LM2623-Q1

+ C1

22 µF

R3

150 k

Ÿ

C3

4.7pF

FREQ

PGND

SGND

EN

BOOT

FB

C2

100 µF

tantalum

RF1

300 k

Ÿ

RF2

100 k

Ÿ

D1

3 A

SW

1 µF

3.3 V

2,3

9

6

12,13

5

10

4

11

NC

1,7,8,14

L1

4.7 µH

Copyright © 2017, Texas Instruments Incorporated

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM2623-Q1

SNVSAO5 – OCTOBER 2017

LM2623-Q1 Automotive Gated-Oscillator-Based DC-DC Boost Converter

1

1 Features

1

•

AEC-Q100 Qualified for Automotive Applications:

–

Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature

–

Device HBM ESD Classification Level 2

–

Device CDM ESD Classification Level C4A

•

Good Efficiency Over a Very Wide Load Range

•

Very Low Output Voltage Ripple

•

Up to 2-MHz Switching Frequency

•

0.9-V to 14-V Operating Voltage

•

1.1-V Start-Up Voltage

•

1.24-V to 14-V Adjustable Output Voltage

•

0.17-Ω Internal MOSFET

•

Up to 90% Regulator Efficiency

•

Supply)

•

•

4-mm × 4-mm Thermally Enhanced WSON

Package Option

2 Applications

•

Automotive Camera

•

Automotive Radar

•

Automotive GPS

•

Flash Memory Programming

•

White-LED Drive

3 Description

The

LM2623-Q1

is

a

high-efficiency,

general-

purpose, step-up DC-DC switching regulator for

automotive systems. The device accepts an input

voltage between 0.9 V and 14 V and converts it into a

regulated output voltage between 1.24 V and 14 V.

In order to adapt to a number of applications, the

LM2623-Q1 allows the designer to program the

output voltage, the operating frequency (300 kHz to

2 MHz), and duty cycle (17% to 90%) to optimize

performance. The selected values can be fixed or can

vary with input voltage or input-to-output voltage ratio.

The LM2623-Q1 uses a very simple, on/off regulation

mode to produce good efficiency and stable operation

over a wide operating range. The device normally

regulates by skipping switching cycles when it

reaches

the

regulation

limit

(pulse

frequency

modulation (PFM)).

Refer to Non-Linear Effect and Choosing the Correct

C3 Capacitor to resolve any design challenges before

board design is finalized.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM2623-Q1

WSON (14)

4.00 mm × 4.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application