- The input voltage range is 2.95V to 5.5V
- Accurate current limiting minimizes inductor size
- The switching frequency of 96 MHz is 1.5% efficiency
- 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 pins and hysteresis
- Integrated OVP, UVLO, power good and thermal shutdown
- eTSSOP - 16 bare pad package
illustrate
The LM20123 is a full-featured 1.5 MHz synchronous buck regulator that provides up to 3A of continuous output current capability. The current-mode control loop is compensated and stable with almost any type of output capacitor. In most cases, compensation devices require only two external components, providing maximum flexibility and ease of use. The device is optimized to operate over an input voltage range of 2.95V to 5.5V, making it inhospitable to a low voltage system.
The device features overvoltage protection (OVP) and overcurrent protection (OCP) inside the circuit to improve system reliability. A high-precision enable pin and integrated UVLO allow the device to move to tight control and sequencing. The start-up inrush current limit is both an internally fixed and externally adjustable soft-start circuit. Fault detection and power sequencing are possible integrated power good circuits.
The LM20123 is designed to work well in multi-rail power structures. The output voltage of the device can be set to higher voltage rail tracking using SS/TRK pins. If the output of the LM20123 is prebiased at startup, no current is drawn and the output is pulled low until the internal soft-start ramp exceeds the voltage at the feedback pin.
The LM20123 is available in a 16-pin eTSSOP package with an exposed pad that can be soldered to a printed circuit board, eliminating the need for a bulky heat sink.
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- Simple design, high efficiency load regulation point from 5V or 3.3V bus
- High-performance DSPs, FPGAs, ASICs and microprocessors
- Broadband, optical communication networks and infrastructure
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