APW7026 Advanced PWM and Dual Linear Power Control Features General Description • The APW7026 Provides the power control and protection for three output voltages in VGA Card applications. It integrates two PWM controllers, one linear controller as well as the monitoring and protection functions into a single package. One PWM controller (PWM1) regulates the termination voltage VTT(1.25V) with a synchronous-rectified buck converter. The second PWM controller (PWM2) supplies the Core power NVVDD ( 2.05V ) with a standard buck converter . The linear controller regulates 2.5V power for FBVDDQ. 3 Regulated Voltage are provided • SYNC Switching Power for VTT(1.25V) • ASYNC Switching Power for NVVDD(2.05V) • Linear Regulator for FBVDDQ(2.5V) • Simple Single-Loop Control Design • Voltage-Mode PWM Control • Excellent Output Voltage Regulation • VTT Output: :: ±1% Over Temperature The APW7026 can monitor all the output voltages (VTT ,NVVDD,FBVDDQ) and a single power good signal is issued when the VTT is within ± 10% of the reference voltage (VREF1) and the other levels are above its lower power good threshold voltage. Additional built-in overvoltage protection (OVP) will be started when the VTT output is above 118% of the VREF1.The OVP function will shutdown the upper MOSFET and turn on the lower MOSFET until the over-voltage is disappeared. The PWM controllers over-current function monitors the output current by sensing the voltage drop across the upper MOSFET rDS(ON), eliminating the need for a current sensing resistor. • NVVDD Output: :: ±2% Over Temperature • FBVDDQ Output:±2.5% Over Temperature • Fast Transient Response • On-Chip Feedback Compensation • Full 0% to 100% Duty Ratio • Power-Good Output Voltage Monitor • Over-Voltage and Over-Current Fault Monitors • Small Converter Size • Constant Frequency Operation(200kHz) • Programmable Oscillator from 50kHz to 800KHz Pin Description • Reduce External Component Count UGATE 1 Applications • VGA Card Power Regulation 1 20 PHASE1 VCC 2 19 LGATE 1 UGATE 2 3 18 PG ND PHASE2 4 17 OCSET1 PG OOD 5 16 VSE N1 OCSET2 6 15 FB1 FB2 7 14 FB3 V5 8 13 GATE SS 9 12 GND FAULT/RT 10 11 V3.3 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright ANPEC Electronics Corp. Rev.a.2 - Sep., 2001 1 www.anpec.com.tw APW7026 Ordering information V o lta g e C o d e 1 2 : 1 .2 5 V P ackage C ode K : SO P - 20 Tem p. R ange C : 0 to 7 0 ° C H a n d lin g C o d e TU : Tube TR : Tape & Reel L e a d F re e C o d e L : L e a d F re e D e v ic e B la n k : O rig in a l D e v ic e APW 7026 L e a d F re e C o d e H a n d lin g C o d e Tem p. R ange P ackage C ode V o lta g e C o d e Block Diagram VSEN1 FB3 LU V O CSET1 VCC V5 P O W E R -O N RESET 110% G ATE PGOOD V REF 3 1 .2 6 V 0 .3 V 90% O CSET2 200uA 118% VCC 200uA THERMAL P R O T E C T IO N UG ATE2 D R IV E 2 OC2 VCC PHASE2 GATE CONTROL IN H IB IT FAULT PW M2 S O F T -S T A R T AN D FA U LT L O G IC D R IV E 1 0V UG ATE1 OC1 PHASE1 IN H IB IT FB2 V REF 2 2 .0 V GATE CONTROL ERROR AM P2 PW M1 ERROR AM P1 VCC LG ATE1 5V LO W ER D R IV E V 3 .3 23K PGND V REF 1 O S C IL L A T O R 2 .5 V GND 4 .1 V 4 .6 V F A U L T /R T SS FB1 Absolute Maximum Ratings Symbol VCC V I , VO Parameter Supply Voltage Input , Output or I/O Voltage Unit 15 V GND -0.3 V to VCC +0.3 V Range 0 to 70 o C Junction Temperature Range 0 to 125 o C Storage Temperature Range -65 to +150 o C 300 ,10 seconds o C TA Operating Ambient Temperature TJ TS TG TS Rating Soldering Temperature Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 2 www.anpec.com.tw APW7026 Thermal Characteristics Symbol R JA Parameter Value Unit 75 65 Thermal Resistance in Free Air SOIC SOIC (with 3in 2 of Copper) o C Electrical Characteristics 1. Recommended operating conditions, Unless otherwise noted. 