Voltage Regulator. LP4951C Datasheet

LP4951C Regulator. Datasheet pdf. Equivalent

Part LP4951C
Description Adjustable Micropower Voltage Regulator
Feature LP4950C-5V, LP4951C www.ti.com SNVS208C – SEPTEMBER 2002 – REVISED APRIL 2013 LP4950C-5V and LP49.
Manufacture etcTI
Datasheet
Download LP4951C Datasheet

LP4950C-5V and LP4951C Adjustable Micropower Voltage Regulat LP4951C Datasheet
LP4950C-5V, LP4951C www.ti.com SNVS208C – SEPTEMBER 2002 – LP4951C Datasheet
Recommendation Recommendation Datasheet LP4951C Datasheet





LP4951C
LP4950C-5V, LP4951C
www.ti.com
SNVS208C – SEPTEMBER 2002 – REVISED APRIL 2013
LP4950C-5V and LP4951C Adjustable Micropower Voltage Regulators
Check for Samples: LP4950C-5V, LP4951C
FEATURES
1
2 High Accuracy 5V Specified 100mA Output
• Extremely Low Quiescent Current
• Low Dropout Voltage
• Extremely Tight Load and Line Regulation
• Very Low Temperature Coefficient
• Use as Regulator or Reference
• Needs Only 1μF for Stability
• Current and Thermal Limiting
.
LP4951C VERSIONS ONLY
• Error Flag Warns of Output Dropout
• Logic-controlled Electronic Shutdown
• Output Pogrammable From 1.24 to 29V
DESCRIPTION
The LP4950C and LP4951C are micropower voltage
regulators with very low quiescent current (75μA typ.)
and very low dropout voltage (typ. 40mV at light loads
and 380mV at 100mA). They are ideally suited for
use in battery-powered systems. Furthermore, the
quiescent current of the LP4950C/LP4951C
increases only slightly in dropout, prolonging battery
life.
The LP4950C in the popular 3-pin TO-92 package is
pin compatible with older 5V regulators. The 8-lead
LP4951C is available in a plastic surface mount
package and offers additional system functions.
One such feature is an error flag output which warns
of a low output voltage, often due to falling batteries
on the input. It may be used for a power-on reset. A
second feature is the logic-compatible shutdown input
which enables the regulator to be switched on and
off. Also, the part may be pin-strapped for a 5V
output or programmed from 1.24V to 29V with an
external pair of resistors.
Careful design of the LP4950C/LP4951C has
minimized all contributions to the error budget. This
includes a tight initial tolerance (.5% typ.), extremely
good load and line regulation (.05% typ.) and a very
low output voltage temperature coefficient, making
the part useful as a low-power voltage reference.
BLOCK DIAGRAM AND TYPICAL APPLICATIONS
LP4950C
LP4951C
Figure 1.
Figure 2.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2002–2013, Texas Instruments Incorporated



LP4951C
LP4950C-5V, LP4951C
SNVS208C – SEPTEMBER 2002 – REVISED APRIL 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS (1)
Input Supply Voltage
SHUTDOWN Input Voltage,
Error Comparator Output
Voltage, (2)
FEEDBACK Input Voltage (2) (3)
Power Dissipation
Junction Temperature (TJ)
Ambient Storage Temperature
ESD Rating
Human Body Model (4)
For soldering specifications, see the following document: www.ti.com/lit/snoa549
0.3 to +30V
0.3 to +30V
1.5 to +30V
Internally Limited
+150°C
65° to +150°C
2 kV
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits and
associated test conditions, see the Electrical Characteristics tables.
(2) May exceed input supply voltage.
(3) When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be
diode-clamped to ground.
(4) Human Body Model 1.5 kin series with 100 pF. LP4950 - passes 2 kV HBM. LP4951 - All pins pass 2 kV except Vfb -1000V.
OPERATING RATINGS (1)
Maximum Input Supply Voltage
Junction Temperature Range(2)
LP4950C, LP4951C
30V
40°C to 125°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits and
associated test conditions, see the Electrical Characteristics tables.
(2) The junction-to-ambient thermal resistances are as follows: 180°C/W and 160°C/W for the TO-92 package with 0.40 inch and 0.25 inch
leads to the printed circuit board (PCB) respectively, 160°C/W for the molded plastic SOIC (D). The above thermal resistances for the
SOIC package apply when the package is soldered directly to the PCB.
2
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Copyright © 2002–2013, Texas Instruments Incorporated
Product Folder Links: LP4950C-5V LP4951C





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