RoHS Compliance Information	Size in Kbytes	Date
LM5118/LM5118Q Wide Voltage Range Buck-Boost Controller	524 Kbytes	17-Jul-09	Download

Part Number

Package

Factory Lead Time

Models

Samples & Electronic Orders

Budgetary Pricing

Std Pack Size

Package Marking Format

Type

Pins

Spec.

MSL Rating

Peak Reflow

RoHS Report

CAD Symbols

Weeks

Qty

Qty

$US each

LM5118MH

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$2.92

rail of 73

NSUZXYTT LM5118 MH

6 weeks

N/A

LM5118Q1MH

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$3.65

rail of 73

NSUZXYTT LM5118 Q1MH

6 weeks

N/A

LM5118MHX

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$2.92

reel of 2500

NSUZXYTT LM5118 MH

6 weeks

N/A

LM5118Q1MHX

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$3.65

reel of 2500

NSUZXYTT LM5118 Q1MH

6 weeks

N/A

LM5118EVAL

Evaluation Board for the LM5118

Full production

N/A

1+

$70.00

1

-

8 weeks

N/A

General Description

The LM5118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high performance, cost efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage making it especially suitable for automotive applications. The LM5118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy to use controller includes drivers for the high side buck MOSFET and the low side boost MOSFET. The regulator’s control method is based upon current mode control utilizing an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

Reliability Metrics

Design Tools

Title	Size in Kbytes	Date
LM5118 Quick Start Component Calculator	247 Kbytes	23-Jun-2008	View

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Application Notes

Title	Size in Kbytes	Date
AN-1819: Application Note 1819 LM5118 Evaluation Board	390 Kbytes	30-Apr-08	Download

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