LP38513S-1.8EV National Semiconductor, LP38513S-1.8EV Datasheet

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LP38513S-1.8EV

Manufacturer Part Number
LP38513S-1.8EV
Description
BOARD EVAL LP38513 1.8V
Manufacturer
National Semiconductor
Datasheets

Specifications of LP38513S-1.8EV

Channels Per Ic
1 - Single
Voltage - Output
1.8V
Current - Output
3A
Voltage - Input
2.25 ~ 5.5V
Regulator Type
Positive Fixed
Operating Temperature
-40°C ~ 125°C
Board Type
Fully Populated
Utilized Ic / Part
LP38513
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
© 2009 National Semiconductor Corporation
3A Fast Response Ultra Low Dropout Linear Regulator
General Description
The LP38513 fast response ultra low dropout linear regulator
operates from a +2.25V to +5.50V input supply. This ultra low
dropout linear regulator responds very quickly to step
changes in line or load conditions, which makes it suitable for
low voltage microprocessor applications. Developed on a
CMOS process, with a PMOS pass transistor, the LP38513
has low quiescent current operation that is independent of the
output load current.
Ground Pin Current: Typically 12 mA at 3A load current.
Disable Mode: Typically 60 µA quiescent current when the
Enable pin is pulled low.
ERROR Flag: The ERROR Flag goes low if V
than typically 15% below the nominal value.
Precision Output Voltage: A guaranteed V
±2.6% with T
Typical Application Circuit
J
from 0°C to 125°C.
201468
OUT
OUT
accuracy of
falls more
LP38513-1.8
Features
Applications
Conversions from 2.5V rail to 1.8V
Stable with ceramic capacitors
Low ground pin current
Load regulation of 0.1% for 10 mA to 3A load current
60 μA typical quiescent current in shutdown mode
Guaranteed output current of 3A
Available in TO220-5 and TO263-5 packages
Guaranteed V
+125°C
ERROR flag indicates V
Over-Temperature and Over-Current protection
−40°C to +125°C operating T
Microprocessor power supplies
GTL, GTL+, BTL, and SSTL bus terminators
Power supplies for DSPs
SCSI terminator
Post regulators
Battery chargers
Other battery powered applications
OUT
accuracy of ±2.6% with T
OUT
status
J
range
20146801
March 9, 2009
www.national.com
J
from 0°C to

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LP38513S-1.8EV Summary of contents

Page 1

... ERROR Flag: The ERROR Flag goes low if V than typically 15% below the nominal value. Precision Output Voltage: A guaranteed V ±2.6% with T from 0°C to 125°C. J Typical Application Circuit © 2009 National Semiconductor Corporation LP38513-1.8 Features ■ Conversions from 2.5V rail to 1.8V ■ Stable with ceramic capacitors ■ ...

Page 2

... The TO220 and TO263 TAB is used as a thermal connection to remove heat from the device to an external heatsink. The TAB is internally connected to device pin 3. 2 Package Marking Supplied As: LP38513S-1.8 Rail LP38513S-1.8 Tape and Reel LP38513T-1.8 Rail 20146804 Top View TO-263 5 Pin Package ...

Page 3

... 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 Soldering Temperature (Note 3) TO-220, Wave TO-263 ESD Rating (Note 2) Power Dissipation (Note 4) Input Pin Voltage (Survival) Enable Pin Voltage (Survival) ...

Page 4

Symbol Parameter ERROR Flag ERROR Flag Threshold V TH (Note 9) ERROR Flag Threshold ΔV Hysteresis TH (Note 9) ERROR Flag Saturation V ERROR(SAT) Voltage ERROR Flag Pin Leakage I lk Current t ERROR Flag Delay time d AC Parameters ...

Page 5

Typical Performance Characteristics µ µ mA. IN OUT OUT V vs Temperature OUT Ground Pin Current (I GND Ground Pin Current Temperature GND Unless otherwise specified: T 20146811 ) ...

Page 6

OUT ERROR Flag Low vs Temperature Load regulation vs Temperature www.national.com V EN OUT 20146832 20146818 20146820 6 ERROR Flag Threshold vs Temperature 20146817 ERROR Flag Leakage vs Temperature 20146819 Line Regulation vs Temperature 20146821 ...

Page 7

Current Limit vs Temperature Load Transient 3A μF Ceramic + 100 μF Aluminum C OUT Load Transient μF Ceramic + 100 μF Aluminum C OUT Load Transient 10mA to 3A, ...

Page 8

PSRR www.national.com 20146829 8 Noise 20146831 ...

Page 9

Block Diagram Application Information 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: A ceramic input capacitor of at least 10 µF is required. ...

Page 10

Please refer to the POW- ER DISSIPATION/HEAT-SINKING section for power dissi- pation calculations. ENABLE OPERATION The Enable On/Off threshold is typically 850 mV, and has no hysteresis. The voltage signal must rise and fall ...

Page 11

FIGURE 2. ERROR Flag Operation, biased from V POWER DISSIPATION/HEAT-SINKING A heat-sink may be required depending on the maximum power dissipation (P ), maximum ambient temperature D(MAX) (T )of the application, and the thermal resistance (θ A(MAX) the package. Under ...

Page 12

FIGURE 3. θ vs Copper (1 Ounce) Area for the TO-263 JA package As shown in the figure, increasing the copper area beyond 1 square inch produces very little improvement. The minimum value for θ for the TO-263 package mounted ...

Page 13

Physical Dimensions inches (millimeters) unless otherwise noted TO263 5-Lead, Molded, Surface Mount Package TO220 5-lead, Molded, Stagger Bend Package NS Package Number T05D NS Package Number TS5B 13 www.national.com ...

Page 14

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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