APW7036 Advanced Dual PWM Power Controller Features General Description • The APW7036 provides complete power control and protection for two DC-DC converter optimized in VGA Card applications. It integrates two PWM controllers , as well as the monitoring and protection function into a single package. The APW7036 provides simple , single feedback loop , voltage mode control with fast transient response. The output voltage of the SYNC converter can be precisely regulated to as low as VREF (1.25V , 1.5V , 1. 8V and 2.05V) , with a maximum tolerence of ±1.0% over temperature. The APW7036 can provides in excess of 14A of output current for an on-board DC/DC converter. It can monitors all the output voltage , and a single Power Good signal is issued when the SYNC output is within ±10% of the VREF setting and the ASYNC output levels is above under-voltage levels. Additional built-in over-voltage protection for the SYNC output uses the lower MOSFET to prevent output voltage above 115% of the VREF setting. The PWM controller’s over-current function monitor the output current by sensing the voltage drop across the upper MOSFET’s RDS(ON) , eliminating the need for a current sensing resistor . 2 Regulated Voltage are provided − SYNC Switching Power Internal Reference Voltage (1.25V , 1.5V , 1.8V and 2.05V) − ASYNC Switching Power Internal Reference Voltage (1.5V) • Simple Single-Loop Control Design − Voltage-Mode PWM Control • Excellent Output Voltage Regulation − SYNC Output : ±1% Over Temperature − ASYNC Output : ±3% Over Temperature • Fast Transient Response − High-Bandwidth Error Amplifier − 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 − Reduce External Component Count • Pin Description UGATE 20Pin , SOIC Package Applications • • High Power 5V to 2.5 or 3.3V DC-DC Regulator VGA Card Power Regulation 1 20 PHASE1 VCC 2 19 LGATE GATE 3 18 PGND PHASE2 4 17 OCSET1 PGOOD 5 16 VSEN OCSET2 6 15 FB1 FB2 7 14 COMP SS 8 13 NC FAULT/RT 9 12 GND 10 11 VAUX NC 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.1 - May, 2001 1 www.anpec.com.tw APW7036 Ordering Information Voltage Code 12 : 1.25V 15 : 1.50V 18 : 1.80V 20 : 2.05V Package Code K : SO P-20 Tem p. Range C : 0 to 70 ° C Handling Code TU : Tube TR : Tape & Reel Lead Free Code L : Lead Free Device Blank : O riginal Device APW 7036 Lead Free Code Handling Code Tem p. Range Package Code Voltage Code Block Diagram VSEN OCSET1 VCC 110% PGOOD OCSET2 200uA VCC GATE 90% DRIVE2 POR OC2 VAUX 115% PHASE2 200uA VCC INHIBIT GATE CONTROL FAULT PWM2 DRIVE1 0V SOFT-START AND FAULT LOGIC UGATE OC1 PHASE1 INHIBIT FB2 GATE CONTROL ERROR AMP2 1.5V ERROR AMP1 PWM1 VCC LGATE VCC LOWER DRIVE 28uA PGND V REF OSCILLATOR 1.05V GND 4.5V FAULT SS FB1 COMP Absolute Maximum Ratings Symbol VCC VI , VO Parameter Supply Voltage Input , Output or I/O Voltage Rating 15 Unit V GND -0.3 V to V12 +0.3 V 0 to 70 °C TA Operating Ambient Temperature Range TJ Junction Temperature Range 0 to 125 °C TSTG Storage Temperature Range -65 to +150 °C 300 ,10 seconds °C TS Soldering Temperature Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 2 www.anpec.com.tw APW7036 Thermal Characteristics Symbol R θJA Parameter Thermal Resistance in Free Air SOIC SOIC (with 3in2 of Copper) Value Unit 75 65 °C/W Electrical Characteristics (Recommended operating conditions , Unless otherwise noted) Refer to Block and Simplified Power System Diagrams , and Typical Application Schematic APW7036 Unit Symbol Parameter Test Conditions Min. Typ. Max. VCC Supply Current ICC Nominal Supply Current UGATE , LGATE , GATE , open 9 mA Power-on Reset Rising VCC Threshold Falling VCC Threshold Rising VAUX Threshold VAUX Threshold Hysteresis Rising VOCSET Threshold Oscillator FOCS Free Running Frequency Ramp Amplitude Vocset=4.5V Vocset=4.5V Vocset=4.5V Vocset=4.5V