LT7170/
LT7170-1
RECOMMENDED FOR NEW DESIGNS
20 A, 16 V, Single- or Dual-Phase, Silent Switcher Step-Down Regulators with Digital Power System Management
- Part Models
- 2
- 1ku List Price
- Starting From $10.06
Overview
- Silent Switcher® architecture: enables a compact, efficient, low EMI solution
- PMBus/I2C serial interface
- Telemetry read back includes VOUT, IOUT, VIN, die temperature, and faults
- Programmable voltage, current limit, sequencing, soft start and stop, undervoltage and overvoltage, phase, frequency (up to 4 MHz), and loop compensation
- Integrated three times programmable NVM
- Key parameters selectable by resistor
- VOUT set point range: 0.4 V to 5.5 V
- VOUT accuracy: ±0.25%, 0.6 V ≤ VOUT ≤ 1.375 V
- Differential remote VOUT sense
- Fast transient response
- Wide VIN supply range: down to 2.9 V or 1.5 V with EXTVCC
- Programmable and synchronizable: 400 kHz to 4 MHz
- 24-lead (3.5 mm × 4 mm) LQFN package
The LT7170/LT7170-1 are monolithic DC/DC synchronous stepdown regulators that deliver up to 20 A of continuous output current. The LT7170-1 option has two switching phases that are connected to two inductors to drive a single-regulated output supply. The quick, clean, low-overshoot switching edges deliver high efficiency while minimizing electromagnetic interference (EMI) emissions. The I2C-based PMBus 1.3-compliant serial interface enables control of device functions while providing telemetry information for system monitoring. The LT7170/LT7170-1 are supported by the LTpowerPlay® graphical user interface (GUI) tool.
The controlled on-time valley current-mode control with 25 ns typical minimum on-time enables a high switching frequency (fSW) at a low output voltage (VOUT) with excellent transient response in a small overall solution size.
VOUT, fSW, and phase are selectable using external configuration resistors. Settings can also be set via the PMBus interface or stored in the on-chip, three times programmable nonvolatile memory (NVM).
To guarantee clean start-up of the powered devices, the LT7170/ LT7170-1 actively pull down the output using VSENSEP when the output is disabled. The LT7170/LT7170-1 wait until the VOUT is less than 0.2 V before enabling the output and beginning a soft start. This VOUT discharge threshold is programmable from 0.2 V to 2.2 V. The LT7170/LT7170-1 use forced-continuous switching operation.
Documentation
Data Sheet 1
User Guide 3
Application Note 1
Product Selector Card 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 |
|---|---|---|---|
| LT7170RV#TRMPBF | 24-Lead LQFN Package (3.5 mm × 4mm × 0.95mm) | ||
| LT7170RV#TRPBF | 24-Lead LQFN Package (3.5 mm × 4mm × 0.95mm) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LT7170
- LT7170-1
LTpowerCAD
Design tools for the following parts are available in LTpowerCAD:
- LT7170
- LT7170-1
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.
Evaluation Kits
20A, 16V Single-Phase Silent Switcher Step-Down Regulator with Digital Power System Management
Resources
20A, 16V Dual-Phase Silent Switcher Step-Down Regulator with Digital Power System Management