- 4.5V to 36V input voltage range
- 3A output current, 5.2A peak current
- 130mΩ/110MΩ integrated power MOSFET
- Synchronous rectification with 94% peak efficiency
- 1.5% feedback voltage accuracy
- Current mode control with optional compensation
- Programación de resistencias capaz de oscilar 1MHz
- The adjustable output voltage is as low as 0.8V
- Compatible with prebiased loads
- Programmable soft-start with external capacitors
- Precision enable pin with hysteresis
- OVP, UVLO input and PGOOD output
- Internal protection with peak current limit, thermal shutdown and restart
- Accurate current limiting minimizes inductor size
- Nonlinear current mode ramp compensation
- eTSSOP - 20 bare pad package
illustrate
El LM20343 es un regulador reductor síncrono con todas las funciones capaz de entregar hasta 3A de corriente de carga. External current-mode control loop compensation, consisting of only two parts, provides both high performance and ease of use. The device is optimized for operation from a 4.5V to 36V input voltage range, making it suitable for high 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 internal and externally adjustable soft-start circuit limits the inrush current at startup. Possible with integrated power good (PGOOD) circuit fault detection and power sequencing.
La frecuencia del dispositivo se puede ajustar de 250 kHz a 1.0 MHz conectando una resistencia externa al pin RT a tierra.
El LM20343 está diseñado para funcionar en una arquitectura de alimentación multiraíl. The output voltage of the device can be configured to track a higher voltage rail, using SS/TRK pins. Si la salida del LM20343 está prepolarizada cuando se enciende, no hunde la corriente y tira de la salida hacia abajo hasta que la rampa interna de arranque suave excede el pin de retroalimentación de voltaje.
El LM20343 es un paquete eTSSOP de 20 pines con una almohadilla expuesta que se puede soldar a una PCB, eliminando la necesidad de un disipador de calor voluminoso.
apply
- Simple design, load regulation, high efficiency angle, from a 4.5V to 36V bus
- High performance DSP FPGAs, ASICs and microprocessors
- Communication infrastructure, automobiles
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