SP4446EB SIPEX | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 4
Technical content
DESCRIPTION
The SP4446 Evaluation Boards are designed to help the user evaluate the performance of the SP4446 for use as a single or dual cell input to +5V output DC-DC Converter. The SP4446 have a fixed output voltage programmed to +5V (consult the factory for other voltage options). The evaluation board is a completely assembled and tested surface mount board which provides easy probe access points to all SP4446 Inputs and Outputs so that the user can quickly connect and measure electrical characteristics and waveforms. SP4446 EVALUATION BOARD SCHEMATIC Easy Evaluation for the SP4446 2V to 7V input to 25 to 30V Output SP4446 provides up to 30mA output current High Efficiency: up to 80% SOT23-5 Package & SMT components for small, low profile Power Supply SP4446 Evaluation Board Manual 1.0M Open 61.9K J1 SHDN 1.2V to 5V LOAD 4.7uF Murata LQH32CN100K11 330pF Vout 2.2uF L1 10uH 0.45A U1 SP4446 SW GND FB SHDN Vin MBR0530
USING THE EVALUATION BOARD 1) Powering Up the SP4446 Circuit The SP4446 Evaluation Board can be powered from inputs from a +1.2V to +7.0V. Connect with short leads directly to the “Vin” and “Gnd” posts. Monitor the Output Voltage and connect the Load between the “Vout” post and the 2nd “GND” post. 2) Using the J1 Jumper: Enabling the SP4446 Output and using the Shutdown Mode The SP4446 output will be Enabled if the J1 Jumper is in the top or pin 1 to 2 position. If J1 is in the pin 2 to 3 position, the Shutdown pin is brought to GND, which puts the SP4446 in the low quiescent Shutdown Mode. 3) Selecting the Inductor In selecting an inductor, the saturation current specified for the inductor needs to be greater then the SP4446 peak current to avoid saturating the inductor, which would result in a loss in efficiency and could damage the inductor. The SP4446 evaluation board uses a Murata 10uH inductor with an Isat value of 450mA and a DCR of 0.39ohms, which easily handles the Ipeak of 350mA of the SP4446 and will deliver high efficiencies. Other inductors could be selected provided their Isat is greater than the Ipeak of the SP4446. POWER SUPPLY DATA
TABLE1: SP4446 LIST OF MATERIALS
ORDERING INFORMATION
Model Temperature Range Package Type Ref. Des. Qty. Manufacturer Part Number Layout Size Component Vendor LxWxH 1 Sipex Corp. 146-6478-00 1"x1.5" SP4446 Eval PC Board Sipex 978-667-8700 U1 1 Sipex Corp. SP4446EK SOT23-5 5-pin SOT23 Step-Up DC/DC Conv Sipex C1 1 Murata GRM1885C1H331JA01B 0603 Ceramic 330pF SM Murata 770-436-1300 C2 1 open C3 1 Murata GRM32RR71E225KC01B 1210 Ceramic 25V 2.2uF SM Murata 770-436-1300 C4 1 Murata GRM31CR61A475KA01B 1206 Ceramic 10V 4.7uF SM Murata 770-436-1300 L1 1 Murata LQH32CN100K11 3.2x2.5x2mm 10uH, 0.45A, 0.39ohm, SM Inductor Murata 770-436-1300 D1 1 On-Semi MBR0530 SOD-123 Schottky Diode 30V, 0.5A On-Semi R1 1 Panasonic ERJ-3EKF1004 0603 1M ohm 1/8W 1% 0603 SM Digi-Key 800-344-4539 R2 1 Panasonic ERJ-3EKF6192 0603 61.9K ohm 1/8W 1% 0603 SM Digi-Key 800-344-4539 TP 4 Mill-Max 0300-115-01-4727100 .042 Dia Test Point Female Pin Digi-Key 800-344-4539 J1 1 Sullins PTC36SAAN .23x.12 3-Pin Header Digi-Key 800-344-4539 1 Sullins STC02SYAN .2x.1 Shunt Digi-Key 800-344-4539