LT3070-1
LT3070-1
RECOMMENDED FOR NEW DESIGNS5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator
- Part Models
- 6
- 1ku List Price
- Starting From $6.35
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Overview
- Output Current: 5A
- Dropout Voltage: 85mV Typical
- Enable Function Soft-Starts the Reference
- Digitally Programmable VOUT : 0.8V to 1.8V
- Digital Output Margining: ±1%, ±3% or ±5%
- Low Output Noise: 25μVRMS (10Hz to 100kHz)
- Parallel Multiple Devices for 10A or More
- Precision Current Limit: ±20%
- ±1% Accuracy Over Line, Load and Temperature
- Stable with Low ESR Ceramic Output Capacitors (15μF Minimum)
- High Frequency PSRR: 30dB at 1MHz
- 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
The LT3070-1 is a low 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 LT3070-1 EN pin controls the reference soft-start behavior in comparison to the LT3070 which controls the reference soft-start via the BIAS pin supply voltage. The LT3070-1’s high bandwidth permits the use of low ESR ceramic capacitors, saving bulk capacitance and cost. The LT3070-1’s features make it ideal for high performance FPGAs, microprocessors or sensitive communication supply applications.
Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. A margining function allows the user to adjust system output voltage in increments of ±1%, ±3% or ±5%. The IC incorporates a unique tracking function to control a buck regulator powering the LT3070-1’s input. This tracking function drives the buck regulator to maintain the LT3070-1’s input voltage to VOUT + 300mV, minimizing power dissipation.
Internal protection includes UVLO, reverse-current protection, precision current limiting with power foldback and thermal shutdown. The LT3070-1 regulator is available in a thermally enhanced 28-lead, 4mm × 5mm QFN package.
APPLICATIONS
- FPGA and DSP Supplies
- ASIC and Microprocessor Supplies
- Servers and Storage Devices
- Post Buck Regulation and Supply Isolation
Documentation
Data Sheet 1
Technical Articles 1
Brochure 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3070EUFD-1#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT3070EUFD-1#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT3070IUFD-1#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT3070IUFD-1#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT3070MPUFD-1#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT3070MPUFD-1#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice 2
- LT3070-1 Demo Circuit - Low Voltage, UltraFast™ Transient Response Linear Regulator (1.2V to .9V @ 5A)
- LT3070-1 - LDO Linear Regulators
Models for the following parts are available in LTspice:
- LT3070
- LT3070-1
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.
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