The LT1961EMS8E#PBF is a Dual Monolithic 1.25MHz Step-up Switching Regulator with high efficiency 1.5A, 0.2R switch. This switch is included on the die together with all the control circuitry required to complete a high frequency, current-mode switching regulator. Current-mode control provides fast transient response and excellent loop stability. New design techniques achieve high efficiency at high switching frequencies over a wide operating voltage range. A LDO internal regulator maintains consistent performance over a wide range of inputs from 24V systems to Li-ion batteries. A 1mA operating supply current maintains high efficiency, especially at lower output current. Synchronization allows an external logic level signal to increase the internal oscillator from 1.5 to 2MHz. Full cycle-by-cycle switch current limit protection and thermal shutdown are provided. High frequency operation allows reduction of input and output filtering components and permits the use of chip inductors.
High efficiency 0.2R switch
1.2V Feedback reference voltage
2% Overall output voltage tolerance
Uses low profile surface mount external components
Low shutdown current (6μA)
Synchronizable from 1.5 to 2MHz
Current-mode loop control
Constant maximum switch current rating at all duty cycles
(EN)
