LT3667 Datasheet | Linear Technology

Features Triple Output Supply from a Single Input Requires Only One Inductor n I = 50μA at 12V to 5V, 3.3V and 2.5V with No Load Q IN n Buck Regulator: Low Ripple (<15m VP-P) Burst Mode Operation® 400m A Output with Internal Power Switch 4.3V to 40V Input Operation Range (60V Max) n Dual Low Dropout Linear Regulators 200m A Outputs with Programmable Current Limits 1.6V to 45V Input Range Fault Protected to ±45V n Adjustable 250k Hz to 2.2MHz Switching Frequency n Synchronizable Between 300k Hz and 2.2MHz n Programmable Undervoltage Lockout n Power Good Indicators n Available in a Thermally-Enhanced 16-Lead MSOP and 24-Lead (3mm × 5mm) QFN Packages n LT3667 40V 400m A Step-Down Switching Regulator with Dual Fault Protected LDOs Description The LT®3667 is a monolithic triple power supply posed of a 400m A buck switching regulator and two 200m A low dropout linear regulators (LDOs). The buck regulator includes a high efficiency switch, a boost diode, and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15m V in a typical application. Each LDO supplies 200m A of output current with a typical dropout voltage of 340m V, and each LDO has an accurate resistor programmable current limit. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting and reverse current protection. The LT3667 is available in a thermally-enhanced 16-Lead MSOP and a 24-Pin 3mm x 5mm QFN package with exposed pad for low thermal resistance. L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Applications n n n n Automotive Battery Regulation Power for Portable Instrumentation Industrial...