VideosDocumentationDatasheet
Spec Notice
Application Note
- AN137 - Accurate Temperature Sensing with an External P-N Junction
- AN145 - Overview of the EEPROM in LTC PSM Devices
Design Note
Reliability Data
Product Selector Card
- Digital Power System Management
- PMBus DC/DC Converters with Power System Management
- PMBus Power System Managers
- Power and Thermal Monitoring
LT Journal
- DC/DC Controller Combines Digital Power System Management with Analog Control Loop for ±0.5% VOUT Accuracy
- High Performance Single Phase DC/DC Controller with Digital Power Management
Product Info
Press Release
cad_symbol
ltspice
LTpowerCAD
- LTC3883 Project - Single Phase Step-Down DC/DC Controller with Digital Power System Management & Inductor DCR Current Sensing (6.5-24V to 1.8V @ 20A)
- LTC3883 Project - Single Phase Step-Down DC/DC Controller with Digital Power System Management & Rsense Current Sensing (6.5-24V to 1.8V @ 20A)
Linduino
Features
- Order Custom Programmed Parts
- PMBus/I2C Compliant Serial Interface
– Telemetry Read-Back Includes VIN, IIN, VOUT, IOUT, Temperature and Faults
– Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC and Frequency Synchronization (250kHz to 1MHz) - ±0.5% Output Voltage Accuracy over Temperature
- Integrated 16-Bit ADC and 12-Bit DAC
- Integrated High Side Current Sense Amplifier
- Internal EEPROM and Fault Logging
- Integrated N-Channel MOSFET Gate Drivers
Power Conversion
- Wide VIN Range: 4.5V to 24V
- VOUT Range: 0.5V to 5.4V
- Analog Current Mode Control Loop
- Accurate PolyPhase® Current Sharing for Up to 6 Phases
- Auto Calibration of Inductor DCR
- Available in a 32-Lead (5mm × 5mm) QFN Package
Typical Application
Description
The LTC®3883/LTC3883-1 are PolyPhase capable DC/DC synchronous step-down switching regulator controllers with a PMBus compliant serial interface. The controllers use a constant frequency, current mode architecture that is supported by the LTPowerPlay™ software development tool with graphical user interface (GUI).
Switching frequency, output voltage, and device address can be programmed using external configuration resistors. Additionally, parameters can be set via the digital interface or stored in on-chip EEPROM.
The LTC3883/LTC3883-1 can be configured for Burst Mode® operation, discontinuous (pulse-skipping) mode or continuous inductor current mode. The LTC3883 incorporates an internal 5V linear regulator while the LTC3883-1 uses an external 5V supply for minimum power loss.
The LTC3883/LTC3883-1 are available in a 32-lead 5mm × 5mm QFN package.
5x5 QFN-32
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC3883EUH#PBF | QFN | 32 | E | $6.89 | $4.82 |
| LTC3883EUH#TRPBF | QFN | 32 | E | $4.88 | |
| LTC3883EUH-1#PBF | QFN | 32 | E | $6.89 | $4.82 |
| LTC3883EUH-1#TRPBF | QFN | 32 | E | $4.88 | |
| LTC3883IUH#PBF | QFN | 32 | I | $7.56 | $5.29 |
| LTC3883IUH#TRPBF | QFN | 32 | I | $5.35 | |
| LTC3883IUH-1#PBF | QFN | 32 | I | $7.56 | $5.29 |
| LTC3883IUH-1#TRPBF | QFN | 32 | I | $5.35 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1778B-A | LTC3883EUH Demo Board | 6.5V < VIN < 24V; 0.5V < VOUT < 5V @ 20A, with RSENSE Current Sense | Contact Factory | |
| DC2052A | LTC3880EUJ/LTC3883EUH, 3-Phase Demo Board, Vin Range: 6.5V to 14V, Vout Range: 0.5V to 1.8V @ 60A, PMBus Controlled, works w/ DC1613 Dongle | $250.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1613A | USB-to-PMBus Controller for Use with LTpowerPlay | $50.00 | |
| DC2026C | Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform | $75.00 |