LINEAR 2PB_3675 Configurable 7-Channel High Power PMIC Owner's Manual & User Guide
Summary
This integrated power management solution is designed for high-power single-cell Li-Ion/Polymer systems requiring advanced output flexibility. The manual details the LTC3675's capabilities, including seven independent rails: four high-efficiency synchronous buck converters, a buck-boost regulator, and a boost converter. It covers programmable control via I²C, an always-on LDO, dual-string LED driving, and robust fault monitoring (UV/over-temp). Ideal for engineers designing portable instruments, handheld terminals, or multioutput low voltage supplies needing reliable performance in industrial settings.
Page 1 Text Content
Configurable 7-Channel High Power PMIC
2.7V to 5.5V
I2C SW1-4 4 Buck Converters (500m A ×2, 1A ×2)
VOUT5 Boost Converter (Up to 1A)
VOUT6 Buck-Boost Converter (Up to 1A)
ONB LDO 25m A LDO
Pushbutton
Up to 10 LEDs
LTC3675 40V LED Driver
QFN-44
4 Parallelable Bucks + Buck-Boost + Boost + LDO + LED Driver + I2C Control + Pushbutton Control = Complete, High Power and
Flexible Power Management Solution
The LTC®3675 is a highly integrated general-purpose power management solution for high power single cell Lithium-Ion/Polymer systems. The device features seven independent rails plus LED driver, with I2C control, flexible sequencing and fault monitoring in a compact 28mm2 QFN package. The device’s seven channels include four high current, high efficiency step-down regulators, a high current/high efficiency buck-boost regulator, a high current/high efficiency boost regulator and one always-on 25m A LDO.
Features n Four Monolithic Synchronous Buck DC/DCs LTC3675 Demo Board (1A/1A/500m A/500m A) n Adjacent Buck DC/DCs Can Be Paralleled to Deliver Up to 2× Current with a Single Inductor n Independent 1A Buck-Boost and 1A Boost DC/DCs n Dual String I2C-Controlled LED Driver
n Always-On 25m A LDO
n I2C Programmable Output Voltage, Operating Mode and
Switch Node Slew Rate for All DC/DCs
n I2C Read Back of DC/DC, LED Driver, Fault Status 25mm
n I2C Programmable VIN and Die Temperature Warnings
n Maskable Interrupts to Report DC/DC Errors,
Input Undervoltage and Die Temperature Warnings n Pushbutton ON/OFF/RESET
n Low Quiescent Current: 16µA (All DC/DCs Off)
n Thermally Enhanced, 4mm × 7mm × 0.75mm
44-Lead QFN Package
Applications
n High Power (5W to 10W) Single Cell
Li-Ion/Polymer Applications n Portable Industrial Applications,
Handy Terminals, Portable Instruments n Multioutput Low Voltage Power Supplies
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Page Summary Contents For LINEAR 2PB_3675 Configurable 7-Channel High Power PMIC Owner's Manual & User Guide
Manual Details
| Brand | High Power |
|---|---|
| Pages | 2 |
| File Size | 916.12 KB |
| Published | May 21, 2026 |
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Frequently Asked Questions
What is the minimum single-cell voltage range for this module?
It operates with high power single cell Lithium-Ion/Polymer systems.
Does it have built-in LED driving capabilities?
Yes, it features a dual string I²C-controlled LED Driver capable of controlling up to 20 LEDs.
Can the output rails be expanded for higher current needs?
Adjacent Bucks can be paralleled using a single inductor to deliver double the current.
What advanced control and monitoring features are available?
It includes I²C programmability for voltage, operating mode, fault status read-back, and temperature warnings.