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Cypress Semiconductor Electronic Components Datasheet

MB39C011A Datasheet

2 ch DC/DC Converter IC

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MB39C011A
2ch DC/DC Converter IC with
Synchronous Rectification Datasheet
The MB39C011A is a two-channel DC/DC converter IC suitable for down-conversion that utilizes synchronous rectification and pulse
width modulation (PWM). The MB39C011A can operate over a wide range of power supply voltages (4.5 V to 17 V), making it optimal
as a built-in power supply in digital audio visual equipment and various other electronic devices.
Features
Wide range of power supply voltages: 4.5 V to 17 V
Supports high frequency operation: 2.0 MHz (Max)
Supports synchronous rectification method (CH1, CH2)
An arbitrary output voltage can be configured using an external resistance.
Built-in standby function: 0 μA (Typ)
Low current consumption: 2.2 mA (Typ, At quiescence)
Built-in soft-start circuit that can control each channel separately independent of the load
Built-in timer latch type short-circuit protection circuit (shares the soft-start capacitor)
Built-in totem pole type output stage for external P-ch/N-ch MOS FET devices
Package : TSSOP-16-pin
Applications
Digital TV
Photocopiers
Surveillance cameras
Set-top boxes (STB)
DVD players, DVD recorders
Projectors
IP phones
Vending machines
Consoles and other non-portable devices
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-08369 Rev. *B
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 24, 2017


Cypress Semiconductor Electronic Components Datasheet

MB39C011A Datasheet

2 ch DC/DC Converter IC

No Preview Available !

MB39C011A
Contents
1. Pin Assignment............................................................. 3
2. Pin Description ............................................................ 4
3. Block Diagram............................................................... 5
4. Absolute Maximum Ratings......................................... 6
5. Recommended Operating Conditions ........................ 7
6. Electrical Characteristics ............................................. 8
7. Typical Characteristics............................................... 10
8. Functional Description ............................................... 12
8.1 DC/DC Converter Block ................................................ 12
8.2 Protection Function ....................................................... 13
9. Switching Scheme Selection ..................................... 20
10. Setting The Output Voltage........................................ 21
11. Setting The Triangular Oscillation Frequency ......... 22
11.1 Power Dissipation and Thermal Design........................ 22
12. Setting The Soft-start And Short-circuit Detection
Times............................................................................ 24
13. VB Pin And VH Pin Connections In Condition
Of Vcc Voltage............................................................. 24
14. Design Of Phase Compensation Circuit ................... 26
14.1 Phase compensation circuit when low ESR capacitor is
used as output capacitor............................................... 26
14.2 Notes on Phase Compensation Circuit Constants........ 27
15. Handling the Unused Channel Pins when using
a Single Channel......................................................... 29
16. I/O Equivalent Circuit ................................................. 31
17. Example Application Circuit ...................................... 33
18. Parts List ..................................................................... 34
19. Part Selection .............................................................. 35
19.1 Coil selection ................................................................ 35
19.2 SW FET selection ......................................................... 36
19.3 Fly-back Diode Selection .............................................. 38
19.4 Output capacitor selection ............................................ 39
19.5 Input capacitor selection ............................................... 39
19.6 VB pin capacitor............................................................ 40
19.7 VH pin capacitor ........................................................... 40
20. PCB Layout ................................................................ 41
21. Reference Data............................................................ 43
22. Usage Precaution ....................................................... 45
22.1 Do not configure the IC over the maximum ratings ...... 45
22.2 Use the device within the recommended operating
conditions...................................................................... 45
22.3 Printed circuit board ground lines should be set up with
consideration for common Impedance.......................... 45
22.4 Take appropriate measures against static electricity .... 45
22.5 Do not apply negative voltages..................................... 45
23. Ordering Information.................................................. 46
24. EV Board Ordering Information................................. 46
25. RoHS Compliance Information Of Lead (Pb) Free
Version......................................................................... 47
26. Marking Format (Lead-free version) ........................ 47
27. Labeling Sample (Lead-free version) ....................... 48
28. MB39C011APFT-❏❏❏E1 Recommended Mounting
Conditions ................................................................... 49
28.1 Recommended Mounting Conditions............................ 49
28.2 Parameters for Each Mounting Method ........................ 50
29. Package Dimensions.................................................. 51
Document Number: 002-08369 Rev. *B
Page 2 of 53


Part Number MB39C011A
Description 2 ch DC/DC Converter IC
Maker Cypress Semiconductor
Total Page 30 Pages
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