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MFG:D2PAK;TO220BIC. Package Cooled:7850 D/C:ST
Part Number: L4957A
MFG: D2PAK;TO220BIC.
Package Cooled: 7850
D/C: ST
Description: The L4957A devices are Ultra Low
- Table of contents:
L4957A
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Suppliers
DataSheet
General Description
L4957A General Description
The L4957A devices are Ultra Low Drop Output linear regulators with an internal N-channel MOS of 200mΩ particulary suitable for low voltage/low dropout applications.
Operating with a input voltage from 3V to 14V they are capable to deliver up to 5A.
The devices are ideal for use as one of the sup-plies required by processor,for example they are the cost effective and efficient solution for conver-sion from 3.3V (rail bus) to 2.5V @ 2.5A or to 1.5V with high current rating.
Fast response transient minimise the output ca-pacitor value.A minimum of 22µF assures the stability in all load conditions.
The on-chip trimming technique offers a tighter voltage reference tolerance( with ±2% including line and load variation) beside to ensure a con-trolled short circuit current.Thermal shutdown provides protection against overload conditions that creates excessive junction temperature.
L4957A Maximum Ratings
| Symbol | Parameter | Value | Unit |
| VIN | Supply Input Voltage | 16 | V |
| Ti | Junction Temperature | -40 to+150 | °C |
| Tstg | Storage Temperature | -40 to+150 | °C |
L4957A Features
1.5V,1.8V,2.5V AND 3.3V FIXED OUTPUT VOLTAGE
3V TO 14V INPUT VOLTAGE RANGE
200mΩ Rdson TYPICAL @Tj=125°C
0.6V max.DROP-OUT AT 2A
EXCELLENT LOAD REGULATION
0.6mA QUIESCENT CURRENT AT ANYLOAD
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
3V TO 14V INPUT VOLTAGE RANGE
200mΩ Rdson TYPICAL @Tj=125°C
0.6V max.DROP-OUT AT 2A
EXCELLENT LOAD REGULATION
0.6mA QUIESCENT CURRENT AT ANYLOAD
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
L4957A Typical Application
-MOTHER BOARDS
-PROCESSOR I/O& SUPPLIES
-LOW VOLTAGE MEMORY & CHIP SET SUP-PLIES
-GRAPHIC & SOUND CARDS
-LOW VOLTAGE LOGIC SUPPLIES
-POST REGULATOR FOR SMPS
-PROCESSOR I/O& SUPPLIES
-LOW VOLTAGE MEMORY & CHIP SET SUP-PLIES
-GRAPHIC & SOUND CARDS
-LOW VOLTAGE LOGIC SUPPLIES
-POST REGULATOR FOR SMPS
L4957A Connection Diagram
L4957A
PDF/DataSheet Download
- Datasheet: L4957A
- File Size: 64917 KB
- Manufacturer: STMICROELECTRONICS [STMicroelectronics]
- Click here to Download
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