LTC3892 - 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
- Wide VIN Range: 4.5V to 60V (65V Abs Max)
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 99% • VIN
- Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
- No External Bootstrap Diodes Required
- Low Operating IQ: 29μA (One Channel On)
- Selectable Gate Drive UVLO Thresholds
- Out-of-Phase Operation Reduces Required Input Capacitance and Power Supply Induced Noise
- Phase-Lockable Frequency: 75kHz to 850kHz
- Selectable Continuous, Pulse Skipping or Low Ripple Burst Mode® Operation at Light Loads
- Selectable Current Limit (LTC3892/LTC3892-2)
- Very Low Dropout Operation: 99% Duty Cycle
- Power Good Output Voltage Monitors (LTC3892/LTC3892-2)
- Low Shutdown IQ: 3.6μA
- Small 32-Lead 5mm × 5mm QFN Package (LTC3892/ LTC3892-2) or TSSOP Package (LTC3892-1)
AEC-Q100 data available for specific packages
The LTC®3892/LTC3892-1/LTC3892-2 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. Power loss and noise are minimized by operating the two controller output stages out-of-phase.
The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs and to maximize efficiency. Internal switches in the top gate drivers eliminate the need for external bootstrap diodes.
A wide 4.5V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Output voltages up to 99% of VIN can be regulated. OPTILOOP® compensation allows the transient response and loop stability to be optimized over a wide range of output capacitance and ESR values.
The 29μA no-load quiescent current extends operating run time in battery powered systems. For a comparision of the LTC3892 to the LTC3892-1 and LTC3892-2, see Table 1 in the Pin Functions section of this data sheet.
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricingsales office or authorized distributor.
Demo BoardsLinear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
|DC1998A||LTC3892EUHF Demo Board | Dual Sync Buck Controller, 6V ≤ VIN ≤ 60V; VOUT1 = 5V @ 8A, VOUT2 = 12V @ 5A||$175.00|
|DC2190A-A||LTC3892EFE-1 Demo Board | LTC3892-1(x2) 4-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 60A||$275.00|
|DC2190A-B||LTC3892EFE-1 Demo Board | 2-Phase Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A||Contact Factory|
|DC2493A||LTC3892EUH-2 Demo Board | 2-Phase Sync Buck Controller, 16V ≤ VIN ≤ 55V; VOUT = 12V @ 30A||$200.00|
Designed for Automotive and Transportation ApplicationsAEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
sales office or authorized distributor.
- Automotive and Industrial Power Systems
- Distributed DC Power Systems
- High Voltage Battery Operated Systems
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