bd9137muv ROHM Co. Ltd., bd9137muv Datasheet
bd9137muv
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bd9137muv Summary of contents
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... BD9137MUV ●Description ROHM’s high efficiency step-down switching regulator BD9137MUV is a power supply designed to produce a low voltage including 0.8 volts from 5.5/3.3 volts power supply line. Offers high efficiency with our original pulse skip control technology and synchronous rectifier. Employs a current mode control system to provide faster transient response to sudden change in load. ● ...
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... CLK Driver OSC Logic PV CC PGND GND SLLM select PWM C ITH Fig.2 BD9137MUV Block Diagram Pin Function name GND Ground ADJ Output voltage detect pin GmAmp output pin/Connected phase ITH compensation capacitor PWM Select SLLM / PWM (H:PWM mode , L:SLLM & PWM mode) TP ...
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... OUT 1.6 1.2 0.8 0.4 Ta=25℃ Io=3A 0 INPUT VOLTAGE:V [V] CC Fig.3 Vcc - V OUT 1.22 =1.2V】 【V OUT 1.21 1.20 1.19 VCC=5V Io=0A 1.18 -40 - 100 TEMPERATURE:Ta[℃] Fig OUT 150 125 100 High side 75 50 Low side 25 VCC=3.3V 0 -40 - ...
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... L required for the operating frequency of 1 MHz: 2.2μH inductor ・Incorporates FET + Boot strap diode VCC BST 3.3V Input PVCC Output SW PGND GND Fig.20 Example application 4/16 BD9137MUV (Load response I =1A→3A and on-resistance dissipation ESR 100 SLLM 50 ① PWM ①inprovement by SLLM system ②improvement by synchronous rectifier 0 ...
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... BD9137MUV is a synchronous rectifying step-down switching regulator that achieves faster transient response by employing current mode PWM control system. It utilizes switching operation in PWM (Pulse Width Modulation) mode for heavier load, while it utilizes SLLM (Simple Light Load Mode) operation for lighter load to improve efficiency. ...
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EN terminal shifted to “High” activates a soft-starter to gradually establish the output voltage with the current limited during startup, by which it is possible to prevent an overshoot of output voltage and an inrush ...
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Turns OFF the output to protect the IC from breakdown when the incorporated current limiter is activated continuously for the fixed time(Hiccup delay) or more. The IC returns to normal operation after Cool ...
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As this IC functions with high efficiency without significant heat generation in most applications, no special consideration is needed on permissible dissipation or heat generation. In case of extreme conditions, however, including lower ...
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... (ΔI : Output ripple current, and f: Switching frequency) L =0.2×3A=0.6A, for example,(BD9137MUV) L =2.08μ → 2.2[μH] ) Output capacitor should be selected with the consideration on the stability region and the equivalent series resistance required to smooth ripple voltage. Output ripple voltage is determined by the equation (4)： ...
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... Increasing capacitance of the output capacitor lowers the pole frequency while the zero frequency does not change. (This is because when the capacitance is doubled, the capacitor ESR reduces to half.) fz 10/16 ) [A]・・・(5) I OUT 2 3A, (BD9137MUV) OUTmax.= ] RMS O 1 × [Hz]←with lighter load (Min.) 2π ...
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Cin ADJ OUT ITH GND,PGND R ITH C ITH Fig.32 Typical application Stable feedback loop may be achieved by canceling the pole fp (Min.) produced by the output capacitor and the load resistance with ...
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... Lay out CITH and RITH between the pins ITH and GND as neat as possible with least necessary wiring. ※ VQFN020V4040 (BD9137MUV) has thermal PAD on the reverse of the package. The package thermal performance may be enhanced by bonding the PAD to GND plane which take a large area of PCB. ● ...
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... EN ・ADJ pin ADJ PV ・BST pin CC BST PV ・SW pin SW ・ITH pin ITH Fig.36 I/O equivalence circuit 13/ ...
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Absolute Maximum Ratings While utmost care is taken to quality control of this product, any application that may exceed some of the absolute maximum ratings including the voltage applied and the operating temperature range may result ...
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Ground wiring pattern If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB ...
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Catalog No.08T864A '08.12 ROHM © ...
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Appendix No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM CO.,LTD. The content specified herein is subject to change for improvement without notice. The content specified herein is for the ...