5-Bit Programmable Synchronous Buck Converter Controller RT9223 h
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RT9223
5-Bit Programmable Synchronous Buck Converter Controller
RT9223 high efficiency synchronous switching regulator modern application. output controlled 5-bit programmed from 1.3V 2.05V 0.05V steps from 2.1V 3.5V 0.1V increments. switching controller drivers N-MOSFETs 200KHz frequency provides optimal solution size, efficiency cost application circuits. controller also offers integrated functions including PGOOD, output enable, overvoltage, internal digital-count soft start, currentlimiting protection chip.
Features
High Efficiency Synchronous N-MOSFET Driver Operating 200KHz 1.3V 2.05V (0.05V steps) 2.1V 3.5V (0.1V steps) Output Voltage Enable Input, PGOOD Output, OVP, Current-limiting Protection Internal Digital-count Soft Start
Applications
Power Supply Pentium
PowerPC
6x86
Alpha
Microprocessors
High-power 3.xV DC-DC Regulators Low-voltage Distributed Power Supplies Programmable Step-down Power Supplies
Ordering Information
RT9223 Package type SOP-20 Operating temperature range Commercial standard
Configurations
Part Number RT9223CS (Plastic SOP-20) Configurations
VIEW
PGOOD PGNDH
VID0 VID1 VID2 VID3 VID4 VSEN SHDN BSTH BSTL
PGNDL
DS9223-07 2001
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RT9223
Absolute Maximum Ratings
PGND Ambient Temperature Range Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, sec.) Package Thermal Resistance SOP-20, 87°C/W -0.3 +5.5V 0.3V -0.3 +14V +70°C +125°C +150°C 300°C
Electrical Characteristics
(VCC PGNDH PGNDL VSEN VOUT; (VCSP-VCSN) 60mV; 25°C) Parameter Switching Section Output Voltage Supply Voltage Supply Current Load Regulation Line Regulation Power Reset Trip Point Current Limit Voltage Oscillator Frequency Oscillator Duty Cycle Source Sink Source Sink Threshold Voltage Source Current Power Good Threshold Voltage Note: output voltage table. IOVP VOVP 3.0V VSEN Rising DMAX VBSTH VPGNDH VPGNDL VLIMIT VOUT VLOAD 0.8A VLINE 4.75V 5.25V Rising VCSP VCSN -4.3 -114 -5.5 -122 -115 Symbol Test Conditions Units
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DS9223-07 2001
RT9223
Function Block Diagram
SHDN CURRENT LIMIT
1.25V
70mV VID4 VID3 VID2 VID1 VID0 VSEN PGOOD OPEN DRAIN 200KHz SHOOTTHROUGH CONTROL BSTL DRIVER PGNDL OSCILLATOR BSTH PGNDH LEVEL SHIFT DRIVER
ERROR
DS9223-07 2001
www.richtek-ic.com.tw
RT9223
Description
Name PGOOD PGNDH PGNDL BSTL BSTH SHDN VSEN VID4 VID3 VID2 VID1 VID0
Function Small signal analog digital ground Power supply input High signal setting point +20% Open collector logic output; High within setting point Current sense input (Negative) Current sense input (Positive) High side drive GIND High side driver output connection side drive side driver output Supply side driver Supply high side driver Logic shutdown converter internal feedback chain Programming input (MSB) Programming input Programming input Programming input Programming input (LSB)
Note: logic level inputs outputs compatible.
www.richtek-ic.com.tw
DS9223-07 2001
RT9223
Table Output Voltage Program Test Output Voltage Conditions application circuit 43210 01111 01110 01101 01100 01011 01010 01001 01000 00111 00110 00101 00100 00011 00010 00001 00000 11111 11110 11101 11100 11011 11010 11001 11000 10111 10110 10101 10100 10011 10010 10001 10000 1.287 1.336 1.386 1.435 1.485 1.534 1.584 1.633 1.683 1.732 1.782 1.831 1.881 1.930 1.980 2.029 1.980 2.079 2.178 2.277 2.376 2.475 2.574 2.673 2.772 2.871 2.970 3.069 3.168 3.267 3.366 3.465 1.300 1.350 1.400 1.450 1.500 1.550 1.600 1.650 1.700 1.750 1.800 1.850 1.900 1.950 2.000 2.050 2.000 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 3.100 3.200 3.300 3.400 3.500 1.313 1.364 1.414 1.465 1.515 1.566 1.616 1.667 1.717 1.768 1.818 1.869 1.919 1.970 2.020 2.071 2.020 2.121 2.222 2.323 2.424 2.525 2.626 2.727 2.828 2.929 3.030 3.131 3.232 3.333 3.434 3.535 Units
DS9223-07 2001
www.richtek-ic.com.tw
RT9223
Typical Application Circuit
0.1µF 1000µFx3 1000µFx6 0.1µF VOUT
1N5817
VID0 VID1 VID2 VID3 VID4
VID0 VID1 VID2 0.1µF
VSEN PGOOD VID4 VID3 BSTH SHDN PGNDH PGNDL BSTL RT9223
0.1µF
2.32k 1.00k
SHDN PGOOD
www.richtek-ic.com.tw
DS9223-07 2001
RT9223
Package Information
Symbol
Dimensions Millimeters 12.598 7.391 2.362 0.330 1.194 0.229 0.102 10.008 0.381 13.005 7.595 2.642 0.508 1.346 0.330 0.305 10.643 1.270
Dimensions Inches 0.496 0.291 0.093 0.013 0.047 0.009 0.004 0.394 0.015 0.512 0.299 0.104 0.020 0.053 0.013 0.012 0.419 0.050
DS9223-07 2001
www.richtek-ic.com.tw
RT9223
RICHTEK TECHNOLOGY CORP.
Headquarter
Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
8F-1, 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek-ic.com.tw
www.richtek-ic.com.tw
DS9223-07 2001
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