Microchip MIC23153-GYMT Manual

Microchip Ikke kategoriseret MIC23153-GYMT

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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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