LT8618LT8618-3.3LT8618C Series
High Efficiency 65V/100mA Synchronous Bucks
Manufacturer: Analog Devices
Catalog
High Efficiency 65V/100mA Synchronous Bucks
| Part | Voltage - Input (Min) [Min] | Topology | Function | Number of Outputs | Qualification | Grade | Voltage - Input (Max) [Max] | Synchronous Rectifier | Operating Temperature [Min] | Operating Temperature [Max] | Voltage - Output (Min/Fixed) | Frequency - Switching [Max] | Frequency - Switching [Min] | Package / Case | Current - Output | Output Type | Output Configuration | Mounting Type | Supplier Device Package | Voltage - Output (Max) [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 3.4 V | Buck | Step-Down | 1 | AEC-Q100 | Automotive | 60 V | -40 °C | 125 ¯C | 0.778 V | 2.2 MHz | 200 kHz | 10-WFDFN Exposed Pad | 100 mA | Adjustable | Positive | Surface Mount | 10-DFN (3x2) | 60 V | |
Analog Devices | 3.4 V | Buck | Step-Down | 1 | 60 V | -40 °C | 125 ¯C | 0.778 V | 2.2 MHz | 200 kHz | 12-VFQFN Exposed Pad | 100 mA | Adjustable | Positive | Surface Mount | 12-LQFN (2x2) | 60 V | |||
Analog Devices | 3.4 V | Buck | Step-Down | 1 | 60 V | -40 °C | 125 ¯C | 0.778 V | 2.2 MHz | 200 kHz | 12-VFQFN Exposed Pad | 100 mA | Adjustable | Positive | Surface Mount | 12-LQFN (2x2) | 60 V |
Key Features
• High Efficiency Synchronous Operation> 90% Efficiency at 30mA, 12VINto 3.3VOUT
• > 90% Efficiency at 30mA, 12VINto 3.3VOUT
• Pin Selectable Forced Continuous or Burst Mode®Operation (LT8618C Only)
• Ultralow Quiescent Current Burst Mode Operation< 2.5μA IQRegulating 48VINto 3.3VOUTOutput Ripple < 10mVP-P
• < 2.5μA IQRegulating 48VINto 3.3VOUT
• Output Ripple < 10mVP-P
• 3.4V to 60V Input Operation Range (65V Max)
• Fast Minimum Switch-On Time: 35ns
• Adjustable (All) And Synchronizable (LT8618C Only) Switching Frequency: 200kHz to 2.2MHz
• Fixed 3.3V Output Voltage Version (LT8618-3.3)
• Accurate 1V Enable Pin Threshold (All) with Adjustable Hysteresis (LT8618C Only)
• Internal Compensation
• Output Soft-Start and Tracking
• Small 12-Lead 2mm × 2mm LQFN (LT8618C) and 10-Lead 3mm × 2mm DFN Packages
• AEC-Q100 Qualified for Automotive Applications (LT8618/LT8618-3.3)
Description
AI
The LT8618 family are compact, high speed synchronous monolithic step-down switching regulators that deliver up to 100mA to the output with high efficiency at a constant frequency, even up to 2.2MHz. They accept a wide input voltage range up to 65V (transients only, 60V for continuous operation), and consume only 2.5μA of quiescent current when operating in Burst Mode. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components.The LT8618C includes BST and INTVCCceramic capacitors for a more compact solution while having SYNC/MODE and HYST pins. The SYNC/MODE pin selects the regulator’s operation between forced continuous mode, for predictive interference in sampling systems, Burst Mode, for increased efficiency at light loads or spread spectrum for Low EMI. It also allows synchronization to an external clock to further increase signal to noise ratio in high-resolution acquisition systems.A PG flag signals when VOUTis within ±7.5% of the programmed output voltage and when in fault conditions. Thermal shutdown provides additional protection.PACKAGESYNC/HYST150°C GRADEINTERNAL CAPSFB RESISTORSLT8618DFNNoYesNoExternalLT8618-3.3DFNNoYesNoInternalLT8618CLQFNYesNoYesExternalApplicationsIndustrial SensorsIndustrial Internet of Things4mA to 20mA Current LoopsFlow MetersAutomotive Housekeeping Supplies