LTC3891EFE#PBF High Input Voltage Buck Regulators by Analog Devices

Status: Production
Series: LTC3891
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LTC3891 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 750kHz. 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 LTC3891 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 LTC3891 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.

Where to Buy

Prices starting from US$6.22

Distributor Stock
Logo for Newark
Newark Electronics
from US$7.39
5
in stock
Buy Now
Logo for element14 Singapore
element14
from US$7.81
5
in stock
Buy Now
Logo for Farnell UK
Farnell
from US$7.21
5
in stock
Buy Now
Logo for TME
TME
from US$6.22
0
in stock
Buy Now
Logo for Richardson RFPD
Richardson RFPD
from US$6.67
0
in stock
Buy Now
Buy Now

Features

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 (75kHz to 750kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Load
Selectable Current Limit
Very Low Dropout Operation: 99% 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 and TSSOP Packages

Last 6 months Inventory & Pricing History


Alternative Descriptions

Dc/Dc Ctrl, Sync Buck, 835Khz, 125Deg C | Newark Electronics
DC/DC CTRL, SYNC BUCK, 835KHZ, 125DEG C | element14
PMIC | TME
DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin TSSOP EP Tube | Richardson RFPD


LTC3891EFE#PBF Semiconductors - ICs by Linear Technology

BUCK 60VIN 900KHZ 0.8-24V 20TSSOP

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

Specifications

Supply Voltage Min 4V
Supply Voltage Max 60V
No. of Outputs 1 Output, 1Outputs
Duty Cycle (%) 99%
Controller IC Case Style TSSOP
No. of Pins 20Pins
Switching Frequency 900kHz
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)
Base Number 3891
Operating Temperature Range -40°C to +125°C
Output Current 5A
Output Voltage 24V
Primary Input Voltage 60V

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LTC3891EFE#PBF?

Additional datasheets, footprints and schematics for LTC3891EFE#PBF are listed on our Part Details page. You can also find images and similar parts to LTC3891EFE#PBF on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LTC3891EFE#PBF on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LTC3891EFE#PBF price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does LTC3891EFE#PBF fall under?

The LTC3891EFE#PBF is listed under High Input Voltage Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to LTC3891EFE#PBF when available in the High Input Voltage Buck Regulators range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the LTC3891EFE#PBF you can contact the distributor directly for product support, shipping queries etc.

Is the LTC3891EFE#PBF RoHS compliant?

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

Which authorised distributors for LTC3891EFE#PBF have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, TME and Richardson RFPD have stock available or on a lead time for LTC3891EFE#PBF.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for LTC3891EFE#PBF often in real-time on the comparison pages.

What if I can't find stock of LTC3891EFE#PBF?

You can fill out our help required form which you can use to request a quote for LTC3891EFE#PBF from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.