Microchip MIC5385 Handleiding

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MIC5385 Evaluation Board

Ultra-Small Triple 150mA Output LDO

MLF and MicroLeadFrame are registered trademarks of 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

General Description

The MIC5385 is an advanced, triple-output, low-noise LDO

for powering general purpose portable devices. The

MIC5385 provides three independently-enabled, high-

performance, 150mA LDOs in an ultra-small 2mm x 2mm

Thin MLF® package while using only four external

components.

Ideal for battery-powered applications, the MIC5385 offers

low dropout voltage of 180mV at 150mA and low ground

current (typically 32µA per LDO). It can also be put into a

zero-off-mode current state, drawing virtually no current

when disabled.

An input capacitor is required when the power supply is

more than four inches from the device. The evaluation

board includes an input capacitor of 10µF to compensate

for long inductive test leads.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Requirements

The MIC5385 evaluation board requires an input power

supply that is capable of delivering a minimum 600mA at a

voltage range of 2.5V to 5.5V. The output load can be

either active or passive.

Precautions

The MIC5385 evaluation board does not have reverse

polarity protection. Applying a negative voltage to the VIN

terminal may damage the device.

Getting Started

•Connect an External Supply to VIN. Apply the desired

input voltage to the VIN (J1) and ground (J2) terminal of

the evaluation board, paying careful attention to polarity

and supply voltage (2.5V ≤ VIN≤ 5.5V). An ammeter can

be placed between the input supply and the VIN terminal

of the evaluation board. Ensure that the supply voltage

is monitored at the VIN terminal. The ammeter and/or

power-lead resistance can reduce the voltage supplied

to the input.

•Enable/Disable the MIC5385. To enable the MIC5385

jumper, the enable terminal (J5 for LDO1, J4 for LDO2,

and J3 for LDO3) to VIN

. To disable the output, simply

remove the jumper from the EN terminal. The enable pin

must be either pulled high or low. Leaving the pin

floating will cause the regulator to operate in an

indeterminate state. The evaluation board is supplied

with 100KΩ pull-down resistors for default off state.

•Connect the Load. Connect the load to the VOUT

Terminals (J7 for LDO1, J8 for LDO2 and J6 for LDO3)

and Ground Terminal (J9, J10). The load can be either a

passive (resistor) or active (electronic load). Be sure to

monitor the output voltage at the VOUT (J6, J7 and J8)

terminals.

Ordering Information

April 2010 M9999-041610-A

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Part Number Description

MIC5385-SGFYMT EV Triple-Output LDO Evaluation Board.

VOUT1 =3.3V, VOUT2 =1.8V, VOUT3 =1.5V

Product specificaties