Microchip MIC23450-AAAYML Manual

Microchip Ikke kategoriseret MIC23450-AAAYML

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Side 1/9

MIC23450 Evaluation Board

3 , , MHz PWM 2A Triple Buck Regulator

with HyperLight Load

and Power Good

HyperLight Load is a trademark of Micrel, Inc.registered

MLF and LeadFrame are registered trademark Amkor Technology Inc.Micro

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( ) 944 0800 • fax + 1 (408) 474 1000 • 408 - - http://www.micrel.com

February 4, 2013

Revision 1.0

General Description

This board allows the customer to evaluate the

MIC23 output 3MHz450, a fully integrated, triple- - , 2A,

switching regulator that features HyperLight Load ® mode

and ood 450 power g (PG) output indicator . The MIC23s

is highly efficient throughout the output current range,

drawing just 23 A of quiescent cu for each channel µ rrent

in operation. The tiny 5mm x 5mm MLF® package saves

board space and requires few external components. The

MIC23450 provides 2.5% accuracy and± output voltage

each channel typically in less than 10 to a responds µs

load transient with output voltage ripple.as low as 5mV

Requirements

This board needs a single 40W bench power source,

adjustable from to 5.5 . The loads can 2.7V V be either

active (electronic load) or passive (re and must be sistor),

able to to dissipate 20W. It is ideal, but not essential,

have an oscilloscope available to view the circuit

waveforms. require oltage The simplest tests vtwo

meters to measure input and output voltage. Efficiency

measurements require oltage for a single channel vtwo

meters and meterstwo am to prevent errors caused by

measurement inaccuracies.

Precautions

There is no reverse input protection on this board. Be

careful make when connecting the input source to sure

correct polarity is observed.

Getting Started

1. Connect an external supply to the VIN ) (J1

terminal and (JGND 3).

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 ( ) . J1 terminal Be sure to monitor

the supply voltage at the VIN ( ) J1 terminal, as the

ammeter and/or power lead resistance can reduce

the voltage supplied to the device.

2. Connect a load Vto the OUT terminals (J2, J5, J7)

and ground (J4, J6, J8) .terminals

The load can be either active passive (resistive) or

active (electronic load). An ammeter may be placed

between the load and the output terminals s. Make

sure the output voltage is monitored at VOUT1, VOUT2

and VOUT3 ( ) s. J2, J5 and J7 terminal The board has

multiple 2- s ) pin connector (JP1, JP2 and JP3 to

allow for output voltage monitoring of VOUT1

, VOUT2

and VOUT3 . respectively

3. Enable the Supply to MIC23450.

The MIC23450 evaluation up board has a pull-

resistor to VIN for each channel By default, . each

output voltage bled when the input supply of is ena

> V 2.7 is applied. Each channel 1, 2 or 3 can be

disabled by the Eapplying 0.4 a voltage below V to N

terminal or J14 respectivelyJ10, J12 .

4. Power Good.

The board provides a test point power ood g (J9,

J11, and J13 to monitor for ) the power good function

each channel The of the s 1, 2, and 3 respectively.

power good output high (goes VOUT) nominally 62 µs

after reaches the output voltage 90% of its nominal

voltage.

Ordering Information

Part Number Description

MIC23 YML450-AAA EV 3MHz, PWM,

2A Triple Buck

R egulator Evaluation Board

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	MIC23450-AAAYML

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