SP7653 Wide Input Voltage Range, TM 1.3MHz, Buck Regulator Power Blox SP7653 SP7653 FEATURES DFN PACKAGE DFN PACKAGE 7mm x 4mm 7mm x 4mm 2.5V to 20V Step Down Achieved Using Dual Input 26 1 P LX GND Output Voltage down to 0.8V P GND 1 26 LX BOTTOM VIEW P 25 BOTTOM VIEW GND LX 2 3A Output Capability P GND 2 25 LX Heatsink Pad 1 Heatsink Pad 1 P LX 24 3 GND Connect to Lx Built in Low R Power Switches (40 m1 typical) P DSON GND 3 LX Connect to Lx 24 23 GND LX 4 Highly Integrated Design, Minimal Components GND 4 23 LX 22 5 V V FB 1.3MHz Fixed Frequency Operation CC V FB 5 22 V CC 21 6 COMP GND UVLO Detects Both V and V CC IN COMP 6 Heatsink Pad 2 21 GND Connect to GNDHeatsink pad 2 UV 7 IN 20 Over Temperature Protection GND UVIN 7 Connect to GND 20 GND 8 GND 19 Short Circuit Protection with Auto-Restart GND GND 8 19 GND 9 SS Wide BW Amp Allows Type II or III Compensation BST 18 SS 9 18 BST 10 V Programmable Soft Start NC 17 IN Heatsink Pad 3 V IN 10 17 NC Connect to VIN V Fast Transient Response 11 IN LX 16 Heatsink pad 3 V IN 11 16 LX Connect to V IN High Efficiency: Greater than 95% Possible 12 V LX 15 IN V IN 12 15 LX Asynchronous Start-Up into a Pre-Charged Output 14 13 V LX IN V 14 IN 13 LX Small 7mm x 4mm DFN Package U.S. Patent 6,922,041 Now Available in Lead Free Packaging DESCRIPTION The SP7653 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be especially attractive for dual supply, 12V to 20V distributed power systems stepped down with 5V used to power the controller. This lower V voltage minimizes power dissipation in the part and is used to drive the top switch. The SP7653 CC is designed to provide a fully integrated buck regulator solution using a fixed 1.3MHz frequency, PWM voltage mode architecture. Protection features include Under Voltage Lock Out (UVLO), thermal shutdown and output short circuit protection. The SP7653 is available in the space saving DFN package. TYPICAL APPLICATION CIRCUIT L1 IHLP2525CZER2R2M01 U1 2.2uH, Irate=8A SP7653 DCR=18m 1 1 26 PGND LX VOUT 2 25 PGND LX 3.30V CZ2 RZ2 C3: X5R C3 3 24 RZ3 PGND LX 0-3A CERAMIC 158 1 ,1% 1.5nF 38.3k 1 , 1% 4 23 47uF GND LX R1 CP1 6.3V 5 22 CZ3 68.1k 1 ,1% VFB VCC 3.3pF 6 21 820pF COMP GND CVCC 7 20 2.2uF UVIN GND CF1 GND2 100pF 8 19 GND GND 9 18 R2 SS BST RBST 10 17 21.5k 1 ,1% CSS VIN NC 5.11 1 , 22nF 11 16 1% DBST VIN LX 12 15 SD101AWS VIN LX CBST 13 14 1uF VIN LX VIN 12V Fs=1.3MHz U2 R3 SPX5205 200k 1 ,1% C1,C5: 1 5 VIN VOUT Notes: C1 C5 CERAMIC 2 U1 Bottom-Side Layout should have 22uF GND 22uF X5R 16V three Contacts which are 3 4 16V EN BYP isolated from one another: QT- R4 C2 Drain Contact, QB-Drain Contact and 100k 1 ,1% 0.1uF GND Controller-GND Contact. ALL RESISTORS & CAPACITORS ARE SIZE 0603 UNLESS OTHERWISE SPECIFIED. Date: 2/17/06 SP7653 Wide Input Voltage Range, 1.3MHz, Buck Regulator Copyright 2006 Sipex Corporation Date: /20/06 SP7653 Wide Input Voltage Range, .3MHz, Buck Regulator Copyright 2006 Sipex Corporation 1ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V .................................................................................................. 7V CC V ........................................................................................................................................... 20V IN I ............................................................................................................................................... 5A Storage Temperature .................................................. -65C to 150C LX BST ............................................................................................... 27V Power Dissipation ...................................... Internally Limited via OTP LX-BST ............................................................................. -0.3V to 7V ESD Rating .......................................................................... 2kV HBM LX ....................................................................................... -1V to 20V Thermal Resistance V .................................................................................... 5 C/W JC All other pins .......................................................... -0.3V to V +0.3V CC ELECTRICAL SPECIFICATIONS Unless otherwise specified: -40 C < T < 85 C, -40 C< Tj< 125 C, 4.5V < V < 5.5V, 3V< Vin< 28V, Boost=LX + 5V, AMB CC LX = GND = 0.0V, UV = 3.0V, CV = 1 F, C = 0.1 F, C = 50nF, Typical measured at V = 5V. IN CC COMP SS CC The z denotes the specifications which apply over the full temperature range, unless otherwise specified. PARAMETER MIN. TYP. MAX. UNITS CONDITIONS QUIESCENT CURRENT V Supply Current (No switching) 1.5 3 mA V =0.9V CC FB V Supply Current (switching) 8 mA CC Boost Supply Current (No 0.2 0.4 mA V =0.9V FB switching) Boost Supply Current (switching) 4.0 mA PROTECTION: UVLO V UVLO Start Threshold 4.00 4.25 4.5 V CC V UVLO Hysteresis 100 200 300 mV CC UVIN Start Threshold 2.3 2.5 2.65 V UVIN Hysteresis 200 300 400 mV UVIN Input Current 1 A UVIN= 3.0V ERROR AMPLIFIER REFERENCE 2X Gain Config., Measure Error Amplifier Reference 0.792 0.800 0.808 V V V =5 V, T=25C FB CC Error Amplifier Reference 0.788 0.800 0.812 V Over Line and Temperature Error Amplifier Transconductance 6 mA/V Error Amplifier Gain 60 dB No Load COMP Sink Current 150 A V =0.9V, COMP= 0.9V FB COMP Source Current 150 A V =0.7V, COMP= 2.2V FB V Input Bias Current 50 200 nA V = 0.8V FB FB Internal Pole 4 MHz COMP Clamp 2.5 V V =0.7V, TA=25C FB COMP Clamp Temp. Coefficient -2 mV/C Date: 2/17/06 SP7653 Wide Input Voltage Range, 1.3MHz, Buck Regulator Copyright 2006 Sipex Corporation Date: /20/06 SP7653 Wide Input Voltage Range, .3MHz, Buck Regulator Copyright 2006 Sipex Corporation 2 2