36V, 4A Sync Buck VIN = 4.5V to 36V (Transients to 60V) VIN EN BST UVLO SW VC LT3690 3.3VOUT @4A BIAS FB VCCINT RT GND 70µA IQ, <15mVP-P Output Ripple and 92% Efficient ® The LT 3690 brings a new level of performance and features for high voltage point-of-load step-down conversion. Its wide input voltage range of 3.9V to 36V, with 60V transients, meets the needs of many of the rails common to industrial, medical and automotive applications. Up to 4A of continuous output current can be supplied to the load with minimal thermal design. Its 70µA of quiescent current in standby maximizes battery life in “always-on” applications. With up to 1.5MHz switching frequency and a high level of integration, the external components are few and small, enabling a compact solution footprint. Features LT3690 Demo Circuit Info & Free Samples (Actual Size) • Input Voltage Range: 3.9V to 36V (60V Transients) • 4A of Continuous Output Current • Quiescent Current of 70µA (12VIN to 3.3VOUT) • Low Output Ripple of <15mVP-P in Burst Mode® Operation • Programmable Switching Frequency: 170kHz to 1.5MHz • Output Voltage Range: 0.8V to 20V • Programmable Input Undervoltage Lockout • Compact 4mm x 6mm QFN Package www.linear.com/3690 1-800-4-LINEAR (20mm x 15mm) , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.