MB39C022N 查看數據表（PDF） - Cypress Semiconductor
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MB39C022N Datasheet PDF : 29 Pages
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MB39C022G/J/L/N
Contents
Description ............................................................................. 1
Features .................................................................................. 1
Applications ........................................................................... 1
1. Pin Assignment ................................................................ 3
2. Pin Descriptions ............................................................... 4
3. I/O Terminal Equivalent Circuit Diagram ........................ 5
4. Block Diagram .................................................................. 6
5. Function Descriptions ...................................................... 7
5.1 PFM/PWM Logic Control Block (CH1) ...................... 7
5.2 Level converter and Iout Comparator circuit (CH1) ... 7
5.3 Error Amp. circuit (CH1) ............................................ 7
5.4 LDO Block (CH2) ....................................................... 7
5.5 POR Block ................................................................. 7
5.6 Reference Voltage Block (VREF) .............................. 7
5.7 Under Voltage Lockout Protection Circuit Block
(UVLO) ........................................................................ 8
5.8 Over Temperature Protection Block (OTP) ............... 8
5.9 Control Block (CTL) ................................................... 8
6. Absolute Maximum Ratings ............................................ 9
7. Recommended Operating Conditions .......................... 10
8. Electrical Characteristics ............................................... 11
9. Test Circuit For Measuring Typical Operating
Characteristics ............................................................... 13
10. Application Notes ......................................................... 14
10.1 Selection of components ....................................... 14
10.2 DC/DC Output voltage setting ............................... 15
10.3 Power On Reset (POR) ......................................... 15
10.4 Power dissipation and heat considerations ........... 16
10.5 Board layout, design example ............................... 17
11. Example Of Standard Operation Characteristics ...... 18
11.1 DC/DC Conversion Efficiency ............................... 18
11.2 DC/DC Load Regulation ........................................ 18
11.3 DC/DC Line Regulation ......................................... 19
11.4 DC/DC Switching Waveform ................................. 19
11.5 LDO Load Regulation ............................................ 20
11.6 LDO Line Regulation ............................................. 20
11.7 LDO Power Supply Rejection Ratio ...................... 21
11.8 DC/DC Load Transient Waveforms ....................... 21
11.9 DC/DC Power MOS FET ON Resistance .............. 22
12. Application Circuits Examples .................................... 24
13. Usage Precautions ....................................................... 26
14. Ordering Information .................................................... 26
15. RoHS Compliance Information .................................... 26
16. Package Dimension ...................................................... 27
Document History ................................................................ 28
Sales, Solutions, and Legal Information ........................... 29
Document Number: 002-08460 Rev. *C
Page 2 of 29
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