MIC2297-15YML Micrel Semiconductor, MIC2297-15YML Datasheet

MIC2297-15YML

Manufacturer Part Number

MIC2297-15YML

Description

Manufacturer

Micrel Semiconductor

Datasheets

1.MIC2297-15YML.pdf (11 pages)

2.MIC2297-15YML.pdf (12 pages)

3.MIC2297-15YML.pdf (11 pages)

Specifications of MIC2297-15YML

Date_code

05+

Packing_info

MLF2525D-10L

Current page: 1 of 12
Download datasheet (274Kb)

General Description

The MIC2297 is a 600KHz PWM boost-switching regulator

that is optimized for driving 6-10 series white LEDs. With

its internal 40V switch and a guaranteed switch current of

1.2A, the MIC2297 easily drives a string of 10 white LEDs

in series at 20mA, ensuring a high level of brightness and

eliminating several ballast resistors.

The MIC2297 implements constant frequency 600KHz

PWM control. The high frequency PWM operation saves

board space by reducing external component sizes. The

added benefit of the constant frequency PWM operation is

much lower noise and input ripple injected back to the

battery source than with variable frequency topologies.

To optimize efficiency, the feedback voltage is set to

200mV. This reduced voltage reduces the power

dissipation in the current set resistor, and allows the lowest

total output voltage, hence minimal current draw from the

battery.

The MIC2297 is available with output over-voltage

protection that protects the IC and external components in

case of open LED conditions.

The MIC2297 is available in low profile small size 2.5mm x

2.5mm MLF™-10L package. The MIC2297 has a junction

temperature range of –40°C to +125°C.

___________________________________________________________________________________________________________

Typical Applications

3V to 4.2V

MLF and MicroLeadFrame is a trademark of Amkor Technology

May 2005

1-Cell

Li I on

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

1µF

10 Series LED Driver with Output OVP

1µF

VIN

6.8µH-22µH

AGN D

BRT

REF

MIC2297

-42BM L

PGND

COMP

OVP

0.1µF

0.47µF

/50V

3V to 4.2V

1-Ce ll

Li I on

Features

Applications

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

•

10 Series LED Driver with PWM Brightness Control

1µF

2.5V to 10V input voltage range

Output voltage up to 40V

1.2A switch current

600KHz PWM operation

Trimmed 200mV feedback voltage

Output over voltage protection (fixed or adjustable)

PWM Brightness Control

DAC Brightness Control

<1% line regulation

1µA shutdown current

Over temperature protection

UVLO

2.5mm x 2.5mm MLF™-10L package

–40

PDAs

GPS systems

Smart phones

Mini PCs

Digital cameras

IP phones

LED flashlights

40V PWM Boost Regulator

PWM

C to +125

1µF

White LED Driver

VIN

6.8µH-22µH

AGND

BRT

REF

MIC2297

C junction temperature range

MIC2297

-42BM L

PGND

COMP

OVP

0.1µF

(408) 955-1690

M9999-050305

0.47µF

/50V

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