RT9221

RT9221 ETC | Alldatasheet

Document overview

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Technical content

Features

z Provides 3 Regulated Voltages z N-MOSFET Driver for High Efficiency Switching Section z Power-good, Over-voltage, and Current- limiting Protection for Switching Section z 1.5V and 2.5V Fixed Output Voltage for Linear Section z Linear Section Uses Low Cost NPN Transistor as Power Device z TTL-compatible 5-bit DAC Core Output Voltage

Applications

z Power Supply for Pentium, Pentium Pro TM, Pentium II TM, Power PC TM, K6 TM, 6 ×86TM, and AlphaTM Microprocessors z High-power 5V to 3.xV DC-DC Regulators z Low-voltage Distributed Power Supplies z Programmable Power Supplies Pin Configurations Part Number Pin Configurations RT9221CS (Plastic SOP-24) TOP VIEWOperating temperature range C: Commercial standard Package type S : SOP-24 GATE1 LDOS1 LDOS2 VCC OVP PGOOD CSN CSP PGNDH GATE2 LDOV VID0 VID1 VID2 VID3 VID4 VSEN SHDN BSTH GND PGNDL DH BSTL DL 12 13

www.richtek-ic.com.tw DS9222-05 May 2001 Absolute Maximum Ratings z VCC to GND -0.3 to +5.5V z PGND to GND ± 0.3V z BSTH and BSTL to GND -0.3 to +14V z Ambient Temperature Range 0 to +70 °C z Junction Temperature Range 0 to +125 °C z Storage Temperature Range -65 to +150 °C z Lead Temperature (Soldering, 10 sec.) 300 °C z Package Thermal Resistance SOP-24, θJA 75°C/W

Electrical Characteristics

(VCC = 5V; GND = 0V; PGNDH = PGNDL = 0V; VSEN = VOUT; 0mV < (VCSP-VCSN) < 60mV; TA = 25°C) Parameter Symbol Test Conditions Min Typ Max Units Switching Section Output Voltage VOUT IO = 2A -- (1) -- -- Supply Voltage VCC VCC 4.5 -- 5.5 V Supply Current ICC -- 3 6 mA Load Regulation ∆VLOAD IO = 0.8A to 15A -- 1 -- % Line Regulation ∆VLINE VCC = 4.75V to 5.25V -- 0.5 -- % Power On Reset Trip Point VCC Rising -- 4.2 -- V Current Limit Voltage VLIMIT VCSP - VCSN 65 75 85 mV Oscillator Frequency 170 200 230 KHz Oscillator Max Duty Cycle DMAX 90 95 -- % DH Source VBSTH - VDH = 1V -- 3.5 -- Ω DH Sink VDH - VPGNDH = 1V -- 3.5 -- Ω DL Source VBSTH - VDL = 3V -- 2 -- Ω DL Sink VDL - VPGNDL = 1V -- 2 -- Ω OVP Threshold Voltage 114 120 122 % OVP Source Current IOVP VOVP = 3.0V 10 -- -- mA Power Good Threshold Voltage VSEN Rising 87 -- 113 % Linear Sections Quiescent Current IQ L D O V = 1 2 V - -- -5 mA Output Voltage (LDO1 RT9221) 2.450 2.500 2.550 V Output Voltage (LDO2 RT9221) 1.470 1.500 1.530 V Gain (AOL) LDOS (1,2) to GATE (1,2) -- 65 -- dB Load Regulation ∆VLOAD IO = 0 to 5A -- 1 -- % Line Regulation ∆VLINE LDOV = 11.4V to 12.6V -- 1 -- % Note: (1) See output voltage table.

