Microchip MIC45116-1YMP Manual

Microchip niet gecategoriseerd MIC45116-1YMP

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Side 1/8
MIC45116 Evaluation Board
20V/6A/DC- - to DC Power Module
General Description
Micrel’s MIC45116 is a synchronous step down regulator -
module, featuring a unique adaptive ON time control -
architecture. The singular module package cludes in -a DC
to-DC controller, power MOSFETs, bootstrap diode,
bootstrap capacitor, and an inductor; simplifying the design
and layout process for the end user.
This highly integrated solution expedites system design
and improves product time- -to market. The internal
MOSFETs and inductor have been optimized to achieve
high efficiency at a low output voltage. The fully optimized
design can deliver up to a 6A current under a wide input
voltage range of 4.75V to 20V, without an additional
cooling requirement.
The MIC 1 uses Micrel’s HyperLight Load45116- ® . (HLL)
MIC45116-2 uses Micrel’s Hyper Speed Control™
architecture which enables ultra fast load transient -
response s and allow for a reduction of output capacitance.
The MIC45116 offers 1% output accuracy that can be
adjusted from 0.8V input voltage with two up ofto 85% the
external resistors. Note the output capacitor Cb is only
rated to 6.3V.
The basic parameters of th evaluation board include a is
4.75V to 20V input, a 0.8V to 5V at 6A output.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Requirements
The MIC45116 1 and MIC45116 2 evaluation board’s - -
minimum requirement is one power supply with at least 6A
current capability. No external linear regulator is required
to power the internal biasing of the IC because the
MIC45116 has an internal PVDD LDO. In the applications
with VIN < +5.5V, PVDD should be tied to VIN to bypass
the internal linear regulator. The output load can either be
a passive or an active load.
Precautions
The MIC45116 evaluation board does not have reverse
polarity protection. Applying a negative voltage to the VIN
and GND terminals may damage the device. The
maximum VIN of the board is rated at 20V. Exceeding 30V
on the VIN could damage the device. The voltage rating of
the output capacitor is 6.3V. The output capacitor should
be replaced with higher voltage rated one to set the output
voltage above 5V.
Getting Started
1. VIN Supply
Connect a supply to the VIN (TP6) (TP7) and GND
terminals, paying careful attention to the polarity and
the supply range (4.75V < VIN < 20V). Monitor IIN with
a current meter and monitor input voltage at VIN and
GND terminals with a voltmeter. Do not apply power
until Step 4.
2. Connect Load and Monitor Output
Connect a load to the VOUT (TP8) (TP9) and GND
terminals. The load can be either a passive (resistive)
or an active (as in an electronic load) type. A current
meter may be placed between the VOUT terminal and
load to monitor the output current. Ensure the output
voltage is monitored at the VOUT terminal.
3. Enable Input
The EN pin has an on board 100kΩ pull-up resistor
(R4) to VIN, which allows the output to be turned on
when PVDD exceeds its UVLO threshold. An EN
connector (TP3) is provided on the evaluation board
for users to easily access the enable feature. Applying
an external logic signal on the EN pin to pull it low or
using a jumper to short the EN pin to GND will shut off
the output of the MIC45116 evaluation board.
4. Turn Power
Turn on the VIN supply and verify that the output
voltage is regulated to 1.8V.
5. Loop Measurement
Control loop frequency response can be measured by
injecting AC sweep signal and measuring voltage
across test points A and B. R3 should change to a
small resistor value in the range of 10 to 20Ω Ω for the
loop measurement.
Ordering Information
Part Number Description
MIC45116 MIC45116- 1YMP EV -1 Evaluation Board
MIC45116 MIC45116- 2YMP EV -2 Evaluation Board
Hyper LightLoad is a registered trademark of Micrel, Inc.
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 12 , 2015 Revision 1.0

Produkt Specifikationer

Mærke: Microchip
Kategori: niet gecategoriseerd
Model: MIC45116-1YMP

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