Microchip MIC23153-GYMT Manual


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Side 1/6
MIC23153 Evaluation Board
4MHz PWM 2A Buck Regulator with
HyperLight Load™ and Power Good
HyperLight Load is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademark Amkor Technology 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
February 2010 M9999-020510-A
General Description
This board enables the evaluation of the MIC23153, a
fully integrated 2A, 4MHz switching regulator featuring
HyperLight Load™ mode, Power Good output indicator,
and programmable soft-start. The MIC23153 is highly
efficient throughout the entire output current range,
drawing just 23µA of quiescent current in operation. The
tiny 2.5mm x 2.5mm Thin MLF® package, in combination
with the 4MHz switching frequency, enables a compact
sub-1mm height solution with only four external
components. The MIC23153 provides accurate output
voltage regulation under the most demanding conditions
and responds extremely quickly to a load transient with
exceptionally small output voltage ripple.
Requirements
This board needs a single 10W bench power source
adjustable from 2.7V to 5.5V. The loads can either be
active (electronic load) or passive (resistor) with the
capability to dissipate 7W. It is ideal to have an
oscilloscope available to view the circuit waveforms, but
not essential. For the simplest tests, two Voltage meters
are required to measure input and output voltage. For
efficiency measurements, two Voltage meters and two
Ammeters are required to prevent errors due to
measurement inaccuracies.
Precautions
There is no reverse input protection on this board. Be
cautious when connecting the input source to ensure
correct polarity is observed.
Getting Started
1. Connect an external supply to the VIN (J4)
terminal and GND (J3). With the output of the
power supply disabled, set its voltage to the
desired input test voltage (2.7V VIN 5.5V). An
ammeter may be placed between the input
supply and the VIN (J4) terminal. Be sure to
monitor the supply voltage at the VIN (J4)
terminal, as the ammeter and/or power lead
resistance can reduce the voltage supplied to
the device.
2. Connect a load to the VOUT (J1) and ground
(J2) terminals. The load can be either active
passive (resistive) or active (electronic load). An
ammeter may be placed between the load and
the output terminal. Ensure the output voltage is
monitored at the VOUT (J1) terminal.
3. Enable the MIC23153. The MIC23153
evaluation board has a pull-up resistor to V IN
. By
default, the output voltage will be enabled when
the input supply of >2.7V is applied. To disable
the device, apply a voltage below 0.5V to the EN
(J6) terminal.
4. Power Good. A Power good test point (J5) is
provided to monitor the Power Good function.
The Power Good output will go high (Vout)
approximately 70µs after the output voltage
reaches 92% of its nominal voltage.
Ordering Information
Part Number Description
MIC23153-GYMT 1.8V Fixed Output Evaluation Board
MIC23153YMT Adjustable Output Evaluation Board


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC23153-GYMT

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