APW7058 Synchronous Buck PWM and Linear Controllers Features • General Description Provides Two Regulated Voltages The APW7058 integrates one synchronous-rectified Buck PWM controller and one linear controller to provide two regulated voltages for graphics cards and other embedded processor applications. The PWM controller which drives dual N-channel MOSFETs uses fixed 600kHz frequency, voltage-mode PWM control and integrates power-on-reset(POR), built-in soft-start, output under-voltage monitoring and shutdown functions into a single chip. The linear controller which drives a N-channel MOSFET bypass transistor allows users to optimize the transient response by external components. The POR circuit with hysteresis monitors both 5VCC and 12VCC supply voltages to start up/shutdown the IC at power-on/off. An internal 0.8V temperature-compensated reference is designed to meet the low output voltage requirement for further applications. The built-in soft-start function sets the soft-start interval to prevent the output voltages from overshoot as well as limiting the input currents. The under-voltage protections monitor the voltages at FB and FB2 for short-circuit protection. The under-voltage protections cycle the soft-start function until 3 times of UVP events are happened. Pulling and holding the FB2 pin above 1.28V to disable the both controllers. - One Synchronous-Rectified Buck PWM Controller - One Linear Controller • Low Reference Voltage for Further Applications - Both Controllers : 0.8V ± 2% Over Temperature • Both Controllers Drive N-Channel MOSFETs - PWM Controller Drives Dual N-Channel MOSFETs - Linear Controller Drives N-Channel MOSFET • Built-in PWM Feedback Compensation - No Steady-State Error - Voltage-Mode PWM Control - Full 0~100% Duty Ratio - Fast Transient Response • Adjustable Outputs by External Resistor Dividers • Under-Voltage Monitoring on Both Controllers • Small Converter Size - 600kHz Constant Switching Frequency - Built-In Soft-Start - Simple SO-8 Package • • Pin Description Shutdown Control Lead Free Available (RoHS Compliant) Applications • • • 12VCC 1 8 FB UGATE 2 7 FB2 GND 3 6 DRIVE2 LGATE 4 5 5VCC Motherboard Graphics Cards 12V, 5V and 3.3V Inputs DC-DC Converter 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.3 - Mar., 2005 1 www.anpec.com.tw APW7058 Ordering and Marking Information P a c k a g e C od e K : SOP - 8 O p e ra tin g J u n c tio n T e m p . R an g e C : 0 to 70 °C H a n d lin g C od e TU : Tube T R : T a p e & R e el L e ad F re e C od e L : L ea d F ree D e v ic e B la nk : O rig in a l D e vic e APW 7058 L e ad F re e C od e H a n d lin g C od e T e m p . R a n ge P a c k a g e C od e APW 7058 XXXXX APW 7058 K : X X X X X - D a te C o de Notes： ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classification at lead-free peak reflow temperature. Block Diagram 12VCC 5VCC UGATE Power On Reset PW M PO R 0.5V Gate Control Soft-Start and Fault Logic UVP1 5VC C LGATE Inhibit / Soft-Start FB2 UVP2 COMP FB 0.5V 12VC C Error Am plifier VREF 0.8V Shutdow n Oscillator Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 F O SC 600kH z 2 1.28V Linear C ontroller DRIVE2 GND www.anpec.com.tw APW7058 Typical Application R4 +12V +5V