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Semtech SC21150 User Manual

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POWER MANAGEMENT

Description
The SC21150 is a 5V input monolithic regulator with 1.2A
output current capability. It has an input voltage range of
2.3V to 5.5V and a reference voltage of 0.8V. The user can
use an external resistor divider to program the output
voltage. SC21150 uses an improved Adaptive-On Time
(AOT) architecture to provide excellent light-load effi-
ciency by lowering the switching frequency, while
maintaining a relative constant switching frequency at
heavy load conditions.
This guide contains information on how to use the EVB
and should be used in conjunction with the datasheet.
The datasheet contains detailed information including the
electrical characteristics, operating modes, circuit design
procedures, a typical application circuit, and other appli-
cation information.
This EVB Guide is applicable to the Rev 1 pcb layout.
SC21150 EVB
Revision 1.0
This guide is intended to help the user become familiar
with the features of the device. This EVB has many test
points and jumpers which allow the user to measure
various parameters and circuit capabilities. Users can
eliminate these test points and jumpers to simplify the
circuit for a specifi c application.
Feature Content
•
Jumper Settings
•
Evaluation Instruction
•
Evaluation Board Schematic
•
Bill of Materials and Key Components
•
Layout Drawings
© 2015 Semtech Corporation
SC21150 EVB Guide

Evaluation Board

User's Guide
1

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Summary of Contents for Semtech SC21150

  • Page 1: Evaluation Board

    Description This guide is intended to help the user become familiar The SC21150 is a 5V input monolithic regulator with 1.2A output current capability. It has an input voltage range of with the features of the device. This EVB has many test 2.3V to 5.5V and a reference voltage of 0.8V.

  • Page 2: Jumper Settings

    SC21150 EVB Guide JP2— FPWM Input Select Jumper Settings FPWM — connect pins 1-2 JP1 — Enable Jumper Power-Save(PFM) — connect pins 2-3 ON — connect to ON OFF — connect to OFF VIN Remote Sense (for tight VIN FPWM test point supply regulation) J2 —...
  • Page 3 SC21150 EVB Guide Jumper Settings (Continued) Please read the schematics and examine the evalua- Evaluation Instructions tion board to get familiar with the EVB and its con- nectors and jumpers before making any connections. Turn on the VIN external power supply and slowly in- J1 is for connecting an to input power supply.

  • Page 4: Evaluation Board Schematic

    SC21150 EVB Guide Evaluation Board Schematic Note: the default schematic is shown. Component values may vary to change the output voltage or EVB performance. Refer to the Schematic or BOM fi le provided with the EVB...
  • Page 5 SC21150 EVB Guide Bill of Materials and Key Components Item Reference Value Part Number Manufacturer PCB Foot Print 4.7μF/10V/X5R Murata SM/C 0805 10μF/10V/X5R Murata SM/C 0805 J1, J2 108-0740-001 (banana jacks) Johnson Components BJACK_PAIR_NI 0.47μH PFL2010 Coilcraft JP1, JP2 3 pin Header...
  • Page 6 SC21150 EVB Guide Layout Drawings — Top Component and Silk Screen...
  • Page 7 SC21150 EVB Guide Layout Drawings — Bottom Component and Silk Screen...

  • Page 8: Contact Information

    IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its offi cers, employees, subsidiaries, affi liates, and distributors harmless against all claims, costs damages and attorney fees which could arise.

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