APW7037RC-TU

APW7037/A/B 8-PIN Synchronous Buck PWM Controller Features • • • Operating with Single 5V or 12V Input Drives N-Channel MOSFETs Simple Single-Loop Control Design General Description The APW7037 series are designed to provide a low cost synchronous Buck regulator for on-board DC to DC converter applications. The APW7037 series together with dual N-channel MOSFETs such as APM7313, provide a low cost solution for such applications. Each device features an internal 200/ 400kHz oscillator, Power-On-Reset (POR) for both VCC and VC supplies, an external programmable soft-start function as well as output under-voltage detection that latches off the device when an output short is detected. − Voltage-Mode PWM Control − Full 0% to 100% Duty Ratio − Fast Transient Response • ±2% Output Voltage Accuracy Over Temperature • Under-Voltage Protection for Output • 200/400kHz Constant Frequency Operation -200kHz for APW7037 & APW7037B -400kHz for APW7037A • • Small size, 8-PIN Package (SOIC or TSSOP) Lead Free Available (RoHS Compliant) Pin Description Applications • • • • Graphics Cards DDR Memory Power Supply DDR Memory Termination Voltage Low-Voltage Distributed Power Supplies FB VCC LDRV GND 1 2 3 4 8 7 6 5 SS COMP VC HDRV 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.6 - Apr , 2005 1 www.anpec.com.tw APW7037/A/B Ordering and Marking Information APW 7037/A/B Lead Free Code Handling Code Temp. Range Package Code APW 7037/A/B XXXXX APW 7037/A/B XXXXX Package Code K : SO-8 R : TSSOP-8 Operating Junction Temp. Range C : 0 to 70°C Handling Code TU : Tube TR : Tape & Reel Lead Free Code L : Lead Free Device Blank : Original Device XXXXX - Date Code APW 7037/A/B K : APW 7037/A/B R : XXXXX - Date Code 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 SS 20uA 4.5V 3.3V Max . 64uA POR Pow er On Res et Regulator V CC VC HDRV Under-V oltage V F BU V 25k Gate Control V CC FB 25k V R EF Error A mp. OSC FOSC PW M LDRV CO M P G ND Absolute Maximum Ratings Description VCC to GND VC to GND Operating Junction Temperature Storage Temperature Soldering Temperature (10 Seconds) Minimum ESD Rating Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 2 Rating -0.2~30 -0.2~30 0~125 -65~150 300 ±2 Unit V V °C °C °C kV www.anpec.com.tw APW7037/A/B Thermal Characteristics Symbol θJA Parameter Thermal Resistance in Free Air 8-pin SOIC 8-pin TSSOP Value 160 124 Unit °C/W Electrical Characteristics Unless otherwise specified, these specifications apply over VCC=5V, VC=12V and TA=0 to 70°C. Typical values refer to TA=25°. APW7037/A/B Symbol Parameter Test Conditions Min. Typ. Max. SUPPLY CURRENT ICC IC ICCQ ICQ VCC Dynamic Supply Current VC Dynamic Supply Current VCC Static Supply Current VC Static Supply Current Rising VCC Threshold VCC POR Hysteresis Rising VC Threshold VC POR Hysteresis OSCILLATOR APW7037 FOSC ∆VOSC IFB1 IFB2 GM Free Running Frequency Ramp Amplitude FB Pin Input Bias Current FB Pin Input Bias Current Transconductance SS=3V, VFB=1V SS=0V, VFB=1V 450 APW7037A APW7037B ERROR AMPLIFIER 1 -64 600 750 nA µA µmho 180 360 180 200 400 200 1.10 220 440 220 V KHz 3.1 FOSC=200KHz, CL=1500pF FOSC=200KHz, CL=1500pF SS=GND SS=GND 2 2 0.5 0.2 4.0 3 5.5 1.5 0.4 4.2 0.25 3.3 0.2 3.5 5 8 3 1 4.4 mA mA mA mA V V V V Unit POWER-ON RESET REFERENCE VOLTAGE APW7037 1.225 1.250 1.275 VFB LREG FB Pin Regulation Voltage VFB Line Regulation VCC = 5~12V 3 APW7037A 0. 