• Product introduction

LTC1266IS

N- or P-channel MOSFET synchronous regulator controller

peculiarity

• Ultra-high efficiency: more than 95%.possible
• High current driving N-channel MOSFETs or P-channel MOSFETs with low dropout voltages
• Pin selectable burst mode operation
• 1% Output Accuracy (LTC1266A)
• The pin-selectable top side drives the boost or buck operation stage
• Wide V_INRange: 3.5V to 20V
• Low battery voltage detection chip
• Maintain high efficiency over a wide current range
• Low 170μA standby current at light loads
• Current mode operation with excellent line and load transient response
• Logic-controlled micropower shutdown_：IQ
• Short-circuit protection
• Nonoverlaping synchronous switch for door drivers
• Available in a narrow 16-pin SO package

description

The LTC ® 1266 family is a synchronous switching regulator controller with automatic Burst Mode ™ operation to maintain high efficiency at low output currents. These devices drive external power MOSFETs with a constant off-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. With an external current sense resistor, the operating current level is user-programmable. Wide input voltage range from 3.5V to 18V (20V max). The constant off-time architecture provides low dropout regulation by limited upper MOSFETs_targetR_{DS（ON），（}When using P-channel) of the inductor and the resistance of the current sense resistor. The LTC1266 family combines the highest efficiency of high-current synchronous switching in automatic low current mode operation, known as Burst Mode operation, to reduce switching losses. Standby power consumption is reduced by only 1mW (I_{OUT = 0）}In V_IN=_{5V。 The load current for Burst Mode operation is typically 500mA of 0 mA}。