IFX91041EJV33 INFINEON [Infineon Technologies AG], IFX91041EJV33 Datasheet

Page 1

... 1.8A DC/DC Step-Down Voltage Regulator 5.0V, 3.3V or Adjustable Output Voltage IFX91041EJV50 IFX91041EJV33 IFX91041EJV Rev. 1.01, 2009-10- ...

Page 2

... These devices are suited for use under the harsh automotive electronics environmental conditions featuring protection functions such as current limitation and overtemperature shutdown. Versions with a fixed 5.0V and 3.3V (IFX91041EJV50, IFX91041EJV33) output voltage as well as an adjustable device (IFX91041EJV) with 0.60V reference feedback voltage are available. The switching frequency of 370kHz allows to use small and inexpensive passive components. The IFX91041 features an enable function reducing the shut-down current consumption to < ...

Page 3

Block Diagram COMP SYNC Figure 1 Block Diagram Data Sheet EN 7 Enable Charge Pump Over Temperature Shutdown Feedforward Buck 3 Converter Oscillator 1 Bandgap Soft start ramp Reference generator IFX91041 2 GND 3 IFX91041 Block Diagram VS 8 ...

Page 4

... FB Feedback Input. For the adjustable output voltage versions (IFX91041EJV) connect via voltage divider to output capacitor. For the fixed voltage version (IFX91041EJV50, IFX91041EJV33) connect this pin directly to the output capacitor. 5 BDS Buck Driver Supply Input. Connect the bootstrap capacitor between this pin and pin BUO. ...

Page 5

... -40 150 j T -55 150 stg ESD t > 10s) may affect device reliability 5 IFX91041 Unit Conditions V – < 10s V – < 10s V IFX91041EJV50; IFX91041EJV33 V IFX91041EJV °C – °C – HBM Rev. 1.01, 2009-10-19 ...

Page 6

Functional Range Pos. Parameter 4.2.1 Supply Voltage 4.2.2 Output Voltage adjust range 4.2.3 Buck inductor 4.2.4 Buck capacitor 4.2.5 Buck capacitor ESR 4.2.6 Junction Temperature 1) See section ““Application Information” on Page Note: Within the functional range the IC ...

Page 7

Buck Regulator 5.1 Description The gate of the power switch is driven by the external capacitor connected to pin BDS (Buck Driver Supply) using the bootstrap principle. An integrated under voltage lockout function supervising the ’bootstrap’ capacitor voltage ensures ...

Page 8

... IFX91041EJV50 1) IFX91041EJV33 mA mA IFX91041EJV 1) V > IFX91041EJV > 1. IFX91041EJV 1) V > =0.6V CC µA IFX91041EJV V = 0.6V FB µA IFX91041EJV50, IFX91041EJV33 mΩ tested at 300 – Bootstrap voltage decreasing 12V GND BUO BDS Rev. 1.01, 2009-10-19 ...

Page 9

Electrical Characteristics: Buck Regulator = -40 °C to +125 °C, all voltages with respect to ground (unless otherwise specified 6 Pos. Parameter 5.2.19 Charge pump switch-off threshold 5.2.20 Maximum duty cycle ...

Page 10

Module Enable and Thermal Shutdown 6.1 Description With the enable pin the device can be set in off-state reducing the current consumption to less than 2µA. The enable function features an integrated pull down resistor which ensures that the ...

Page 11

Module Oscillator 7.1 Description The oscillator turns on the power switch with a constant frequency while the buck regulating circuit turns the power transistor off in every cycle with an appropriate time gap depending on the output and input ...

Page 12

Application Information Note: The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. 8.1 ...

Page 13

... IFX91041EJV50, IFX91041EJV33 with fixed Output Voltage Batt Ignition Key Terminal 15 7 Enable Over Temperature Shutdown Feedforward COMP 3 Converter C COMP SYNC Oscillator 1 R COMP Bandgap Reference Figure 5 Application Diagram IFX91041EJV50 or IFX91041EJV33 Note: This is a very simplified example of an application circuit. The function must be verified in the real application ...

Page 14

Adjustable Output Voltage Device Batt Ignition Key Terminal 15 Biasing & Enable Temperature Shutdown COMP 3 C COMP SYNC Oscillator 1 R COMP Bandgap Reference Figure 6 Application Diagram IFX91041EJV Note: This is a very simplified ...

Page 15

Package Outlines 8˚ MAX. 1.27 2) 0.41 ±0. 4.9 Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max. in dambar area 3) JEDEC reference ...

Page 16

Revision History Rev Rev.1.01 2009-10-19 Overview page: Inserted reference statement to TLE/TLF series. Rev.1.0 2009-05-04 Final data sheet Data Sheet 16 IFX91041 Revision History Rev. 1.01, 2009-10-19 ...

Page 17

Edition 2009-10-19 Published by Infineon Technologies AG 81726 Munich, Germany 2009 Infineon Technologies AG © All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With ...