Microchip MIC5375 Manual

Microchip Ikke kategoriseret MIC5375

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Side 1/6

MIC5375/6 Evaluation Board

High Performance Low Dropout

150mA 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

January 2009 M9999-012109-A

General Description

The MIC5375/6 is a low quiescent current, low dropout

regulator designed for optimal performance in a small

space. When the MIC5376 is disabled an internal resistive

load is automatically applied to the output to discharge the

output capacitor. The MIC5375/6 is capable of sourcing

150mA of output current while only consuming 29µA of

operating current. This high performance LDO offers fast

transient response and good PSRR while consuming a

minimum of current.

Ideal for battery operated applications; the MIC5375/6

offers low dropout voltage 120mV typically @ 150mA. The

MIC5375/6 can also be put into a zero-off-mode current

state, drawing virtually no current when disabled.

An input capacitor may be required when the power supply

is more than 4-inches from the device. The evaluation

board includes an input capacitor of 10μF to compensate

for long inductive test leads.

Requirements

The MIC5375/6 evaluation board requires an input power

supply of 400mA with a voltage range of 2.3V to 5.5V to

the VIN.

Precautions

The evaluation board does not have reverse polarity

protection. Applying a negative voltage to the VIN terminal

may damage the device.

Getting Started

1. Connect an external supply to VIN. Apply desired

input voltage to the VIN (J1) and ground terminal

(J2) of the evaluation board, paying careful

attention to polarity and supply voltage. An

ammeter may be placed between the input supply

and the VIN terminal to the evaluation board.

Ammeter and/or power lead resistance can reduce

the voltage supplied to the input.

Ensure that the supply voltage is monitored at VIN

terminal. There is 10uF capacitor connected from

VIN (J1) to GND (J2).

2. Enable/Disable the MIC5375/6. The YMT (1x1

TMLF) evaluation board is provided with a 100kΩ

pull up resistor on enable pin (EN) to VIN, where as

the YC5 (SC-70) evaluation board is provided with

a 100kΩ pull down resistor from the enable pin

(EN) to GND. Simply jumper the enable pin (EN)

to VIN to enable the regulator output, or to GND to

disable the output. The enable pin must be either

pulled high or low. Removing the pull up resistor

and leaving the EN pin floating will cause the

regulator to operate in an indeterminate state.

3. Connect the loads to the VOUT terminal (J3) and

ground terminal (J2). The load can be either a

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

sure to monitor the output voltage at the VOUT (J3)

terminals. The evaluation board has a 1uF

capacitor connected from VOUT (J3) to GND (J2).

Ordering Information

Part Number Description

MIC5375-2.8YMT High Performance Low Dropout 150mA LDO,

1x1 TMLF,VOUT = 2.8V Evaluation Board

MIC5375-2.8YC5 High Performance Low Dropout 150mA LDO,

SC-70, VOUT = 2.8V Evaluation Board

MIC5376-2.8YMT High Performance Low Dropout 150mA LDO,

1x1 TMLF, VOUT = 2.8V Evaluation Board

MIC5376-2.8YC5 High Performance Low Dropout 150mA LDO,

SC-70,VOUT = 2.8V Evaluation Board

Micrel, Inc. MIC5375/6 Evaluation Board

January 2009 2 M9999-012109-A

Evaluation Board Schematic

VIN VOUT

U1 MIC5375/6-xxYMT

GND C2

1µF

10V

VOUT

GND

10µF

6.3V

2 3

100k

VIN

GND

Bill of Materials

Item Part Number Manufacturer Description Qty.

GRM155R61A105KE15D Murata(1)

C1005X5R1A105KT TDK(2)

CV05X5R105K10AH AVX/Kyocera(3)

Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2

C1 C1608X5R0J106Z TDK(2) Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603

R1 CRCW0603100KFKEA Vishay(4) Resistor, 100kΩ, 1%, 1/16W, Size 0603 1

U1 MIC5375/6-xxYMT Micrel, Inc.(5) High Performance 150mA LDO, 4-Pin 1mm x 1mm

Thin MLF®

Notes:

1. Murata: www.murata.com

2. TDK: www.tdk.com

3. AVX/Kyocera: www.avx.com

4. Vishay: www.vishay.com

5. Micrel, Inc.: www.micrel.com

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	MIC5375

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