LP3964ES-3.3 National Semiconductor, LP3964ES-3.3 Datasheet

V REG ULTRA-LDO +3.3V, SMD, 3964

LP3964ES-3.3

Manufacturer Part Number
LP3964ES-3.3
Description
V REG ULTRA-LDO +3.3V, SMD, 3964
Manufacturer
National Semiconductor
Datasheet

Specifications of LP3964ES-3.3

Primary Input Voltage
4.3V
Output Voltage
3.3V
Dropout Voltage Vdo
240mV
No. Of Pins
5
Output Current
800mA
Voltage Regulator Case Style
TO-263
Operating Temperature Range
-40°C To +125°C
Output Voltage Fixed
3.3V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
© 2005 National Semiconductor Corporation
LP3961/LP3964
800mA Fast Ultra Low Dropout Linear Regulators
General Description
The LP3961/LP3964 series of fast ultra low-dropout linear
regulators operate from a +2.5V to +7.0V input supply. Wide
range of preset output voltage options are available. These
ultra low dropout linear regulators respond very fast to step
changes in load which makes them suitable for low voltage
microprocessor applications. The LP3961/LP3964 are de-
veloped on a CMOS process which allows low quiescent
current operation independent of output load current. This
CMOS process also allows the LP3961/LP3964 to operate
under extremely low dropout conditions.
Dropout Voltage: Ultra low dropout voltage; typically 24mV
at 80mA load current and 240mV at 800mA load current.
Ground Pin Current: Typically 4mA at 800mA load current.
Shutdown Mode: Typically 15µA quiescent current when
the shutdown pin is pulled low.
Error Flag: Error flag goes low when the output voltage
drops 10% below nominal value (for LP3961).
SENSE: Sense pin improves regulation at remote loads.
(For LP3964)
Precision Output Voltage: Multiple output voltage options
are available ranging from 1.2V to 5.0V and adjustable
(LP3964), with a guaranteed accuracy of
temperature, and
load, and temperature).
Typical Application Circuits
*SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications
section for more information.
** See Application Hints.
±
3.0% over all conditions (varying line,
DS101129
±
1.5% at room
Features
n Ultra low dropout voltage
n Low ground pin current
n Load regulation of 0.02%
n 15µA quiescent current in shutdown mode
n Guaranteed output current of 0.8A DC
n Available in SOT-223,TO-263 and TO-220 packages
n Output voltage accuracy
n Error flag indicates output status (LP3961)
n Sense option improves better load regulation (LP3964)
n Extremely low output capacitor requirements
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
Applications
n Microprocessor power supplies
n GTL, GTL+, BTL, and SSTL bus terminators
n Power supplies for DSPs
n SCSI terminator
n Post regulators
n High efficiency linear regulators
n Battery chargers
n Other battery powered applications
±
1.5%
www.national.com
July 2005
10112901

Related parts for LP3964ES-3.3

LP3964ES-3.3 Summary of contents

Page 1

... ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications section for more information. ** See Application Hints. © 2005 National Semiconductor Corporation Features n Ultra low dropout voltage n Low ground pin current n Load regulation of 0.02% n 15µ ...

Page 2

Typical Application Circuits *SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications section for more information. ** See Application Hints Block Diagram ...

Page 3

Block Diagram LP3964 Block Diagram LP3964-ADJ 10112929 10112930 3 www.national.com ...

Page 4

Connection Diagrams 10112904 Top View SOT 223-5 Package Pin Description for SOT223-5 Package Pin # Name OUT 4 ERROR 5 GND Pin # Name GND 4 V ...

Page 5

... Reel LP3961ES-5.0 Rail LP3961ESX-5.0 Tape and Reel LP3961ES-3.3 Rail LP3961ES-3.3 Tape and Reel LP3961ES-2.5 Rail LP3961ES-2.5 Tape and Reel LP3961ES-1.8 Rail LP3961ES-1.8 Tape and Reel LP3964ES-5.0 Rail LP3964ES-5.0 Tape and Reel LP3964ES-3.3 Rail LP3964ES-3.3 Tape and Reel LP3964ES-2.5 Rail www.national.com ...

