LT3973IMSE-5#PBF High Input Voltage Buck Regulators by Analog Devices

Status: Production
Series: LT3973
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LT3973 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 42V, and consumes only 2.5μA of quiescent current. A high efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control and logic circuitry. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 10mV in a typical application. A minimum dropout voltage of 530mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank. Current mode topology is used for fast transient response and good loop stability. A catch diode current limit provides protection against shorted outputs and overvoltage conditions, with thermal shutdown providing additional fault protection. An accurate programmable undervoltage lockout feature is available, producing a low shutdown current of 0.75μA. A power good flag signals when VOUT reaches 90% of the programmed output voltage. The LT3973 is available in small, thermally enhanced 10-lead MSOP and 3mm × 3mm DFN packages.

Where to Buy

Prices starting from US$4.87

Distributor Stock
Logo for Analog Devices
Analog Devices
from US$5.14
901
in stock
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Logo for Richardson RFPD
Richardson RFPD
from US$4.87
100
in stock
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Logo for Newark Electronics
Newark Electronics
from US$6.14
35
in stock
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Logo for element14
element14
from US$5.43
35
in stock
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Farnell
from US$5.37
35
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Features

Ultralow Quiescent Current
2.5μA IQ at 12VIN to 3.3VOUT
Low Ripple Burst Mode® Operation
Output Ripple < 10mVP-P
Wide Input Voltage Range: 4.2V to 42V Operating
Adjustable Switching Frequency: 200kHz to 2.2MHz
Integrated Boost and Catch Diodes
750mA Output Current
Excellent Start-Up and Dropout Performance
Fixed Output Voltages: 3.3V, 5V
1.9μA IQ at 12VIN
Accurate Programmable Undervoltage Lockout
Low Shutdown Current: IQ = 0.75μA
Internal Catch Diode Current Limit
Power Good Flag
Thermal Shutdown
Small, Thermally Enhanced 10-Lead MSOP and (3mm × 3mm) DFN Packages

Alternative Descriptions

42V, 750mA Buck Reg w/ 2.5µA Q | Analog Devices
DC TO DC CONVERTER | Richardson RFPD
Dc/Dc Conv, Buck, 2.15Mhz, 125Deg C | Newark Electronics
DC/DC CONV, BUCK, 2.15MHZ, 125DEG C | element14


LT3973IMSE-5#PBF Semiconductors - ICs by Linear Technology

BUCK 42VIN 2.2MHZ 0.75A 5V 10MSOP

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

Specifications

Topology Buck (Step Down)
Input Voltage Min 4.2V
Input Voltage Max 42V
DC / DC Converter IC Case DFN
No. of Pins 10Pins
Output Current 750mA
Output Voltage Nom. 5V
Switching Frequency 2.2MHz
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 3973
No. of Outputs 1Outputs
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +125°C
Output Voltage 5V
Primary Input Voltage 42V

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LT3973IMSE-5#PBF?

Additional datasheets, footprints and schematics for LT3973IMSE-5#PBF are listed on our Part Details page. You can also find images and similar parts to LT3973IMSE-5#PBF on this page.

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What category does LT3973IMSE-5#PBF fall under?

The LT3973IMSE-5#PBF is listed under High Input Voltage Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to LT3973IMSE-5#PBF when available in the High Input Voltage Buck Regulators range under the specifications section at the bottom of the details page.

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Is the LT3973IMSE-5#PBF RoHS compliant?

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

Which authorised distributors for LT3973IMSE-5#PBF have stock available?

Authorised distributors including Analog Devices, Richardson RFPD, Newark Electronics, element14 and Farnell have stock available or on a lead time for LT3973IMSE-5#PBF.

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