LT3071

RECOMMENDED FOR NEW DESIGNS

5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator with Analog Margining

Data Sheet (Rev. D) Product Selection Table
Part Models
6
1ku List Price
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Part Details

  • Output Current: 5A
  • Dropout Voltage: 85mV Typical
  • Digitally Programmable VOUT : 0.8V to 1.8V
  • Analog Output Margining: ±10% Range
  • Low Output Noise: 25μVRMS (10Hz to 100kHz)
  • Parallel Multiple Devices for 10A or More
  • Precision Current Limit: ±20%
  • Output Current Monitor: IMON = IOUT/2500
  • ±1% Accuracy Over Line, Load and Temperature
  • High Frequency PSRR: 30dB at 1MHz
  • Stable with Low ESR Ceramic Output Capacitors (15μF Minimum)
  • Enable Function Turns Output On/Off
  • VIOC Pin Controls Buck Converter to Maintain Low Power Dissipation and Optimize Efficiency
  • PWRGD/UVLO/Thermal Shutdown Flag
  • Current Limit with Foldback Protection
  • Thermal Shutdown
  • 28-Lead (4mm × 5mm × 0.75mm) QFN Package
LT3071
5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator with Analog Margining
LT3071 Application Circuit LT3071 Performance Graph LT3071 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2977
RECOMMENDED FOR NEW DESIGNS 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
Positive Linear Regulators (LDO) 1
LT3070
RECOMMENDED FOR NEW DESIGNS 5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3071
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC1434A

LT3071EUFD Demo Board | 5A, Low Noise, Digitally Programmable Output, 85mV Dropout Linear Regulator with Analog Margining, 1.32V ≤ VIN ≤ 3V, VOUT = 0.8V to 1.8V @ 5A

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Product Details

Demonstration circuit 1434 is an adjustable 5A linear regulator featuring the LT3071. The LT3071 is a low dropout voltage, UltraFast™ transient response linear regulator. The device supplies up to 5A of output current with a typical dropout voltage of 85mV. A 0.01μF reference bypass capacitor decreases output voltage noise to 25μVRMS. The LT3071’s high bandwidth permits the use of low ESR ceramic capacitors. Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. The demo board has a 1.32V to 3V input voltage range and a 2.2V to 3.6V BIAS voltage range. An analog margining function allows the user to adjust system output voltage over a continuous ±10% range. To maintain proper performance and regulation, the BIAS supply voltage must be higher than the IN supply voltage. For a given VOUT, the BIAS voltage must satisfy the following conditions: 2.2 ≤ VBIAS ≤ 3.6V and VBIAS ≥ (1.25 · VOUT + 1V).


For VOUT ≤ 0.95V, the minimum bias voltage is limited to 2.2V.
DC1434A
LT3071EUFD Demo Board | 5A, Low Noise, Digitally Programmable Output, 85mV Dropout Linear Regulator with Analog Margining, 1.32V ≤ VIN ≤ 3V, VOUT = 0.8V to 1.8V @ 5A
DC1434A - Schematic

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