- The input voltage range is 2.95V to 5.5V
- Accurate current limiting minimizes inductor size
- 96% peak efficiency at 1.0 MHz switching frequency
- Frequency synchronous output
- 32mΩ integrated FET switch
- 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
The LM20154 is a full-featured 1 MHz synchronous buck regulator capable of delivering up to 4A 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. Optimized operation from 2.95V to 5.5V input voltage range, making it suitable for a wide range of devices in low voltage systems.
The device features internal overvoltage protection (OVP) and overcurrent protection (OCP) circuitry to improve system reliability. A high-precision enable pin and integrated undervoltage lockout allow for tight control and sequencing of the device. 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.
The LM20154 has an open-drain SYNCOUT pin that provides an external clock to match the switching frequency of the device, but with 180 degree steer.
The LM20154 is designed to work on a multirail power architecture. The output voltage of the device can be configured to track a higher voltage rail, using SS/TRK pins. If the output prebias of the LM20154 is turned on, it does not sink current and pull the output low until the internal soft-start ramp exceeds the voltage feedback pin.
The LM20154 is available in a 16-pin eTSSOP package with an exposed pad that can be soldered to a 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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