Analog DevicesLT8610EMSE#PBFDC to DC Converter and Switching Regulator Chip

The LT8610 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current.

Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8610 reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8610 is available in a small 16-lead MSOP package with exposed pad for low thermal resistance.

Key Features and Benefits

• •  Integrated fully differential ADC driver with signal scaling
• •  Wide input common-mode voltage range
• •  High common-mode rejection
• •  Single-ended to differential conversion
• •  Pin selectable input range with overrange
• •  Input ranges with 4.096 V REFBUF: ±10 V, ±5 V, ±4.096 V, ±2.5 V, and ±1.5 V
• •  Gain/attenuation options: 0.37, 0.73, 0.87, 1.38, and 2.25
• •  Critical passive components
• •  0.005% precision matched resistor array for FDA
• •  9 mm × 9 mm, 0.8 mm pitch, 100-ball CSP_BGA package
• •  2.5× footprint reduction vs. discrete solution

Applications

• •  Automotive and Industrial Supplies
• •  General Purpose Step-Down
• •  GSM Power Supplies

Evaluation Board

The LT8610 can be evaluated with the DC1749B

Block Diagrams and Tables