Main
Features
1. Description
Airbag Power Supply IC ATA6264 Preliminary
ATA6264 [Preliminary]
Figure 1-1. Block Diagram
V
VSAT
V
1.1 Block Description
ATA6264 [Preliminary]
2. Pin Configuration
Figure 2-1. Pinning QFP44
Table 2-1. Pin Description
ATA6264 [Preliminary]
3. Absolute Maximum Ratings
3. Absolute Maximum Ratings (Continued)
4. Functional Range
4.1 Protection Against Substrate Currents
5. Supply Currents
5.1 Discharger Circuit
5.2 Initial Programming of the ATA6264
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4929BAUTO01/07
5.3 Start-up and Power-down Procedure
V
V V
V
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6. Power Supply Sequencing
Figure 6-2. Block Diagram Power Supply Sequencing
V
V V
VCORE - Regulator
V
7. Charge Pump
VEVZ = 5.5V to 40V or VK30 = 5.5V to 40V, VK15 > 3V, VVINT = 3.7V to 5.47V
VVSAT, VVPERI and VVCORE are within functional range limits, Tj = 40C to 150C
Table 7-1. Electrical Characteristics Charge Pump
8. GKEY Function
Figure 8-2. Application With High Current Switch (GKEY Function Not Used)
VK15 = 3V to 40V, VK30 = 3.85V to 40V
VEVZ, VSAT, VPERI and VCORE are within functional range limits, Tj = 40C to 150C
Table 8-2. Electrical Characteristics GKEY Function
9. EVZ Step-up Regulator
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ATA6264 [Preliminary]
VK15 = 3V to 40V, VK30 = 5V to 40V, CGEVZ = 200 pF to 2 nF, VINT = 3.7V to 5.47V
VSAT, VPERI and VCORE are within functional range limits, Tj = 40C to 150C
Table 9-1. Electrical Characteristics EVZ Step-up Regulator
Table 9-1. Electrical Characteristics (Continued) EVZ Step-up Regulator
Table 9-1. Electrical Characteristics (Continued)EVZ Step-up Regulator
10. VSAT Power Supply
VEVZ = 5.5V to 40V, VCP > VEVZ + 7V, VINT = 3.7V to 5.45V
VK30, VPERI and VCORE are within functional range limits, Tj = 40C to +150C
Table 10-1. Electrical Characteristics VSAT Power Supply
Table 10-1. Electrical Characteristics (Continued) VSAT Power Supply
11. VPERI Power Supply
VSAT > 7.5V, VINT = 3.7V to 5.47V, VCORE < VPERI + 0.3V
VK30, VEVZ and VCORE are within functional range limits, Tj = 40C to 150C
Table 11-1. Electrical Characteristics VPERI Power Supply
12. VCORE Power Supply
VEVZ = 5.5V to 40V or VK30 = 5.5V to 40V, VCP > VEVZ + 7V or VCP > VK30 + 7V, VPERI >V
VSAT is within functional range limits, Tj = 40C to 150C
Table 12-1. Electrical Characteristics VCORE Power Supply
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Table 12-1. Electrical Characteristics (Continued) VCORE Power Supply
13. USP Comparator for General Purpose
14. Reference Voltage and Reference Current Generation
15. Reset Function (Pin RESQ and Pin RESQ2)
Figure 15-2. Functional Principle of RESQ, RESQ2
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Figure 15-4. Application Example
VEVZ = 5.5V to 40V, VPERI = 1V to 5.5V, VINT = 3.7V to 5.47V
VK30, VSAT, and VCORE are within functional range limits, Tj = 40C to 150C
Table 15-1. Reset Truth Table
Table 15-2. Electrical Characteristics Reset Function (Pin RESQ and Pin RESQ2)
Table 15-2. Electrical Characteristics (Continued) Reset Function (Pin RESQ and Pin RESQ2)
16. Watchdog Function
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Figure 16-4. Watchdog Trigger Functional Principle (Unsuccessful Watchdog Trigger)
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VPERI > Reset threshold, VCORE > Reset threshold
VK30, VEVZ and VVSAT are within functional range limits, Tj = 40C to 150C
Table 16-2. Electrical Characteristics Watchdog Function
Figure 16-5. Watchdog Trigger
17. LIN/ISO 9141 Interfaces
Table 17-1. Electrical Characteristics LIN/ISO 9141 Interfaces
Table 17-1. Electrical Characteristics (Continued)LIN/ISO 9141 Interfaces
Figure 17-2. Timing LIN/ISO 9141 Interface
Table 17-1. Electrical Characteristics (Continued)LIN/ISO 9141 Interfaces
18. Voltage/Current Sources (IASGx Sources)
Figure 18-1. Functional Principle of the IASG Interface
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VK30 and VVSAT are within functional range limits, Tj = 40C to 150C
As defined in Section 4. Functional Range on page 8, CIASGx 10 nF and 825RISENS 5k
+
Table 18-1. Electrical Characteristics Voltage/Current Sources (IASGx Sources)
Table 18-1. Electrical Characteristics (Continued)Voltage/Current Sources (IASGx Sources)
ATA6264 [Preliminary]
19. AMUX (Analog Multiplexer for Voltage Measurements)
Table 19-1. Electrical Characteristics AMUX (Analog Multiplexer for Voltage Measurements)
ATA6264 [Preliminary]
20. UZP Buffer
Table 20-1. Electrical Characteristics UZP Buffer
21. Chip Temperature Measurement
22. Serial Interface Commands
22.1 Overview
Table 22-1. Electrical Characteristics (Continued) SerialInterface Commands
Figure 22-1. Timing Serial Interface
22.2 Set Commands
#16#1
Table 22-2. Set of Serial Interface Commands
Table 22-3. Key Latch Commands
Table 22-4. Watchdog Commands
Table 22-5. Switch Commands
Table 22-6. Initial Programming (IP Command)
Table 22-7. Diagnosis Commands
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22.3 Serial Interface Status Register
Table 22-11. Information Provided by the Itemized Bits of the Status Register
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23. Test Mode
24. Application Circuits
Figure 24-1. Overview of a Typical Airbag System
4929BAUTO01/07
Figure 24-2. Typical Application Circuit
ATA6264
26. Package Information
25. Ordering Information
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28. Table of Contents
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