MB39A214A
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MB39A214APFT-G-JNERE1 (pdf) |
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MB39A214A 2ch DC/DC Converter IC with PFM/PWM Synchronous Rectification MB39A214A is a N-ch/ N-ch synchronous rectification type 2ch Buck DC/DC converter IC equipped with a bottom detection comparator for low output voltage ripple. It supports low on-duty operation to allow stable output of low voltages when there is a large difference between input and output voltages. It also allows the high switching frequency setting, enabling the downsized peripheral circuits and low-cost configuration. MB39A214A realizes ultra-rapid response and high efficiency with built-in enhanced protection features. It is most suitable for the power supply for ASIC or FPGA core, input/output devices, or memory. efficiency setting by internal preset function 310 kHz, 620 kHz, 1 MHz accuracy reference voltage ± Ta = + 25°C Input voltage range 6 V to 28 V voltage setting range V to V to select the automatic PFM/PWM selection mode or PWM-fixed mode frequency limitation function Prohibit Audio Frequency > 30 kHz Min boost diode, external fly-back diode not required discharge FET over voltage protection function under voltage protection function over temperature protection function over current limitation function circuit without load dependence sense resistor not required synchronous rectification type output steps for N-ch MOS FET current 0 µA Typ Package TSSOP24 mm x mm x mm [Max] TV Photocopiers STB DVD players/recorders etc. • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 MB39A214A Contents Pin Assignment 3 Pin 4 Block Diagram 5 Absolute Maximum Ratings 6 Recommended Operating Conditions 7 Electrical Characteristics 8 Typical 11 14 I/O Pin Equivalent Circuit Diagram 23 Example Application Circuit 25 Part 26 Application 27 Setting Operating 27 Selecting 33 Reference Data 43 Usage 47 Ordering Information 48 EV Board Ordering Information 48 RoHS Compliance Information Of Lead Pb Free Version 48 Marking Format Lead Free 48 Labeling Sample Lead free 49 MB39A214APFT Recommended Conditions of Moisture Sensitivity Level 50 Package Dimensions 52 Major Changes 53 Document 54 Page 2 of 55 Pin Assignment TOP VIEW BST1 1 EN1 2 VOUT1 3 FB1 4 CS1 5 GND 6 FREQ 7 CS2 8 FB2 9 VOUT2 10 EN2 11 BST2 12 24 DRVH1 23 LX1 22 DRVL1 21 PGND 20 ILIM1 19 VCC 18 VB 17 MODE 16 ILIM2 15 DRVL2 14 LX2 13 DRVH2 FPT-24P-M09 MB39A214A Page 3 of 55 MB39A214A Pin Descriptions Pin No. 1 2 3 4 5 6 Pin Name BST1 EN1 VOUT1 FB1 CS1 GND FREQ VOUT2 BST2 DRVH2 DRVL2 ILIM2 MODE ILIM1 PGND DRVL1 DRVH1 I/O I CH1 boost capacitor connection pin. CH1 enable pin. CH1 input pin for DC/DC output voltage. CH1 input pin for feedback voltage. CH1 soft-start time setting capacitor connection pin. Ground pin. Frequency switching signal input pin. FREQ GND Short Switching frequency FREQ Open Switching frequency FREQ VB Short Switching frequency 310 kHz 620 kHz 1 MHz Ordering Information Part number MB39A214APFT 24-pin plastic TSSOP FPT-24P-M09 Package Remarks EV Board Ordering Information EV board number MB39A214A-EVB-01 TSSOP-24 Remarks RoHS Compliance Information Of Lead Pb Free Version The LSI products of Cypress with “E1” are compliant with RoHS Directive, and has observed the standard of lead, cadmium, mercury, Hexavalent chromium, polybrominated biphenyls PBB , and polybrominated diphenyl ethers PBDE . A product whose part number has trailing characters “E1” is RoHS compliant. Marking Format Lead Free Version 39A214A XXXX E1 XXX INDEX Lead-free version Page 48 of 55 Labeling Sample Lead free version MB39A214A Lead-free mark JEITA logo JEDEC logo The part number of a lead-free product has the trailing characters "E1". "ASSEMBLED IN CHINA" is printed on the label of a product assembled in China. Page 49 of 55 MB39A214A MB39A214APFT Recommended Conditions of Moisture Sensitivity Level [Cypress Recommended Mounting Conditions] Item Condition Mounting Method IR infrared reflow , warm air reflow Mounting times 2 times Before opening Please use it within two years after manufacture. Storage period From opening to the 2nd reflow When the storage period after opening was exceeded Less than 8 days Please process within 8 days after baking 125°C ±3°C, 24H+ Baking can be performed up to two times. Storage conditions 5°C to 30°C, 70% RH or less the lowest possible humidity [Mounting Conditions] IR Infrared Reflow 260°C 245°C Main heating 170 °C to 190 °C "M" rank 250°C Max a Temperature Increase gradient b Preliminary heating c Temperature Increase gradient d Peak temperature d' Main Heating |
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