Converter IC. MB39A112 Datasheet

MB39A112 IC. Datasheet pdf. Equivalent

Part MB39A112
Description 3-ch DC/DC Converter IC
Feature MB39A112 3-ch DC/DC Converter IC The MB39A112 is a 3-channel DC/DC converter IC using pulse width m.
Manufacture Cypress
Datasheet
Download MB39A112 Datasheet



MB39A112
MB39A112
3-ch DC/DC Converter IC
The MB39A112 is a 3-channel DC/DC converter IC using pulse width modulation (PWM) , and the MB39A112 is suitable for down-
conversion.
3-channel is built in TSSOP-20P package. Each channel can be controlled and soft-start.
The MB39A112 contains a constant voltage bias circuit for output block, capable of implementing an efficient high-frequency DC/DC
converter. It is ideal for built-in power supply such as ADSL modems.
Features
Supports for down-conversion (CH1 to CH3)
Power supply voltage range
: 7 V to 25 V
Error amplifier threshold voltage
: 1.00 V ± 1% (CH1)
: 1.23 V ± 1% (CH2, CH3)
Oscillation frequency range
: 250 kHz to 2.6 MHz
Built-in soft-start circuit independent of loads
Built-in timer-latch short-circuit protection circuit
Built-in totem-pole type output for P-channel MOS FET devices
Built-in constant voltage (VCCO - 5 V) bias circuit for output block
Package
20-pin plastic TSSOP
(FPT-20P-M06)
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-08829 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 25, 2019



MB39A112
MB39A112
Contents
Pin Assignment ................................................................ 3
Pin Description ................................................................. 4
Block Diagram .................................................................. 5
Absolute Maximum Ratings ............................................ 6
Recommended Operating Conditions ............................ 6
Electrical Characteristics ................................................. 7
Typical Characteristics .................................................... 9
Function .......................................................................... 12
DC/DC Converter Function ....................................... 12
Protective Function .................................................... 12
Setting The Output Voltage ........................................... 14
Setting The Triangular Oscillation Frequency............. 14
Setting The Soft-start And Discharge Times ............... 15
Treatment Without Using CS Terminal ......................... 16
Setting Time Constant For Timer-latch
Short-circuit Protection Circuit ..................................... 17
Treatment Without Using CSCP Terminal .................... 18
I/O Equivalent Circuit ..................................................... 19
Application Example ...................................................... 20
Parts List ......................................................................... 21
Selection Of Components .............................................. 22
Reference Data ............................................................... 32
Usage Precaution ........................................................... 35
Ordering Information ...................................................... 35
Package Dimension ....................................................... 36
Document History ........................................................... 37
Sales, Solutions, and Legal Information ...................... 38
Document Number: 002-08829 Rev. *C
Page 2 of 38





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