Position: Home  > All Categories> Integrated Circuits (ICs) > L4973D3.3

L4973D3.3

Switching Converters, Regulators & Controllers 3.3V 3.5A Step-Down

product image

L4973D3.3 Picture
See larger image
SeekIC No. : 00586178 Detail

L4973D3.3: Switching Converters, Regulators & Controllers 3.3V 3.5A Step-Down

L4973D3.3 Data Sheet

floor Price/Ceiling Price

US $ 1.86~2.03 / Piece | Get Latest Price
Part Number:
L4973D3.3
Mfg:
STMicroelectronics
Supply Ability:
5000

Price Break

  • Qty
  • 0~150
  • 150~250
  • 250~500
  • Unit Price
  • $2.03
  • $1.94
  • $1.86
  • Processing time
  • 15 Days
  • 15 Days
  • 15 Days
View more price & deliveries
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: 2024/10/27

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

Quick Details

Output Voltage : 50 V Mounting Style : SMD/SMT
Package / Case : SO-20 Packaging : Tube    

Description

Output Current :
Output Power :
Input Voltage :
Switching Frequency :
Operating Temperature Range :
Mounting Style : SMD/SMT
Packaging : Tube
Package / Case : SO-20
Output Voltage : 50 V


Features:

·UPTO3.5ASTEPDOWNCONVERTER
·OPERATING INPUT VOLTAGE FROM 8V TO 55V
·3.3V AND 5.1V (±1%) FIXED OUTPUT, AND ADJUSTABLE OUTPUTS FROM:0V TO 50V (3.3V type) 5.1V TO 50V (5.1 type)
·FREQUENCYADJUSTABLE UP TO300KHz
·VOLTAGEFEED FORWARD
·ZERO LOAD CURRENT OPERATION (min 1mA)
·INTERNAL CURRENT LIMITING (PULSE BY PULSE AND HICCUPMODE)
·PRECISE 5.1V (1.5%) REFERENCE VOLTAGE EXTERNALLY AVAILABLE
·INPUT/OUTPUT SYNCHRONIZATION FUNCTION
·INHIBIT FOR ZERO CURRENT CONSUMPTION (100mA Typ. at VCC = 24V)
·PROTECTION AGAINST FEEDBACK DISCONNECTION
·THERMAL SHUTDOWN
·OUTPUT OVERVOLTAGEPROTECTION
·SOFT START FUNCTION


Pinout

Connection Diagram




Specifications

Symbol
Parameter
Value
Unit
DIP-18
S0-20
V7,V8
V9,V8
 Input voltage
58
V
V2,V3
V2,V3
 Output DC voltage
Output peak voltage at t = 0.1s f=200KHz
-1
-5
V
V
I2,I3
I2,I3
 Maximum output current
int. limit.
V9-V8
V10-V8
  
14
V
V9
V10
 Bootstrap voltage
70
V
V11
V12
 Analogs input voltage (VCC = 24V)
12
V
V17
V19
 Analogs input voltage (VCC = 24V)
13
V
V12
V13
 (VCC = 20V)
6
-0.3
V
V
V18
V20
 (VCC = 20V)
5.5
-0.3
V
V
V10
V11
 Inhibit
Vcc
-0.3
V
V
Ptot
 Power dissipation a Tpins 90°C
(Tamb = 70°C no copper area)
(Tamb = 70°C 4cm copper area on PCB)		 DIP
12+3+3
5
1.3
2
W
W
W
Power dissipation a Tpins = 90°C SO20
4
W
Tj,Tstg
 Junction and storage temperature
-40to150
°C



Description

The L4973 is a step down monolithic power switching regulator delivering 3.5A at fixed voltages of 3.3V or 5.1V and using a simple external divider output adjustable voltage up to 50V.

Realized in BCD mixed technology, L4973  uses an internal power D-MOS transistor (with a typical Rdson of 0.15ohm) to obtain very high efficiency and very fast switching times.Switching frequency up to 300KHz are achievable (the maximum power dissipation of the packages must be observed).

A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 40V cover the majority of the today applications.

Features of this new generation of DC-DC converter L4973  includes pulse by pulse current limit, hiccup mode for output short circuit protection, voltage feed forward regulation, soft start, input/output synchronization, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.

Packages available are in plastic dual in line, DIP-18 (12+3+3) for standard assembly, and SO20 (12+4+4) for SMD assembly.




Parameters:

Technical/Catalog InformationL4973D3.3
VendorSTMicroelectronics
CategoryIntegrated Circuits (ICs)
TypeStep-Down (Buck)
Number of Outputs1
Voltage - Input8 ~ 55 V
Voltage - Output3.3V, 0.5 ~ 50 V
Current - Output3.5A
Power - Output4W
Package / Case20-SOIC (7.5mm Width)
PackagingTube
Internal Switch(s)Yes
SynchronousYes
Rds (On)150 mOhm
Operating Temperature-40°C ~ 150°C
Frequency - Switching100kHz ~ 300kHz
Drawing Number*
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names L4973D3 3
L4973D33



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 :
Kits
IT243
UVSC-110-4E1
Connectors, Interconnects
ASP-134488-01
WM4078-ND
Memory Cards, Modules
WT32
VTL5C7
Optical Inspection Equipment
AA924
A21K4B
Computers, Office - Components, Accessories
DS-4008HCI
LB104V03(A1)
Batteries, Chargers, Holders
ICR18650-28A
ICR18650-26F/h
View more