The LT3685EMSE#PBF is a 36V, 2A, adjustable-frequency monolithic buck converter introduced by ADI, packaged in a 10-lead MSOP-EP surface-mount package with an exposed pad for improved thermal performance.
The device supports a wide input voltage range from 3.6V to 36V and can safely withstand transient voltage spikes up to 60V, making it ideal for unstable power environments in automotive and industrial applications. It delivers an output current of up to 2A, with the output voltage adjustable between 0.79V and 20V.
Its switching frequency can be adjusted within the range of 200kHz to 2.4MHz, enabling the use of small, low-cost inductors and ceramic capacitors, which helps reduce the overall solution size. The device employs a current-mode topology, providing fast transient response and excellent loop stability.
Features ：
• Product Type: Buck type DC-DC switching voltage regulator, single channel, adjustable output, asynchronous rectification
• Input voltage: 3.6V ~ 36V (operating), capable of withstanding 60V transient overvoltage protection
• Output voltage: Adjustable range: 0.79V to 20V
• Output current: Maximum 2A
• Switching frequency: Adjustable from 200kHz to 2.4MHz, supporting external clock synchronization
• Static Current (Iq): 0.01 µA (10 nA)
• Functional features: Integrated 0.25Ω power switch and boost diode, adjustable soft start, good power supply (PG) indicator, overcurrent protection
• Operating temperature range: -40°C to +125°C (TJ)
• Package type: MSOP-10-EP (10-pin MSOP with Exposed Pad), surface mount
• MSL level: Level-1 (unrestricted, unlimited workshop lifespan)
• Environmental compliance: Meets RoHS3 standards, lead-free
Application：
• Car battery regulation: Addressing voltage fluctuations and transients in the automotive power system
• Industrial power supply: Provides stable power for industrial control, sensors, etc.
• Distributed power supply regulation: Board-level power conversion for communication and network equipment
• Set Top Box and Wall-Type Transformer Adjustment
