LMZ10503TZE-ADJ/NOPB National Semiconductor, LMZ10503TZE-ADJ/NOPB Datasheet
LMZ10503TZE-ADJ/NOPB
Specifications of LMZ10503TZE-ADJ/NOPB
Related parts for LMZ10503TZE-ADJ/NOPB
LMZ10503TZE-ADJ/NOPB Summary of contents
Page 1
... Noise sensitive applications (i.e. transceiver, medical) Note 1: Note 1: θ measured on a 2.25” x 2.25” (5 5.8 cm) four layer board. Refer to JA AN-2022. Note 2: Note 2: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See © 2010 National Semiconductor Corporation LMZ10503 Performance Benefits ■ Operates at high ambient temperatures ■ ...
Page 2
... Typical Application Circuit Connection Diagram Ordering Information Order Number Supplied As LMZ10503TZE-ADJ 45 Units in a Rail LMZ10503TZ-ADJ 250 Units in Tape and Reel LMZ10503TZX-ADJ 500 Units in Tape and Reel Pin Descriptions Pin Number Name 1 VIN Power supply input. A low ESR input capacitance should be located as close as possible to the VIN pin and exposed pad (EP) ...
Page 3
Pin Number Name 6, 7 VOUT The output terminal of the internal inductor. Connect the output filter capacitor between VOUT pin and EP. EP Exposed Exposed pad is used as a thermal connection to remove heat from the device. Connect ...
Page 4
... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN, VOUT, EN, FB GND ESD Susceptibility (Note 6) Power Dissipation Junction Temperature Electrical Characteristics apply over the operating junction temperature range T test, design, or statistical correlation. Typical values represent the most likely parametric norm at T reference purposes only ...
Page 5
Electrical Characteristics apply over the operating junction temperature range T test, design, or statistical correlation. Typical values represent the most likely parametric norm at T reference purposes only 3.3V, unless otherwise indicated in the conditions column. ...
Page 6
Typical Performance Characteristics V = 5.0V µF 10V X5R ceramic capacitor Load Transient Response V = 3.3V 2.5V 0.3A to 2.7A to 0.3A step IN OUT OUT 20 MHz Bandwidth ...
Page 7
Efficiency V = 3.3V OUT 30111871 Efficiency V = 1.8V OUT 30111869 Efficiency V = 1.2V OUT 30111868 7 Efficiency V = 2.5V OUT 30111870 Efficiency V = 1.5V OUT 301118a0 Efficiency V = 0.8V OUT 30111867 www.national.com ...
Page 8
Current Derating = 5V, θ 20° Radiated Emissions (EN55022, Class 5V 2.5V OUT Evaluation board Pre-biased Startup V = 2.5V, I OUT OUT www.national.com 301118b3 = 3A ...
Page 9
Block Diagram General Description The LMZ10503 SIMPLE SWITCHER® power module is a complete, easy-to-use DC-DC solution capable of driving load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. The LMZ10503 is available ...
Page 10
A second criteria before finalizing the C the RMS current capability. The necessary RMS current rat- ing of the input capacitor to a buck regulator can be estimated by With this high AC current present in the input capacitor, the ...
Page 11
TABLE 1. Recommended Output Filter Capacitors C (µF) Voltage (V), R (mΩ) O ESR 22 6.3, < 6.3, < 6.3, < 10.0, < 5 100 6.3, < 5 100 6.3, 50 100 6.3, 25 ...
Page 12
Estimate Power Dissipation And Board Thermal Requirements Use the current derating curves in the typical performance characteristics section to obtain an estimate of power loss (P ). For the design case of V IC_LOSS 85°C ...
Page 13
Additional Features Enable The LMZ10503 features an enable (EN) pin and associated comparator to allow the user to easily sequence the LMZ10503 from an external voltage rail manually set the input UVLO threshold. The turn-on or rising threshold ...
Page 14
A value of 33 kΩ recommended for compromise between high precision and low quies- trkt cent current through the divider while minimizing the effect of the 2 µA soft-start current source. For ...
Page 15
LMZ10503 Application Circuit Schematic and BOMs This section provides several application solutions with an associated bill of materials. The compensation for each solu- tion was optimized to work over the full input range. Many TABLE 3. Bill of Materials, V ...
Page 16
TABLE 5. Bill of Materials 3. Designator Description U1 SIMPLE SWITCHER® µF, X5R, 10V in1 C 220 µF, 10V, AL-Elec in2 C 4.7 µF, X5R, 10V µF, X5R, 6.3V ...
Page 17
TABLE 7. Bill of Materials for Evaluation Board, V Designator Description U1 SIMPLE SWITCHER® µF, X7R, 16V in1 4.7 µF, X5R, 6.3V in2 µF, X5R, 16V in3 ...
Page 18
TABLE 9. Bill of Materials 5V Designator Description U1 SIMPLE SWITCHER® µF, X7R, 16V in1 C 4.7 µF, X5R, 6.3V in2 C 47 µF, X5R, 6.3V in3 C 100 µF, X5R, 6. ...
Page 19
PCB Layout Diagrams The PCB design is available in the LMZ10503 product folder at www.national.com. FIGURE 6. Top Copper FIGURE 7. Internal Layer 1 (Ground) 19 30111876 30111877 www.national.com ...
Page 20
FIGURE 8. Internal Layer 2 (Ground and Signal Traces) www.national.com FIGURE 9. Bottom Copper 20 30111878 30111879 ...
Page 21
Physical Dimensions inches (millimeters) unless otherwise noted TO-PMOD-7 Pin Package NS Package Number TZA07A 21 www.national.com ...
Page 22
... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com 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 ...