ANALOG DEVICES LT3970EMS-5#TRPBF Switching Regulator, Buck, 2.2MHz, 4.2V to 40V Input, 5V Output, 350mA, Fixed, MSOP-10

LT3970EMS-5#TRPBF is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 40V and consumes only 2.5µA of quiescent current. A high-efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control, and logic circuitry. Low-ripple burst mode operation maintains high efficiency at low output currents while keeping the output ripple below 5mV in a typical application. Current-mode topology is used for fast transient response and good loop stability. A catch diode current limit provides protection against shorted outputs and overvoltage conditions. An enable pin with accurate threshold is available, producing a low shutdown current of 0.7µA. A power good flag signals when VOUT reaches 90% of the programmed output voltage. Applications include automotive battery regulation, power for portable products, and industrial supplies.

• Wide input voltage range from 4.2V to 40V, integrated boost and catch diodes
• Internal sense limits catch diode current, power good flag
• Internal compensation, 5V output voltage
• Switching frequency is 2.25MHz typical at TA = 25°C, RT = 41.2k, VIN = 6V
• Switch current limit is 700mA typical at (VIN = 5V, VFB = 0V, TA = 25°C)
• Switch VCESAT is 175mV typical at (ISW = 200mA, TA = 25°C)
• Switch leakage current is 2µA maximum at (TA = 25°C)
• Minimum switch on-time is 90ns typical at TA = 25°C
• Operating junction temperature range from -40°C to 125°C
• 10-lead plastic MSOP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party