LMR14010ADDCR

The LMR14010A is a PWM DC-to-DC buck (stepdown) regulator. With a wide input range from 4 V to 40 V, it is suitable for a wide range of applications from industrial to automotive. An ultra-low 1-μA shutdown current prolongs battery life. Operating frequency is fixed at 0.7 MHz, allowing the use of small external components while minimizing output ripple voltage. Soft-start and compensation circuits are implemented internally, limiting the number of external components. The LMR14010A is optimized for up to 1-A load current. It has a 0.765-V nominal feedback voltage. The device has built-in protection features such as pulse-by-pulse current limit, thermal sensing and shutdown due to excessive power dissipation. The LMR14010A is available in a low profile TSOT-6L package (2.9 mm×1.6 mm×0.85 mm). The LMR14010A device is a 40-V, 1-A step-down (buck) regulator. The buck regulator has a very low-quiescent current during the light load to prolong the battery life. The LMR14010A improves performance during line and load transients by implementing a constant frequency, current mode control which reduces output capacitance and simplifies frequency compensation design. The LMR14010A reduces the external component count by integrating the boot recharge diode. The bias voltage for the integrated high-side MOSFET is supplied by a capacitor on the CB to SW pin. The boot capacitor voltage is monitored by an UVLO circuit and will turn the high side MOSFET off when the boot voltage falls below a preset threshold. The LMR14010A can operate at high duty cycles because of the boot UVLO and small refresh FET. The output voltage can be stepped down to as low as the 0.765-V reference. Internal soft start is featured to minimize inrush currents.

Applications

• Smart Meters
• Appliances
• Elevators and Escalators
• Cameras

Key features

• Input Voltage Range: 4 V to 40 V with Transient Protection to 45 V
• 0.7-MHz Switching Frequency
• Ultra-High Efficiency at Light Load with Ecomode™
• Low Dropout Operation
• Output Current up to 1 A
• Precision Enable Input
• Overcurrent Protection
• Internal Compensation
• Internal Soft-Start
• Small Overall Solution Size (TSOT-6L Package)
• Create a Custom Design Using the LMR14010A With the WEBENCH Power Designer