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LTC7801 4 V to 140 V Input Step-Down DC/DC Controllers
ADI’s PMIC for automotive, industrial, and telecommunication power systems
Analog Devices' LTC7801 is a high-performance step-down (buck) switching regulator DC/DC controller. This controller drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140 V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850 kHz.
The gate drive voltage can be programmed from 5 V to 10 V to allow the use of logic or standard-level FETs to maximize efficiency. An integrated switch in the top gate driver eliminates the need for an external bootstrap diode. An internal charge pump allows for 100% duty cycle operation.
The low 40 μA 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 LTC7801 features a precision 0.8 V reference and power good output indicator. The output voltage can be programmed between 0.8 V to 60 V using external resistors.
This controller comes in DFN or TSSOP packages that have operating temperature range of -40°C to +125°C or +150°C. The LTC7801 was designed for automotive, industrial, and telecommunication power systems.
- Output voltage range: 0.8 V to 60 V
- VIN range: 4 V to 140 V (150 V, abs max)
- Adjustable gate drive level: 5 V to 10 V (OPTI-DRIVE)
- Low operating IQ: 40 μA (shutdown = 10 μA)
- 100% duty cycle operation
- No external bootstrap diode required
- Selectable gate drive UVLO thresholds
- Onboard LDO or external NMOS LDO for DRVCC
- EXTVCC LDO powers drivers from VOUT
- Phase-lockable frequency (75 kHz to 850 kHz)
- Programmable fixed frequency (50 kHz to 900 kHz)
- Selectable continuous, pulse-skipping, or low ripple Burst Mode® operation at light loads
- Adjustable burst clamp
- Power good output voltage monitor
- Programmable input overvoltage lockout
- Automotive, industrial, and telecommunication power systems
- High voltage battery operated systems
Evaluation Board
| Image | Manufacturer Part Number | Description | Power - Output | Voltage - Output | Current - Output | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
 |  | DC2641A | EVAL BOARD FOR LTC7801 | - | 12V | 10A | 14 - Immediate | $183.50 | View Details |
LTC7801 Step-Down DC/DC Controllers
| Image | Manufacturer Part Number | Description | Package / Case | Supplier Device Package | Available Quantity | Price | View Details | ||
|---|---|---|---|---|---|---|---|---|---|
|  | LTC7801EFE#PBF | IC REG CTRLR SYNC BUCK 24TSSOP | 24-TSSOP (0.173", 4.40mm Width) Exposed Pad | 24-TSSOP | 70 - Immediate | $9.95 | View Details | |
| | LTC7801EFE#TRPBF | IC REG CTRLR SYNC BUCK 24TSSOP | 24-TSSOP (0.173", 4.40mm Width) Exposed Pad | 24-TSSOP | 1911 - Immediate | $9.95 | View Details | |
|  | LTC7801EUFD#PBF | IC REG CTRLR SYNC BUCK 24QFN | 24-WFQFN Exposed Pad | 24-QFN (4x5) | 4457 - Immediate | $9.54 | View Details | |
| | LTC7801EUFD#TRPBF | IC REG CTRLR SYNC BUCK 24QFN | 24-WFQFN Exposed Pad | 24-QFN (4x5) | 1992 - Immediate | $9.54 | View Details | |
| | LTC7801HFE#PBF | IC REG CTRLR SYNC BUCK 24TSSOP | 24-TSSOP (0.173", 4.40mm Width) Exposed Pad | 24-TSSOP | 375 - Immediate | $13.27 | View Details | |
| | LTC7801HUFD#PBF | IC REG CTRLR SYNC BUCK 24QFN | 24-WFQFN Exposed Pad | 24-QFN (4x5) | 215 - Immediate | $11.46 | View Details | |
| | LTC7801IFE#PBF | IC REG CTRLR SYNC BUCK 24TSSOP | 24-TSSOP (0.173", 4.40mm Width) Exposed Pad | 24-TSSOP | 99 - Immediate | $11.07 | View Details | |
| | LTC7801IFE#TRPBF | IC REG CTRLR SYNC BUCK 24TSSOP | 24-TSSOP (0.173", 4.40mm Width) Exposed Pad | 24-TSSOP | 3922 - Immediate | $11.07 | View Details | |
| | LTC7801IUFD#PBF | IC REG CTRLR SYNC BUCK 24QFN | 24-WFQFN Exposed Pad | 24-QFN (4x5) | 89 - Immediate | $10.76 | View Details |
United Kingdom