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L4973V5.1

Switching Converters, Regulators & Controllers 5.1V 3.5A Step-Down

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SeekIC No. : 00585195 Detail

L4973V5.1: Switching Converters, Regulators & Controllers 5.1V 3.5A Step-Down

L4973V5.1 Data Sheet

floor Price/Ceiling Price

US $ 1.54~1.57 / Piece | Get Latest Price
Part Number:
L4973V5.1
Mfg:
STMicroelectronics
Supply Ability:
5000

Price Break

  • Qty
  • 0~800
  • 800~1000
  • Unit Price
  • $1.57
  • $1.54
  • Processing time
  • 15 Days
  • 15 Days
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Upload time: 2024/10/27

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Product Details

Quick Details

Output Voltage : 50 V Mounting Style : Through Hole
Package / Case : PDIP-18 Packaging : Tube    

Description

Output Current :
Output Power :
Input Voltage :
Switching Frequency :
Operating Temperature Range :
Packaging : Tube
Mounting Style : Through Hole
Package / Case : PDIP-18
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, L4974A 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 L4974A 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 InformationL4973V5.1
VendorSTMicroelectronics
CategoryIntegrated Circuits (ICs)
TypeStep-Down (Buck)
Number of Outputs1
Voltage - Input8 ~ 55 V
Voltage - Output5.1V, 5.1 ~ 50 V
Current - Output3.5A
Power - Output5W
Package / Case18-DIP
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 L4973V5 1
L4973V51
497 7249 5 ND
49772495ND
497-7249-5



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