C8 1uF 5 1 VIN2 +3.3V C10 470uF Q3 R9 0 UGATE 6 4 L1 1uH R6 0 VOUT1 +1.263V C5, C6 /10A D1 2 x 470uF Q2 U1 APW7058 FB 7 R7 2.37k Q1 R5 0 LGATE C9 33pF C11 470uF 2 C2, C3 2 x 470uF DRIVE2 R10 27k VOUT2 +2.5V/3A VIN1 +3.3V C4 4.7uF 5VCC 12VCC L2 1uH C1 2.2 1uF R1 590 8 FB2 R8 1.13k GND 3 R2 1.02k C7 68nF R3 0 Q1, Q2 : APM2014N UC D1 : 3A Schcottky Diode Q3 : APM2055N UC C2, C3, C5, C6, C10, C11 : 470µF/6.3V, ESR=30mΩ Absolute Maximum Ratings Symbol Parameter Rating Unit 5V CC 5VCC Supply Voltage (5VCC to GND) -0.3 ~ 7 V 12V CC 12VCC Supply Voltage (12VCC to GND) -0.3 ~ 15 V UAGTE, DRIVE2 to GND -0.3 ~ 12V CC V LGATE, FB, FB2 to GND -0.3 ~ 5V CC Maximum Junction Temperature T STG Storage Temperature V 150 o C -65 ~ 150 o C o C T SDR Maximum Soldering Temperature, 10 Seconds 300 V ESD Minimum ESD Rating (Human body model) ±2 KV Thermal Characteristics Symbol θJA Parameter Value Junction-to-Ambient Resistance in free air (SOP-8) Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 3 160 Unit o C/W www.anpec.com.tw APW7058 Recommended Operating Conditions Symbol (Note) Parameter Range Unit 5 ± 5% V 5V CC 5VCC Supply Voltage 12V CC 12VCC Supply Voltage 12 ± 10% V V OUT1 Output Voltage of the Buck converter 0.8 ~ 3.3 V 3.3/5 ± 5% V 0.8 ~ 3.3 V V IN1 V OUT2 V IN2 TA TJ Input Voltage of the Buck converter Output Voltage of the Linear Regulator 3.3/5 ± 5% Input Voltage of the Linear Regulator Ambient Temperature Junction Temperature V 0 ~ 70 o C 0 ~ 125 o C Note : Refer to the typical application circuit Electrical Characteristics Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V and TA= 0~70 oC. Typical values are at TA=25oC. APW7058 Unit Symbol Parameter Test Conditions Min Typ Max SUPPLY CURRENT ICC 5VCC Supply Current LGATE Open, FB2=DRIVE2 2.5 mA 12VCC Supply Current UGATE Open 2.5 mA POWER-ON RESET Rising 5VCC Threshold 12VCC=12V 4.0 4.2 4.5 V Falling 5VCC Threshold 12VCC=12V 3.5 3.7 3.9 V Rising 12VCC Threshold 5VCC =5V 9.6 10.3 10.8 V Falling 12VCC Threshold 5VCC =5V 9.3 9.7 10.2 V 550 600 650 kHz OSCILLATOR FOSC ∆VOSC Free Running Frequency Ramp Upper Threshold 2.85 V Ramp Lower Threshold 0.95 V Ramp Amplitude 1.9 VP-P 0.8 V REFERENCE VOLTAGE VREF Reference Voltage System Accuracy Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 Over Line, Load and Temperature 4 -2 +2 % www.anpec.com.tw APW7058 Electrical Characteristics (Cont.) Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V and TA= 0~70 oC. Typical values are at TA=25oC. APW7058 Symbol Parameter Test Conditions Min Typ Max Unit BUILT-IN PWM FEEDBACK COMPENSATION DC Gain 75 dB FP First Pole Frequency 10 Hz FZ First Zero Frequency 1 kHz UGATE Duty Range 0 FB Input Current 100 % 0.1 µA PWM CONTROLLER GATE DRIVERS TD UGATE Source VUAGTE=1V 0.6 A UGATE Sink VUGATE=1V 7.3 Ω LGATE Source VLGATE=1V 0.6 A LGATE Sink VLGATE=1V 1.8 Ω 50 nS 78 1.6 1 dB Dead Time LINEAR CONTROLLER DC Gain Gain Bandwidth Product CL=0.5nF CL=1nF FB Input Current MHz 0.1 µA DRIVE2 Source Current VFB2=VREF-20mV, VDRIVE2=7V 9.8 mA DRIVE2 Sink Current VFB2=VREF+20mV, VDRIVE2=3V 2.6 mA DRIVE2 Output High Voltage DRIVE2 Open 11.7 V DRIVE2 Output Low Voltage DRIVE2 Open 0.01 V FB or FB2 Falling 0.5 V 15 mV 2 mS 1.28 V 30 mV UNDER-VOLTAGE