LTC3859ALEUHF#PBF External Power Switch Boost Controllers by Analog Devices

Status: Production
Series: LTC3859AL
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LTC3859AL is a high performance triple output (buck/buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of up to 850kHz. The LTC3859AL operates from a wide 4.5V to 38V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC3859AL can operate from an input supply as low as 2.5V after start-up.The 28μA no-load quiescent current extends operating runtime 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 LTC3859AL features a precision 0.8V reference for the bucks, 1.2V reference for the boost and a power good output indicator. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.Compared to the LTC3859 and the LTC3859A, the LTC3859AL is fully pin-compatible, but with lower Burst Mode operation IQ (28µA with one channel on). Quiescent Current (Burst Mode) Notes LTC3859AL 28μA-One channel on, Buck 38μA-All three channels on Internal clamp on the INTVCC pin LTC3859A 55μA-One channel on, Buck 80μA-All three channels on Internal clamp on the INTVCC pin. For new designs, we recommend LTC3859AL LTC3859 55μA-One channel on, Buck 80μA-All three channels on For new designs, we recommend LTC3859AL

Where to Buy

Prices starting from US$5.97

Distributor Stock
Logo for Analog Devices
Analog Devices
from US$5.97
22,152
in stock
Buy Now
Logo for Rochester Electronics
Rochester Electronics
from US$6.28
338
in stock
Buy Now
Logo for Richardson RFPD
Richardson RFPD
from US$7.91
0
in stock
Buy Now
Buy Now

Features

Low Operating IQ: 28μA (One Channel On)
Dual Buck Plus Single Boost Synchronous Controllers
Outputs Remain in Regulation Through Cold Crank Down to 2.5V
Wide Bias Input Voltage Range: 4.5V to 38V
Buck Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
Boost Output Voltage Up to 60V
RSENSE or DCR Current Sensing
100% Duty Cycle for Boost Synchronous MOSFET Even in Burst Mode® Operation
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode Operation at Light Loads
Very Low Buck Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Low Shutdown IQ: 10μA
Small 38-Lead 5mm × 7mm QFN and TSSOP Packages

Last 6 months Inventory & Pricing History


Alternative Descriptions

3x Out, Buck/Buck/Boost Sync C | Analog Devices
DC/DC Cntrlr Triple-OUT Step Down/Step Up 900kHz Automotive 38-Pin QFN EP Tube | Richardson RFPD


LTC3859ALEUHF#PBF Power Management ICs - PMIC by Linear Technology

DC-DC CONTROLLER, BUCK-BOOST, 900KHZ, QFN-38

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

Specifications

Supply Voltage Min 4.5V
Supply Voltage Max 38V
No. of Outputs 3 Output
Duty Cycle (%) 100%
Controller IC Case Style QFN
No. of Pins 38Pins
Switching Frequency 585kHz
RoHS Compliant Yes

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LTC3859ALEUHF#PBF?

Additional datasheets, footprints and schematics for LTC3859ALEUHF#PBF are listed on our Part Details page. You can also find images and similar parts to LTC3859ALEUHF#PBF on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LTC3859ALEUHF#PBF on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LTC3859ALEUHF#PBF price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does LTC3859ALEUHF#PBF fall under?

The LTC3859ALEUHF#PBF is listed under External Power Switch Boost Controllers.

Can I view similar or alternative parts?

You can view similar parts to LTC3859ALEUHF#PBF when available in the External Power Switch Boost Controllers 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 LTC3859ALEUHF#PBF you can contact the distributor directly for product support, shipping queries etc.

Is the LTC3859ALEUHF#PBF RoHS compliant?

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

Which authorised distributors for LTC3859ALEUHF#PBF have stock available?

Authorised distributors including Analog Devices, Rochester Electronics and Richardson RFPD have stock available or on a lead time for LTC3859ALEUHF#PBF.

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

Stock availability and lead times will be displayed for LTC3859ALEUHF#PBF often in real-time on the comparison pages.

What if I can't find stock of LTC3859ALEUHF#PBF?

You can fill out our help required form which you can use to request a quote for LTC3859ALEUHF#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.