MFG:STM Package Cooled:SQL-15 D/C:96+
MFG: STM
Package Cooled: SQL-15
D/C: 96+
Description: The L4977A is a stepdown monolithic power switching regulator delivering 7A at a voltage variable from...
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.
| 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 |
L4977A
PDF/DataSheet Download
IC CONV DC-DC STP-DWN 1A 16-SOIC
IC REG SW 1A STEPDOWN 16-SOIC
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