SP6652EB SIPEX | Alldatasheet
Document overview
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Technical content
Rev 03/20/06 SP6652 Evaluation Board Manual Copyrig ht Sipex Corporation
DESCRIPTION
The SP6652 Evaluation Board is designed to help the user evaluate the performance of the SP6652 for use as a single Li-Ion battery Step-Down DC-DC Converter. The SP6652 operates from 2.7V to 6.5V input, with the highest efficiency in the range 3.0V to 4.2V where the Li-Ion battery has the most energy. The SP6652EB evaluation board is a complete power supply circuit to provide ease of evaluation for the DC/DC Converter performance. SP6652 3.3V OUTPUT EVALUATION BOARD SCHEMATIC /square4 High Efficiency Synchronous Step-Down Converter with up to 97% efficiency /square4 1000mA Output Current /square4 2.7V-5.5V Input Voltage range, Output Adjustable down to 0.8V /square4 µSOIC Package & Ceramic Capacitors for small, low profile Power Supply /square4 Ideal for PDAs, Digital Cameras, Wireless Modems, Cellular Telephones SP6652 EB Evaluation Board Manual
USING THE EVALUATION BOARD 1) Powering up the SP6652 Circuit & Programming the UVLO threshold The SP6652 Evaluation Board can be powered from a single Li-Ion battery or a +2.7 to +5.0V power supply. Connect with short leads directly to the “Vin” and “Gnd” posts. Note the SP6652 will remain in “shutdown” until SD pin Jumper J1 is applied to the VIN position pin 1 to 2. 2) VOUT PROGRAMMING The SP6652 requires 2 feedback resistors to control the output voltage. Connect the appropriate resistors RF and RI (Table 2) from pin 3 SP6652 FB to Vout and to the GND. For Vout different from that shown in the schematic, use equation: RI Vout RF • −= 180 . 0 SP6652EB BILL OF MATERIALS Component Vo = 3.3V CIN 10uF, TDK C2012X5R0J106M, 0.005ohm, 6.3V, X5R, 0 805 COUT 10uF, TDK C2012X5R0J106M, 0.005ohm, 6.3V, X5R, 0805 CVIN 1uF, TDK C1608X5R0J105M, 0.03ohm, .3V, X5R, 060 3 Cc 10nF ceramic, 0603 RVIN 10 Ohm 5%, 0603 RI 200k 1%, 0603 RF 634k 1%, 0603 Rz 4.02k 1%, 0603 U1 SP6652EU, 10 pin uSOIC
3) POWER SUPPLY DATA SP6652 Efficiency vs Load Vout = 3.3V 100 1.0 10.0 100.0 1000.0 ILoad (mA) Efficiency (%) Vi=3.6V Vi=3.9V Vi=4.2V Vi=5.0V SP6652 Load Regulation, Vout = 3.3V 3.250 3.270 3.290 3.310 3.330 3.350 1 10 100 1000 ILoad (mA) Vout (V) Vi=3.6V Vi=3.9V Vi=4.2V Vi=5.0V
4) EVALUATION BOARD LAYOUT SP6652EB COMPONENT PLACEMENT SP6652EB PC LAYOUT TOP SIDE SP6652EB PC LAYOUT BOTTOM SIDE