PAM2316 EVB User Guide PAM2316 TDFN EV Board User Guide AE Department 1. Revision Information Date 2011/08 Revision V1.0 Description Initial Release Comment 2. PAM2316 General Description The PAM2316 is a 2A step-down converter with a typical input voltage of 3.3V and a fixed output voltage of 1.2V or an adjustable output. The 3MHz switching frequency enables the use of small external components. The ultra-small 2mm x 2mm footprint and high efficiency make the PAM2316 an ideal choice for portable applications. The PAM2316 delivers 2A maximum output current while consuming only 55uA no-load quiescent current. Low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the PAM2316 the ideal choice for high output voltage, high current applications which require a low dropout threshold. The PAM2316 provides excellent transient response and output accuracy across the operating range. The PAM2316 maintains high efficiency throughout the load range. The PAM2316 automatically optimizes efficiency during light load mode (PSM) and maintains constant frequency and low output ripple during PWM mode. Over-temperature and short circuit protection safeguard the PAM2316 and system components from damage. The PAM2316 is available in a Pb-free, ultra-small, low profile, 8-pin 2mm x 2mm TDFN package. The product is rated over a temperature range of -40°C to 85°C. This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM2316 EVB User Guide 3. Key Features z 2A Maximum Output Current z Tiny 0.47µH Chip Inductor z Excellent Transient Response z 55µA No Load Quiescent Current z Input Voltage: 2.7V to 5.5V z 100% Duty Cycle Low-Dropout Operation z Ultra-small, Low Profile 8-pin 2mm x 2mm z Internal Soft Start TDFN Package z Over-Temperature and Current Limit z z High Efficiency with 3MHz Switching Frequency Fixed or Adjustable Output Voltage Protection Options: z <1µA Shutdown Current - Fixed Output Voltage: 1.2V z -40°C to 85°C Temperature Range - Adjustable Output Voltage: 1.0V to z Pb-Free/Halogen Free Package 3.3V z RoHS/REACH Compliant 4. EV Board Schematic IC1 1 C2 PGND SW SW 8 L1 C1 2 Vin EN 3 1 Vin 2 EN FB 4 PVin SW Vin EN FB AGND C3 7 6 Vo EN R1 C4 R2 5 3 5. EVB PAM2316 EB18AAA Description PAM2316 EB18AA is an evaluation board for the PAM2316 8pin 2mm x 2mm TDFN, a DC/DC converter. The board is targeted to be used in providing a simple and convenient evaluation environment for the PAM2316. Requires parts, power supply connectors etc. on the board, which makes it easy to be evaluated. This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM2316 EVB User Guide 6. EV Board View Top View 7. Resistor Select for Output Voltage Setting VOUT = (1+R1/R2)×VREF Vo 1.2V 1.5V 1.8V 2.5V 3.3V (VREF = 0.6V) R1 150k 225k 300k 475k 680k R2 150k 150k 150k 150k 150k L 0.47µH 0.47µH 0.47µH 1.0µH 1.0µH This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM2316 EVB User Guide 8. External Compnents Selection Input & output Capacitors (C1, C2, C3) (1) For lower output ripple, low ESR is required. (2) Low leakage current needed, X5R/X7R ceramic recommend, multiple capacitor parallel connection. Feed forward capacitor (C4) (1) Lower the output ripple (2) Low leakage current needed, 100pF, COH/CH ceramic recommend Output Voltage programmer resistors (R1, R2) (1) For programmer output voltage (2) For accurate output voltage, 1% tolerance is required. Inductor (L1) (1) Low DCR for good efficiency (2) Inductance saturate current must higher than the output current 9. Evaluation Board BOM List: Item Value C1 10µF C2 1µF C3 10µF C4 100pF L1 0.47µH R1 R2 150K 150K Type X5R/X7R, Ceramic/0805 X5R/X7R, Ceramic/0603 X5R/X7R, Ceramic/0805 COH/CH, Ceramic/0402 0603 0603 IC1 PAM2316 PCB PAM2316 EB18AA Rating 10V 25V Description Input Coupling CAP Input Coupling CAP 10V Output CAP 50V Feed Forward CAP >3A Inductor 1% 1% TDFN 2 x 2 8pin Voltage Set RES Vender and Part No. TAIYO YUDEN EMK212ABJ106KD-T TAIYO YUDEN TMK107 BJ105KA-T TAIYO YUDEN EMK212ABJ106KD-T TAIYO YUDEN UMK105CH101JV-F 74404300047 Wurth This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM2316 EVB User Guide 10. PCB Layout Guideline The following guidelines should be used to help ensure a proper layout: 1). The input capacitor should be close to IC as close as possible. 2). Must put a small decoupling capacitor between Vin Pin and AGND Pin. 3). Minimize the switching loop area to avoid excessive switching noise. 4). AGND and PGND should connect at input capacitor GND. 5). For the good thermal dissipation, PAM2316 has a heat dissipate pad in the bottom side, it should be soldered to PCB surface. For the copper area can’t be large in the component side, so we can use multiple vias connect to other side of the PCB. 11. PCB Layout Example Top Layer This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM2316 EVB User Guide Bottom Layer This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product.