mps_mp1471规格书

1、 MP1471 High-Efficiency, 3A Peak, 16V, 500kHz Synchronous, Step-Down Converter In a 6-Pin TSOT 23 MP1471 Rev. 1.01 www.MonolithicP 1 8/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. The Future of Analog IC Technology DESCRIPTION The MP1471 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 3A peak output c

2、urrent over a wide input supply range, with excellent load and line regulation. The MP1471 has synchronous-mode operation for higher efficiency over the output current-load range. Current-mode operation provides fast transient response and eases loop stabilization. Protection features include over-current protection and thermal shutdown. The MP1471 requires a minimal number of readily-available, standard, external components and is available in a space-saving 6-pin TSOT23 package. FEATURES Wide

3、4.7V-to-16V Operating Input Range 150m/70m Low-RDS(ON) Internal Power MOSFETs Proprietary Switching-LossReduction Technology High-Efficiency Synchronous-Mode Operation Fixed 500kHz Switching Frequency Internal AAM Power-Save Mode for High Efficiency at Light Load Internal Soft-Start Over-Current Protection and Hiccup Thermal Shutdown Output Adjustable from 0.8V Available in a 6-pin TSOT-23 package APPLICATIONS Game Consoles Digital Set-Top Boxes Flat-Panel Television and Monitors General Purpose

4、s All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION VIN R2 13k R1 40.2k R3 40.2k IN U1 GND MP1471 1 4 VOUT 2 63 5 ENFB SW BST 3.3V EN GND 50 55 60 65 70 75 80 85 90 95 100 0.010.1110 MP1471 SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS MP1471 Rev. 1.01 www.Monolith

5、icP 2 8/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. ORDERING INFORMATION Part Number* Package Top Marking MP1471GJ TSOT23-6 AEJ * For Tape PACKAGE REFERENCE MP1471 GND SW IN 1 2 3 6 5 4 BST EN FB TOP VIEW ABSOLUTE MAXIMUM RATINGS (1) VIN -0.3V to 17V VSW -0.3V (-5V for 65% Connect the external BST diode from the output of voltage regulator to the BST pin, as shown in Figure 7. Figure 7 : Optional Externa

6、l Bootstrap Diode For most applications, use an IN4148 for the external BST diode is IN4148, and a 1F capacitor for the BST capacitor. PC Board Layout PCB layout is very important to achieve stable operation. For best results, use the following guidelines and Figure 8 as reference. 1) Keep the connection between the input ground and GND pin as short and wide as possible. 2) Keep the connection between the input capacitor and IN pin as short and wide as possible. 3) Use short and direct feedback

7、connections. Place the feedback resistors and compensation components as close to the chip as possible. 4) Route SW away from sensitive analog areas such as FB. C1 C6 R1 R2 R7 R6C5 R4 C3 R5 123 456 VIN GND C3 R3 C1 C1A C6 R8 R1 R2 R7 C7 R3 C3 R6C5 R4 C4 R5 1 23 456 VIN GND Figure 8: Sample Layout MP1471 SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS MP1471 Rev. 1.01 www.MonolithicP 14 8/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibit

8、ed. 2013 MPS. All Rights Reserved. Design Example Below is a design example following the application guidelines for the specifications: Table 2Design Example VIN 12V VOUT 3.3V Io 2.5A The detailed application schematic is shown in Figure 9. The typical performance and circuit waveforms have been shown in the Typical Performance Characteristics section. For more device applications, please refer to the related Evaluation Board Datasheets. MP1471 SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOS

9、FETS MP1471 Rev. 1.01 www.MonolithicP 15 8/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. TYPICAL APPLICATION CIRCUITS C1 25V GND GND GND GND GND GND GND EN VOUT VIN 100k R5 NS R6 0 R4 C4 C2AC2 NS C3 L1 SW NS R3 40.2K R1 7.68K R2 GND GNDGND GND 24.9K R7 5V NS C5 25V C6 MP1471 3 5 6 2 4 BST SW IN GND FBEN 1 Figure 9: 12VIN, 5V/2.5A C1 25V GND GND GND GND GND GND GND EN VOUT VIN 100k R5 NS R6 0 R4 C4 C2AC2 NS C3 L1 SW NS R3 40.2K R1 13K R2 GND GNDGND GND 40.2K R7 3.3V NS C5 25V C6 MP1471 3 5 6 2 4 BST SW IN GND FBEN 1 Figure 10: 12VIN, 3.3V/3A C1 25V GND GND GND GND GND GND GND EN VOUT VIN 100k R5 NS R6 0 R4 C4 C2AC2 NS C3 L1 SW NS R3 40.2K R1 19.1K R2 GND GNDGND GND 59K R7 2.5V NS C5 25V C6 MP1471 3 5 6 2 4 BST SW IN GND FBEN 1 Figure 81: 12VIN, 2.5V/3A MP1471 SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSF

《mps_mp1471规格书》由会员小**分享，可在线阅读，更多相关《mps_mp1471规格书》请在金锄头文库上搜索。