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BD9122GUL Datasheet(PDF) 10 Page - Rohm |
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BD9122GUL Datasheet(HTML) 10 Page - Rohm |
10 / 19 page www.rohm.com TSZ02201-0J3J0AJ00110-1-2 © ROHM Co., Ltd. All rights reserved. 10/17 02.MAR.2012 Rev.001 TSZ22111・15・001 0J3J0AJ00110 Datasheet Information on Advantages Advantage 1:Offers fast transient response with current mode control system. Fig.24 Comparison of transient response Advantage 2: Offers high efficiency for all load range. ・For lighter load: Utilizes the current mode control mode called SLLM for lighter load, which reduces various dissipation such as switching dissipation (PSW), gate charge/discharge dissipation, ESR dissipation of output capacitor (PESR) and on-resistance dissipation (PRON) that may otherwise cause degradation in efficiency for lighter load. Achieves efficiency improvement for lighter load. ・For heavier load: Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs incorporated as power transistor. ON resistance of P- channel MOS FET : 0.3Ω(Typ.) ON resistance of N- channel MOS FET : 0.2Ω(Typ.) Fig.25 Efficiency Achieves efficiency improvement for heavier load. Offers high efficiency for all load range with the improvements mentioned above. Advantage 3:・Supplied in smaller package due to small-sized power MOS FET incorporated. Reduces a mounting area required. Fig.26 Example application ・ Output capacitor Co required for current mode control: 10μF ceramic capacitor ・ Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor 0.001 0.01 0.1 1 0 50 100 ① ② PWM SLLM TM ①inprovement by SLLM system ②improvement by synchronous rectifier Output current Io[A] BD9122GUL(transient response IO=50mA⇔125mA) VOUT IOUT VCC=3.3V Ta=25℃ 【VOUT=1.8V】 VOUT IOUT VCC=3.3V Ta=25℃ 【VOUT=1.8V】 Io=50→125mA Io=125→50mA DC/DC Convertor Controller RITH L Co VOUT CITH VCC Cin 8mm 8mm RITH CITH CIN CO L CVCC |
Similar Part No. - BD9122GUL_12 |
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Similar Description - BD9122GUL_12 |
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