP2951))
Over Temperature (Note 6)
(Note 7)
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025









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LP2950 Даташит, Описание, Даташиты
CORPORATION
LP2950 / LP2951
ELECTRICAL CHARACTERISTICS (continued)
PARAMETER
ERROR COMPARATOR
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
SHUTDOWN INPUT
Input Logic Voltage
Shutdown Pin
Input Current
Regulator Output Current
in Shutdown
LP2951
LP2950AC / LP2951AC LP2950C / LP2951C
UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
CONDITIONS
(Note 2)
0.01 1
0.01 1
0.01 1
150 250
150 250
150 250
40 60
40 60
40 60
75 95
75 95
75 95
15 15 15
µA VOH = 30V
mV VIN = 4.5V, IOL = 400µA
mV (Note 7)
mV (Note 7)
mV (Note 7)
1.3 0.6
1.3 0.7
1.3 0.7
22 2
V Low (Regulator ON)
V High (Regulator OFF)
30 50
675 800
30 50
675 800
30 50
675 800
µA VS = 2.4V
µA VS = 30V
3 10
3 10
3 10
µA (Note 9)
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.
Note 2: Unless otherwise specified all limits guaranteed for TJ = 25oC, VIN = 6V, IL=100µA and CL = 1µF. Additional conditions for the 8-pin
versions are feedback tied to 5V tap and output tied to output Sense (VOUT = 5V) and VSHUTDOWN 0.8V.
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
Note 4: Line regulation for the LP2951 is tested at 150oC for IL = 1mA. For IL = 100µA and TJ = 125oC, line regulation is guaranteed by design to
0.2%. See typical performance characteristics for line regulation versus temperature and load current.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured
at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be
taken input account.
Note 6: VREF VOUT (VIN - 1V), 2.3 VIN 30V, 100µA IL 100mA, TJ TJMAX.
Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage
measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT/VREF =
(R1+R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x
5V/1.235 = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below
nominal, 7.5% guaranteed.
Note 8: VSHUTDOWN 2V, VIN 30V, VOUT = 0, Feedback pin tied to 5V Tap.
Note 9: All typical values are not guaranteed.
BLOCK DIAGRAM
UNREGULATED DC
+
7
FEEDBACK
8
INPUT
1
OUTPUT
FROM
CMOS
OR TTL
3
SHUTDOWN
+
60mV
+
+ 1.23V
+
REFERENCE
LP2950 AND LP2951 BLOCK DIAGRAM
ERROR
AMPLIFIER
180k
60k
ERROR DETECTION
COMPARATOR
2
SENSE
6
5V TAP
5
ERROR
4
GROUND
5V @ 100mA
MAX
+
1µF
330k
TO CMOS OR
TTL
1D-21
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025










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