LP3872EMP-3.3/NOPB National Semiconductor, LP3872EMP-3.3/NOPB Datasheet
LP3872EMP-3.3/NOPB
Specifications of LP3872EMP-3.3/NOPB
LP3872EMP-3.3TR
Related parts for LP3872EMP-3.3/NOPB
LP3872EMP-3.3/NOPB Summary of contents
Page 1
... 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 application hints for more information. © 2006 National Semiconductor Corporation Features n Ultra low dropout voltage n Low ground pin current n Load regulation of 0 ...
Page 2
Typical Application Circuits *SD must be pulled high through a 10kΩ pull-up resistor. See application hints for more information. Connection Diagrams Top View TO220-5 Package Bent, Staggered Leads 20063386 Top View SOT223-5 Package www.national.com (Continued) 20063305 TO263-5 Package 2 20063345 ...
Page 3
Pin Descriptions for TO220-5 and TO263-5 Packages Pin # Name GND 4 V OUT 5 ERROR Pin Descriptions for SOT223-5 Package Pin # Name OUT 4 ERROR ...
Page 4
... LP3872EMPX-3.3 1.5A, Error Flag 3.3 LP3872ES-3.3 1.5A, Error Flag 3.3 LP3872ESX-3.3 1.5A, Error Flag 2.5 LP3872EMP-2.5 1.5A, Error Flag 2.5 LP3872EMPX-2.5 1.5A, Error Flag 2.5 LP3872ES-2.5 1.5A, Error Flag 2.5 LP3872ESX-2.5 1.5A, Error Flag 1.8 LP3872ES-1.8 1.5A, Error Flag 1.8 LP3872ESX-1.8 1 ...
Page 5
Ordering Information (Continued) TABLE 1. Package Marking and Ordering Information (Continued) Output Order Number Voltage (Current, Option) 3.3 LP3875EMPX-3.3 1.5A, SENSE 3.3 LP3875ES-3.3 1.5A, SENSE 3.3 LP3875ESX-3.3 1.5A, SENSE 2.5 LP3875EMP-2.5 1.5A, SENSE 2.5 LP3875EMPX-2.5 1.5A, SENSE 2.5 LP3875ES-2.5 1.5A, ...
Page 6
Block Diagrams www.national.com LP3872 20063303 LP3875 20063329 6 ...
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 LP3872/LP3875 (Continued) Limits in standard typeface are for T Unless otherwise specified Symbol Parameter Shutdown Input V Shutdown Threshold SDT T Turn-off delay dOFF T Turn-on delay dON I SD Input Current SD Error ...
Page 9
Typical Performance Characteristics C = 10µF, S/D pin is tied OUT Dropout Voltage vs Output Load Current Shutdown I vs Junction Temperature Q DC Load Reg. vs Junction Temperature Unless otherwise specified ...
Page 10
Typical Performance Characteristics C = 10µF, S/D pin is tied Noise vs Frequency Load Transient Response 100µF, OSCON IN OUT Load Transient Response 10µF, TANTALUM IN OUT www.national.com ...
Page 11
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: An input capacitor of at least 10µF is required. Ceramic Ceramic, Tantalum, or ...
Page 12
Application Hints (Continued) PCB LAYOUT Good PC layout practices must be used or instability can be induced because of ground loops and voltage drops. The input and output capacitors must be directly connected to the input, output, and ground pins ...
Page 13
Application Hints (Continued) SENSE PIN In applications where the regulator output is not very close to the load, LP3875 can provide better remote load regulation using the SENSE pin. Figure 2 depicts the advantage of the SENSE option. LP3872 regulates ...
Page 14
Application Hints (Continued) DROPOUT VOLTAGE The dropout voltage of a regulator is defined as the minimum input-to-output differential required to stay within 2% of the nominal output voltage. For CMOS LDOs, the dropout volt- age is the product of the ...
Page 15
Application Hints (Continued) FIGURE 5. θ vs Copper(1 Ounce) Area for SOT-223 JA package The following figures show different layout scenarios for SOT-223 package. FIGURE 6. SCENARIO A, θ 20063387 FIGURE 7. SCENARIO B, θ 15 20063388 = 148˚C/W JA ...
Page 16
Physical Dimensions 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) unless otherwise noted NS Package Number T05D 16 ...
Page 17
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 17 www.national.com ...
Page 18
... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...