LM20146 Series

6A, Adjustable Frequency Synchronous Buck Regulator

Catalog

6A, Adjustable Frequency Synchronous Buck Regulator

Part	Voltage - Input (Min) [Min]	Package / Case	Package / Case	Number of Outputs	Synchronous Rectifier	Frequency - Switching [Max]	Frequency - Switching [Min]	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Voltage - Input (Max) [Max]	Function	Output Type	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Mounting Type	Topology	Output Configuration
Texas Instruments LM20146MHE/NOPB	2.95 V	16-PowerTSSOP	0.173 in 4.4 mm Width	1		750 kHz	260 kHz	6 A	-40 °C	125 ¯C	16-HTSSOP	5.5 V	Step-Down	Adjustable	0.8 V	4.68 V	Surface Mount	Buck	Positive
Texas Instruments LM20146MH/NOPB	2.95 V	16-PowerTSSOP	0.173 in 4.4 mm Width	1		750 kHz	260 kHz	6 A	-40 °C	125 ¯C	16-HTSSOP	5.5 V	Step-Down	Adjustable	0.8 V	4.68 V	Surface Mount	Buck	Positive

Catalog

6A, Adjustable Frequency Synchronous Buck Regulator

Key Features

• Input Voltage Range 2.95V to 5.5VAccurate Current Limit Minimizes Inductor Size97% Peak EfficiencyAdjustable Switching Frequency (250 kHz to 750 kHz)16mΩ and 20mΩ Integrated FET SwitchesStarts up into Pre-biased LoadsOutput Voltage TrackingPeak Current Mode ControlAdjustable Output Voltage Down to 0.8VAdjustable Soft-Start with External CapacitorPrecision Enable Pin with HysteresisIntegrated OVP, UVLO, Power Good and Thermal Shutdown16-Pin HTSSOP Exposed Pad PackageAll trademarks are the property of their respective owners.Input Voltage Range 2.95V to 5.5VAccurate Current Limit Minimizes Inductor Size97% Peak EfficiencyAdjustable Switching Frequency (250 kHz to 750 kHz)16mΩ and 20mΩ Integrated FET SwitchesStarts up into Pre-biased LoadsOutput Voltage TrackingPeak Current Mode ControlAdjustable Output Voltage Down to 0.8VAdjustable Soft-Start with External CapacitorPrecision Enable Pin with HysteresisIntegrated OVP, UVLO, Power Good and Thermal Shutdown16-Pin HTSSOP Exposed Pad PackageAll trademarks are the property of their respective owners.

Description

The LM20146 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 6A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suitable for a wide variety of low voltage systems. The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit. The LM20146 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20146 is pre-biased at startup it will not pull the ouput low. The frequency of this device can be adjusted from 250 kHz to 750 kHz by connecting an external resistor from the RT pin to ground. The LM20146 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks. The LM20146 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 6A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suitable for a wide variety of low voltage systems. The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit. The LM20146 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20146 is pre-biased at startup it will not pull the ouput low. The frequency of this device can be adjusted from 250 kHz to 750 kHz by connecting an external resistor from the RT pin to ground. The LM20146 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.