784 0. 800 0. 816 APW7037B 0.784 0.800 0.816 0.2 0.35 V % Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 www.anpec.com.tw APW7037/A/B Electrical Characteristics (Cont.) Unless otherwise specified, these specifications apply over VCC=5V, VC=12V and TA=0 to 70°C. Typical values refer to TA=25°C. APW7037/A/B Symbol GATE DRIVERS HDRV Rising Time HDRV Falling Time LDRV Rising Time LDRV Falling Time Dead Band Time PROTECTION VFBUV FB Under-Voltage Threshold VFB Falling APW7037 APW7037A APW7037B VSD ISS Shutdown Threshold Voltage Pull the voltage of SS pin Soft-Start Current SS=0 10 0.4 0.3 0.3 0.6 0. 4 0.4 0.5 20 30 0.8 0. 5 0.5 V µA V CL = 1500pF CL = 1500pF CL = 1500pF CL = 1500pF 50 20 15 25 25 150 50 50 50 50 250 nS nS nS nS nS Parameter Test Conditions Min. Typ. Max. Unit Functional Pin Description FB (Pin 1) Connect this pin to the output (VOUT) of the PWM converter via an external resistor divider to provide a voltage feedback path for the converter. The output voltage set by the resistor divider is determined using the following formula : R OUT VOUT = VREF x ( 1+ ) R GND are measured with respect to this pin. HDRV (Pin 5) Connect this pin to the gate of the high-side power MOSFET. This pin provides the gate drive for the MOSFET. VC (Pin 6) This pin provides bias voltage to the high-side MOSFET driver. A bootstrap circuit may be used to pump a boot voltage for enforcing the driving capability of the gate driver and improving the performance of the MOSFET. COMP (Pin 7) This pin is the output of the error amplifier. Add an external resistor-capacitor network to provide a loop compensation for the PWM converter. SS (Pin 8) Connect a capacitor from this pin to ground.This capacitor, along with an internal 20uA current source, sets the soft-start interval of the PWM converter and prevents the outputs from overshoot as well as limits the input current. Pull this pin below 0.5V can shutdown the converter. 4 www.anpec.com.tw where ROUT is the resistor connected from VOUT to FB , and RGND is the resistor connected from FB to ground. The voltage at this pin is also monitored for UnderVoltage protection. VCC (Pin 2) Connect this pin to input voltage from 5V to 20V. This pin provides the bias for the control circuitry and the low-side power MOSFET driver (LDRV). The voltage at this pin is monitored for Power-On Reset (POR) purpose. LDRV (Pin 3) Connect this pin to the gate of the low-side power MOSFET. This pin provides the gate drive for the MOSFET. GND (Pin 4) Signal and power ground for the IC. All voltage levels Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 APW7037/A/B Typical Applications 1. Dual supply voltage(5V and 12V) application R4 3 C1 1uF + 12V C2 1uF V CC VC C5 1uF C4 100uF L3 1uH V IN + 5V C3 47uF 6 2 Q2 A P M 2300A C7 0.1uF 8 SS HDRV 5 U1 A P W 7037 3 7 LDRV CO M P Q 1A A P M 7313 L4 3.3uH V OU T 1.5V /5 A Shutdown Q 1B A P M 7313 R1 249 R2 1.24k C6,C9 2 x 150uF R3 24k G ND FB 1 C8 2200pF 4 2. Single supply voltage(5V) application R4 3 D1 1N4148 C2 1uF C6 1uF C3 0.1uF 8 SS H DR V 5 D3 1N4148 C1 1uF 6 2 V CC D2 