LM5176-Q1 55-V wide VIN synchronous 4-switch buck-boost controller | TI.com

LM5176-Q1 (ACTIVE) 55-V wide VIN synchronous 4-switch buck-boost controller

 

Description

The LM5176-Q1 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5176-Q1 operates over a wide input voltage range of 4.2 V to 55 V (60 V absolute maximum) to support a variety of applications.

The LM5176-Q1 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5176-Q1 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.

Features

  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 1: -40°C to 125°C TA
  • Single Inductor Buck-Boost Controller for Step-Up/Step-Down DC/DC Conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V Maximum)
  • Flexible VOUT: 0.8 V to 55 V
  • VOUT Short Protection
  • High Efficiency Buck-Boost Transition
  • Adjustable Switching Frequency
  • Optional Frequency Sync and Dithering
  • Integrated 2-A MOSFET Gate Drivers
  • Cycle-by-Cycle Current Limit and Optional Hiccup
  • Optional Input or Output Average Current Limiting
  • Programmable Input UVLO and Soft-Start
  • Power Good and Output Overvoltage Protection
  • Available in HTSSOP-28 Package
  • Create a Custom Design Using the LM5176-Q1 with the WEBENCH Power Designer

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WEBENCH® Designer LM5176-Q1

  Min   Max Range
Vin  V 2.5 to 55.0V
Vout  V 0.8 to 55V
Iout  A ≤ 25A
Ambient Temp  °C -40 to 150°C

Parametrics

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Part number Order Topology Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Duty cycle (Max) (%) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Iout (Max) (A) Operating temperature range (C) Rating Package Group
LM5176-Q1 Order now Buck-Boost     4.2     55     0.8     55     100     100     600     2     Adjustable Current Limit
Enable
Frequency Synchronization
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
  -40 to 125     Automotive     HTSSOP | 28    
LM25118-Q1 Order now Buck-Boost     3     42     1.23     38     98     50     500     4.5     Enable
Frequency Synchronization    
10     -40 to 125     Automotive     HTSSOP | 20    
LM34936-Q1 Order now Buck-Boost     4.2     30     0.8     30     100     100     600     2     Adjustable Current Limit
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
  -40 to 125     Automotive     HTSSOP | 28    
LM5118-Q1 Order now Buck-Boost     3     75     1.23     70     98     50     500     4.5     Enable
Frequency Synchronization    
10     -40 to 125     Automotive     HTSSOP | 20    
LM5170-Q1 Order now Boost
Buck    
4     80     4     80     99     50     500     1     Adjustable Current Limit
Adjustable UVLO
Enable
Frequency Synchronization
Light Load Efficiency
Load Disconnect
Multiple Outputs
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
50     -40 to 150     Automotive     HTQFP | 48    
LM5175-Q1 Order now Buck-Boost     3.5     42     0.8     55     100     100     600     1.65     Adjustable Current Limit
Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
20