PROTECTION UVFB FB/FB2 Under-Voltage Level FB/FB2 Under-Voltage Hysteresis SOFT-START AND SHUTDOWN T SS Soft-Start Interval FB2 Shutdown Threshold FB2 Rising FB2 Shutdown Hysteresis Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 5 www.anpec.com.tw APW7058 Functional Pin Description 12VCC (Pin 1) FB2 (Pin 7) Connect this pin to 12V supply voltage. It provides bias voltage for the high-side MOSFET driver and the linear controller. The voltage at this pin is monitored for Power-On-Reset purposes. Connect this pin to the output (VOUT2) of the linear regulator via a proper sized resistor divider. The voltage at this pin is regulated to 0.8V and the VOUT2 is determined using the following formula : R7 VOUT2=0.8V x (1+ R8 ) UGATE (Pin 2) where R7 is the resistor connected from VOUT2 to FB2, and R8 is the resistor connected from FB2 to GND. This pin is also monitored for under-voltage events. Pulling and holding FB2 above 1.28V shuts down both regulators. Releasing FB2 initiates soft-start on both regulators. Connect this pin to the gate of the high-side MOSFET. This pin provides gate drive for the MOSFET. GND (Pin 3) Signal and power ground for the IC. Putting vias to ground planet directly and close to GND pins minimizes noises. FB (Pin 8) This pin is the inverting input of the internal error amplifier. Connect this pin to the output (VOUT1) of LGATE (Pin 4) Connect this pin to the gate of the low-side MOSFET. This pin provides gate drive for the MOSFET. the Buck converter via a proper sized resistor divider to provide feedback loop of the Buck converter. The VOUT1 is determined using the following formula : R1 VOUT1=0.8V x (1+ R2 ) 5VCC (Pin 5) Connect this pin to a 5V supply voltage via a RC filter (2.2Ω and 1µF are recommended). This pin provides the bias for the control circuitry and the lowside MOSFET driver. The voltage at this pin is monitored for Power-On-Reset purposes. where R1 is the resistor connected from VOUT1 to FB, and R2 is the resistor connected from FB to GND. This pin is also monitored for under-voltage events. DRIVE2 (Pin 6) Connect this pin to the gate of an external N-Channel MOSFET transistor. This pin provides the gate voltage for the linear regulator pass transistor. It also provides a means of compensating the linear controller for applications where the user needs to optimize the regulator transient response. Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 6 www.anpec.com.tw APW7058 Typical Characteristics Reference Voltage vs. Junction Temperature Switching Frequency vs. Junction Temperature 650 Switching Frequency, FOSC (kHz) Reference Voltage, VREF (V) 0.816 0.812 0.808 0.804 0.800 0.796 0.792 0.788 0.784 -50 -25 0 25 50 75 100 125 630 620 610 600 590 580 570 560 550 -50 150 -25 0 25 50 75 100 125 150 Junction Temperature (°C) Junction Temperature (oC) Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 640 7 www.anpec.com.tw APW7058 Operating Waveforms (Refer to the typical application circuit) 1.VOUT1 Load Transient Response : IOUT = 0A -> 10A -> 0A - IOUT1 slew rate = ±10A/µS IOUT = 0A -> 10A IOUT = 0A -> 10A -> 0A IOUT = 10A -> 0A VOUT1 VOUT1 VOUT1 VUGATE VUGATE 10A IOUT1 IOUT1 0A Ch1 : VOUT1, 100mV/Div, DC, Offset = 1.25V Ch2 : VUGATE, 10V/Div, DC Ax1 : IOUT1, 5A/Div Time : 5µS/Div BW = 20MHz IOUT1 Ch1 : VOUT1, 100mV/Div, DC, Offset = 1.25V Ax1 : IOUT1, 5A/Div Time : 100µS/Div BW = 20MHz Ch1 : VOUT1, 100mV/Div, DC, Offset = 1.25V Ch2 : VUGATE, 10V/Div, DC Ax1 : IOUT1, 5A/Div Time : 5µS/Div BW = 20MHz 2.VOUT2 Load Transient Response : IOUT = 0.2A -> 3A -> 0.2A - IOUT2 slew rate = ±3A/µS IOUT = 0.2A -> 3A IOUT = 0.2A -> 3A -> 0.2A IOUT = 3A -> 0.2A VOUT2 VOUT2 VOUT2 3A IOUT2 IOUT2 IOUT2 0.2A Ch1 : VOUT2, 50mV/Div, DC, Offset = 2.50V Ax1 : IOUT2, 1A/Div Time : 1µS/Div BW = 20MHz Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 Ch1 : VOUT2, 50mV/Div, DC, Offset = 2.50V Ax1 : IOUT2, 1A/Div Time : 50µS/Div BW = 20MHz 8 Ch1 : VOUT2, 50mV/Div, DC, Offset = 2.50V Ax1 : IOUT2, 1A/Div Time : 1µS/Div BW = 20MHz www.anpec.com.tw APW7058 Operating Waveforms (Cont.) 3. Powering ON / OFF Soft-start at Powering ON Powering OFF +12V +12V +5V +5V VOUT2 VOUT2 VOUT1 VOUT1 Ch1 : +5V, 1V/Div, DC Ch2 : +12V, 2V/Div, DC Ch3 : VOUT1, 1V/Div, DC Ch1 : +5V, 1V/Div, DC Ch2 : +12V, 2V/Div, DC Ch3 : VOUT1, 1V/Div, DC Ch4 : VOUT2, 1V/Div, DC Time : 5mS/Div BW = 20MHz Ch4 : VOUT2, 1V/Div, DC Time : 1mS/Div BW = 20MHz 4. UGATE and LGATE UGATE Rising UGATE Falling IOUT=10A IOUT=10A VUGATE VUGATE VLGATE VLGATE Ch1 : VUGATE, 2V/Div, DC Ch2 : VLGATE, 2V/Div, DC Time : 50nS/Div BW = 500MHz Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 Ch1 : VUGATE, 2V/Div, DC Ch2 : VLGATE, 2V/Div, DC Time : 50nS/Div BW = 500MHz 9 www.anpec.com.tw APW7058 Packaging Information E e1 0.015X45 SOP-8 pin ( Reference JEDEC Registration MS-012) H e2 D A1 1 L 0.004max. Dim A Mi ll im et er s Inche s A Min . 1. 35 Max . 1. 75 Min. 0. 053 Max . 0. 069 A1 D E 0. 10 4. 80 3. 80 0. 25 5. 00 4. 00 0. 004 0. 189 0. 150 0. 010 0. 197 0. 157 H L e1 e2 5. 80 0. 40 0. 33 6. 20 1. 27 0. 51 0. 228 0. 016 0. 013 0. 244 0. 050 0. 020 φ 1 Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 1. 27B S C 0. 50B S C 8° 8° 10 www.anpec.com.tw APW7058 Physical Specifications Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. 2500 devices per reel Reflow Condition (IR/Convection or VPR Reflow) tp TP Critical Zone T L to T P Temperature Ram p-up TL tL Tsm ax Tsm in Ram p-down ts Preheat 25 t 25 °C to Peak Tim 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.3 - Mar., 2005 11 www.anpec.com.tw APW7058 Reliability test program Test item SOLDERABILITY HOLT PCT TST ESD Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD 78 Description 245°C , 5 SEC 1000 Hrs Bias @ 125 °C 168 Hrs, 100 % RH , 121°C -65°C ~ 150°C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , Itr > 100mA Carrier Tape & Reel Dimension t D P Po E P1 F W Ao D1 Ko T2 J C A B T1 SOP-8 A 330±1 Application SOP-8 F 5.5 ± 0.1 Application B 62 ± 1.5 C 12.75 + 0.1 5 J 2 + 0.5 D D1 Po 1.55±0.1 1.55+ 0.25 4.0 ± 0.1 T1 12.4 +0.2 T2 2± 0.2 W 12 + 0.3 - 0.1 P1 2.0 ± 0.1 Ao 6.4 ± 0.1 Bo 5.2± 0.1 P 8± 0.1 E 1.75± 0.1 Ko t 2.1± 0.1 0.3±0.013 (mm) Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 12 www.anpec.com.tw APW7058 Cover Tape Dimensions Application SOP- 8 Carrier Width 12 Cover Tape Width 9.3 Devices Per Reel 2500 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.3 - Mar., 2005 13 www.anpec.com.tw