LTC3851IGN#PBF External Power Switch Buck Controllers by Analog Devices

Status: Production
Series: LTC3851
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LTC3851 is a high performance synchronous step-down switching regulator 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 750kHz. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3851 features a precision 0.8V reference that is compatible with a wide 4V to 38V input supply range. The TK/SS pin ramps the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The MODE/PLLIN pin selects among Burst Mode operation, pulse skipping mode or continuous inductor current mode at light loads and allows the IC to be synchronized to an external clock.The LTC3851-1 is a version with a power good output signal instead of adjustable current limit. Features LTC3851 Not Recommended For New Designs LTC3851-1 Not Recommended For New Designs LTC3851A Adjustable Current Limit LTC3851A-1 PGOOD Output

Where to Buy

Prices starting from US$3.03

Distributor Stock
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Analog Devices
from US$3.32
8,940
in stock
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Richardson RFPD
from US$3.03
-
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Features

Wide VIN Range: 4V to 38V Operation
RSENSE or DCR Current Sensing
±1% Output Voltage Accuracy
Phase-Lockable Fixed Frequency: 250kHz to 750kHz
Dual N-Channel MOSFET Synchronous Drive
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Output Current Foldback Limiting
Output Overvoltage Protection
5V Internal Regulator
OPTI-LOOP® Compensation Minimizes COUT
Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads
Low Shutdown IQ: 20μA
VOUT Range: 0.8V to 5.5V
Thermally Enhanced 16-Lead MSOP, 16-Lead Narrow SSOP or 3mm × 3mm QFN Package

Alternative Descriptions

Sync Buck Sw Reg Cntr | Analog Devices
POWER MANAGEMENT IC | Richardson RFPD


LTC3851IGN#PBF Semiconductors - ICs by Linear Technology

CONTROLLER STEP DOWN SYNC 16QFN

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Supply Voltage Min 4V
Supply Voltage Max 38V
No. of Outputs 1 Output, 1Outputs
Duty Cycle (%) 99%
Controller IC Case Style SSOP
No. of Pins 16Pins
Switching Frequency 790kHz
Topology Synchronous Buck (Step Down)
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Accuracy % 1%
Adjustable Output Voltage Min 0.8V
Base Number 3851
Frequency 750kHz
Operating Temperature Range -40°C to +85°C
Output Voltage 5.5V
Output Voltage Max 5V
Primary Input Voltage 38V
Termination Type Surface Mount Device
Voltage Regulator Type Step Down (Buck)

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LTC3851IGN#PBF?

Additional datasheets, footprints and schematics for LTC3851IGN#PBF are listed on our Part Details page. You can also find images and similar parts to LTC3851IGN#PBF on this page.

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What category does LTC3851IGN#PBF fall under?

The LTC3851IGN#PBF is listed under External Power Switch Buck Controllers.

Can I view similar or alternative parts?

You can view similar parts to LTC3851IGN#PBF when available in the External Power Switch Buck Controllers range under the specifications section at the bottom of the details page.

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Is the LTC3851IGN#PBF RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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Authorised distributors including Analog Devices and Richardson RFPD have stock available or on a lead time for LTC3851IGN#PBF.

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