LTC2928
RECOMMENDED FOR NEW DESIGNSMultichannel Power Supply Sequencer and Supervisor
- Part Models
- 8
- 1ku List Price
- Starting From $4.72
Part Details
- Easily Configure Power Management without Software
- Controls Up to Four Supplies per Device
- Cascades for Additional Supplies
- Staged Supply Sequencing with Adjustable Time Positions
- Fault Event Reporting with Diagnostics
- Selectable System Shutdown on Fault
- 1.5% Undervoltage Monitor Accuracy
- Overvoltage and/or Fault Indication
- Configurable Undervoltage and Overvoltage Thresholds
- Charge Pumped Enable Pins Drive N-Channel MOSFETs
- Operates from 2.9V to 16.5V
- 5mm × 7mm 38-lead QFN and 36-lead SSOP Packages
The LTC2928 is a four channel cascadable power supply sequencer and high accuracy supervisor. Sequencing thresholds, order and timing are configured with just a few external components, negating the need for PC board layout or software changes during system development. Multiple LTC2928s may be easily connected to sequence an unlimited number of power supplies.
Sequence outputs control supply enable pins or N-channel pass gates. Precision input comparators with individual outputs monitor power supply voltages to 1.5% accuracy. Supervisory functions include undervoltage and overvoltage monitoring and reporting as well as μP reset generation. RST may be forced high to complement margin testing.
Application faults, whether internally or externally generated, can shutdown all controlled supplies. The type and source of faults are reported for diagnosis. Individual channel controls are available to independently exercise enable outputs and supervisory functions.
A high voltage input allows the LTC2928 to be powered from voltages as high as 16.5V. A buffered reference output permits single negative power supply sequencing and monitoring operations.
APPLICATIONS
- Network/Telecom Infrastructure
- Sequencing for Multiple I/O and Core Voltages
- Power Management
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Design Note 3
Technical Articles 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 |
|---|---|---|---|
| LTC2928CG#PBF | 24-Lead SSOP | ||
| LTC2928CG#TRPBF | 24-Lead SSOP | ||
| LTC2928CUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2928CUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2928IG#PBF | 24-Lead SSOP | ||
| LTC2928IG#TRPBF | 24-Lead SSOP | ||
| LTC2928IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2928IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
Nov 18, 2019 - 19_0266 Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC |
||
| LTC2928CG#PBF | PRODUCTION | |
| LTC2928CG#TRPBF | PRODUCTION | |
| LTC2928IG#PBF | PRODUCTION | |
| LTC2928IG#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Digital Power System Managers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Digital Temperature Sensors 1 | ||
| LTC2991 | RECOMMENDED FOR NEW DESIGNS | Octal I2C Voltage, Current, and Temperature Monitor |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC2928
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
LTC2928, 4-channel Sequencer and Supervisor w/ Fault Rep
Resources
Reference Designs
DC to 5.5 GHz Signal Generator with +/-0.5 dB Calibrated Output Power