MIC22405YML EV Micrel, MIC22405YML EV Datasheet

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MIC22405YML EV

Manufacturer Part Number
MIC22405YML EV
Description
Power Management IC Development Tools 4A Integrated Switch Synchronous Buck Regulator w/ Pre-Bias - Evaluation Board
Manufacturer
Micrel
Type
DC/DC Converters, Regulators & Controllersr
Datasheet

Specifications of MIC22405YML EV

Product
Evaluation Boards
Tool Is For Evaluation Of
MIC22405
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
4 A
For Use With
MIC22405
General Description
The Micrel MIC22405 is a high-efficiency, 4A, integrated
switch, synchronous buck (step-down) regulator. The
MIC22405 achieves more than 95% efficiency and
switches at 1MHz. The ultra-high speed control loop keeps
the output voltage within regulation even under 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 MIC22405 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 MIC22405 is available in a 20-pin 3mm 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 MIC22405YML 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. While
connecting supplies and signals ensure that correct
polarities are observed.
Ramp Control is a trademark of Micrel, Inc.
July 2011
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
®
Getting Started
1. V
Connect the V
GND terminals. Monitor V
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 GND terminals.
4. Output Load
Connect a load across the VOUT and GND 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
MIC22405YML EV
) 944-0800 • fax + 1 (408) 474-1000 •
Frequency Programmable upto 4MHz
IN
4A Integrated Switch High-Efficiency
Synchronous Buck Regulator with
Supplies
MIC22405YML EV
Evaluation Board
IN
supply (2.9V to 5.5V) across the VIN and
Description
Evaluation Board for the MIC22405YML
OUT
with a scope or DVM connected
IN
at the VIN and GND terminals
http://www.micrel.com
M9999-071911-B
OUT
= 1.8V.

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MIC22405YML EV Summary of contents

Page 1

... Data sheets and support documentation are found on the Micrel web site: www.micrel.com. Requirements The MIC22405YML 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). ...

Page 2

... Micrel, Inc. Evaluation Board Features Enable/Delay (EN/DLY) Enable/Delay allows delayed turn on of the MIC22405. Install a capacitor in location C4 to increase the start-up delay of the MIC22405. Shutdown Input (SHDN) SHDN allows enable/disable of the MIC22405 with an external logic signal. To activate the shutdown feature install components into the locations labeled Q1 and R5 (component recommendations are listed in the Bill of Materials later in this document) ...

Page 3

... Micrel, Inc. Typical Characteristics Efficiency (V vs. Output Current 100 3. OUTPUT CURRENT (A) July 2011 = 3.3V) IN 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 0.8V 0. MIC22405YML Evaluation Board IC Power Dissipation (V = 3.3V) IN vs. Output Current 1.25 2.5V 1.8V 1.00 1.5V 1.2V 1.0V 0.75 0.9V 0.8V 0.7V 0.50 0. 3. OUTPUT CURRENT (A) M9999-071911-B 4 ...

Page 4

... Micrel, Inc. Functional Characteristics Efficiency (V vs. Output Current 100 3. OUTPUT CURRENT (A) July 2011 = 3.3V) IN 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 0.8V 0. MIC22405YML Evaluation Board IC Power Dissipation (V = 3.3V) IN vs. Output Current 1.25 2.5V 1.8V 1.00 1.5V 1.2V 1.0V 0.75 0.9V 0.8V 0.7V 0.50 0. 3. OUTPUT CURRENT (A) M9999-071911-B 4 ...

Page 5

... TDK Capacitor, 1nF, 10V, COG, Size 0603 (1) AVX (3) Murata (2) TDK Capacitor, 470pF, 50V, X7R, Size 0603 (1) AVX (3) Murata (2) Capacitor, 39pF, 50V, Size 0603 TDK (1) AVX (3) Murata (2) Capacitor, 390pF, 50V, Size 0603 TDK (1) AVX 5 MIC22405YML Evaluation Board Qty M9999-071911-B ...

Page 6

... Resistor, 20k, 1%, Size 0603 (4) Vishay Resistor, 47.5k, 1%, Size 0603 (4) Vishay Resistor, 100k, 1%, Size 0603 (4) Vishay Resistor, 2.2Ω, 1%, Size 0603 (4) Vishay Resistor, 49.9Ω, 1%, Size 0603 (4) Vishay Open (7) Micrel Integrated 4A Synchronous Buck Regulator 6 MIC22405YML Evaluation Board Qty M9999-071911-B ...

Page 7

... Micrel, Inc. Evaluation Board PCB Layout July 2011 MIC22405 Evaluation Board Top Layer MIC22405 Evaluation Board Top Silk 7 MIC22405YML Evaluation Board M9999-071911-B ...

Page 8

... Micrel, Inc. Evaluation Board PCB Layout (Continued) July 2011 MIC22405 Evaluation Board Mid-Layer 1 (Ground Plane) MIC22405 Evaluation Board Mid-Layer 2 8 MIC22405YML Evaluation Board M9999-071911-B ...

Page 9

... Micrel, Inc. Evaluation Board PCB Layout (Continued) July 2011 MIC22405 Evaluation Board Bottom Layer MIC22405 Evaluation Board Bottom Silk 9 MIC22405YML Evaluation Board M9999-071911-B ...

Page 10

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully July 2011 indemnify Micrel for any damages resulting from such use or sale. © 2010 Micrel, Incorporated. 10 MIC22405YML Evaluation Board http://www.micrel.com M9999-071911-B nt ...

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