MIC5301-3.3YMT Evaluation Board User Guide

MIC5301/18 Evaluation Board
Single µCap ULDO™
General Description
The demonstration board can be used to evaluate both the
MIC5301 and MIC5318 low dropout linear regulators. The
MIC5301 and MIC5318 are offered in fixed and adjustable
outputs. Fixed output versions add bypass pin functionality, allowing reduced output noise. The adjustable
version allows for the use of a resistor divider network to
adjust for the desired output voltage. The evaluation board
accommodates the fixed version.
Requirements
The MIC5301/18 requires a power supply that is able to
deliver 300mA with an input voltage range of 2.3V to 6V.
The output load can be either an active or passive load.
Circuit Description
The MIC5301/18 single Ultra Low Dropout (ULDO™)
linear regulator is easy to use. A minimum output
capacitance of 1µF is required.
An input capacitor is required when the power supply is
more than 4” away from the device. All evaluation boards
include an input capacitor within 1” of the device. This is
the minimum recommended distance from the device that
the capacitor should be placed.
The evaluation board has a 10µF ceramic on the VIN pin.
Although this is much larger than required for the device,
this was designed to allow for the long inductive test leads
that will be attached to the evaluation board
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Getting Started
1. Connect an external supply to VIN terminal. Apply VIN
(J3) and ground (J2 and J4) terminals of the evaluation
board, paying careful attention to polarity and supply
voltage (2.3V to 6V). Be sure to monitor the supply voltage
at the VIN terminal.
2. Enable the MIC5301/18. Force the enable pin (J1) high
to enable the output. Do not leave the enable pin floating.
A floating enable pin may cause an indeterminate state on
the output.
3. Connect the load to VOUT terminal (J5) and ground
terminals (J4 or J2). The load can be either passive
(resistor) or active (electronic load). Be sure to monitor the
output voltage at the VOUT terminal.
MIC5301/18-x.xYMT
J1
EN
EN
J2
GND
GND
J3
VIN
VIN
BYP
C2
0.1µF/25V
NC
C3
1µF/6.3V
VOUT
J4
GND
J5
VOUT
C1
10µF/6.3V
MIC5301/18YMT Schematic
ULDO is a trademark of Micrel, Inc
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
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Micrel, Inc.
MIC5301/18Evaluation Board
Bill of Materials
Item
C1
C2
Part Number
TDK(1)
GRM188R60J106K
muRata(2)
VJ0805G106KXYCW1BC
Vishay(3)
JMK107BJ106MA
Taiyo Yuden(4)
06036D106MAT2A
AVX(5)
C1608X5R1E104M
TDK(1)
GRM188R61E104KA01D
VJ0603Y104KXX
C1608X5R0J105M
C3
U1
Manufacturer
C1608X5R0J106M
10µF, ceramic capacitor, 0603, 6.3V
1
0.1µF, ceramic capacitor, 0603, 6.3V
muRata
0.1µF, ceramic capacitor, 0603, 25V
(3)
Vishay
1
TDK(1)
muRata(2)
VJ0603G105KXYCW1BC
Vishay(3)
MIC5318YMT
Qty.
(2)
GRM188R60J105KE19D
MIC5301YMT or
Description
Micrel, Inc.(6)
1µF, ceramic capacitor, 0603, 6.3V
1
ULDO with Single Output
1
Notes:
1. TDK: www.tdk.com
2. muRata: www.murata.com
3. Vishay: www.vishay.com
4. Taiyo Yuden: www. t-yuden.com
5. AVX: : www.avxcorp.com
6. Micrel, Inc.: www.micrel.com
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Micrel, Inc.
MIC5301/18Evaluation Board
PCB Layout
Top Layer
Bottom Layer
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M9999-030707-A
Micrel, Inc.
MIC5301/18Evaluation Board
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2007 Micrel, Incorporated.
March 2007
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