Texas Instruments LM5175 60V 4-Switch Synchronous Buck-Boost Controller
The LM5175 from Texas Instruments is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. It boasts a wide operating input voltage range of 3.5 V to 42 V (60 V maximum) to support a variety of applications.
- Single Inductor Buck-Boost Controller for Step Up/Step-Down DC/DC Conversion
- Wide VIN Range: 3.5 V to 42 V, 60 V Maximum
- Flexible VOUT Range: 0.8 V to 55 V
- VOUT Short Protection
- High Efficiency Buck-Boost Transition
Product Description
The LM5175 from Texas Instruments is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. It boasts a wide operating input voltage range of 3.5 V to 42 V (60 V maximum) to support a variety of applications.
Current-mode control is used 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 synchronised to an external clock signal.
The LM5175 offers a programmable soft-start function and protection measures including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown.
Other features include selectable Continuous Conduction Mode (CCM) or Discontinuous Conduction Mode (DCM) operation, optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.
Typical applications for the LM5175 include Automotive Start-Stop Systems; Backup Battery and Supercapacitor Charging; Industrial PC Power Supplies; USB Power Delivery and LED Lighting.