Products
LTC7800
RECOMMENDED FOR NEW DESIGNSLow IQ , 60V, High Frequency Synchronous Step-Down Controller
- Part Models
- 6
- 1ku List Price
- Starting From $4.77
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Overview
- Wide VIN Range: 4V to 60V (65V Abs Max)
- Low Operating IQ : 50μA
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
- RSENSE or DCR Current Sensing
- Phase-Lockable Frequency (320kHz to 2.25MHz)
- Programmable Fixed Frequency (320kHz to 2.25MHz)
- Selectable Continuous, Pulse-Skipping or Low Ripple
- Burst Mode® Operation at Light Load
- Selectable Current Limit
- Very Low Dropout Operation: 98% Duty Cycle
- Adjustable Output Voltage Soft-Start or Tracking
- Power Good Output Voltage Monitor
- Output Overvoltage Protection
- Low Shutdown IQ : < 14μA
- Internal LDO Powers Gate Drive from VIN or EXTVCC
- No Current Foldback During Start-Up
- Small 20-Pin 3mm × 4mm QFN Package
The LTC7800 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage. A constant frequency current mode architecture allows a phase-lockable frequency of up to 2.25MHz.
The 50μA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC7800 features a precision 0.8V reference and power good output indicator. A wide 4V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. The output voltage of the LTC7800 can be programmed between 0.8V to 24V.
The TRACK/SS pin ramps the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous conduction mode at light loads.
Applications
- Automotive Always-On Systems
- Battery Powered Digital Devices
- Distributed DC Power Systems
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Analog Dialogue 1
Webcast 2
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 |
|---|---|---|---|
| LTC7800EUDC#PBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC7800EUDC#TRPBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC7800HUDC#PBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC7800HUDC#TRPBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC7800IUDC#PBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC7800IUDC#TRPBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) |
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/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC7800
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LTC7800
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.
