MIC5281YMME EV Micrel, MIC5281YMME EV Datasheet

MIC5281YMME EV

Manufacturer Part Number

MIC5281YMME EV

Description

Power Management IC Development Tools 120V/25mA Low Iq, High PSRR LDO - Evaluation Board

Manufacturer

Micrel

Type

LDO Controllers & Regulatorsr

Datasheet

1.MIC5281YMME_EV.pdf (7 pages)

Specifications of MIC5281YMME EV

Product

Evaluation Boards

Tool Is For Evaluation Of

MIC5281

Input Voltage

6 V to 120 V

Output Voltage

Adjustable, 3.3 V, 5 V

Description/function

Evaluation Board

Maximum Operating Temperature

+ 125 C

Minimum Operating Temperature

- 40 C

Output Current

25 mA

For Use With

MIC5281

Current page: 1 of 7
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General Description

The MIC5281 is a high-performance, low-dropout linear

regulator featuring a very-low noise output and a very-wide

input voltage range (6V to 120V). The MIC5281 supplies

an output current of up to 25mA and is offered in both fixed

output voltage (3.3V/5.0V) and adjustable output voltage

(1.27V to 5.5V) options.

Ideal for high input voltage applications such as industrial

and telecom, the MIC5281 offers ±3% initial accuracy,

extremely-high power supply rejection ratio (>90db) and

ultra-low quiescent current (6µA typical). The MIC5281 is

optimized for line transient response, which makes it ideal

for applications operating in harsh environments.

The MIC5281 operates over the −40ºC to +125ºC

temperature range and is available in the lead-free, RoHS-

compliant 8-pin ePad MSOP and 8-pin MSOP packages.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Requirements

The MIC5281 evaluation board requires a single power

supply to provide V

to deliver a minimum of 6V more than 25mA capability.

The output load can either be an active or passive load.

Precautions

The evaluation board does not have reverse polarity

protection, thus applying a negative voltage to the V

terminal may damage the device. In addition, the

maximum V

board is 120V. Exceeding 120V on V

damage the device.

October 2012

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

operating voltage of the MIC5281 evaluation

. The V

power supply must be able

could permanently

Getting Started

1. Connect an external supply to V

2. Connect the load to the V

3. Enable the MIC5281. The EN pin is provided on the

Ordering Information

Part Number

MIC5281YMME EV

desired input voltage to the V

of the evaluation board, paying careful attention to

polarity and supply voltage. An ammeter may be

placed between the input supply and the V

to the evaluation board. Ensure that the supply voltage

is monitored at the V

power lead resistance can reduce the voltage supplied

to the input.

The load can be either passive (resistive) or active (as

in an electronic load). An ammeter can be placed

between the load and the V

the output voltage is monitored at the V

The V

resistors. See “Output Voltage” section.

evaluation board with a 10k pull-up resistor. The

output of the MIC5281 may be turned off by shorting

the EN pin to ground. An external connection on the

board provides easy access to the enable pin.

Removing the pull-up resistor and leaving the EN pin

floating will cause the regulator to operate in an

indeterminate state.

OUT

120V

Evaluation Board

can be adjusted by changing the feedback

High-PSRR LDOs

, 25mA, Ultra-Low I

MIC5281

Evaluation board featuring the

25mA MIC5281YMME with

adjustable output

Description

terminal. The ammeter and/or

OUT

http://www.micrel.com

and ground terminals.

and ground terminals

terminal. Ensure that

M9999-101112-A

terminal. Apply

OUT

terminal.

terminal

Related parts for MIC5281YMME EV

MIC5281YMME EV Summary of contents

Page 1

... Removing the pull-up resistor and leaving the EN pin floating will cause the regulator to operate in an indeterminate state. Ordering Information IN Part Number could permanently IN MIC5281YMME EV MIC5281 Evaluation Board 120V , 25mA, Ultra-Low I IN High-PSRR LDOs terminal. Apply IN ...

Page 2

... Micrel, Inc. Applications Information Output Voltage The output voltage on the MIC5281YMME evaluation board is adjustable. The output is set by connecting one of the feedback resistors into the circuit via a jumper short. The output voltage can be programmed to 1.8V, 2.5V, 3.3V, or 5V. The output voltage for the MIC5281 evaluation board is set at the factory for a 5V output. In ...

Page 3

... Micrel, Inc. Evaluation Board Schematic October 2012 MIC5281YMME Evaluation Board (J1 is for test purposes only) 3 MIC5281YMME Evaluation Board M9999-101112-A ...

Page 4

... Film Resistor, Size 0603, 1% Vishay 18.2kΩ Film Resistor, Size 0603, 1% Vishay 30.1kΩ Film Resistor, Size 0603, 1% Vishay 69.8kΩ Film Resistor, Size 0603, 1% (5) Micrel, Inc. 120V , 25mA, Ultra-Low MIC5281YMME Evaluation Board , High-PSRR LDOs Q M9999-101112-A Qty DNP DNP ...

Page 5

... Micrel, Inc. Evaluation Board PCB Layout October 2012 MIC5281YMME Evaluation Board – Top Silkscreen Layer MIC5281YMME Evaluation Board – Top Layer 5 MIC5281YMME Evaluation Board M9999-101112-A ...

Page 6

... Micrel, Inc. Evaluation Board PCB Layout (Continued) October 2012 MIC5281YMME Evaluation Board – Bottom Layer MIC5281YMME Evaluation Board – Bottom Silkscreen 6 MIC5281YMME Evaluation Board M9999-101112-A ...

Page 7

... 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 October 2012 indemnify Micrel for any damages resulting from such use or sale. © 2011 Micrel, Incorporated. 7 MIC5281YMME Evaluation Board http://www.micrel.com M9999-101112-A nt ...

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