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ADI LT1939IDD#TRPBF product image
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ADI LT1939IDD#TRPBF

Manufacturer
ADI
MPN
LT1939IDD#TRPBF
LCSC Part #
C665586
Packaging
DFN-12-EP(3x3)
Customer #
Key Attributes
Step-down type 250kHz~2.2MHz Adjustable 2A DFN-12-EP(3x3) Voltage Regulators - Linear + Switching RoHS
Datasheetpdf iconADI LT1939IDD#TRPBF
RoHS Compliance1 documents available
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QtyUnit Price(Reference Only)Total Amount
1+$ 4.1719$ 4.17
10+$ 3.5722$ 35.72
30+$ 3.216$ 96.48
100+$ 2.8553$ 285.53
500+$ 2.6888$ 1344.40
1,000+$ 2.6148$ 2614.80
Standard Packaging2500/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - Linear + Switching
ManufacturerADI
PackagingDFN-12-EP(3x3)
Synchronous RectifierNo
FunctionStep-down type
Frequency - Switching250kHz~2.2MHz
Number of Outputs2
Output TypeAdjustable
Output Voltage-
Quiescent Current2.5mA
Operating Voltage3V~25V
Operating Temperature-40℃~+125℃
Output Current2A
TopologyBuck
FeaturesCycle-by-cycle current limiting;Frequency synchronization;Adjustable soft-start;Operating status indication;Built-in current sense resistor;Overcurrent Protection
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Introduction

AI Translation

The LT1939 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 25V makes the LT1939 suitable for regulating power from a wide variety of sources, including automotive batteries, industrial supplies and unregulated wall adapters. Resistor-programmable 250kHz to 2.2MHz frequency range and synchronization capability enable optimization between efficiency and external component size. Cycle-by-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking. The LT1939 contains an internal NPN transistor with feedback control which can be configured as a linear regulator or as a linear regulator controller. The LT1939’s low current shutdown mode (<12μA) enables easy power management in battery-powered systems.

Features

AI Translation
  • Wide Input Range: 3V to 25V
  • Short-Circuit Protected Over Full Input Range
  • 2A Output Current Capability
  • Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.2MHz
  • Soft-Start/Tracking Capability
  • Output Adjustable Down to 0.8V
  • Adjustable Linear Regulator/Driver with 13mA Output Capability
  • Power Good Comparator with Complementary Outputs
  • Low Shutdown Current: 12μA
  • Thermally Enhanced 3mm × 3mm DFN Package

Applications

AI Translation
  • Automotive Battery Regulation
  • Industrial Control
  • Wall Transformer Regulation
  • Distributed Power Regulation