LT3990 Series
62V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes
Manufacturer: Analog Devices Inc
Catalog
62V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes
| Part | Function | Mounting Type | Topology | Voltage - Output (Min/Fixed) | Number of Outputs | Supplier Device Package | Current - Output | Voltage - Output (Max) [Max] | Package / Case | Package / Case | Voltage - Input (Max) [Max] | Voltage - Input (Min) [Min] | Output Type | Operating Temperature [Max] | Operating Temperature [Min] | Frequency - Switching [Min] | Frequency - Switching [Max] | Output Configuration | Synchronous Rectifier | Output Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc LT3990IMSE#PBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 16-MSOP-EP | 350 mA | 25 V | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | ||
Analog Devices Inc LT3990EDD#PBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 10-DFN (3x3) | 350 mA | 25 V | 10-WFDFN Exposed Pad | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | |||
Analog Devices Inc LT3990HMSE-3.3#PBF | Step-Down | Surface Mount | Buck | 3.3 V | 1 | 16-MSOP-EP | 350 mA | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | 150 C | -40 °C | 210 kHz | 2.3 MHz | Positive | 27.03 °C/W | |||
Analog Devices Inc LT3990IDD#PBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 10-DFN (3x3) | 350 mA | 25 V | 10-WFDFN Exposed Pad | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | |||
Analog Devices Inc LT3990HMSE-5#PBF | Step-Down | Surface Mount | Buck | 5 V | 1 | 16-MSOP-EP | 350 mA | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | 150 C | -40 °C | 210 kHz | 2.3 MHz | Positive | 27.03 °C/W | |||
Analog Devices Inc LT3990EMSE-3.3#PBF | Step-Down | Surface Mount | Buck | 3.3 V | 1 | 16-MSOP-EP | 350 mA | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | 27.03 °C/W | |||
Analog Devices Inc LT3990EDD#TRPBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 10-DFN (3x3) | 350 mA | 25 V | 10-WFDFN Exposed Pad | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | |||
Analog Devices Inc LT3990IMSE-3.3#TRPBF | Step-Down | Surface Mount | Buck | 3.3 V | 1 | 16-MSOP-EP | 350 mA | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | 27.03 °C/W | |||
Analog Devices Inc LT3990IMSE-5#TRPBF | Step-Down | Surface Mount | Buck | 5 V | 1 | 16-MSOP-EP | 350 mA | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | 27.03 °C/W | |||
Analog Devices Inc LT3990EMSE#TRPBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 16-MSOP-EP | 350 mA | 25 V | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | ||
Analog Devices Inc LT3990IMSE#TRPBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 16-MSOP-EP | 350 mA | 25 V | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive | ||
Analog Devices Inc LT3990HMSE#PBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 16-MSOP-EP | 350 mA | 25 V | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | Adjustable | 150 C | -40 °C | 210 kHz | 2.3 MHz | Positive | ||
Analog Devices Inc LT3990EMSE#PBF | Step-Down | Surface Mount | Buck | 1.21 V | 1 | 16-MSOP-EP | 350 mA | 25 V | 0.118 in, 3 mm | 16-TFSOP | 62 V | 4.2 V | Adjustable | 125 ¯C | -40 °C | 210 kHz | 2.3 MHz | Positive |
Key Features
• Low Ripple Burst Mode®Operation2.5μA IQat 12VINto 3.3VOUTOutput Ripple < 5mVP-P
• 2.5μA IQat 12VINto 3.3VOUT
• Output Ripple < 5mVP-P
• Wide Input Voltage Range: 4.2V to 62V Operating
• Adjustable Switching Frequency: 200kHz to 2.2MHz
• Integrated Boost and Catch Diodes
• 350mA Output Current
• Fixed Output Voltages: 3.3V, 5V2μA IQat 12VIN
• 2μA IQat 12VIN
• Accurate Programmable Undervoltage Lockout
• FMEA Fault Tolerant (MSOP Package)Output Stays at or Below Regulation Voltage DuringAdjacent Pin Short or When a Pin is Left Floating
• Output Stays at or Below Regulation Voltage During
• Adjacent Pin Short or When a Pin is Left Floating
• Low Shutdown Current: IQ= 0.7μA
• Internal Sense Limits Catch Diode Current
• Power Good Flag
• Small, Thermally Enhanced 16-Pin MSOP and (3mm × 3mm) DFN Packages
• AEC-Q100 Qualified for Automotive Applications
Description
AI
The LT3990 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 62V, and consumes only 2.5μA of quiescent current. A high efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control and logic circuitry. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 5mV in a typical application. Current mode topology is used for fast transient response and good loop stability. A catch diode current limit provides protection against shorted outputs and overvoltage conditions. An accurate programmable undervoltage lockout feature is available, producing a low shutdown current of 0.7μA. A power good flag signals when VOUTreaches 90% of the programmed output voltage. The LT3990 is available in small, thermally enhanced 16-pin MSOP and 3mm × 3mm DFN packages.APPLICATIONSAutomotive Battery RegulationPower for Portable ProductsIndustrial Supplies