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L4977A

Switching Converters, Regulators & Controllers 5.1 to 40V 7.0 Amp

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SeekIC No. : 00586190 Detail

L4977A: Switching Converters, Regulators & Controllers 5.1 to 40V 7.0 Amp

L4977A Data Sheet

floor Price/Ceiling Price

US $ 4.55~5.44 / Piece | Get Latest Price
Part Number:
L4977A
Mfg:
STMicroelectronics
Supply Ability:
5000

Price Break

  • Qty
  • 0~165
  • 165~250
  • 250~500
  • 500~1000
  • Unit Price
  • $5.44
  • $5.11
  • $4.9
  • $4.55
  • Processing time
  • 15 Days
  • 15 Days
  • 15 Days
  • 15 Days
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Total Cost: $ 0.00

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Upload time: 2024/10/27

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Product Details

Quick Details

Output Voltage : 40 V Mounting Style : Through Hole
Package / Case : Multiwatt-15 Packaging : Tube    

Description

Output Current :
Output Power :
Input Voltage :
Switching Frequency :
Operating Temperature Range :
Packaging : Tube
Mounting Style : Through Hole
Output Voltage : 40 V
Package / Case : Multiwatt-15


Features:

· 7A OUTPUT CURRENT
· 5.1V TO 40V OUTPUT VOLTAGE RANGE
· 0 TO 90% DUTY CYCLE RANGE
· INTERNAL FEED-FORWARD LINE REGULATION
· INTERNAL CURRENT LIMITING
· PRECISE 5.1V ± 2% ON CHIP REFERENCE
· RESETAND POWER FAIL FUNCTIONS
· SOFT START
· INPUT/OUTPUT SYNC PIN
· UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
· PWM LATCH FOR SINGLE PULSE PER PERIOD
· VERY HIGH EFFICIENCY
· SWITCHING FREQUENCY UP TO 500KHz
· THERMAL SHUTDOWN
· CONTINUOUS MODE OPERATION


Specifications

Symbol Parameter
Value
Unit
V9 Input Voltage
55
V
V9 Input Operating Voltage
50
V
V7 Output DC Voltage
Output Peak Voltage at t = 0.1s f = 200KHz
-1
-7
V
I7 Maximum Output Current
Internally Limited
V6 Bootstrap Voltage
Bootstrap Operating Voltage
65
V9 + 15
V
V
V3,V12 Input Voltage at Pins 3, 12
12
V
V4 Reset Output Voltage
50
V
I4 Reset Output Sink Current
50
mA
V5,V10,V11,V13 Input Voltage at Pin 5, 10, 11, 13
7
V
I5 Reset Delay Sink Current
30
mA
I10 Error Amplifier Output Sink Current
1
A
I12 Soft Start Sink Current
30
mA
Ptot Total Power Dissipation at Tcase < 120
30
W
Tj, Tstg Junction and Storage Temperature

-40 to 150




Description

The L4977A is a stepdown monolithic power switching regulator delivering 7A at a voltage variable from 5.1 to 40V.

Realized with BCD mixed technology, the device uses a DMOSoutput transistor to obtain very high efficiency and very fast switching times. Features of the L4977A include reset and power fail for microprocessors,feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multiwatt plastic power package and requires few external components. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter components.




Parameters:

Technical/Catalog InformationL4977A
VendorSTMicroelectronics
CategoryIntegrated Circuits (ICs)
TypeStep-Down (Buck)
Number of Outputs1
Voltage - Input15 ~ 50 V
Voltage - Output5.1 ~ 40 V
Current - Output7A
Power - Output30W
Package / CaseMultiwatt-15 (Vertical, Bent and Staggered Leads)
PackagingTube
Internal Switch(s)Yes
SynchronousYes
Rds (On)-
Operating Temperature0°C ~ 125°C
Frequency - Switching200kHz ~ 500kHz
Drawing Number*
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names L4977A
L4977A
497 5336 5 ND
49753365ND
497-5336-5



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