LTC3886 - 60V Dual Output Step-Down Controller with Digital Power System Management
Features
- 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, Frequency, and Control Loop Compensation - Output Error Less Than ±0.5% 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 60V
- VOUT0, VOUT1 Range: 0.5V to 13.8V
- Analog Current Mode Control
- Accurate PolyPhase® Current Sharing for Up to 6 Phases (100kHz to 750kHz)
- Available in a 52-Lead (7mm × 8mm) QFN Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC®3886 is a dual PolyPhase DC/DC synchronous step-down switching regulator controller with I2C-based PMBus compliant serial interface. This controller employs a constant-frequency, current-mode architecture, with high voltage input and output capability along with programmable loop compensation. The LTC3886 is supported by the LTpowerPlay™ software development tool with graphical user interface (GUI).
The EXTVCC pin supports voltages up to 14V allowing for optimized circuit efficiency and die temperature, and for the controller output to supply the chip power. Switching frequency, output voltage, and device address can be programmed both by digital interface as well as external configuration resistors. Parameters can be set via the digital interface or stored in EEPROM. Both outputs have an independent power good indicator and FAULT function.
The LTC3886 can be configured for discontinuous (pulseskipping) mode or continuous inductor current mode.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC3886EUKG#PBF | 7x8 QFN-52 | UKG | E | 05-08-1947 | Yes |
| LTC3886EUKG#TRPBF | 7x8 QFN-52 | UKG | E | 05-08-1947 | Yes |
| LTC3886IUKG#PBF | 7x8 QFN-52 | UKG | I | 05-08-1947 | Yes |
| LTC3886IUKG#TRPBF | 7x8 QFN-52 | UKG | I | 05-08-1947 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3886EUKG#PBF | 7x8 QFN-52 | E | $9.07 | $6.35 | Yes | |
| LTC3886EUKG#TRPBF | 7x8 QFN-52 | E | $6.41 | Yes | ||
| LTC3886IUKG#PBF | 7x8 QFN-52 | I | $9.91 | $6.94 | Yes | |
| LTC3886IUKG#TRPBF | 7x8 QFN-52 | I | $7.00 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
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 |
|---|---|---|---|
| DC2155A-A | LTC3886UKG Demo Board (RSENSE) Dual Phase Dual Output PMBus Buck 18V≤VIN≤54V, VOUT0/VOUT1=5V to 12V at 12A per channel, 150kHz | Contact Factory | |
| DC2155A-B | LTC3886UKG/LTC3870UFD Demo Board (RSENSE) | 4 Phase Single Output PMBus Buck 18V≤VIN ≤54V, VOUT=12V at 48A, 150kHz | Contact Factory | |
| DC2277A | LTC3886 UKG Package Clamshell Programming Demo Board | $200.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1613A | USB-to-PMBus Controller for Use with LTpowerPlay | $50.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3886EUKG#PBF | 7x8 QFN-52 | E | $9.07 | $6.35 | Yes | |
| LTC3886EUKG#TRPBF | 7x8 QFN-52 | E | $6.41 | Yes | ||
| LTC3886IUKG#PBF | 7x8 QFN-52 | I | $9.91 | $6.94 | Yes | |
| LTC3886IUKG#TRPBF | 7x8 QFN-52 | I | $7.00 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Telecom, Datacom, and Storage Systems
- Industrial and Point of Load Applications
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Product Notifications
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Design Tools
LTpowerCAD
The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD
Design tools for the following parts are available in LTpowerCAD:
LTC3886
LTC3886 Parallel
LTC3886+LTC3870 Parallel
Linduino
Linduino is an Arduino compatible platform for developing and distributing firmware libraries and code for SPI and I²C-compatible integrated circuits. The Linduino One board interfaces to more than 300 QuikEval demonstration cards, supporting a variety of product types including analog-to-digital converters (ADCs), digital-to-analog converters (DACs), power monitors, and more. Firmware libraries for individual devices are written in C and designed to be portable to a wide variety of processors and microcontrollers. Each library has a demonstration program that can be uploaded to the Linduino One platform to allow the circuit and software to be quickly and easily verified.
Code
Linduino is Linear Technology's Arduino compatible system for developing and distributing firmware libraries and example code for Linear Technology’s integrated circuits. The code below can be downloaded or copied and pasted into your project. Please visit the Linduino Home Page for demo board, manual and setup information.
This part is Code Supported: There is example code available for this part. The code below may rely on other drivers available in the full library.
Download LTC3886 - Linduino CPP File
#include "LT_PMBusDeviceLTC3886.h"
uint32_t LT_PMBusDeviceLTC3886::cap_ = HAS_VOUT
| HAS_VIN
| HAS_IOUT
| HAS_IIN
| HAS_POUT
| HAS_PIN
| HAS_TEMP
| HAS_DC
| HAS_STATUS_WORD
| HAS_STATUS_EXT
;Download LTC3886 - Linduino Header File
/*!
LTC PSM Device
@verbatim
Representation of a device and its capabilities.
@endverbatim
REVISION HISTORY
$Revision: 3845 $
$Date: 2015-08-24 14:11:21 -0600 (Mon, 24 Aug 2015) $
Copyright (c) 2014, Linear Technology Corp.(LTC)
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of Linear Technology Corp.
The Linear Technology Linduino is not affiliated with the official Arduino team.
However, the Linduino is only possible because of the Arduino team's commitment
to the open-source community. Please, visit http://www.arduino.cc and
http://store.arduino.cc , and consider a purchase that will help fund their
ongoing work.
*/
/*! @file
@ingroup LT_PMBusDevice
Library Header File for LT_PMBusDeviceLTC3886
*/
#ifndef LT_PMBusDeviceLTC3886_H_
#define LT_PMBusDeviceLTC3886_H_
#include "LT_PMBusDeviceController.h"
class LT_PMBusDeviceLTC3886 : public LT_PMBusDeviceController
{
public:
static uint32_t cap_;
LT_PMBusDeviceLTC3886(LT_PMBus *pmbus, uint8_t address) : LT_PMBusDeviceController(pmbus, address, 2)
{
}
uint32_t getCapabilities (
)
{
return cap_;
}
//! Is/are these capability(s) supported?
//! @return true if yes
bool hasCapability(
uint32_t capability //!< List of capabilities
)
{
return (cap_ & capability) == capability;
}
static LT_PMBusDevice *detect(LT_PMBus *pmbus, uint8_t address)
{
uint16_t id;
LT_PMBusDeviceLTC3886 *device;
id = pmbus->readMfrSpecialId(address);
if ((id & 0xFFF0) == 0x4600)
{
if (pmbus->getRailAddress(address) != address)
{
device = new LT_PMBusDeviceLTC3886(pmbus, address);
device->probeSpeed();
return device;
}
else
return NULL;
}
else
return NULL;
}
uint8_t getNumPages(void)
{
return 2;
}
};
#endif /* LT_PMBusDeviceLTC3886_H_ */
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.