LTC3880 - Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
The LTC®3880/LTC3880-1 are dual, PolyPhase DC/DC synchronous step-down switching regulator controllers with an I2C-based PMBus compliant serial interface. The controllers use a constant frequency, current mode architecture that is supported by LTpowerPlay™ software development tool with graphical user interface (GUI).
Switching frequency, output voltage, and device address can be programmed using external configuration resistors. Parameters can be set via the digital interface or stored in EEPROM. Voltage, current, internal/external temperature and fault status can be read back through the bus interface. The LTC3880 incorporates a 5V linear regulator while the LTC3880-1 uses an external 5V supply for minimum power loss. See comparison to LTC3887 below.
Features
Typical Application  | Applications
Packaging  |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC3880EUJ-1#PBF | 6x6 QFN-40 | E | $7.64 | $5.35 |
| LTC3880EUJ-1#TRPBF | 6x6 QFN-40 | E | $5.41 | |
| LTC3880EUJ#PBF | 6x6 QFN-40 | E | $7.64 | $5.35 |
| LTC3880EUJ#TRPBF | 6x6 QFN-40 | E | $5.41 | |
| LTC3880IUJ-1#PBF | 6x6 QFN-40 | I | $8.86 | $6.20 |
| LTC3880IUJ-1#TRPBF | 6x6 QFN-40 | I | $6.26 | |
| LTC3880IUJ#PBF | 6x6 QFN-40 | I | $8.86 | $6.20 |
| LTC3880IUJ#TRPBF | 6x6 QFN-40 | I | $6.26 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC1590B-A | LTC3880EUJ Demo Board (RSENSE) I Vin Range: 6.5V to 24V, VOUT0 = 0.5V to 4V @ 20A, VOUT1 = 0.5V to 5V @ 20A, PMBus Controlled, works w/ DC1613A | $200.00 |
| DC1590B-B | LTC3880EUJ Demo Board (DCR) I Vin Range: 6.5V to 24V, VOUT0 = 0.5V to 4V @ 20A, VOUT1 = 0.5V to 5V @ 20A, PMBus Controlled, works w/ DC1613A | $200.00 |
| DC1709A | LTC3880/-1 Demo Board I Programming Clamshell Socketed Demo Board | $125.00 |
| DC1740A-A | LTC3880EUJ Demo Board | 7V ≤ VIN ≤ 14V; VOUT0: 0.5V to 4.1V @ 80A, PMBus Controlled, works w/ DC1613 | $250.00 |
| DC1740A-B | LTC3880EUJ Demo Board | 7V ≤ VIN ≤ 14V; VOUT0: 0.5V to 4.1V @ 20A, VOUT1: 0.5V to 4.1V @ 60A, PMBus Controlled, works w/ DC1613 | $250.00 |
| DC1753A-A | LTC3880EUJ Demo Board (RSENSE) | Dual Phase Single Output, PMBus Buck, 6.5V ≤ VIN ≤ 24V, Vout = 0.5V to 3.3V @ 40A | $200.00 |
| DC1753B-A | LTC3880EUJ Demo Board (RSENSE) I Dual Phase Single Output PMBus Buck, 6.5V ≤ Vin ≤ 24V, Vout = 0.5V to 3.3V @ 40A | Contact Factory |
| DC1753B-B | LTC3880EUJ Demo Board (DCR Sense) I Dual Phase Single Output PMBus Buck, 6.5V ≤ Vin ≤ 24V, Vout = 0.5V to 3.3V @ 40A | Contact Factory |
| DC1962C | Power System Management Demo Board (PowerStick): 14-Supply Management with LTC2977, LTC2974 & LTC3880 [Requires DC1613] | $95.00 |
| DC1962C-KIT | Starter Kit for Power System Management [Includes DC1962C, DC1613A] | $125.00 |
| 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 |
| DC2088A | LTC3880EUJ Demo Board | 7V ≤ VIN ≤ 14V; VOUT Range: 0.8V to 1.8V @ Up to 50A | $250.00 |
| DC2089A-A | LTC3880EUJ/LTC3870EUFD RSENSE Demo Board | 7V ≤ VIN ≤ 14V; VOUT = 0.8V to 1.8V @ 80A | Contact Factory |
| DC2089A-B | LTC3880EUJ/LTC3870EUFD DCR SENSE Demo Board | 7V ≤ VIN ≤ 14V; VOUT = 0.8V to 1.8V @ 80A | $275.00 |
Companion Boards
| Part Number | Description | Price |
|---|---|---|
| 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 |
| DC2294A | DC2294A - PSM Linduino One Shield [requires DC2026, CA2978] | $50.00 |
- LTC3880 Package Drawing LTC3880
- Product Errata - LTC3880
- AN135 - Implementing Robust PMBus System Software for the LTC3880
- AN137 - Accurate Temperature Sensing with an External P-N Junction
- AN145 - Overview of the EEPROM in LTC PSM Devices
- AN152 - Power System Management Addressing
- AN153 - 用于电源系统管理的 Linduino
- AN155 - Fault Log Decoding with Linduino PSM
- R526 - Reliability Data
- Digital Power System Management
- PMBus DC/DC Converters with Power System Management
- PMBus Power System Managers
- Power and Thermal Monitoring
- Power System Management
- Dual Output DC/DC Controller Combines Digital Power System Management with Analog Control Loop for ±0.5% VOUT Accuracy
- Design Checklist for LTC388X Family of PSM Buck Converters
- LTC3880 to LTC3887 - Migration Guide
- 双输出 DC/DC 控制器可实现 ±0.5% 的 Vout 准确度
- 数字电源是正确选择吗?
- 数字电源系统管理降低了数据中心的功耗
- 系统设计师的数字电源
- 无人操作军用系统需要性能较高的电子系统
- 通过 I2C/PMBus 接口和内置 EEPROM 进行数字电源系统管理的双输出同步降压型 DC/DC 控制器
- LTC3880 Footprints and Symbols
- Digital Power Done Right
- LTC3880 Demo Circuit - High Efficiency Dual 500kHz 3.3V/1.8V Step-Down Converter (6-24V to 3.3V @ 15A & 1.8V @ 15A)
- LTC3880 & LTC3870 Project - PolyPhase Digital PSM Step-Down with Rsense Sensing Plus Two Slave Controllers (7-14V to 1V @ 80A)
- LTC3880 & LTC3870 Project - PolyPhase Digital PSM Step-Down with Ultra-Low DCR Sensing Plus Two Slave Controllers (7-14V to 1V @ 80A)
- LTC3880 Project - Dual, Step-Down DC/DC Controller with Digital Power System Management & Inductor DCR Current Sensing (6.5-24V to 1.5V @ 20A & 1.8V @ 20A)
- LTC3880 Project - Dual, Step-Down DC/DC Controller with Digital Power System Management & Rsense Current Sensing (6.5-24V to 1.5V @ 20A & 1.8V @ 20A)
- LTC3880 Project - PolyPhase Step-Down DC/DC Controllers with Digital Power System Management & Inductor DCR Current Sensing (7-14V to 1.2V @ 100A)
- LTC3880 Project - PolyPhase Step-Down DC/DC Controllers with Digital Power System Management & Rsense Current Sensing (6.5-24V to 1.8V @ 40A)
- LTC3880 - DC1590B Linduino .INO File
- LTC3880 - Linduino CPP File
- LTC3880 - Linduino Header File
