MIC261201YJL EV Micrel, MIC261201YJL EV Datasheet

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MIC261201YJL EV

Manufacturer Part Number
MIC261201YJL EV
Description
Power Management IC Development Tools 28V/12A DC-DC Buck Regulator w/ HSC - Evaluation Board
Manufacturer
Micrel
Type
DC/DC Converters, Regulators & Controllersr
Datasheet
1.MIC261201YJL_EV.pdf (9 pages)

Specifications of MIC261201YJL EV

Product
Evaluation Boards
Tool Is For Evaluation Of
MIC261201
Input Voltage
4.5 V to 28 V
Output Voltage
0.8 V
Description/function
Evaluation Board
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Output Current
12 A
For Use With
MIC261201
General Description
The MIC261201 DC-DC regulator operates ov
supply range of 4.5V to 28V, and provides
output at up to 12A of out
adjustable to 0.8V, with a typical accuracy o
device operates at a switching frequency of 6
switching frequency remains fairly constant, w
in input voltage and output load.
Micrel’s Hyper Speed Control™ architecture
ultra-fast transient response, while reducing
capacitance and it also makes (High V
operation possible. The MIC261201 utilizes
T
feature is provided to ensure proper oper
power-sag conditions. It also includes an inter
feature to redu
and “hiccup” m
thermal shutdown ensures protection of the IC
conditions.
Note: This evaluation board is for 12A applicat ns.
The datashee
found on Micr
Requirements
The MIC261201 provides a 5V regulated outp
voltage V
V
linear regulator by a jumper. The output load can either be
active or passive.
Precautions
The evaluation board does not have reverse polarity
protection. Applying a negative voltage to the VIN terminal
may damage the device. In addition, the maximum V
operating voltage of the MIC261201 evaluation board is
28V. Exceeding 29V on V
Hyper Speed Control is a trademark of Micrel, Inc
MLF and MicroLead Frame are registered trademarks of Amkor Technology, Inc
July 2011
ON
DD
should be tied to PVIN pins to bypass the internal
ripp
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
le control architecture. An undervoltage
IN
ranging from 5.5V to 28V. W
el’s web site at: www.micrel.com.
t and other supporting documentati
ce the inrush current. Foldba
ode short-circuit protection, a
put current. The
IN
could damage the device.
output voltage is
hen V
IN
ck current limit
)/
nal soft-start
io
an adaptive
a
a regulated
00kHz. The
ith changes
(Low V
er an input
during fault
ut for input
f ±1%; the
tion under
the output
s well as
allows for
on can be
IN
< 5.5V,
lockout
OUT
IN
)
.
Getting Started
1. Connect an external supp
2. Connect the load to the V
3. Enabl
Ordering Information
.
408
Part Number
MIC261201YJL EV
Synchronous DC/DC Buck Regulator
) 944-0800 • fax + 1 (408) 474-1000 •
MIC261201 Evaluation Board
Apply the desired input voltag
terminals of the evaluation
attention to polarity and supp
may be placed between the
terminal to the evaluation bo
supply voltage is monitored a
ammeter and/or power lead re
voltage supplied to the input.
The load can be either passiv
in an ele
between the load and the V
the output voltage is monitor
V
3.3V, or 5.0V by a jumper.
neede
See “Outp
evaluatio
on when V
output of the
ground. A connection on the board provides easy
access to the enable pin.
OUT
28V, 12A Hyper Speed Control™
can be set to 0.9V, 1.0V
e the MIC261201. The EN pin is provided on the
d, adjust it by changing the feedback resistors.
n board. T
ctronic load). An amm
ut Voltage” section.
DD
SuperSwitcher II™
exceeds the UV
MIC2
12 A HSC DC-DC Regulator Evaluation
he output of the MIC261201 turns
61201 by shorting the EN pin to
OUT
OUT
LO threshold. Turn off he
ly to the V
input supply and the V
e (resistive) or active (as
ard. Make sure that the
ed at the V
, 1.2V, 1.5V, 1.8V, 2.5V,
If a different voltage is
http://www.micrel.com
e to the V
ly voltage. An ammeter
sistance can reduce the
Description
and ground terminals.
t the V
board, paying careful
terminal. Ensure that
Board
eter can be placed
M9999-071511-A
IN
IN
terminal. The
OUT
IN
and ground
terminal.
terminal.
IN

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MIC261201YJL EV Summary of contents

Page 1

... V output of the ground. A connection on the board provides easy access to the enable pin. ut for input hen V < 5.5V, IN Ordering Information Part Number MIC261201YJL 408 ) 944-0800 • fax + 1 (408) 474-1000 • SuperSwitcher II™ the the V IN board, paying careful ly voltage ...

Page 2

... Micrel, Inc. Output Voltage The output voltage on the MIC261201 evalu is adjustable. Set it by adjusting the (R4 and one of R5, R6, R7, R8, R9, R10, R11, or R12) and can be calculated as follows as an example: = × OUT REF where V = 0.8V. REF The output voltage above is set at th ...

Page 3

... Micrel, Inc. Evaluation Board Performance Efficiency (V = 5V) IN vs. Output Current 100 OUTPUT CURRENT (A) Thermal Derating* vs. Ambient Temperature 1.8, 2.5, 3.3V OUT 2 0 -50 - 100 AMBIENT TEMPERATURE (°C) Die Temperature*: The temperature measurement was taken at the hottest point on the MIC261201 case mounted square inch 4 layer, 0.62” ...

Page 4

... Micrel, Inc. Evaluation Board Schematic July 2011 Schematic of MIC261201 Evaluation Board (J11, R13, R15 are for testing purposes) 4 MIC261201 12A Evaluation Board M9999-071511-A ...

Page 5

... Micrel, Inc. Bil l of Mat erials Item Part Numb er C1 Open 12105C475KAZ2A C2, C3 GRM32ER71H475KA88L C3225X7R1H4 C15 Open 12106D107MAT2A C4, C5, C13 GRM32ER60J107ME20L C3225X5 R0J107M 06035C104KAT2A C6, C7, C10 GRM188R71H104KA93D C1608X7R 1H104K 0603ZC105KAT2A C8 GRM188R71A105KA61D C1608X7R 1A105K 0603ZD225KAT2A C9 GRM188R61A225KE34D C1608X5R1A225K 06035C472KAZ2A C12 GRM188R71H472K C1608X7R1H C14 ...

Page 6

... Notes: 1. AVX: www.avx.com 2. Murata: www.murata. com 3. TDK: www.tdk.com 4. EPCOS: www.epcos.com 5. MCC: http://www.mcc.com 6. Diode Inc.: www.diodes.com 7. Vishay: www.vishay.com 8. Cooper Bussmann: www.cooperbussmann.com 9. Micrel, Inc.: www.micrel.com July 2011 ) Man ufacturer Descrip ( ishay Dale 0Ω Resis (7) Vishay Dale 49.9Ω Resistor, Size 0603 ishay Dale 1.21Ω ...

Page 7

... Micrel, Inc. PCB Layout Recommendations July 2011 Top Layer Mid-Layer 1 (Ground Plane) 7 MIC261201 12A Evaluation Board M9999-071511-A ...

Page 8

... Micrel, Inc. PCB Layout Recommendations (Continued) July 2011 Mid-Layer 2 Bottom Layer 8 MIC261201 12A Evaluation Board M9999-071511-A ...

Page 9

... 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 ...

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