MIC22705YML EV Micrel, MIC22705YML EV Datasheet

MIC22705YML EV

Manufacturer Part Number

MIC22705YML EV

Description

Power Management IC Development Tools 1MHz 7A Integrated Switch High-Efficiency Synch Buck w/ Pre-bias Support - Evaluation Board

Manufacturer

Micrel

Type

DC/DC Converters, Regulators & Controllersr

Datasheet

1.MIC22705YML_EV.pdf (9 pages)

Specifications of MIC22705YML EV

Product

Evaluation Boards

Tool Is For Evaluation Of

MIC22705

Input Voltage

2.9 V to 5.5 V

Output Voltage

0.7 V

Description/function

Evaluation Board

Maximum Operating Temperature

+ 125 C

Minimum Operating Temperature

- 40 C

Output Current

7 A

For Use With

MIC22705

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General Description

The Micrel MIC22705 is a high-efficiency, 7A, integrated

switch, synchronous buck (step-down) regulator. The

MIC22705 achieves more than 95% efficiency and

switches at 1MHz. The ultra-high speed control loop keeps

the output voltage within regulation even under the

extreme transient load swings commonly found in FPGAs

and low-voltage ASICs. The output voltage is pre-bias safe

and is adjustable down to 0.7V.

The MIC22705 offers a full range of sequencing and

tracking options. The Enable/Delay (EN/DLY) and Power

Good (PG) inputs allow versatile turn-on and turn-off

sequencing across multiple devices. The Ramp Control™

(RC) input allows start-up voltage tracking, either directly

or ratio-metrically.

The MIC22705 is available in a 24-pin 4mm x 4mm MLF

with a junction operating range from –40°C to +125°C.

Data sheets and support documentation are found on the

Micrel web site: www.micrel.com.

Requirements

The MIC22705YML EV requires a power supply of 2.9V to

5.5V, and a test load. Ensure that the power supply can

provide the wattage required for the chosen test load. The

load can be active (electronic load) or passive (resistor).

Additionally, monitor the Power Good output (PG) with a

multimeter or an oscilloscope if desired.

Precautions

There is no reverse input protection on this board. When

connecting supplies and signals ensure that correct

polarities are observed.

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

February 2011

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

Getting Started

1. V

Connect the V

PGND terminals. Monitor V

terminals with a voltmeter.

2. Enable/SHDN Inputs

The enable input EN is internally pulled up with a 1µA

current source. When external on/off control is desired,

install Q1 and R5, and connect a logic level control signal

to the SHDN input. When SHDN is high, the output is off,

and when SHDN is low, the output is on.

3. Monitor Outputs

Monitor the output V

across the VOUT and PGND terminals.

4. Output Load

Connect a load across the VOUT and PGND terminals.

Use an active or passive load.

5. Turn On the Power

Turn on the power supply and verify that V

Ordering Information

408

Part Number

MIC22705YML EV

Efficiency Synchronous Buck Regulator

) 944-0800 • fax + 1 (408) 474-1000 •

Supplies

1MHz, 7A Integrated Switch High-

MIC22705YML EV

Evaluation Board

supply (2.9V to 5.5V) across the PVIN and

Description

Evaluation Board for the MIC22705YML

OUT

with a scope or DVM connected

at the PVIN and PGND

http://www.micrel.com

M9999-020411-A

OUT

= 1.8V.

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