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L9911I

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
This is information on a product in full production.
September 2015 DocID10990 Rev 13 1/20
L9911
Car alternator multifunction smart voltage regulator
Datasheet - production data
Features
Fully monolithic design
High side field driver
Thermal protection
Field short circuit protection
Protected diagnostic lamp driver
Protected high side relay driver
Complex diagnostics
Load response control
DFM output (field monitor)
Self start function
Description
The L9911 is a monolithic multifunction alternator
voltage regulator intended for use in automotive
application.
It includes the control section, the field power
stage, fault diagnostic circuit which drives a
warning lamp, and the protection against short
circuits
'!0'03
Multiwatt8
Table 1. Device summary
Order code Temp. range, °C Package Packing
L9911F
T
j
= -40 to +150 Multiwatt8 Tube
L9911I
L9911P
L9911V
L9911K
L9911U
www.st.com
Contents L9911
2/20 DocID10990 Rev 13
Contents
1 Circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Voltage regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Load response control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Self start function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Principle of phase regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Multiwatt 8 (pin 5 GND) package information . . . . . . . . . . . . . . . . . . . . . . 17
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DocID10990 Rev 13 3/20
L9911 List of tables
3
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 6. Load response control parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 7. Load response control timing options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 8. Correspondence of frequency (typical values) to application features . . . . . . . . . . . . . . . . 11
Table 9. Customization of L9911: combination of LRC, regulation, and application options . . . . . . 11
Table 10. Fault detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11. Multiwatt 8 (pin 5GND) package mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 12. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

L9911I

Mfr. #:
Buy L9911I
Manufacturer:
STMicroelectronics
Description:
Power Management Specialized - PMIC Car Alternator Reg Multifunction Volt
Lifecycle:
New from this manufacturer.
Delivery:
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