• Product Introduction

LTC1266IS 

N or P channel MOSFET synchronous regulator controller

peculiarity

• Ultra-high efficiency: more than 95% possibility
• Drive the high current of the N-channel MOSFET or the low dropout of the P-channel MOSFET
• Pin-selectable burst mode operation
• 1% output accuracy (LTC1266A)
• Pin selectable top-edge drive boost or buck operating stage
• Wide V IN range: 3.5V to 20V
• Low battery voltage detection chip
• Maintain high efficiency over a large current range
• Low 170μA standby current at light loads
• Current mode works with excellent line and load transient response
• Logic-controlled micropower shutdown: I Q
• Short-circuit protection
• Synchronous switch for nonoverlaping gate drivers
• Available in a 16-pin narrow SO package

description

The LTC ® 1266 Series is a synchronous switching regulator controller with automatic burst mode ™ operation to maintain high efficiency at low output currents in the home. These devices drive external power MOSFETs with a constant shutdown time current-mode architecture with switching frequencies up to 400kHz, providing constant inductor current ripple. They can drive an N-channel or P-channel upper MOSFET. The operating current level is user-programmable by means of an external current sense resistor. Wide input voltage range from 3.5V to 18V (20V max). The constant shutdown time architecture provides low dropout regulation that can only be controlled by a limited upper MOSFET R DS(ON), a inductor (when using a P-channel) and a current sense resistor. LTC1266 series combines the highest efficiency, synchronous switching of high currents in automatic low-current operation mode, the so-called burst mode operation, thus reducing switching losses. Standby power consumption is reduced by only 1mW (I OUT = 0) at V IN = 5V. The load current operating in burst mode is generally 0 mA and 500mA.