LT3070

• Product introduction

LT30705A, low noise, programmable output, 85mV dropout linear regulator

peculiarity

• Output current: 5A
• Dropout Voltage: 85mV Typical
• Digitally programmable V_OUT: 0.8V to 1.8V
• Digital output margining: ±1%, ±3%, or ±5%
• Low output noise: 25μV_RMS(10Hz to 100kHz)
• Multiple devices can be paralleled to deliver 10A or higher
• Precision Current Limit: ±15%
• Provides ±1% accuracy over voltage, load, and temperature
• Stable with low ESR ceramic output capacitors with a minimum capacitance of 15μF
• High frequency PSRR: 30dB at 1MHz
• The enable function is responsible for the turn-on/turn-off control of the output
• The VIOC pin controls the step-down converter to maintain low power consumption and optimize efficiency
• PWRGD (Power Good) / UVLO (Undervoltage Lockout) / Thermal Shutdown Flag
• Current limit with foldback protection
• Thermal shutdown
• 28-pin (4mm x 5mm x 0.75mm) QFN package

• description

  LT^®The 3070 is a low voltage, UltraFast^TMTransient response linear regulator. The device can deliver up to 5A of output current and a typical dropout voltage of 85mV. A 0.01μF reference bypass capacitor reduces output voltage noise to 25μV_RMS。 The LT3070's high bandwidth allows the use of low ESR ceramic capacitors, eliminating bulk capacitance and saving cost. The LT3070 features make it ideal for high performance FPGAs, microprocessors or sensitive communications power applications.

  The output voltage can be selected digitally (selectable from 0.8V to 1.8V in 50mV increments). A margin adjustment function allows the user to adjust the system output voltage in increments of ±1%, ±3%, or ±5%. The IC contains a unique tracking function that controls a step-down regulator that powers the LT3070 inputs. This tracking function is used to drive a step-down regulator designed to maintain the LT3070's input voltage at V_OUT+ 300mV, thus minimizing power consumption.

  The device's internal protection features include UVLO, reverse current protection, precision current limit with power foldback, and thermal shutdown. The LT3070 regulator is available in a thermally enhanced 28-lead, 4mm × 5mm QFN package.

• apply

  • FPGA and DSP power supplies
  • ASIC and microprocessor power supplies
  • Servers and storage
  • Post buck regulation and power isolation