SP6122EB SIPEX | Alldatasheet
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Technical content
Rev. 5/23/01 SP6122 Evaluation Board Manual © Copyright 2001 Sipex Corporation
DESCRIPTION
The SP6122 Evaluation Board is designed to help the user evaluate the performance of the SP6122 for use as a low voltage input, low voltage output PFET Buck DC-DC Controller. The SP6122 operates from a 5V or 3.3V input supply, and delivers output voltages as low as 1.5V with an accuracy of 1.5% over line, load and temperature. Unlike other “Micro-8” parts, the SP6122 has an array of value added features for you to evaluate including: optional hiccup mode, over-current protection and fault flag output. The evaluation board is a completely assembled and tested surface mount power supply board which provides easy access to the SP6122 Input and Outputs so that the user can quickly measure electrical characteristics and waveforms. The next two sections describe the SP6122 Board Layout and Using the SP6122 Evaluation Boards. A section on SP6122 Power Supply Data is also included with graphs on Efficiency, Line and Load Regulation. Then, drawings of the PC Layout and a schematic are included as a design-in tool for the user of the SP6122. Finally, a SP6122 Evaluation Board List of Materials table is provided with some manufacturers part numbers to use as a reference. BOARD LAYOUT The SP6122 Evaluation Board has been designed for quick and easy connection to the Input and Output of the SP6122 Power Supply under test. Position the board with the silkscreen lettering upright, (also see the drawing on the front page of this manual) and you will see U1 the SP6122 8-pin µSOIC, in the center left of the board. To the left of U1 are the output capacitor Cout and the Vout pin. To the right of U1 are Q1 and the Vin post and the input capacitor Cin. Below Cin and Cout are the two GND posts. § Easy Evaluation for the SP6122 Low Voltage PFET Buck Converter § Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters § Very Accurate 1.5% Reference over Line, Load, Temperature § Small Micro 8 Package SP6122 Evaluation Board Manual
Output Voltage and connect the Load between the “Vout” post and the 2nd “GND” post. charging, and I is the Enable pin source current of 4uA. Table 1. SP6122 Enable/Hiccup Jumper Therefore, Δ Vout = Δ i3*R1=+20uA/-7uA*R1. voltage will be +10mV/-3.5mV.
just short a wire across R1. Figure 1. Schematic: Output Voltage Divider Resistors Evaluation Board Efficiency plot, with efficiencies to 88% and output currents to 4A.
Rev. 5/23/01 SP6122 Evaluation Board Manual © Copyright 2001 Sipex Corporation FIGURE 8: SP6122 EVALUATION BOARD SCHEMATIC TABLE 2: SP6122EB LIST OF MATERIALS
ORDERING INFORMATION
Ref. Qty. Manuf. Manuf. Layout Component Vendor Des. Part Number Size Phone Number PCB 1 Sipex 146-6427-00 1"X1.5" SP6120 Eval PCB 978-667-7800 U1 1 Sipex SP6122UEB uSO-8 5A PFET Buck Ctrl 978-667-7800 Q1 1 Fairchild FDS6375 SO-8 PFET 310-322-3331 DS 1 STMicroelectronics STPS2L25U SMB 2A Schottky 10A RMS 781-861-2650 L1 1 Coilcraft DO3316P-222 12.9x9.4mm 2.2uH Coil 5A 0.012ohm 847-639-6400 CIN 1 TDK C4532X5R0J476M 1812 47uF Ceramic SM 6.3V 847-803-6100 COUT 1 Sanyo 6TPB470M 7343H 470uF 6.3V 0.035ohm 978-922-6573 CI 1 TDK C3216X5R1C475K 1206 4.7uF 10V SM X5R 847-803-6100 CEN 1 Panasonic ECJ-1VB1H472K 0603 4700pF Ceramic X7R 50V 800-DIGI-KEY R1 1 Panasonic ERJ-8ENF5000V 1206 500 OHM Thick Film Res 1% 800-DIGI-KEY R2 1 Panasonic ERJ-8ENF1911V 1206 1.91K OHM Thick Film Res 1% 800-DIGI-KEY RS 1 Panasonic ERJ-8ENF1001V 1206 1.00K OHM Thick Film Res 1% 800-DIGI-KEY