Page 6

... SENSE TO220-5 800mA, SENSE TO220-5 800mA, SENSE TO220-5 800mA, SENSE TO220-5 800mA, ADJ TO220-5 6 Package Marking Supplied As: LP3964ES-2.5 Tape and Reel LP3964ES-1.8 Rail LP3964ES-1.8 Tape and Reel LP3964ES-ADJ Rail LP3964ES-ADJ Tape and Reel LP3961ET-5.0 Rail LP3961ET-3.3 Rail LP3961ET-2.5 Rail LP3961ET-1.8 Rail LP3964ET-5 ...

Page 7

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Lead Temperature (Soldering, 5 sec.) ESD Rating (Note 3) Power Dissipation (Note 2) Input Supply Voltage (Survival) Shutdown Input Voltage (Survival) ...

Page 8

Electrical Characteristics LP3961/LP3964 (Continued) Limits in standard typeface are for T Unless otherwise specified Symbol Parameter T Turn-off delay dOFF T Turn-on delay dON I SD Input Current SD ERROR FLAG COMPARATOR V Threshold T V ...

Page 9

Typical Performance Characteristics C = 33µ 10mA 68µF, V OUT OUT IN Drop-Out Voltage Vs Temperature for Different Load Currents Ground Pin Current Vs Input Voltage (V Ground Current Vs Temperature (V Unless otherwise specified, V ...

Page 10

Typical Performance Characteristics C = 33µ 10mA 68µF, V OUT OUT IN Ground Pin Current Vs Shutdown Pin Voltage Output Noise Density, V Load Transient Response www.national.com Unless otherwise specified and T ...

Page 11

Typical Performance Characteristics C = 33µ 10mA 68µF, V OUT OUT IN δV vs Temperature OUT Line Transient Response Line Transient Response (I OUT Unless otherwise specified and T = 25˚C. (Continued) ...

Page 12

Application Hints EXTERNAL CAPACITORS Like any low-dropout regulator, external capacitors are re- quired to assure stability. these capacitors must be correctly selected for proper performance. INPUT CAPACITOR: The LP3961/4 requires a low source impedance to maintain regulator stability because the ...

Page 13

Application Hints (Continued) the LP396X. Derating must be applied to the manufacturer’s ESR specification, since it is typically only valid at room temperature. Any applications using aluminum electrolytics should be thoroughly tested at the lowest ambient operating tempera- ture where ...

Page 14

Application Hints (Continued) ERROR FLAG OPERATION The LP3961/LP3964 produces a logic low signal at the Error Flag pin when the output drops out of regulation due to low input voltage, current limiting, or thermal limiting. This flag has a built ...

Page 15

Application Hints (Continued) FIGURE 2. Improving remote load regulation using LP3964 SHUTDOWN OPERATION A CMOS Logic level signal at the shutdown ( SD) pin will turn-off the regulator. Pin SD must be actively terminated through a 10kΩ pull-up resistor for ...

Page 16

Application Hints (Continued) HEATSINKING TO-263 AND SOT-223 PACKAGES The TO-263 and SOT223 packages use the copper plane on the PCB as a heatsink. The tab of these packages are soldered to the copper plane for heat sinking. Figure 3 shows ...

Page 17

Application Hints (Continued) FIGURE 8. SCENARIO C, θ JA FIGURE 9. SCENARIO D, θ JA 10112922 = 92˚C/W FIGURE 10. SCENARIO E, θ 10112923 = 83˚C/W FIGURE 11. SCENARIO F, θ 17 10112924 = 77˚C/W JA 10112925 = 75˚C/W JA ...

Page 18

FIGURE 12. SCENARIO G, θ = 113˚C/W JA 10112927 FIGURE 13. SCENARIO H, θ = 79˚C ...

Page 19

Application Hints (Continued) 10112928 FIGURE 14. SCENARIO I, θ = 78.5˚C www.national.com ...

Page 20

Physical Dimensions unless otherwise noted TO220 5-lead, Molded, Stagger Bend Package (TO220-5) For Order Numbers, refer to the “Ordering Information” section of this document. www.national.com inches (millimeters) NS Package Number T05D 20 ...

Page 21

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) TO263 5-Lead, Molded, Surface Mount Package (TO263-5) For Order Numbers, refer to the “Ordering Information” section of this document. NS Package Number TS5B 21 www.national.com ...

Page 22

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

Related keywords