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Cypress Semiconductor Electronic Components Datasheet

MB39C022N Datasheet

Buck DC/DC Converter + Low Noise LDO

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MB39C022G/J/L/N
Description
Buck DC/DC Converter
+ Low Noise LDO
The MB39C022 is a 2 channels power supply IC. It consists of one channel Buck DC/DC Converter and one channel LDO regulator.
The DC/DC converter has fast transient response with current mode control topology. Moreover, the integrated LDO provides an
auxiliary output supply for noise sensitive circuit.
Features
Power supply voltage range
: 2.5 V to 5.5 V
For Buck DC/DC included SW FET (CH1) : output 0.8 V to 4.5 V, 600 mA Max DC
For LDO (CH2)
: output 3.30 V (MB39C022G) 300 mA Max DC
: output 2.85 V (MB39C022J) 300 mA Max DC
: output 1.80 V (MB39C022L) 300 mA Max DC
: output 1.20 V (MB39C022N) 300 mA Max DC
Error amplifier threshold voltage
: 0.3 V ± (2.5 %) (CH1)
Fast line transient response with current mode topology (CH1)
PFM mode at light load current with VO1/VIN1 80 % (IO1 10 mA) (CH1)
Power-on-reset with 66 ms delay (CH1)
Built-in short circuit protect (CH2)
Built-in over current protect (CH1, CH2)
Built-in thermal protection function
Small size plastic SON-10 (3 mm × 3 mm) package
Applications
Portable Equipment
PND, GPS
PMP
Mobile TV, USB-dongle (CMMB, DVB-T, DMB-T)
Smart-phone
MP3
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-08460 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised June 19, 2017


Cypress Semiconductor Electronic Components Datasheet

MB39C022N Datasheet

Buck DC/DC Converter + Low Noise LDO

No Preview Available !

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


Part Number MB39C022N
Description Buck DC/DC Converter + Low Noise LDO
Maker Cypress
Total Page 29 Pages
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