BH6559FV Optical discs DC/DC converter for CD/DVD-ROM slim BH6559FV BH6559FV is an IC that incorporates 1 channel variable DC/DC converter and reset function. Variable DC/DC converter can set high-precision voltage (±2% precision) by trimming reference voltage. !Applications CD/DCD-ROM slim !External dimensions (Units : mm) 5.0 ± 0.2 16 9 1 8 0.3Min. 1.15 ± 0.1 6.4 ± 0.3 0.1 4.4 ± 0.2 !Features 1) Low current consumption by adopting synchronous rectifier type. 2) Few external components reduced by the built-in power MOS transistor. 3) Adjustable by external resistor of DC/DC converter output. 4) Built-in reset for supply voltage and ATAPI (output pin is common). 5) Built-in delay time setting function for supply voltage reset. 0.65 0.15 ± 0.1 0.1 0.22 ± 0.1 SSOP-B16 !Absolute maximum ratings (Ta=25°C) Symbol Limits Unit Supply voltage 1 (PRE block) PREVCC1 7 V Supply voltage 2 (PRE block) PREVCC2 7 V Supply voltage POWVCC 7 Iswomax 1 Parameter (PRE block) Pin output current (DSW block) Power dissipation Pd V ∗1 A 0.56 ∗2 W Operating temperature range Topr −30 to +85 C Storage temperature range Tstg −55 to +150 C + ∗1 Intermittent current at maximum applied time of 5msec,1/10 duty (Max.) ∗2 Derating : 4.5mv/ C for operation above Ta=25 C. On less than 3% (percentage occupied by copper foil), 70mm 70mm, t=1.6mm, glass epoxy mounting. 1/3 BH6559FV Optical discs !Recommended Operating Conditions (Ta=25°C) Symbol Min. Typ. Max. Unit Supply voltage 1 (PRE block) Parameter PREVCC1 4.5 5.0 5.5 V Supply voltage 2 (PRE block) PREVCC2 4.5 5.0 5.5 V Supply voltage POWVCC 4.5 5.0 5.5 V Ta −10 25 70 C Io − 300 500 mA VDD 1.7 − VCC−1 V (Pow block) Ambient temperature Vatiable DC/DC converter output current ∗ Vatiable DC/DC converter output voltage ∗ When L=47µH, C=47µF is used !Electrical characteristics (Ta=25°C, PREVCC1/2=5V, POWVCC=5V) Parameter Current consumption at no signal < Varible DC/DC converter > EI pin threshold voltage Symbol Min. Typ. ICC − 1.2 24 Max. Unit mA Conditions No load VEITH 0.980 1.00 1.020 V DSW pin ON resistance H RDSWONH − 0.42 0.87 Ω IL=500mA DSW pin ON resistance L RDSWONL − 0.30 0.60 Ω IL=-500mA fDSW 210 310 410 kHz Vcc reset ON voltage VRSTON 3.52 3.70 3.88 V Vcc reset hysteresis width VRSTHYS 50 80 110 mV DSW pin oscollation frequency < Reset block > VRSTT 30 50 70 msec ATAPI reset ON voltage VATPON 1.25 1.40 1.55 V ATAPI reset hysteresis width VATPHYS 40 60 90 mV Vcc reset delay time OSC_R=22kΩ sweep down RESET τ=0.1µF sweep down ∗ This product is not designed for protection against redioactive rays. 2/3 BH6559FV Optical discs !Application Circuit PREGND2 POWGND 13 12 11 PREGND1 PREGND2 POWGND PREGND1 R 16 14 15 10 9 POWVcc SOFT SAW OSC or PRE DRIVE POWGND BH6559FV RESET ATAPI IN τ RESET IN SAW OSC SOFT PREVcc1 2 10KΩ 3 4 PREVcc1 ATP_IN VccMON VDD 5 1000pF 10KΩ 1 6 PREVcc2 POWVcc 7 8 PREVcc2 100KΩ POWVcc 1000pF 62KΩ 47µH 47µF 27KΩ 3/3 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0