1N4148 V IN + 5V C4 47uF VC C5 100uF L3 1uH Q2 A P M 2300A C8 0.1uF U1 A P W 7037 3 7 LD RV CO M P Q1A A P M 7312 L4 3.3uH V OU T 1.5V /5 A Shutdown Q1B A P M 7312 R1 249 R2 1.24k C7,C10 2 x 150uF R3 24k G ND FB 1 C9 2200pF 4 Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 5 www.anpec.com.tw APW7037/A/B Typical Applications (Cont.) 3. LCD Monitor Application Circuit R8 0 R4 3 C11 1uF Q2 2N3904 E x tra Circ uit for V IN> 15V A pplic ation R7 1k D2 1N4148 R5 18k R6 10k C12 0.1uF U2 A P L431 D1 1N4148 C1 1uF 6 2 V CC VC C2 1uF C3 0.1uF C6 1uF C5 470uF L3 1uH C4 47uF V IN 9V ~ 22V 8 SS HDRV 5 C8 0.1uF U1 A P W 7037 3 7 LDRV CO M P Q 1A A P M 7313 R9 12 Q 1B A P M 7313 R10 12 L4 50uH V OU T 5V / 0.2~ 5 A C7,C10 2 x 470uF R1 3k R3 24k G ND FB 1 C9 2200pF R2 1k Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 4 6 www.anpec.com.tw APW7037/A/B Package Information SOP-8 pin ( Reference JEDEC Registration MS-012) E H e1 D e2 A1 A 1 L 0.004max. Dim A A1 D E H L e1 e2 φ1 Mi ll im et er s Min. 1. 35 0. 10 4. 80 3. 80 5. 80 0. 40 0. 33 1. 27B S C 8° Max . 1. 75 0. 25 5. 00 4. 00 6. 20 1. 27 0. 51 Min. 0. 053 0. 004 0. 189 0. 150 0. 228 0. 016 0. 013 0.015X45 Inche s Max . 0. 069 0. 010 0. 197 0. 157 0. 244 0. 050 0. 020 0. 50B S C 8° Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 7 www.anpec.com.tw APW7037/A/B Package Information TSSOP-8 e 87 2x E/2 E1 E S ( 2) GAUGE PLANE 1 2 e/2 D A2 A b A1 0.25 L (L1) ( 3) 1 Dim A A1 A2 b D e E E1 L L1 R R1 S φ1 φ2 φ3 Millimeters Min. 0.00 0.80 0.19 2.9 0.65 BSC 6.40 BSC 4.30 0.45 1.0 REF 0.09 0.09 0.2 0° 0.004 0.004 0.008 0° 4.50 0.75 0.169 0.018 Max. 1.2 0.15 1.05 0.30 3.1 Min. 0.000 0.031 0.007 0.114 Inches Max. 0.047 0.006 0.041 0.012 0.122 0.026 BSC 0.252 BSC 0.177 0.030 0.039REF 12° REF 12° REF 8° 12° REF 12° REF 8° Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 8 www.anpec.com.tw APW7037/A/B 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 TP (IR/Convection or VPR Reflow) tp C ritical Z one T L to T P R am p-up T e m p e ra tu re TL T sm ax tL 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 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. www.anpec.com.tw 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 Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 9 Note: All temperatures refer to topside of the package. Measured on the body surface. APW7037/A/B 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 Dimensions t P P1 D Po E F W Bo Ao Ko D1 T2 J C A B T1 Application A 330±1 B 62 ± 1.5 D SOP-8 F C 12.75 +0.15 D1 J 2 + 0.5 Po T1 12.4 +0.2 P1 2.0 ± 0.1 T1 12.4 ± 0.2 P1 2.0 ± 0.1 T2 2± 0.2 Ao 6.4 ± 0.1 T2 2 ± 0.2 Ao 7.0 ± 0.1 W 12 + 0.3 - 0.1 Bo 5.2± 0.1 W 12± 0. 3 Bo 3.6 ± 0.3 P 8± 0.1 Ko 2.1± 0.1 P 8± 0.1 Ko E 1.75± 0.1 t 0.3±0.013 E 1.75±0.1 t 5.5 ± 0.1 1.55 ±+0.1 1.55+0.25 4.0 ± 0.1 Application A 330 ± 1 TSSOP-8 F B 62 +1.5 D C 12.75+ 0.15 D1 1.5 + 0.1 J 2 + 0.5 Po 4.0 ± 0.1 5.5 ± 0. 1 1.5 + 0.1 1.6 ± 0.1 0.3±0.013 (mm) Copyright  ANPEC Electronics Corp. Rev. A.6 - Apr, 2005 10 www.anpec.com.tw APW7037/A/B Cover Tape Dimensions Application SOP- 8 TSSOP- 8 Carrier Width 12 12 Cover Tape Width 9.3 9.3 Devices Per Reel 2500 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.6 - Apr, 2005 11 www.anpec.com.tw