Microchip MIC5322 Manual

Microchip Ikke kategoriseret MIC5322

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Side 1/4

MIC5322 Evaluation Board

High Performance Dual 150mA

µCap ULDO™

ULDO is a trademark of Micrel, Inc.

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

March 2008 M9999-032708-A

General Description

The MIC5322 is a tiny dual output, ultra low dropout linear

regulator. The MIC5322 regulator provides a single active

low enable pin for both outputs as well as a bypass pin to

reduce the output voltage noise. The MIC5322 provides

two high performance 150mA LDOs in a tiny 6 pin 1.6mm

x 1.6mm Thin MLF

package.

The MIC5322 dual Ultra Low Dropout (ULDO™) linear

regulator is easy to use. A small capacitance of only 1µF is

required for the input voltage and each of the outputs to

maintain stability. A bypass capacitor of 0.01µF is included

on the evaluation board to reduce the output voltage noise

and improve the Power Supply Rejection Ratio (PSRR).

The evaluation board includes an input capacitor of 10µF

to compensate for long inductive test leads.

Requirements

The MIC5322 evaluation board requires an input power

source that is able to deliver at least 300mA at a voltage

within the range of 2.3V to 5.5V. The output load can be

either active or passive.

Precautions

The evaluation board does not have reverse polarity

protection. Applying a negative voltage to the V

terminal

may damage the device.

The evaluation board is tailored for a Li-Ion range input

supply voltage. It should not exceed 5.5V on the input.

Getting Started

1. Connect an external supply to V

. Apply the

desired input voltage to the V

(J1) and ground

terminal (J2) of the evaluation board, paying

careful attention to polarity and supply voltage

(2.3V ≤ V

≤ 5.5V). An ammeter may be placed

between the input supply and the V

terminal to

the evaluation board to accurately monitor the

input current. The ammeter and/or power lead

resistance can reduce the voltage supplied to the

input so monitor the supply voltage at the V

terminal.

2. Enable/Disable the MIC5322. The evaluation

board is set up for “Default Disable” on both

outputs with a 10k pull up resistor on the enable

pin (/EN) to V

. To enable both outputs, simply

jumper the /EN terminal (J7) to the GND terminal

(J2 or J5). The enable pin must be either pulled

high or low for proper operation. Removing the pull

up resistors and leaving the pin floating will cause

the regulators to operate in an indeterminate state.

3. Connect the loads to the V

OUT

terminals (J4 for

LDO1, J6 for LDO2) and ground terminal (J5).

The load can be either a passive (resistor) or

active (electronic load). Be sure to monitor the

output voltage at the V

OUT

(J4 and J6) terminals.

Ordering Information

Part Number Description

MIC5322-XXYMT EV

Evaluation board with the 150mA

Dual ULDO™ device with bypass

and active low enable

Micrel, Inc. MIC5322 Evaluation Board

March 2008

2 M9999-032708-A

Evaluation Board Schematic

VIN

GND

VOUT1

MIC5322-xxYMT

VOUT2

BYP

10k

VIN

10µF

1µF

VIN

BYP

/EN1

GND

VOUT1

GND

VOUT2

0.01µF

Bill of Materials

Item Part Number Manufacturer Description Qty

C1 C1608X5R0J106M TDK

(1)

Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603 1

C2 VJ0603Y103KXQ Vishay

(2)

Capacitor, 0.01µF Ceramic, 10V, X7R, Size 0603 1

C3, C4 C1608X5R0J105M TDK

(1)

Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 2

R1 OPEN Do not populate

R2 CRCW06031002FKEYE3 Vishay

(2)

Resistor, 10kΩ, 1%, 1/16W, Size 0603 1

U1 MIC5322-XXYMT Micrel

(3)

UCAP LDO, Dual 150mA, Size 1.6mm x 1.6mm Thin MLF

Notes:

1. TDK: www.tdk.com

2. Vishay: www.vishay.com

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

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	MIC5322

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