LTC3644/
LTC3644-2

Name: LTC3644
Brand: Analog Devices
Price: 4.25 USD
Availability: InStock

RECOMMENDED FOR NEW DESIGNS

Quad 17V, 1.25A Parallelable Synchronous Step-Down Regulator with Ultralow Quiescent Current

Data Sheet (Rev. A) Product Selection Table

Part Models: 8
1ku List Price: Starting From $4.25

Viewing:

Overview

Quad Step-down Outputs: 1.25A per Channel
Wide V_IN Range: 2.7V to 17V
Wide V_OUT Range: 0.6V to V_IN
1.25A/2.5A/3.75A/5A I_OUT Configurable with One Inductor
Integrated 300mΩ P-Channel/80mΩ N-Channel MOSFETs Provide Up to 93% Efficiency
No-Load Burst Mode Operation I_Q < 10µA with All Channels Enabled

Constant Frequency (1MHz/2.25MHz) with ±50% Frequency Synchronization Range
±1% Output Voltage Accuracy
Current Mode Operation for Excellent Line and Load Transient Response
Full Dropout Operation (100% Duty Cycle)
Phase Shift Programmable with External Clock
5mm × 5mm × 1.72mm BGA Package

Part Models: 8
1ku List Price: Starting From $4.25

Documentation

Data Sheet 1

LTC3644/LTC3644-2: Quad 17V, 1.25A Parallelable Synchronous Step-Down Regulator with Ultralow Quiescent Current Data Sheet (Rev.A) 04/08/2021

User Guide 1

DC2383A-B - Demo Manual (Rev.0) 02/28/2022

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
LTC3644EY#PBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644EY#TRPBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644EY-2#PBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644EY-2#TRPBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644IY#PBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644IY#TRPBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644IY-2#PBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3644IY-2#TRPBF	36-Lead BGA (5mm x 5mm x 1.72mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 21, 2021 - 21_0159 Ink Mark to Laser Mark Conversion for µModule
		PCN21_0159_Form Material_Report
LTC3644EY#PBF	PRODUCTION
LTC3644EY-2#PBF	PRODUCTION
LTC3644IY#PBF	PRODUCTION
LTC3644IY-2#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3644
LTC3644-2

LTpowerCAD 1

LTC3644 Example Design 12Vin to 2.5Vout1 3.3Vout2 1.8Vout3 5Vout4 1.25A Each

Design tools for the following parts are available in LTpowerCAD:

LTC3644

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

Quad 17V, 1.25A Synchronous Step-Down Regulator with Ultralow Quiescent Current

Buy Now View Details

Product Details

Demonstration circuit 2383A-B features the LT3644-2: the wide input and output voltage range, high efficiency and power density, quad 1.25A outputs DC/DC synchronous step-down monolithic regulator. The input voltage range of DC2383A-A is 2.7V to 17V. The default demo board setting of V_OUT1, V_OUT2, V_OUT3, V_OUT4 is 1.2V, 3.3V, 2.5V, and 1.8V at 1.25A maximum DC output current per channel respectively. There are two assembly versions. The DC2383A-B features LTC3644-2 which operates at an internally fixed frequency of 2.25MHz (Typ), while the DC2383A-A features LTC3644 which operates at an internally fixed frequency of 1MHz (Typ). Peak current limit is internally fixed at 2.2A typical per channel. Each channel comes with independent run pin control and power good indicators. Phase shift selection of either 0 degree or 180 degrees between switch rising edge of channels 1, 2 and channels 3, 4 is also available.

DC2383A-B provides optional onboard 0Ω jumpers to configure the LTC3644-2 as 4-phase dual 2.5A/2.5A outputs or 4-phase triple 2.5A/1.25A/1.25A outputs. Optional 0Ω jumpers connecting V_IN1 to V_IN2, V_IN3, and V_IN4 are available for users to operate selected channels of LTC3644-2 at different input voltages than V_IN1.

A user-selectable MODE/SYNC input is provided to allow users to trade off ripple noise for light load efficiency: pulse-skipping mode (PS) or Burst Mode^® operation delivers higher efficiency at light load while forced continuous conduction mode (FCM) is preferred for noise sensitive applications. The MODE/SYNC pin can also be used to synchronize the switching frequency to an external clock or set the phase shift between channels 1, 2 and channels 3, 4. Constant frequency; peak current mode control architecture; and an integrated, internal control loop compensation network allow very fast transient responses to line and load changes while maintaining loop stability.

The LTC3644-2 is available in a thermally enhanced, low profile 36-lead 5mm × 5mm BGA package.

It is recommended to read the LTC3644-2 data sheet and demo board manual prior to using or making any changes to DC2383A-B.

Resources

DC2383A-B - Design Files
2/28/2022

DC2383A-B - Schematic
2/28/2022

DC2383A-B - Demo Manual (Rev.0)
2/28/2022

LTC3644 | Quad 17V, 1.25A Synchronous Step-Down Regulator with Ultralow Quiescent Current

Buy Now View Details

Product Details

Demonstration circuit 2383A-A features the LTC3644: the wide input and output voltage range, high efficiency and power density, quad 1.25A outputs DC/DC synchronous step-down monolithic regulator. The input voltage range of DC2383A-A is 2.7V to 17V. The default demo board setting of V_OUT1, V_OUT2, V_OUT3, V_OUT4 is 1.2V, 3.3V, 2.5V and 1.8V at 1.25A maximum DC output current per channel. There are two assembly versions. The DC2383A-A features LTC3644 which operates at an internally fixed frequency of 1MHz (Typ), while the DC2383A-B features LTC3644-2 which operates at an internally fixed frequency of 2.25MHz (Typ). Peak current limit is internally fixed at 2.2A typical per channel. Each channel comes with independent run pin control and power good indicators. Phase shift selection of either 0 degree or 180 degrees between switch rising edge of channels 1, 2 and channels 3, 4 is also available.

DC2383A-A provides optional onboard 0Ω jumpers to configure the LTC3644 as 4-phase dual 2.5A/2.5A outputs or 4-phase triple 2.5A/1.25A/1.25A outputs. Optional 0Ω jumpers connecting V_IN1 to V_IN2, V_IN3, V_IN4 are available for users to operate selected channels of LTC3644 at different input voltages than V_IN1.

A user-selectable MODE/SYNC input is provided to allow users to trade off ripple noise for light load efficiency: pulse-skipping mode (PS) or Burst Mode^® operation delivers higher efficiency at light load while forced continuous conduction mode (FCM) is preferred for noise sensitive applications. The MODE/SYNC pin can also be used to synchronize the switching frequency to an external clock or set the phase shift between channels 1, 2 and channels 3, 4. Constant frequency, peak current mode control architecture and integrated internal control loop compensation network, allows very fast transient response to line and load changes while maintaining loop stability.

The LTC3644 is available in a thermally enhanced, low profile 36-lead 5mm × 5mm BGA package.

It is recommended to read the data sheet and demo manual of LTC3644 prior to using or making any changes to DC2383A-A.