LP38511-1.8 NSC [National Semiconductor], LP38511-1.8 Datasheet
LP38511-1.8
Related parts for LP38511-1.8
LP38511-1.8 Summary of contents
Page 1
... Output Voltage DC accuracy is guaran- teed at ±2.5% over line, load and full temperature range from -40°C to +125°C. The LP38511-1.8 is designed for inputs from the 2.5V, 3.3V, and 5.0V rail, is stable with 10uF ceramic capacitors, and has a fixed 1.8V output. An Error Flag feature ...
Page 2
... The TO-263 TAB, and the TO-263 THIN DAP, is used as a thermal connection to remove heat from the device to an external heatsink. The TAB/DAP is internally connected to device pin 3, and is electrical ground connection. 2 Package Marking Supplied As: LP38511TJ-1.8 Rail LP38511TJ-1.8 Tape and Reel LP38511TS-1.8 Rail LP38511TS-1.8 Tape and Reel 20182905 Top View ...
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 Peak Reflow Temperature (Note 3) PSOP-8 TO-263 ESD Rating (Note 2) Power Dissipation(Note 4) Input Pin ...
Page 4
... Note 7: The line and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the output voltage tolerance specification. Note 8: Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. For the LP38511-1.8, the minimum V operating voltage is the limiting factor ...
Page 5
Typical Performance Characteristics µ µ mA. IN OUT OUT V vs Temperature OUT Ground Pin Current (I GND Ground Pin Current Temperature, V GND Unless otherwise specified: T 20182911 ...
Page 6
OUT EN V ERROR Flag Threshold vs Temperature OUT Load regulation vs Temperature www.national.com (t ) d(ON) 20182932 20182917 20182920 OUT EN d(OFF) 20182930 ERROR Flag Low vs Temperature 20182918 Line ...
Page 7
Current Limit vs Temperature Load Transient 800 µF Ceramic + 100 µF Aluminum OUT Load Transient, 250 mA to 800 μF Ceramic + 100 μF Aluminum C OUT Load Transient, ...
Page 8
PSRR, 10Hz to 1MHz www.national.com 20182929 8 Noise 20182931 ...
Page 9
... A Schottky diode is recommended for this protective clamp. SHORT-CIRCUIT PROTECTION The LP38511 is short circuit protected, and in the event of a peak over-current condition the short-circuit control loop will rapidly drive the output PMOS pass element off. Once the power pass element shuts down, the control loop will rapidly ...
Page 10
... ERROR Flag pin is immediately forced low. ERROR FLAG OPERATION EN(ON) thresh- When the LP38511 Enable pin is high, the ERROR Flag pin EN(OFF) will produce a logic low signal when the output drops by more than 15% from the nominal output voltage. The drop in output voltage may be due to low input voltage, current limiting, or thermal limiting ...
Page 11
FIGURE 2. ERROR Flag Operation, biased from V POWER DISSIPATION/HEATSINKING A heatsink may be required depending on the maximum pow- er dissipation (P ), maximum D(MAX) temperature ( the application, and the thermal re- A(MAX) sistance (θ ) ...
Page 12
Physical Dimensions TO-263, Molded, 5 Lead, 0.067in (1.7mm) Pitch, Surface Mount Package TO-263 THIN, Molded, 5 Lead, 1.7mm Pitch, Surface Mount Package www.national.com inches (millimeters) unless otherwise noted NS Package Number TS5B NS Package Number TJ5A 12 ...
Page 13
Notes 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 Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators ...