Microchip MIC23450-AAAYML Handleiding

Bekijk gratis de handleiding van Microchip MIC23450-AAAYML (9 pagina’s), behorend tot de categorie Niet gecategoriseerd. Deze gids werd als nuttig beoordeeld door 43 mensen en kreeg gemiddeld 4.8 sterren uit 5 reviews. Heb je een vraag over Microchip MIC23450-AAAYML of wil je andere gebruikers van dit product iets vragen? Stel een vraag

MIC23450 Evaluation Board

3, , MHzPWM2A 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 () 9440800 • fax + 1 (408) 4741000 • 408 -- http://www.micrel.com

February 4, 2013

Revision 1.0

General Description

This board allows the customer to evaluate the

MIC23output3MHz450, a fullyintegrated, triple--, 2A,

switching regulator that featuresHyperLight Load ® mode

andood 450 power g(PG) output indicator. The MIC23s

is highly efficient throughout the output currentrange,

drawing just 23A of quiescent cufor each channel µrrent

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

board space and requires few external components. The

MIC23450 provides 2.5% accuracyand±output voltage

each channeltypically in less than 10to 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 Vbe either

active (electronic load) or passive (reand must be sistor),

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

have an oscilloscope available to view the circuit

waveforms. requireoltage The simplest tests vtwo

meters to measure input and output voltage. Efficiency

measurementsrequireoltage 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 supplydisabled, 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() . J1terminalBe sure to monitor

the supply voltage at the VIN () J1terminal, 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 loadand the output terminals s. Make

sure the output voltage is monitored at VOUT1, VOUT2

andVOUT3( ) s. J2, J5 andJ7terminalThe board has

multiple 2-s ) pin connector(JP1, JP2 andJP3to

allow for output voltage monitoringof VOUT1

, VOUT2

and VOUT3 . respectively

3. Enable the Supply to MIC23450.

The MIC23450 evaluation up board has a pull-

resistor to VIN for each channelBy default, . each

output voltage bled when the input supply of is ena

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

disabled by the Eapplying0.4 a voltage below V toN

terminal orJ14 respectivelyJ10, J12 .

4. Power Good.

The board provides atest point power ood g(J9,

J11, and J13to monitorfor ) the power good function

each channelThe of the s 1, 2, and 3 respectively.

power good output high (goes VOUT) nominally62 µs

after reaches the output voltage 90% of its nominal

voltage.

Ordering Information

Part Number Description

MIC23YML450-AAA EV 3MHz, PWM,

2A Triple Buck

R egulator Evaluation Board

Product specificaties