LTC3788
PRODUCTION2-Phase, Dual Output Synchronous Boost Controller
- Part Models
- 4
- 1ku List Price
- Starting From $5.35
Overview
- 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
- RSENSE 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 IQ: <8μA
- Internal LDO Powers Gate Drive from VBIAS or EXTVCC
- 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
Documentation
Data Sheet 1
User Guide 1
Design Note 2
Technical Articles 4
Video 1
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) | ||
| LTC3788EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3788IUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3788IUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| 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) |
||
| 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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Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3788
- LTC3788-1
LTpowerCAD 1
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
Resources
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