- The input voltage range is 2.95V to 5.5V
- Accurate current limiting minimizes inductor size
- 97% peak efficiency
- Adjustable switching frequency (250 kHz to 750 kHz)
- 16mΩ and 20MΩ integrated FET switches
- Boot into a prebiased load
- Output voltage tracking
- Peak current mode control
- The adjustable output voltage is as low as 0.8V
- Adjustable soft-start with external capacitors
- Precision enable pin with hysteresis
- Integrated overvoltage protection, undervoltage lockout, power good, and thermal shutdown
- eTSSOP - 16 bare pad package
illustrate
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 and stabilized with almost any type of output capacitor. In most cases, compensation devices, which require only two external components, provide maximum flexibility and ease of use. The device is optimized for a wide range of operating input voltages ranging from 2.95V to 5.5V for low voltage systems.
The device features internal overvoltage protection (OVP) and overcurrent protection (OCP) circuitry to improve system reliability. An enable pin and integrated undervoltage lockout allow a precision device to be tightly controlled and sequencing turned on. Both a fixed internally and externally adjustable soft-start circuit start-up inrush current is limited. Possible with integrated power good circuit fault detection and power sequencing.
LM20146 is working on a multirail power architecture design. The output voltage of the device can be configured to track a higher voltage rail, using SS/TRK pins. If the LM20146 output prebias is on, it does not pull the output low.
The frequency of the device can be adjusted from 250 kHz to 750 kHz by connecting an external resistor to the RT pin to ground.
LM20146 is available in a 16-pin eTSSOP package with exposed pads that can be soldered to the PCB, eliminating the need for bulky heat sinks.
apply
- The design is simple, and the load is regulated from a high efficiency angle from a 5V or 3.3V bus
- High performance DSP FPGAs, ASICs and microprocessors
- Broadband, network and optical communications infrastructure
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