LTC3788

PRODUCTION

2-Phase, Dual Output Synchronous Boost Controller

Part Models: 4
1ku List Price: Starting From $4.23

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Part Details

Synchronous Operation for Highest Efficiency and Reduced Heat Dissipation
Wide Input Range: 4.5V to 38V (40V Abs Max) and Operates Down to 2.5V After Start-Up
Output Voltages Up to 60V
±1% 1.2V Reference Voltage
R_SENSE or Inductor DCR Current Sensing
100% Duty Cycle Capability for Synchronous MOSFET
Low Quiescent Current: 125μA
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Current Limit
Adjustable Output Voltage Soft-Start
Power Good Output Voltage Monitors
Low Shutdown Current I_Q: <8μA
Internal LDO Powers Gate Drive from VBIAS or EXTV_CC
Thermally Enhanced Low Profile 32-Pin 5mm × 5mm QFN Package

The LTC3788 is a high performance 2-phase dual synchronous boost converter controller that drives all N-channel power MOSFETs. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, allowing the LTC3788 to be used in high power boost applications.

A constant-frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. OPTI-LOOP^® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3788 features a precision 1.2V reference and dual power good output indicators. A 4.5V to 38V input supply range encompasses a wide range of system architectures and battery chemistries.

Independent SS pins for each controller ramp the output voltages during start-up. The PLLIN/MODE pin selects among Burst Mode^® operation, pulse-skipping mode or continuous inductor current mode at light loads.

For a leaded 28-lead SSOP package with a fixed current limit and one PGOOD output, without phase modulation or a clock output, see the LTC3788-1 data sheet.


	CLKOUT/PHASMD	Adjustable Current Sense	Power Good	Package
LTC3788	Yes	Yes	2	5 × 5 QFN-32
LTC3788-1	No	No	1	SSOP-28

Applications

Industrial
Automotive
Medical
Military

Part Models: 4
1ku List Price: Starting From $4.23

Documentation

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
LTC3788EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3788EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3788IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3788IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC3788EUH#PBF	PRODUCTION
LTC3788EUH#TRPBF	PRODUCTION
LTC3788IUH#PBF	PRODUCTION
LTC3788IUH#TRPBF	PRODUCTION
Jul 31, 2020 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC3788EUH#PBF	PRODUCTION
LTC3788EUH#TRPBF	PRODUCTION
LTC3788IUH#PBF	PRODUCTION
LTC3788IUH#TRPBF	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3788
LTC3788-1

LTpowerCAD 1

LTC3788 Project - Dual Output Synchronous Boost Controller (5-10V to 24V @ 3A & 12V @ 6A)

Design tools for the following parts are available in LTpowerCAD:

LTC3788

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

LTC3788EUH Demo Board | 2-Phase, Dual Output, 5V to 24VIN, VOUT = 12V @ 10A and 24V @ 5A

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Product Details

Demonstration circuit DC1409 is DC/DC boost converter featuring the LTC3788 constant frequency current mode boost controller. The DC1409A operates over 5V to 24V input and provides 8A to 10A of output current at 12V output. Also, the DC1409A provides a second 24V output capable of delivering 3A to 5A. The 300kHz constant frequency operation results in small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages. Also, the two outputs can be connected together to generate single output with two phase operation.

Resources

DC1409A - Demo Manual
1/20/2010

DC1409A - Design Files
1/20/2010

DC1409A - Schematic
1/20/2010

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LTC3788

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 2

Technical Articles 4

Video 1