L4954_10 STMICROELECTRONICS [STMicroelectronics], L4954_10 Datasheet
L4954_10
Related parts for L4954_10
L4954_10 Summary of contents
Page 1
Quad multifunction voltage regulator for car radio Features ■ 4 regulators: – (40 mA) low dropout – 8.5 V (175 mA) – (650 mA) – (100 mA) standby ■ 3 high side drivers: – ...
Page 2
Contents Contents 1 Block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . ...
Page 3
L4954 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 4
List of figures List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 5
L4954 1 Block and pins connection diagrams Figure 1. Block diagram V S STCAP RESET LVWarn EN1 EN2 EN3 GND Figure 2. Pins connection diagram (top view) VOLTAGE REFERENCE CURRENT LIMIT RESET LVW OUTPUT CONTROL THERMAL SHUTDOWN OVERVOLTAGE PROTECTION 15 ...
Page 6
Electrical specifications 2 Electrical specifications 2.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol V DC operating supply voltage S Transient supply overvoltages, rise time = 10 ms ,delay V S time = 115 ms V Overvoltage shutdown S,ovs ...
Page 7
L4954 2.4 Electrical characteristics Refer to the Figure 3: Application = 5 mA mA; I OUT5 otherwise specified. Table 4. Electrical characteristics Symbol Parameter V Operating supply voltage S I Maximum quiescent current q I Standby quiescent ...
Page 8
Electrical specifications Table 4. Electrical characteristics (continued) Symbol Parameter I Reg 2 quiescent current q2 I Current limit lim2 650 mA reg 3 output V Output voltage OUT5 ΔV Line regulation line ΔV Load regulation load V ...
Page 9
L4954 Table 4. Electrical characteristics (continued) Symbol Parameter 0.3 A HSD2 & HSD3 Maximum output current V sat saturation voltage I Quiescent current q I Current limit lim I Output leakage current leak2,3 SVR2 Reg 1supply voltage rejection LVWARN OUTPUT ...
Page 10
Functional description 3 Functional description The L4954 includes a monitoring circuit to warn the microprocessor if a low voltage or no voltage condition is occurring. When the voltage on the STCAP pin drops below 7.5 V (typ), the LVW output ...
Page 11
L4954 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ...
Page 12
Revision history 5 Revision history Table 5. Document revision history Date 12-Jul-2010 12/13 Revision 1 Initial release. Doc ID 17719 Rev 1 L4954 Changes ...
Page 13
L4954 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at ...