Product Summary

The LM5118MHX is a wide voltage range buck-boost controller. The LM5118MHX 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 LM5118MHX 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.

Parametrics

LM5118MHX absolute maximum ratings: (1)VIN, EN, VOUT to GND: -0.3V to 76V; (2)VCC, LO, VCCX, UVLO to GND (Note 5): -0.3 to 15V; (3)HB to HS: -0.3 to 15V; (4)HO to HS: -0.3 to HB+0.3V; (5)HS to GND: -4V to 76V; (6)CSG, CS to GND: -0.3V to +0.3V; (7)Storage Temperature Range: -55°C to +150°C; (8)Junction Temperature: +150°C.

Features

LM5118MHX features: (1)Ultra-wide input voltage range from 3V to 75V; (2)Emulated peak current mode control; (3)Smooth transition between step-down and step- up modes; (4)Switching frequency programmable to 500KHz; (5)Oscillator synchronization capability; (6)Internal high voltage bias regulator; (7)Integrated high and low-side gate drivers; (8)Programmable soft-start time; (9)Ultra low shutdown current; (10)Enable input wide bandwidth error amplifier; (11)1.5% feedback reference accuracy; (12)Thermal shutdown.

Diagrams

LM5118MHX connection diagrams

Image Part No Mfg Description Data Sheet Download Pricing
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LM5118MHX/NOPB
LM5118MHX/NOPB

National Semiconductor (TI)

DC/DC Switching Controllers

Data Sheet

0-1: $7.17
1-25: $5.95
25-100: $5.41
100-250: $4.60
Image Part No Mfg Description Data Sheet Download Pricing
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LM5100
LM5100

Other


Data Sheet

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LM5100A

Other


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LM5100AM
LM5100AM

National Semiconductor (TI)

Power Driver ICs

Data Sheet

0-285: $0.88
285-570: $0.86
570-760: $0.85
760-1045: $0.83
LM5100AM/NOPB
LM5100AM/NOPB

National Semiconductor (TI)

Power Driver ICs 100V 3Amp 1/2-Bridge Driver

Data Sheet

0-1: $1.67
1-10: $1.50
10-25: $1.34
25-50: $1.26
LM5100AMR/NOPB
LM5100AMR/NOPB

National Semiconductor (TI)

Power Driver ICs 100V 3Amp 1/2-Bridge Driver

Data Sheet

0-1: $1.67
1-10: $1.50
10-25: $1.34
25-50: $1.26
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LM5100AMRX/NOPB

National Semiconductor (TI)

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Data Sheet

0-2010: $0.83
2010-2500: $0.83