Position: Home  > All Categories> Integrated Circuits (ICs) > LT1939

LT1939

Features: ` 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 1...

product image

LT1939 Picture
See larger image
SeekIC No. : 004400921 Detail

LT1939: Features: ` 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-...

LT1939 Data Sheet

floor Price/Ceiling Price

Get Latest Price
Part Number:
LT1939
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/11/20

add to my favourite

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Description



Features:

` 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: 12A
` Thermally Enhanced 3mm * 3mm DFN Package


Application

· Automotive Battery Regulation
· Industrial Control
· Wall Transformer Regulation
· Distributed Power Regulation



Pinout

Connection Diagram


Specifications

VIN, PG, PG Operating .................................. 25V/0.3V
SW ............................................................................VIN
BST ............................................................... 45V/0.3V
BST Pin Above SW ....................................................25V
LDRV, SHDN ..............................................................15V
FB, LFB, RT/SYNC ........................................................5V
SS, VC ......................................................................2.5V
Operating Junction Temperature Range (Notes 2, 6)
    LT1939EDD ........................................ 40 to 125
    LT1939IDD ......................................... 40 to 125
Storage Temperature Range .................. 65 to 150


Description

The LT®1939 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 effi ciency and external component size. Cycleby- 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 confi gured as a linear regulator or as a linear regulator controller.

The LT1939's low current shutdown mode (<12A) enables easy power management in battery-powered systems.




Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.
You may also be interested in :
Crystals and Oscillators
WT325BI0030.000000
2SB49
Line Protection, Backups
BX0023
A20B-1008-0550
Kits
IT243
UVSC-110-4E1
Power Supplies - Board Mount
HC-06
PM150RSA060-S81AH0G
Tools
TCP202
G084SN05 V.3
Computers, Office - Components, Accessories
DS-4008HCI
LB104V03(A1)
View more