2. Refer to Block and Simplified Power System Diagrams , and Typical Application Schematic. APW7026 Symbol Parameter Unit Test Conditions Min Typ Max SUPPLY CURRENT ICC Nominal Supply Current UGATE1, LGATE1, UGATE2, and GATE Open 6 mA POWER-ON RESET Rising VCC Threshold 9.5 Falling VCC Threshold 8.2 Rising V5 Threshold 9.0 4.4 Falling V5 Threshold 10.4 3.7 4.0 185 200 V V 4.7 V V OSCILLATOR FOSC ∆VOSC Free Running Frequency RT = Open Ramp Amplitude RT = Open 215 kHz 1.9 V 1.25 V PWM CONTROLLER REFERENCE VOLTAGE VREF1 SYNC PWM Controller Reference Voltage VREF1 Accuracy VREF2 -1 ASYNC PWM Controller Reference Voltage +1 2.0 VREF2 Accuracy -2 % V +2 % +2.5 % LINEAR CONTROLLER VREF3 Reference Voltage GATE=FB3 1.26 VREF3 Accuracy GATE Drive Current -2.5 VGATE=4V 20 V 50 mA 1.0 A PWM CONTROLLERS GATE DRIVERS IUGATE UGATE1,2 Source RUGATE UGATE1,2 Sink VCC = 12V, VUGATE1 (or VUGATE2 ) = 1V 2.2 ILGATE LGATE1 Source VCC = 12V, VLGATE1 = 1V 1.0 RLGATE LGATE1 Sink VCC = 12V, VLGATE1 = 1V 1.6 Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 VCC = 12V, VUGATE1 (or VUGATE2 ) = 6V 3 3.5 Ω A 3.0 Ω www.anpec.com.tw APW7026 Electrical Characteristics Cont. 1. Recommended operating conditions, Unless otherwise noted. 2. Refer to Block and Simplified Power System Diagrams , and Typical Application Schematic. APW 7026 Sym bol P a ra m e te r U n it T e s t C o n d itio n s M in Ty p M ax P R O T E C T IO N V S E N 1 O . V . t r ip p o in t ( V S E N 1 / V R E F 1 ) V S E N 1 R is i n g V S E N 1 O . V . H y s t e r e s is V 3 . 3 O . V . t r i p p o in t V 3 . 3 R is i n g V 3 . 3 O . V . H y s t e r e s is lO V P R SS POW ER F A U L T S o u r in g C u r r e n t V F A U LT /R T = 2 . 0 V O C S E T 1 ,2 C u rre n t S o u rc e V o c s e t = 4 .5 V 170 11 8 % 2 % 4 .1 V 0 .1 V 25 mA 200 230 uA 23 KΩ V S E N 1 R is i n g 11 0 % V S E N 1 L o w e r T h r e s h o ld V S E N 1 R is i n g 94 % V S E N 1 P G D H y s t e r e s is U p p e r / L o w e r T h r e s h o ld 2 % V 3 . 3 L o w e r T h r e s h o ld V 3 . 3 R is i n g 2 .5 V P u l l u p r e s is t o r t o 5 V GOOD V S E N 1 U p p e r T h r e s h o ld (V S E N 1 /V R EF1) V 3 . 3 P G D H y s t e r e s is F B 3 L o w e r T h r e s h o ld V F B 3 R is i n g F B 3 P G D H y s t e r e s is V PGOOD P G O O D V o lt a g e L o w 0 .1 V 1 .0 V 0 .1 lP G O O D = - 4 m A V 0 .8 V Functional Pin Description UGATE1 (Pin 1) Connect UGATE1 pin to the SYNC PWM Converter’s of the reference voltage (VREF1) or when V3.3 or VFB3 is below its lower power good threshold. upper MOSFET gate .This pin provides the gate drive for the upper MOSFET. OCSET2 (Pin 6) Connect a resistor (ROCSET ) from this pin to the drain of VCC (Pin 2) Provide a + 12V bias supply for the IC to this pin . This the ASYNC PWM converter’s MOSFET . ROCSET, an pin also provides the gate bias charge for all the MOSFETs controlled by the IC. The voltage at this pin is MOSFET’s on-resistance (rDS(ON)) set the converter’s internal 200µA current source (IOCSET ) , and the over-current (OC) trip point according to the following equation: monitored for Power-On Reset (POR) purpose. UGATE2 (Pin 3) Connect UGATE2 pin to the ASYNC PWM converter’s MOSFET gate . This pin provides the gate drive for the IPEAK = MOSFET. PHASE2 (Pin 4) IO CSET x ROCSET rDS(ON) An over-current trip cycles the soft-start function. FB2 (Pin 7) Connect this pin to the output of the ASYNC PWM Connect the PHASE2 pin to the ASYNC PWM converter’s MOSFET source. This pin is used to monitor converter . The voltage at this pin is regulated to the reference voltage VREF2 . A resistor driver is connected the voltage drop across the MOSFET for over-current protection. from this pin to VOUT2(ROUT2) and to GND(RGND2) that sets the output voltage as the following equation : PGOOD (Pin 5) PGOOD is an open drain output used to indicate the status of the output voltages. This pin is pulled low when the SYNC PWM regulator output is not within ± 10% Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 4 www.anpec.com.tw APW7026 