Electronic Components Datasheet Search |
|
L4973V3 Datasheet(PDF) 3 Page - STMicroelectronics |
|
L4973V3 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 16 page PIN FUNCTIONS Powerdip SO20 NAME DESCRIPTION 11 12 COMP E/A output to be used for frequency compensation 10 11 INH A logic signal (active high) disables the device (sleep mode operation). If not used it must be connected to GND; if floating the device is disabled. 9 10 BOOT A capacitor connected between this pin and the output allows to drive the internal D-MOS. 18 20 SYNC Input/Output synchronization. 7,8 8,9 Vcc Unregulated DC input voltage 2,3 2,3 OUT Stepdown regulator output. 12 13 VFB Stepdown feedback input. Connecting the output directly to this pin results in an output voltage of 3.3V for the L4973V3.3 and 5.1V. An external resistive divider is required for higher output voltages. For output voltage less than 3.3V, see note ** and Figure 32. 16 18 V5.1 Reference voltage externally available. 4,5,6 13,14,15 4,5,6,7 14,15,16,17 GND Signal ground 1 1 OSC An external resistor connected between the unregulated input voltage and Pin 1 and a capacitor connected from Pin 1 to ground fixes the switching frequency. (Line feed forward is automatically obtained) ABSOLUTE 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 = 0.1 µs 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 -40 to 150 °C THERMAL DATA Symbol Parameter Powerdip SO20 Unit Rth(j-pin) Thermal Resistance Junction to pin Max. 12 15 °C/W Rth(j-amb) Thermal Resistance to Ambient Max. 60 (*) 80 (*) °C/W (*) Package mounted on board. L4973V3 - L4973V5 - L4973D3 - L4973D5 3/16 |
Similar Part No. - L4973V3 |
|
Similar Description - L4973V3 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |