User Guide for DIODES models including: PAM2319-EVB, PAM2319 WDFN EV Board, PAM2319, WDFN EV Board, EV Board, Board
5 days ago — Other key features include under-voltage lockout, soft-start, short circuit protection and thermal shutdown. Page 2. PAM2319. EVB User Guide. This application ...
Apr 20, 2024 — The PAM2319 is a dual step-down current-mode, DC-DC converter. At heavy load, the constant frequency. PWM control performs excellent stability and transient ...
PAM2319 EVB User Guide PAM2319 WDFN EV Board User Guide AE Department 1. Revision Information Date 2011/08 Revision V1.0 Description Initial Release Comment 2. PAM2319 General Description The PAM2319 is a dual step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2319 provides a power - saving Pulse-Skipping Modulation (PSM) mode to reduce quiescent current under light load operation. The PAM2319 supports a range of input voltages from 2.5V to 5.5V, allowing the use of a single Li+/Lipolymer cell, multiple Alkaline/NiMH cell, USB, and other standard power sources. The dual output voltages are adjustable from 0.6V to 3.3V .Both channels employ internal power switch and synchronous rectifier for to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 0.1 A. Other key features include under-voltage lockout, soft-start, short circuit protection and thermal shutdown. 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. 3. Key Features z Supply Voltage:2.5V to 5.5V z Output Voltage: VO1 ADJ/1000mA (ADJ: 0.6V to 3.3V) VO2 ADJ/2000mA (ADJ: 0.6V to 3.3V) z Low Quiescent Current: 40uA Per-channel z High Efficiency: z 3MHz Switching Frequency 4. EV Board Schematic PAM2319 EVB User Guide z Internal Synchronous Rectifier z Soft Start z Under-Voltage Lockout z Short Circuit Protection z Thermal Shutdown z Small WDFN3X3-12L Pb-Free/Halogen Free Package z RoHS/REACH Compliant 5. EVB PAM2310 EB09AA Description PAM2319 EB18AA is an evaluation board for the PAM2319 WDFN, a DC/DC converter. The board is targeted to be used in providing a simple and convenient evaluation environment for the PAM2319. 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. PAM2319 EVB User Guide 6. EV Board View GND VIN Top View This capacitors is C7_1 GND2 VOUT2 VOUT1 GND1 7. External Compnents Selection Input & output Capacitors (C1, C4, C5; C2, C7) (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 (C3C6) (1) Lower the output ripple (2) Low leakage current needed, 100pF, COH/CH ceramic recommend Output Voltage programmer resistors (R1, R2; R3,R4) (1) For programmer output voltage (2) For accurate output voltage, 1% tolerance is required. Inductor (L1;L2) (1) Low DCR for good efficiency (2) Inductance saturate current must higher than the output current 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. PAM2319 EVB User Guide 8. Evaluation Board BOM List: Item C4 C1, C5 C2, C7 C3, C6 L1 L2 R1 R2 R3 R4 IC1 PCB Value 10µF 1µF 10µF 100pF 1µH Type X5R/X7R, Ceramic/0805 X5R/X7R, Ceramic/0603 X5R/X7R, Ceramic/0805 COH/CH, Ceramic/0402 Rating 10V 25V 10V 50V >1.5A Description Input coupling CAP Input coupling CAP Output CAP Feed forward CAP Inductor 0.47µH >3A 300K 150K 150K 150K 0603 1% 0603 1% 0603 1% 0603 1% PAM2319 WDFN3X312L PAM2319 EB18AA Inductor Voltage set RES Vender and Part No. TAIYO YUDEN EMK212ABJ106KD-T TAIYO YUDEN TMK107 BJ105KA-T TAIYO YUDEN EMK212ABJ106KD-T TAIYO YUDEN UMK105CH101JV-F 744042001 Wurth 74404300047 Wurth 9. 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). Minimize the switching loop area to avoid excessive switching noise. 3). Two parts GND should be separately layout to avoid disturbing by each other. 4). Must put a small decoupling capacitor between Vin2 Pin and AGND2 Pin. 5). Vo2 output capacitor should be close to output connector to minimize PCB trace resistance affect on ripple voltage. Recommend use two output capacitor, one close to inductor and IC, another close to output connector. 6). PGND1 Pin should not directly connect to the thermal pad (PGND), it should connect to input capacitor GND then to other GND. 7). AGND should connect to PGND at input capacitor GND. 8). 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. 9). Avoid using vias in the high-current paths. If vias are unavoidable, use multiple vias in parallel to reduce resistance and inductance. 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. 10. PCB Layout Example PAM2319 EVB User Guide 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. PAM2319 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.Acrobat Distiller 8.1.0 (Windows)