Micrel mic28510 Manual

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 ge is adjustable down to 0.8V with
typical accuracy of ±1%. The switching freq
adjustable and once adju
remains fairly constant with chang
and output load.
The basic parameters of the eva
• Input Voltage − 5V to 75V
• Output Voltage − 0.8V to 5V at 4A
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
on Micrel' s web site at: www.micrel.com
Requirements
The MIC28510 evaluation board requires o
power supply with at least 10A current ca
linear regulator, which includes a Zener an
transisto r, has been installed on the board to provide
housekeeping (V ) for the MIC28510. The output
DD
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.
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 •
March 2012
s over an
provides a
rrent. The
uency is
sted the switching fre quency
es in in put voltage
luation board are:
(1)
(2)
l
tion can be found
nly a ngle si
pab y. A ilit
d an
MIC28510 Evaluation Board
75V/4A Hyper Speed Control™
Synchronous DC/DC Buck Regulator

Getting Started

1. V Supply. Connect a po
IN
and GND terminals, paying
polarity and supply voltag
a
75V). The input current IIN
a current meter. Do not app
2. Connect Load and Monito
load to the V
be either a passive (resisti
an electronic load) type. A
placed between the V
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
evaluation board for users to easily access the
enable
on the E
short the EN pin to GND
the MIC28510 evalua
4. Turn On the Power. Turn on the VIN supply and
verify that the output voltage is regulated to 3.3V.
Ordering Information
NP N
Part Number
MIC28510 5V EV
MIC28510 12V EV
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
and GND terminals. The load can
OUT
ve) or an active (as in
current meter may be
terminal and load to
OUT
OUT
tor to VDD, which allows the output to
tor is provided on the
feature. Applying an external logic signal
N pin to pull it low or using a jumper to
will shut off the output of
tio n board.
Description
Evaluation Board up to 5V Output
Evaluation Board 12V Output
http://www.micrel.com
hbwhelp@micrel.com
re the output
terminal.
s an internal 100k
eds its UVLO
M9999-030712
or (408) 955-1690