Linear Regulator. LP5952 Datasheet

LP5952 Regulator. Datasheet pdf. Equivalent

Part LP5952
Description Dual-Rail Linear Regulator
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LP5952
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LP5952
SNVS469F – OCTOBER 2006 – REVISED DECEMBER 2015
LP5952 350-mA Dual-Rail Linear Regulator
1 Features
1 Input Voltage Range: 0.7 V to 4.5 V
• 2.5 V VBATT 5.5 V
• 0.5V VOUT 2 V
• Ensured 350-mA Output Current
• For ILOAD = 350 mA:
– VBATT VOUT(NOM) + 1.5 V or 2.5 V
(Whichever is Higher)
• For ILOAD = 150 mA:
– VBATT VOUT(NOM) + 1.3 V or 2.5 V
(Whichever is Higher)
• Excellent Load Transient Response: ±15 mV
Typical
• Excellent Line Transient Response: ±1 mV Typical
• 50-µA Typical Quiescent Current from VBATT
• 10-µA Typical Quiescent Current from VIN
• 0.1-µA Typical Quiescent Current in Shutdown
• Noise voltage = 100 µVRMS Typical
• Operates from a Single Li-Ion Cell or 3-Cell
NiMH/NiCd Battery
• Thermal-Overload and Short-Circuit Protection
2 Applications
• Mobile Phones
• Hand-Held Radios
• Personal Digital Assistants
• Palm-Top PCs
• Portable Instruments
• Battery-Powered Devices
3 Description
The LP5952 is a dual-supply-rail linear regulator
optimized for powering ultralow-voltage circuits from a
single Li-Ion cell or 3-cell NiMH/NiCd battery.
In the typical post-regulation application VBATT is
directly connected to the battery (range 2.5 V to
5.5 V), and VIN is supplied by the output voltage of
the DC-DC converter (range 0.7 V to 4.5 V).
The device offers superior dropout and transient
features combined with very low quiescent currents.
In shutdown mode (Enable (EN) pin pulled low) the
device turns off and reduces battery consumption to
0.1 µA (typical). The LP5952 also features internal
protection against overtemperature, overcurrent, and
undervoltage conditions.
Depending upon application, only one or two tiny
surface-mount external components are required;
performance is specified for a –40°C to +125°C
junction temperature range. The device is available in
fixed output voltages from 0.5 V to 2 V. For
availability, please contact your local Texas
Instruments sales office.
PART NUMBER
LP5952
Device Information(1)
PACKAGE
BODY SIZE (NOM)
DSBGA (5)
1.326 mm × 0.96 mm
USON (6)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
Li-Ion
or
3-cell
NiMh/NiCd
VBATT: 2.7 V to 5.5 V
Pre-
regulator
For example,
1.5 V
BATT
C1
OUT
A3
LP5952
2.2 PF
IN A1
1 PF
EN
C3
B2 GND
For example, 1.2 V
Load
0 to 350 mA
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



LP5952
LP5952
SNVS469F – OCTOBER 2006 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information ................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Electrical Characteristics: Quiescent Currents.......... 6
6.7 Electrical Characteristics: Shutdown Currents.......... 6
6.8 Electrical Characteristics: Enable Control................. 6
6.9 Electrical Characteristics: Thermal Protection .......... 7
6.10 Electrical Characteristics: Transient
Characteristics ........................................................... 7
6.11 Input and Output Capacitors (Recommended) ....... 7
6.12 Typical Characteristics ............................................ 8
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 11
8 Application and Implementation ........................ 12
8.1 Application Information............................................ 12
8.2 Typical Application ................................................. 12
9 Power Supply Recommendations...................... 17
10 Layout................................................................... 18
10.1 Layout Guidelines ................................................. 18
10.2 Layout Examples................................................... 18
11 Device and Documentation Support ................. 19
11.1 Device Support .................................................... 19
11.2 Documentation Support ....................................... 19
11.3 Community Resources.......................................... 19
11.4 Trademarks ........................................................... 19
11.5 Electrostatic Discharge Caution ............................ 19
11.6 Glossary ................................................................ 19
12 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (May 2013) to Revision F
Page
• Added Device Information and Pin Configuration and Functions sections, ESD Ratings and Thermal Information
tables, Feature Description, Device Functional Modes, Application and Implementation, Power Supply
Recommendations, Layout, Device and Documentation Support, and Mechanical, Packaging, and Orderable
Information sections; update pin names to TI nomenclature.................................................................................................. 1
• Deleted lead temp spec - it is in POA ................................................................................................................................... 4
• Updated thermal information ................................................................................................................................................. 5
• Changed values for thermal specifications in Power Dissipation section per updated thermal information ....................... 14
Changes from Revision D (April 2013) to Revision E
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 18
2
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