Purchase L4973D5.1, In-stock L4973D5.1 From SeekIC.
Part Number: L4973D5.1
Description: The L4973 is a step down monolithic power switching regulator delivering 3.5A at fixed voltages of 3.3...
- Table of contents:
L4973D5.1
-
Suppliers
DataSheet
General Description
L4973D5.1 General 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, the device 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 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.
L4973D5.1 Maximum Ratings
|
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 | ||
L4973D5.1 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
·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
L4973D5.1 Connection Diagram
L4973D5.1
PDF/DataSheet Download
- Datasheet: L4973D5.1
- File Size: 228092 KB
- Manufacturer: STMICROELECTRONICS [STMicroelectronics]
- Click here to Download
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