Fairchild Semiconductor offers designers of energy-sensitive systems a 300mA low-dropout (LDO) system balancing efficiency, transient response, and footprint size.

The FAN2564 is a low V_IN LDO offering the efficiency of a switcher-based system but in the footprint of an LDO. Traditional LDO regulators create low voltage supplies for digital processors. These LDO regulators are connected directly to the battery, resulting in poor efficiency.

The FAN2564 regulator has a dropout of 100mV and operates from supplies as low as 1.8V, allowing the device to post-regulate from existing low voltage supplies in the system. By operating from a low V_IN, the voltage drop across the LDO is reduced, resulting in high efficiency linear power conversion.
 
This LDO consumes low quiescent current (45µA at no load) and delivers a fast transient response enabling the application to be more resilient to fluctuations in load.

To accommodate the space-constrained challenges of applications with a digital load such as portable, medical, computing and computer peripherals, the FAN2564 is packaged in either compact 0.93mm x 1.41mm WL-CSP or 2mm x 2mm ultra-thin MLP packaging.

In addition, the FAN2564 uses standard 0402 capacitors that are quite small (1.00mm x 0.50mm), reducing board space in the overall design.
 
The FAN2564 is the latest addition to Fairchild’s comprehensive portfolio of LDOs, featuring low quiescent current, minimal noise and fast transient response.

The device uses lead-free (Pb-free) terminals and has been characterized for moisture sensitivity in accordance with the Pb-free reflow requirements of the joint IPC/JEDEC standard J-STD-020.
 
Price: FAN2564 in UMLP packaging: US $0.63, FAN2564 in WL-CSP packaging: US $0.69
 
Samples are available now, delivery is 8 weeks ARO
 
More information: www.fairchildsemi.com