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MFG:11000 Package Cooled:ST
Part Number: L4975A
MFG: 11000
Package Cooled: ST
Description: The L4975A is a stepdown monolithic power switching regulator delivering 5A at a voltage variable from...
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L4975A
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DataSheet
General Description
L4975A General Description
The L4975A is a stepdown monolithic power switching regulator delivering 5A at a voltage variable from 5.1 to 40V.
Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4975A 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.
L4975A Maximum Ratings
|
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 V |
|
I7 |
Maximum Output Current |
Internally Limited |
|
|
V6 |
Boostrap Voltage Boostrap 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°C |
30 |
W |
|
TJ,TSTG |
Junction and Storage Temperature |
-40to150 |
°C |
L4975A Features
·5A OUTPUT CURRENT
·5.1V TO 40V OUTPUT VOLTAGERANGE
·0 TO 90% DUTY CYCLE RANGE
·INTERNAL FEED-FORWARD LINE REGULATION
·INTERNAL CURRENT LIMITING
·PRECISE 5.1V ± 2% ON CHIP REFERENCE
·RESET AND POWER FAIL FUNCTIONS
·SOFT START
·INPUT/OUTPUT SYNC PIN
·UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
·PWM LATCH FOR SINGLE PULSE PER PERIOD
·VERYHIGH EFFICIENCY
·SWITCHING FREQUENCY UP TO 500KHz
·THERMAL SHUTDOWN
·CONTINUOUS MODE OPERATION
·5.1V TO 40V OUTPUT VOLTAGERANGE
·0 TO 90% DUTY CYCLE RANGE
·INTERNAL FEED-FORWARD LINE REGULATION
·INTERNAL CURRENT LIMITING
·PRECISE 5.1V ± 2% ON CHIP REFERENCE
·RESET AND POWER FAIL FUNCTIONS
·SOFT START
·INPUT/OUTPUT SYNC PIN
·UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
·PWM LATCH FOR SINGLE PULSE PER PERIOD
·VERYHIGH EFFICIENCY
·SWITCHING FREQUENCY UP TO 500KHz
·THERMAL SHUTDOWN
·CONTINUOUS MODE OPERATION
L4975A
PDF/DataSheet Download
- Datasheet: L4975A
- File Size: 368154 KB
- Manufacturer: STMICROELECTRONICS [STMicroelectronics]
- Click here to Download
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- 82025 KB
L4975A Relative Products
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