Datasheet Linear Technology LT3975EMSE#PBF — Datenblatt

LT3975
42V, 2.5A, 2MHz Step-Down
Switching Regulator with
2.7µA Quiescent Current
FEATURES DESCRIPTION Ultralow Quiescent Current: 2.7µA IQ at 12VIN to 3.3VOUT
n Low Ripple Burst Mode® Operation Output Ripple < 15mVP-P
n Wide Input Range: Operation from 4.3V to 42V
n 2.5A Maximum Output Current
n Excellent Start-Up and Dropout Performance
n Adjustable Switching Frequency: 200kHz to 2MHz
n Synchronizable Between 250kHz to 2MHz
n Accurate Programmable Undervoltage Lockout
n Low Shutdown Current: I = 700nA
Q
n Power Good Flag
n Soft-Start Capability
n Thermal Shutdown Protectio Current Limit Foldback with Soft-Start Override
n Saturating Switch Design: 75mΩ On Resistance
n Small, Thermally Enhanced 16-Lead MSOP Package The LT®3975 is an adjustable frequency monolithic buck
switching regulator that accepts a wide input voltage range
up to 42V. Low quiescent current design consumes only
2.7µA of supply current while regulating with no load. Low
ripple Burst Mode operation maintains high efficiency at …