RT= Open RT= Open ∆VOSC Switching Controller Reference Voltage VREF Reference Voltage APW7036-12 APW7036-15 APW7036-18 APW7036-20 Reference Voltage accuracy VFB2 Reference Voltage Reference Voltage accuracy Synchronous PWM Controller Error Amplifier DC Gain GBWP Gain-Bandwidth Product SR Slew Rate COMP=10pF PWM Controllers Gate Drivers IUGATE UGATE1,GATE Source RUGATE UGATE1,GATE Sink Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 VCC=12V, VUGATE 1,GATE=6V VUGATE1,GATE =1V 3 10.4 V V V V V 215 kHz VP-P 8.2 2.5 0.5 1.26 185 200 1.9 1.25 1.50 1.80 2.05 -1.0 V +1.0 1.5 -3.0 +3.0 88 15 6 % V % dB MHz V/µs 1 A 3.5 Ω www.anpec.com.tw APW7036 Electrical Characteristics Cont. Symbol Parameter PWM Controllers Gate Drivers ILGATE LGATE Source RLGATE LGATE Sink Protection VSEN Over-Voltage (VSEN/VREF) IOVP FAULT Souring Current IOCSET OCSET1,2 Current Source ISS Soft Start Current Power Good VSEN Upper Threshold (VSEN/VREF) VSEN Under Voltage (VSEN/VREF) VSEN Hysteresis (VSEN/VREF) VPGOOD PGOOD Voltage Low Test Conditions APW7036 Min. Typ. Max. VCC=12V, VLGATE=1V VLGATE= 1V VSEN Rising VFAULT/RT=2.0V VOCSET= 4.5VDC 1 170 115 8.5 200 28 Unit A 3 Ω 120 % mA 230 µA µA VSEN1 Rising 110 % VSEN1 Rising 94 % Upper /Lower Threshold 2 % IPGOOD= -4mA 0.8 V Functional Pin Description converter’s MOSFET source. This pin is used to monitor the voltage drop across the MOSFET for over-current protection. UGATE (Pin 1) Connect UGATE pin to the synchronous PWM converter’s upper MOSFET gate. This pin provides the gate drive for the upper MOSFET. PGOOD (Pin 5) VCC (Pin 2) PGOOD is an open collector output used to indicate the status of the output voltages. This pin is pulled low when the synchronous regulator output is not within 10% of the reference voltage or the other output is below under-voltage thresholds. Provide a 12V bias supply for the IC to this pin. This pin also provides the gate bias charge for all the MOSFETs controlled by the IC. The voltage at this pin is monitored for Power-On Reset purposes. NC (Pin 10, 13) GATE (Pin 3) No Connection. Connect GATE pin to the standard BUCK PWM converter’s MOSFET gate. This pin provides the gate drive for the MOSFET. OCSET1 , 2 (Pin 17 , 6) Connect a resistor (ROCSET ) from this pin to the drain of the PWM converter’s MOSFET. ROCSET , an internal 200µA current source (IOCSET ) , and the MOSFET’s on-resistance(rDS(ON)) set the converter over-current PHASE2 (Pin 4) Connect the PHASE2 pin to the standard BUCK PWM Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 4 www.anpec.com.tw APW7036 Functional Pin Description Cont. (OC) trip point according to the following equation: synchronous PWM regulator error amplifier. The FB1 pin is the inverting input of the error amplifier. Similarly , the COMP pin is the error amplifier output. These pins are used to compensate the voltage-mode control feedback loop of the synchronous PWM converter. IOCSET * ROCSET I = PEAK rDS(ON) An over-current trip cycles the soft-start function. VSEN (Pin 16) FB2 (Pin 7) This pin is connected to the synchronous PWM converters’s output voltage. The PGOOD and OVP comparator circuits use this signal to report output voltage status and for over-voltage protection. This pin provides the feedback for the non-synchronous switching regulator. A resistor driver is connected from this pin to regulator output and GND that sets the output voltage. The value of the resistor connected from regulator output to FB2 must be less than 150Ω . PGND (Pin 18) This is the power ground connection. Tie the synchronous PWM converter’s lower MOSFET source to this pin. SS (Pin 8) Connect a capacitor from this pin to ground. This capacitor , along with an internal 28µA current source , sets the soft-start interval of the converter. LGATE (Pin19) Connect LGATE to the