Functional Pin Description Cont. R OUT2 ) x VREF2 VOUT2 = ( 1+ R GND2 pass MOSFET. FB3 (Pin 14) Connect this pin to the output of the linear regulator . A The value of the resistor connected from VOUT2 to FB2 must be less than 150Ω . resistor driver is connected from this pin to VOUT3 and GND that sets the output voltage as same as VOUT2. This V5 (Pin 8) The +5V input voltage at this pin is monitored for power-on pin is monitored for power good function. FB1 (Pin 15) reset (POR) purpose. SS (Pin 9) This pin provides the feedback for the SYNC PWM converter. Typically this pin can be connected directly to This pin provides the soft-start for the all PWM converters and linear regulator . An internal resistor charges an the output of the converter . However , a resistor divider is recommended to be connected from this pin to external capacitor that is connected from 5V supply to this pin which ramps up the all outputs , preventing the VOUT1 and GND to adjust the output voltage as same as VOUT2. The value of the resistor connected from VOUT1 to outputs from overshooting as well as limiting the input current . The second function of the soft-start cap is to FB1 must be less than 200Ω. VSEN1 (Pin 16) provides long off time for the synchronous MOSFET during current limiting . FAULT / RT (Pin 10) This pin provides oscillator switching This pin is connected to the SYNC PWM converter’s output voltage . The PGOOD and OVP comparator cicuits use this signal to report output voltage status and over-voltage protection. frequency adjustment . By placing a resistor ( RT ) from this pin to GND , the nominal 200kHz switching frequency is increased .Conversely, connecting a pull-up resistor ( RT ) OCSET1 (Pin 17) Connect a resistor (ROCSET ) from this pin to the drain of the SYNC PWM converter’s upper MOSFET . The from this pin to VCC reduces the switching frequency. Nominally , the voltage at this pin is 1.26V. In the event of an over-voltage or over-current internally pulled to VCC. over-current (OC) trip point for the SYNC PWM converter is set by the ROCSET as same as the OCSET2. condition , this pin is An over-current trip cycles the soft-start function. PGND (Pin 18) V3.3 (Pin 11) This pin is connected to the +3.3V or the output of the This is the power ground connection . Tie the SYNC PWM converter’s lower MOSFET source to this pin. ASYNC PWM converter for power good and over-voltage detection. When the output voltage of the LGATE1 (Pin 19) Connect LGATE1 to the SYNC PWM converter’s lower ASYNC PWM converter is not in the range from 3V to 4V, connect this pin to +3.3V voltage. MOSFET gate . This pin provides the gate drive for the lower MOSFET. GND (Pin 12) Signal ground for the IC. All voltage levels are measured PHASE1 (Pin 20) Connect the PHASE1 pin with respect to this pin. GATE (Pin 13) Connect this pin to the gate of an external MOSFET. This pin provides the drive for the linear regulator’s Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 to the SYNC PWM Converter’s upper MOSFET source. This pin is used to monitor the voltage drop across the upper MOSFET for over-current protection. 5 www.anpec.com.tw APW7026 Typical Performance Curves 10000 RT ( kΩ ) 1000 RT pull up to +12V 100 10 RT pull down to G ND 1 50 150 250 350 450 550 650 750 Reference Voltage Deviation(VREF2 ) Reference Voltage Deviation(VREF1 ) Switching Frequency ( kHz ) 1.0% 0.8% 0.6% 0.4% 0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1.0% 0 25 50 75 100 125 o Reference Voltage Deviation(VREF1 ) Junction Temperature ( C) 1.0% 0.8% 0.6% 0.4% 0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1.0% 0 25 50 75 100 125 o Junction Temperature ( C) 1.0% 0.8% 0.6% 0.4% 0.2% Note : The Referance Voltage(VREF) Deviation is 0.0% -0.2% VREF(TJ) - VREF(25oC) -0.4% -0.6% x 100% VREF(25oC) TJ is Junction Temperature. -0.8% -1.0% rt 0 25 50 75 100 125 Junction Temperature (oC) Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 6 www.anpec.com.tw APW7026 Simplified Power System Diagram +3.3v +5V Q3 VOUT2 +3.3V Q1 ASYNC PWM Controller SYNC PWM Controller Q4 Linear Controller VOUT1 Q2 VOUT3 Typical Application Circuit C812 220pF RX1 10R C809 220pF L800 2uH L802 2uH R817 1.2K +12V AGP 3.3V +5V C807 330uF C801 1uF R812 1.5k C808 330uF C813 330uF R819 5.1R Q802 APM9410 R813 5.1R L801 7.8uH 1 2 NVVDD 2.05V/4A 3 C810 330uF R814 100RF C811 330uF 4 D800 FM5820 5 6 VCC UGATE2 PHASE2 PGOOD L803 Q803B 7.8uH APM7313 R820 5.1R UGATE1 PHASE1 20 LGATE1 19 PGND 18 OCSET1 17 VSEN1 16 FB1 OCSET2 C814 10uF Q803A APM7313 VTT 1.25V/3.5A C816 330uF C815 330uF R821 R824 0R NC 15 7 FB2 5V 8 C805 1uF 9 10 V5 FB3 14 SS GATE 13 FAULT/RT GND V3.3 R816 4.02KF Q800 APM3055 12 11 APW7026-12 R811 100RF Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 AGP 3.3V C802 330uF 7 R810 97.6RF FBVDDQ 2.5V/1.5A C817 330uF www.anpec.com.tw APW7026 Packaging Information SO – 300mil ( Reference JEDEC Registration MS-013) D N H GAUGE PLANE E 1 2 3 A Dim Millimeters Min. Max. 1 A1 B e L Variations- D Variations Min. Max. Dim Inches Min. Max. Variations- D Variations Min. Max. A 2.35 2.65 SO-16 10.10 10.50 A 0.093 0.1043 SO-16 0.398 0.413 A1 0.10 0.30 SO-18 11.35 11.76 A1 0.004 0.0120 SO-18 0.447 0.463 B 0.33 0.51 SO-20 12.60 13 B 0.013 0.020 SO-20 0.496 0.512 D See variations SO-24 15.20 15.60 D See variations SO-24 0.599 0.614 E 7.40 SO-28 17.70 18.11 E 0.2914 0.2992 SO-28 0.697 0.713 SO-14 8.80 9.20 e 0.050BSC SO-14 0.347 0.362 e 7.60 1.27BSC H 10 10.65 H 0.394 0.419 L 0.40 1.27 L 0.016 0.050 N See variations N See variations φ1 0° φ1 8° Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 8 0° 8° www.anpec.com.tw APW7026 Physical Specifications Terminal Material Lead Solderability Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. Reflow Condition (IR/Convection or VPR Reflow) tp TP C ritical Zone T L to T P T e m p e ra tu re R am p-up TL tL T sm ax T sm in R am p-down ts Preheat 25 t 25 °C to Peak T im e Classificatin Reflow Profiles Profile Feature Sn-Pb Eutectic Assembly Large Body Small Body Average ramp-up rate 3°C/second max. (TL to TP) Preheat - Temperature Min (Tsmin) 100°C - Temperature Mix (Tsmax) 150°C - Time (min to max)(ts) 60-120 seconds Tsmax to TL - Ramp-up Rate Tsmax to TL - Temperature(TL) 183°C - Time (tL) 60-150 seconds Peak Temperature(Tp) 225 +0/-5°C 240 +0/-5°C Time within 5°C of actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6°C/second max. 6 minutes max. Time 25°C to Peak Temperature Pb-Free Assembly Large Body Small Body 3°C/second max. 150°C 200°C 60-180 seconds 3°C/second max 217°C 60-150 seconds 245 +0/-5°C 250 +0/-5°C 10-30 seconds 20-40 seconds 6°C/second max. 8 minutes max. Note: All temperatures refer to topside of the package. Measured on the body surface. Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 9 www.anpec.com.tw APW7026 Reliability test program Test item Method Description SOLDERABILITY MIL-STD-883D-2003 245°C , 5 SEC HOLT MIL-STD-883D-1005.7 1000 Hrs Bias @ 125 °C PCT JESD-22-B, A102 168 Hrs, 100 % RH , 121°C TST MIL-STD-883D-1011.9 -65°C ~ 150°C, 200 Cycles ESD MIL-STD-883D-3015.7 VHBM > 2KV, VMM > 200V Latch-Up JESD 78 10ms , Itr > 100mA Tape & Reel Dimensions t D P Po E P1 Bo F W Ko Ao D1 T2 J C A B T1 Application A B C J T1 T2 W P E SOP- 28 330±1 62 ±1.5 12.75 ± 0. 5 2 ± 0.6 24.4 ± 0.2 2± 0.2 24 ± 0.3 12 ± 0.1 1.75± 0.1 Application F D D1 Po P1 Ao Bo Ko t 1.5+ 0.25 4.0 ± 0.1 SOP- 28 11.5 ± 0.1 1.5 +0.1 2.0 ± 0.1 10.85 ± 0.1 18.34± 0.1 2.97± 0.1 0.35±0.01 (mm) Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 10 www.anpec.com.tw APW7026 Cover Tape Dimensions Application SOP- 28 Carrier Width 24 Cover Tape Width 21.3 Devices Per Reel 1000 Customer Service Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369 Copyright ANPEC Electronics Corp. Rev. A.2 - Sep., 2001 11 www.anpec.com.tw