MIC28510 Evaluation Board
75V/4A Hyper Speed Control
™
Synchronous DC/DC Buck Regulator
Hyper Speed Control 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
March 2012
M9999-030712
or (408) 955-1690
ge is adjustable down to 0.8V with
sted the switching fre
es in in
and output
luation board are:
•
Input Voltage
−
5V to 75V
Output
Voltage
−
0.8V to 5V at 4A
(1)
(2)
•
l
tion can be
s web site at:
www.micrel.com
General Description
The MIC28510 DC/DC regulator operate
input supply range of 4.5V to 75V and
regulated output at up to 4A of output cu
output volta
s over an
provides a
rrent. The
a
uency is
quency
put voltage
typical accuracy of ±1%. The switching freq
adjustable and once adju
remains fairly constant with chang
load.
The basic parameters of the eva
•
12V at up to 4A
250kHz Switching Frequency
(Adjustable from 100kHz to 500kHz)
Notes:
1, 2. Refer to thermal de-rating curves shown in Typica
Characteristics section.
Datasheets and support documenta
found
on Micrel’
nly a ngle
pab y. A
d an
N
r, has been installed on the board to provide
housekeeping (V
DD
) for the MIC28510. The output
load can either be a passive or an active load.
Precautions
The MIC28510 evaluation board does not have
reverse polarity protection. Applying a negative
voltage to the PVIN and GND terminals may damage
the device. The maximum PVIN of the board is rated
at 75V. Exceeding 75V on the PVIN could damage the
device.
wer supply to the VIN
careful attention to the
e range (5V
<
VIN
<
can be monitored with
ly power until Step 4.
r Output
. Connect a
GND terminals. The load can
ve) or an active (as in
current meter may be
terminal and load to
re the output
OUT
terminal.
s an internal 100k
tor to VDD, which allows the output to
eds its UVLO
tor is provided on the
evaluation board for users to easily access the
feature. Applying an external logic signal
N pin to pull it low or using a jumper to
will shut off the output of
n board.
4.
Turn On the Power
. Turn on the VIN supply and
verify that the output voltage is regulated to 3.3V.
Ordering Information
Part Number
Description
Requirements
The MIC28510 evaluation board requires o
power supply with at least 10A current ca
linear regulator, which includes a Zener an
transisto
si
ilit
NP
Getting Started
1.
V
IN
Supply
. Connect a po
and GND terminals, paying
polarity and supply voltag
75V). The input current IIN
a current meter. Do not app
2.
Connect Load and Monito
load to the V
OUT
and
be either a passive (resisti
an electronic load) type. A
placed between the V
OUT
monitor the output current. Ensu
voltage is monitored at the V
3.
Enable Input
. The EN pin ha
pull-up resis
be turned on when VDD exce
threshold. An EN connec
enable
on the E
short the EN pin to GND
tio
the MIC28510 evalua
MIC28510 5V EV
Evaluation Board up to 5V Output
MIC28510 12V EV
Evaluation Board 12V Output