synchronous PWM converter’s lower MOSFET gate. This pin provides the gate drive for the lower MOSFET. FAULT / RT (Pin 9) This pin provides oscillator switching 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 ) 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 condition , this pin is internally pulled to VCC. PHASE1 (Pin 20) Connect the PHASE1 pin to the synchronous PWM converter’s upper MOSFET source. This pin is used to monitor the voltage drop across the upper MOSFET for over-current protection. VAUX (Pin 11) The +3.3V input voltage at this pin is monitored for power-on reset (POR) purposes. GND (Pin 12) Signal ground for the IC. All voltage levels are measured with respect to this pin. COMP and FB1 (Pins 14 , and 15) COMP and FB1 are the available external pins of the Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 5 www.anpec.com.tw APW7036 Simplified Power System Diagram + 5 V IN Q1 Q3 V OUT2 Standard Buck PWM Controller Synchronous PWM Controller V OUT1 Q2 APW7036 Typical Characteristics R1 10R C2 220pF L1 1uH +12V +5V C1 1uF R3 5.1R C8 220pF +5V R12 1.2K C10 330uF Q2 APM9410 VOUT2 (3.3V) R13 5.1R L3 7.8uH R9 120RF C11 330uF D1 FM5800 C9 0.1uF 1 UGATE 2 VCC PHASE1 20 LGATE 19 3 GATE PGND 18 4 PHASE2 OCSET1 17 5 PGOOD VSEN 16 6 OCSET2 7 FB2 8 SS 9 FAULT 10 NC FB1 15 COMP 14 NC 13 GND 12 VAUX 11 VOUT1 (2.5V) L2 7.8uH R4 5.1R Q1B APM7313 C6 10pF C2 2700pF +5V Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 C3 330uF Q1A APM7313 C4 330uF R5 67RF C5 330uF R7 3K APW7036-15 R11 750 R10 100RF R2 1.2K LP1 LED R8 150K R6 100RF +3.3V 6 www.anpec.com.tw APW7036 Typical Characteristics 10000 RT ( kΩ ) 1000 to +12V RT pull up 100 RT pull down to GND 10 1 50 150 250 350 450 550 650 750 Switching Frequency ( kHz ) 1.0% 0.8% 0.8% VFB2 Reference Voltage deviation (%) 1.0% 0.6% VREF Voltage deviation (%) 0.4% 0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1.0% 0 10 20 30 40 50 60 70 80 90 100 0.6% 0.4% 0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1.0% 0 Junction Temperature (oC) Note : The Referance Voltage(VREF ) Deviation is Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 10 20 30 40 50 60 70 80 90 100 Junction Temperature (oC) VREF(TJ ) - VREF(25 oC) x 100% VREF (25oC) 7 www.anpec.com.tw APW7036 Package Information SO – 300mil ( Reference JEDEC Registration MS-013) D h*45 C H GAUGE PLANE E 1 2 3 A Dim Millimeters L A1 B e Variations Dim Inches 1 Variations Min. Max. Variations Min. Max. Min. Max. Variations Min. Max. 2.65 SO-20 12.60 13.0 A 0.093 0.1043 SO-20 0.496 0.512 A1 2.35 0.10 0.30 SO-24 15.20 15.60 A1 0.004 0.0120 SO-24 0.599 0.614 B 0.33 0.51 SO-28 17.70 18.11 B 0.013 0.020 SO-28 0.697 0.713 0.23 0.32 A C D E e H C 0.0091 0.0125 See variations 7.40 7.60 D See variations E 0.2914 0.2992 1.27BSC 10 10.65 e 0.050BSC H 0.394 0.419 h 0.010 0.029 1.27 L 0.016 0.050 8° φ1 0° 8° h 0.25 0.75 L 0.40 φ1 0° Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 8 www.anpec.com.tw APW7036 Physical Specifications Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb) Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. 1000 devices per reel Reflow Condition (IR/Convection or VPR Reflow) tp TP C ritical Z one 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.1 - May, 2001 9 www.anpec.com.tw APW7036 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 SOP-20 330±1 62 ± 1.5 Application F D C 12.75 ±0.15 D1 SOP-20 11.5 ± 0.1 1.5+0.1 1.5+0.25 Application A B J T1 T2 W 2 + 0.6 24.4 +0.2 2± 0.2 Po P1 Ao 24 + 0.3 - 0.1 Bo 4.0 ± 0.1 2.0 ± 0.1 8.2 ± 0.1 13± 0.1 P E 12± 0.1 1.75± 0.1 Ko t 2.5± 0.1 0.35±0.013 (mm) Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 10 www.anpec.com.tw APW7036 Cover Tape Dimensions Application SOP- 20 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.1 - May, 2001 11 www.anpec.com.tw