LMZ10503 Datasheet | National Semiconductor

Features - Integrated shielded inductor - Flexible startup sequencing using external soft-start, tracking, and precision enable UVLO and output short-circuit Efficiency (VOUT = 3.3V) - Protection against in-rush currents and faults such as input - -40°C to +125°C junction temperature operating range - Single exposed pad and standard pinout for easy mounting and manufacturing - Pin-to-pin patible with LMZ10504 (4A/20W max) LMZ10505 (5A/25W max) - Fully enabled for WEBENCH® and Power Designer Applications - - - - Point-of-load conversions from 3.3V and 5V rails Space constrained applications Extreme temperatures/no air flow environments Noise sensitive applications (i.e. transceiver, medical) Radiated Emissions (EN 55022, Class B) Note 1: Note 1: θ JA measured on a 2.25” x 2.25” (5.8 cm x 5.8 cm) four layer board. Refer to PCB Layout Diagrams or Evaluation Board Application Note: AN-2022. Note 2: Note 2: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See Figure 5 and layout for information on device under test. 301118a6 © 2010 National Semiconductor Corporation .national. ..net Typical Application Circuit Connection Diagram Top View 7-Lead TO-PMOD Ordering Information Order Number LMZ10503TZE-ADJ LMZ10503TZ-ADJ LMZ10503TZX-ADJ Supplied As 45 Units in a Rail 250 Units in Tape and Reel 500 Units in Tape and Reel TO-PMOD-7 TZA07A LMZ10503TZ-ADJ Package Type NSC Package Drawing Package Marking Pin Descriptions Pin Number 1 2 3 Name VIN EN SS Description Power supply input. A low ESR input capacitance should be located as close as possible to the VIN pin and exposed pad (EP). Active high enable input for the device. Soft-start control pin. An internal 2 µA current source charges an external capacitor connected between SS and GND pins to set the output voltage ramp rate during startup. The SS pin can also be used to configure the tracking feature . Power ground and signal ground....