bd9134muv ROHM Co. Ltd., bd9134muv Datasheet
bd9134muv
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bd9134muv Summary of contents
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... BD9134MUV ●Description ROHM’s high efficiency step-down switching regulator BD9134MUV is a power supply designed to produce 3.3volts from 5volts 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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... CC Protect CLK Driver OSC Logic PV CC PGND GND C ITH Fig.2 BD9134MUV Block Diagram Pin Function name GND Ground VOUT Output voltage detect pin GmAmp output pin/Connected phase ITH compensation capacitor N.C. Non Connection N.C. Non Connection N.C. Non Connection EN Enable pin(High Active） ...
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... OUT 3.0 2.0 1.0 Ta=25℃ Io=3A 0 INPUT VOLTAGE:V [V] CC Fig.3 Vcc - V OUT 3.35 【V =3.3V】 OUT 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 VCC=5V Io=0A 3.26 3.25 -40 - 100 TEMPERATURE:Ta[℃] Fig OUT 150 125 100 High side 75 50 Low side 25 VCC=5V 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 4/15 BD9134MUV (Load response I =1A→3A and on-resistance ESR 100 SLLM 50 ① PWM ①inprovement by SLLM system ②improvement by synchronous rectifier 0 ...
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... BD9134MUV 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 more. The output thus held tuned OFF may be ...
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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,(BD9134MUV) L =1.87μ → 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 10/15 ) [A]・・・(5) I OUT 2 3A, (BD9134MUV) ] 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 (BD9134MUV) 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 ・VOUT pin VOUT PV CC ・BST pin BST ・SW pin SW ・ITH pin ITH Fig.34 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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Appendix 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 ...