DS9222-05 May 2001 www.richtek-ic.com.tw Function Block Diagram OSCILLATOR OPEN DRAIN ERROR AMP VCC VCC CSNCSP BSTH PGNDH PGNDL DH DL BSTL 1.25V REF GND DRIVER LEVEL SHIFT AND DRIVER SHOOT- THROUGH CONTROL S Q R 70mV CURRENT LIMIT PGOOD VID4 VID3 VID2 VID1 VID0 VSEN OVP SHDN 200KHz DAC LINEAR CONTROLLER 1.5V LINEAR CONTROLLER 2.5V 1.265V REF GND LDOS1 GATE1 LDOS2GATE2LDOV +_ +_ +_

www.richtek-ic.com.tw DS9222-05 May 2001 Pin Description Pin No. Pin Name Pin Function

1 GND Small signal analog and digital ground

2 GATE1 LDO1 gate drive output

3 LDOS1 LDO1 sense input

4 LDOS2 LDO2 sense input

5 VCC Input voltage

6O V P High signal out if V0 > setting point + 20%

7 PGOOD (1) Open collector logic output; High if V0 within 10% of the setting point

8 CSN Current sense input (Negative)

9 CSP Current sense input (Positive)

10 PGNDH High side drive GND

11 DH High side drive output

12 PGNDL Low side drive GND

13 DL Low side drive output

14 BSTL Supply for low side driver

15 BSTH Supply for high side driver

16 SHDN (1) Logic low shutdown the converter

17 VSEN Top end of internal feedback chain

18 VID4 (1) Programming input (MSB)

19 VID3 (1) Programming input

20 VID2 (1) Programming input

21 VID1 (1) Programming input

22 VID0 (1) Programming input (LSB)

23 LDOV +12V for LDO section

24 GATE2 LDO2 gate drive output

Note: (1) All logic level inputs and outputs are TTL compatible.

DS9222-05 May 2001 www.richtek-ic.com.tw Table 1 Output Voltage Program Test Conditions VID

43210 Min Typ Max Units

01111 1.287 1.300 1.313 01110 1.336 1.350 1.364 01101 1.386 1.400 1.414 01100 1.435 1.450 1.465 01011 1.485 1.500 1.515 01010 1.534 1.550 1.566 01001 1.584 1.600 1.616 01000 1.633 1.650 1.667 00111 1.683 1.700 1.717 00110 1.732 1.750 1.768 00101 1.782 1.800 1.818 00100 1.831 1.850 1.869 00011 1.881 1.900 1.919 00010 1.930 1.950 1.970 00001 1.980 2.000 2.020 00000 2.029 2.050 2.071 11111 1.980 2.000 2.020 11110 2.079 2.100 2.121 11101 2.178 2.200 2.222 11100 2.277 2.300 2.323 11011 2.376 2.400 2.424 11010 2.475 2.500 2.525 11001 2.574 2.600 2.626 11000 2.673 2.700 2.727 10111 2.772 2.800 2.828 10110 2.871 2.900 2.929 10101 2.970 3.000 3.030 10100 3.069 3.100 3.131 10011 3.168 3.200 3.232 10010 3.267 3.300 3.333 10001 3.366 3.400 3.434 Output Voltage I O = 2A in application circuit 10000 3.465 3.500 3.535 V

www.richtek-ic.com.tw DS9222-05 May 2001 Typical Application Circuit CSN CSP BSTH DH PGNDH VID4 VSEN PGOOD LDOS1 LDOV BSTL DL VCC SHDN VID3 VID2 VID1 VID0 OVP GATE1 GATE2 LDOS2 GND PGNDL 1312 0.1µF 1500µFx 2 0.1µF GND 12V RFD3055 1000µF 10K 10K VCC_CORE VLIN1 VLIN2 SHDN OVP VID0 VID1 VID2 VID3 VID4 RT9221 C5 C6 0.1µF 1500µFx 4PHB95N03LT PHB83N03LT 4µH 1.0K 2.32K0.1µF 5mΩ C9 C10 RFD3055 1000µF 1000µF1000µF PGOOD 0.1µF 5Ω5Ω 0.1µF C11 C12 R8R9 C13 1µF C14 1µF R13 10R14

DS9222-05 May 2001 www.richtek-ic.com.tw

Package Information

Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 15.189 15.596 0.598 0.614 B 7.391 7.595 0.291 0.299 C 2.362 2.642 0.093 0.104 D 0.330 0.508 0.013 0.020 F 1.194 1.346 0.047 0.053 H 0.229 0.330 0.009 0.013 I 0.102 0.305 0.004 0.012 J 10.008 10.643 0.394 0.419 M 0.381 1.270 0.015 0.050 M H B J B A C IFD

www.richtek-ic.com.tw DS9222-05 May 2001 RICHTEK TECHNOLOGY CORP. Headquarter 6F, No. 35, Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 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