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ADI LT3971IDD-3.3#TRPBF product image
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ADI LT3971IDD-3.3#TRPBFRoHS

Manufacturer
ADI
MPN
LT3971IDD-3.3#TRPBF
LCSC Part #
C671776
Packaging
DFN-10-EP(3x3)
Customer #
Key Attributes
2MHz Step-down type Fixed 3.3V 1.2A DFN-10-EP(3x3) Voltage Regulators - DC DC Switching Regulators RoHS
Datasheetpdf iconADI LT3971IDD-3.3#TRPBF
Alternative Parts9
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QtyUnit Price(Reference Only)Total Amount
1+$ 5.6322$ 5.63
200+$ 2.181$ 436.20
500+$ 2.1038$ 1051.90
1,000+$ 2.0652$ 2065.20
Standard Packaging2500/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerADI
PackagingDFN-10-EP(3x3)
Operating Temperature-40℃~+125℃@(TJ)
Frequency - Switching2MHz
FunctionStep-down type
Number of Outputs1
FeaturesFrequency synchronization;Light load efficient mode;Operating status indication
TopologyBuck
Output TypeFixed
Operating Voltage4.3V~38V
Switch tube (built-in/external)Built-in
Output Voltage3.3V
Output Current1.2A
Quiescent Current2.8uA
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Introduction

AI Translation

The LT3971 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V. Low quiescent current design consumes only 2.8µA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 0.33Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. An accurate 1V threshold enable pin can be used to shut down the LT3971, reducing the input supply current to 700nA. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. The LT3971 is available in small 10-lead MSOP and 3mm×3mm DFN packages with exposed pads for low thermal resistance. A 16-lead MSOP is also offered which has enhanced pin-to-pin fault tolerance.

Features

AI Translation
  • Ultralow Quiescent Current: 2.8µA I₀ Regulating 12VIN to 3.3V₀UT
  • Fixed Output Voltages: 3.3V, 5V
  • 2.1µA I₀ Regulating 12VIN to 3.3V₀UT
  • Low Ripple Burst Mode Operation: Output Ripple < 15mVP-P
  • Wide Input Voltage Range: 4.3V to 38V
  • 1.2A Maximum Output Current
  • Adjustable Switching Frequency: 200kHz to 2MHz
  • Synchronizable Between 250kHz to 2MHz
  • Fast Transient Response
  • Accurate 1V Enable Pin Threshold
  • Low Shutdown Current: I₀ = 700nA
  • Power Good Flag
  • Soft-Start Capability
  • Internal Compensation
  • Output Voltage: 1.19V to 30V
  • Small Thermally Enhanced 10-Lead MSOP, 16-Lead MSOP and (3mm×3mm) DFN Packages

Applications

AI Translation
  • Automotive Battery Regulation
  • Power for Portable Products
  • Industrial Supplies

Alternative Parts

MPNManufacturerPackagingAvailabilityUnit Price
LM53601NQDSXRQ1TIWSON-10-EP(3x3)10$ 6.367
LT3971EDD-3.3#PBFADIDFN-10-EP(3x3)0$ 5.0796
LT3971EDD-3.3#TRPBFADIDFN-10-EP(3x3)0$ 5.0796
LT3971IDD-3.3#PBFADIDFN-10-EP(3x3)0$ 6.4409
A8591KEJTR-J-1ALLEGRODFN-10(3x3)0$ 3.3822
LM536013QDSXTQ1TIWSON-10-EP(3x3)0$ 3.6987
LM536013QDSXRQ1TIWSON-10-EP(3x3)0$ 2.386
LM53601NQDSXTQ1TIWSON-10-EP(3x3)0$ 8.4204
LM536013QUDSXRQ1TIWSON-10-EP(3x3)0$ 7.2393