MIC261203YJL EV Micrel, MIC261203YJL EV Datasheet

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MIC261203YJL EV

Manufacturer Part Number
MIC261203YJL EV
Description
Power Management IC Development Tools 28V/12A DC-DC Buck Regulator w/ HLL - Evaluation Board
Manufacturer
Micrel
Type
DC/DC Converters, Regulators & Controllersr
Datasheet

Specifications of MIC261203YJL EV

Product
Evaluation Boards
Tool Is For Evaluation Of
MIC261203
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
MIC261203
General Description
The MIC261203 DC-DC regulator operates over an input
supply range of 4.5V to 28V, and provides a regulated
output at up to 12A of output current. The output voltage
is adjustable to 0.8V with a typical accuracy of ±1%; the
device operates at a switching frequency of 600kHz. The
switching frequency remains fairly constant with changes
in input voltage and output load.
Micrel’s Hyper Light Load™ architecture provides the
same high-efficiency and ultra-fast transient response as
the Hyper Speed Control™ architecture under medium
to heavy loads, but also maintains high efficiency under
light load conditions by transitioning to
frequency, discontinuous mode operation.
The MIC261203 utilizes an adaptive T
architecture. An undervoltage lockout feature is provided
to ensure proper operation under power-sag conditions.
An internal soft-start feature is provided to reduce the
inrush current. Foldback current limit and “hiccup” mode
short-circuit protection and thermal shutdown ensures
protection of the IC during fault conditions.
Note
The datasheet and supporting documentation can be
found on Micrel’s web site at: www.micrel.com.
Requirements
The MIC261203 provides a 5V regulated output for input
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
evaluation board is 28V. Exceeding 29V on V
damage the device.
Hyper Light Load and Hyper Speed Control are trademarks of Micrel, Inc.
MLF and MicroLead Frame are registered trademarks of Amkor Technology, Inc.
July 2011
DD
: This evaluation board is for 12A applications.
should be tied to PVIN pins to bypass the internal
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
IN
ranging from 5.5V to 28V. When V
IN
operating voltage of the MIC261203
ON
ripple control
IN
variable
IN
< 5.5V,
could
Getting Started
Ordering Information
1. Connect an external supply to the V
2. Connect the load to the V
3. Enable the MIC261203. The EN pin is provided
MIC261203 Evaluation Board
Part Number
MIC261203YJL EV
Synchronous DC-DC Buck Regulator
terminal. Apply the desired input voltage to the
V
board, paying careful attention to polarity and
supply voltage. An ammeter may be placed
between the input supply and the V
the evaluation board. Ensure that the supply
voltage is monitored at the V
ammeter and/or power lead resistance can
reduce the voltage supplied to the input.
terminals. The load can be either passive
(resistive) or active (as in an electronic load).
An ammeter can be placed between the load
and the V
voltage is monitored at the V
can be set to 0.9V, 1.0V, 1.2V, 1.5V, 1.8V,
2.5V, 3.3V, or 5.0V by a jumper. If a different
voltage is needed, it can be adjusted by
changing the feedback resistors. See “Output
Voltage” section.
on the evaluation board. The output of the
MIC261203 turns on when V
UVLO threshold. The output of the MIC261203
may be turned off by shorting the EN pin to
ground. A connection on the board provides
easy access to the enable pin.
IN
28V, 12A HyperLight Load
and ground terminals of the evaluation
SuperSwitcher IIG
OUT
terminal. Ensure that the output
12A HLL DC-DC Regulator
Evaluation Board
Description
http://www.micrel.com
OUT
OUT
IN
TM
DD
terminal. V
terminal. The
and ground
exceeds the
IN
®
terminal to
M9999-071511-A
OUT
IN

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MIC261203YJL EV Summary of contents

Page 1

... MIC261203 turns on when V UVLO threshold. The output of the MIC261203 may be turned off by shorting the EN pin to < 5.5V, IN ground. A connection on the board provides easy access to the enable pin. Ordering Information Part Number MIC261203YJL EV could IN ® TM SuperSwitcher IIG and ground terminals of the evaluation terminal to IN terminal ...

Page 2

... Micrel, Inc. Output Voltage The output voltage on the MIC261203 evaluation board is adjustable set by adjusting the feedback resistors (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 the factory for a 1.2V ...

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 MIC261203 case mounted square inch 4 layer, 0.62” ...

Page 4

... Micrel, Inc. Evaluation Board Schematic July 2011 Schematic of MIC261203 Evaluation Board (J11, R13, R15 are for testing purposes) 4 MIC261203 10A Evaluation Board M9999-071511-A ...

Page 5

... Micrel, Inc. Bill of Materials Item Part Number C1 Open 12105C475KAZ2A C2, C3 GRM32ER71H475KA88L C3225X7R1H475K C15 Open 12106D107MAT2A C4, C5, C13 GRM32ER60J107ME20L C3225X5R0J107M 06035C104KAT2A C6, C7, C10 GRM188R71H104KA93D C1608X7R1H104K 0603ZC105KAT2A C8 GRM188R71A105KA61D C1608X7R1A105K 0603ZD225KAT2A C9 GRM188R61A225KE34D C1608X5R1A225K 06035C472KAZ2A C12 GRM188R71H472K C1608X7R1H472K C14 B41851F7227M C11, C16 Open SD103AWS D1 SD103AWS-7 ...

Page 6

... 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 Manufacturer Description (7) Vishay Dale 0Ω Resistor, Size 0603, 5% (7) Vishay Dale 49.9Ω Resistor, Size 0603, 1% (7) Vishay Dale 1.21Ω Resistor, Size 0603, 1% (9) Micrel ...

Page 7

... Micrel, Inc. PCB Layout Recommendations July 2011 Top Layer Mid-Layer (Ground Plane) 7 MIC261203 10A Evaluation Board M9999-071511-A ...

Page 8

... Micrel, Inc. PCB Layout Recommendations (Continued) July 2011 Mid-Layer 2 Bottom Layer 8 MIC261203 10A 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 July 2011 indemnify Micrel for any damages resulting from such use or sale ...

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