BD9524MUV ROHM Electronics, BD9524MUV Datasheet
BD9524MUV
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BD9524MUV Summary of contents
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... Note PC(Linear Regulator Integrated) BD9524MUV ●Description BD9524MUV is a switching regulator controller with high output current which can achieve low output voltage (2.0V～5.5V) from a wide input voltage range (7V～25V). High efficiency for the switching regulator can be realized by utilizing an external N-MOSFET power transistor. A new technology called H transient response against load change ...
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... BD9524MUV ●Operating Conditions (Ta=25℃) Parameter Terminal voltage BOOT1-SW1, BOOT2-SW2, HG1-SW1, HG2-SW2 *This product should not be used in a radioactive environment. ●Electrical characteristics (unless otherwise noted, Ta=25℃ VIN=12V, CTL=5V, EN1=EN2=5V, REF1=2.5V, REF2=1.65V, FS1=FS2=0.582V) Parameter VIN standby current VIN bias current Shut down mode current ...
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... BD9524MUV ●Electrical characteristics - Continued (unless otherwise noted, Ta=25℃ VIN=12V, CTL=5V, EN1=EN2=5V, REF1=2.5V, REF2=1.65V, FS1=FS2=0.582V) Parameter Reg block] On Time 1 On Time 2 Maximum On Time Minimum Off Time FS1, FS2 bias current [FET driver block] HG higher side ON resistor HG lower side ON resistor ...
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... BD9524MUV ●Block Diagram, Application circuit FS2 11 FB2 10 REF2 REG2 8 5 PGOOD2 REG2 Is+2 9 EN2 4 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved REG1 CL2 Overlap SCP2 Protection Circuit MCTL2 MCTL1 Block Reg Controller FS2 FS1 Block ...
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... BD9524MUV ●Pin Configuration PGND1 LG1 EXTVCC REG2 REG1 VIN LG2 PGND2 ●Pin Function Table PIN No. PIN name 1 SW2 2 HG2 3 BOOT2 4 EN2 5 PGOOD2 6 SS2 7 DGND 8 REF2 9 Is+2 10 FB2 11 FS2 12 MCTL 13 AGND 14 FS1 15 FB1 16 Is+1 17 REF1 18 CTL 19 SS1 20 PGOOD1 21 EN1 22 BOOT1 23 HG1 24 SW1 ...
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... BD9524MUV ●Reference data EN 5V/div PGOOD 5V/div SS 1V/div Vo 2V/div Fig.1 wake up (Vo=5.0V) Vo 20mV/div I L 2A/div SW 5V/div LG 5V/div Fig.4 CONT Mode (Io=0A) Vo 20mV/div I L 2A/div SW 5V/div LG 5V/div Fig.7 QLLM (Io=0A) Vo 20mV/div I L 2A/div SW 5V/div LG 5V/div Fig.10 SLLM (Io=0A) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. ...
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... BD9524MUV ●Reference data 1.5 1.0 Vo=5.0V 0.5 Vo=3.3V 0.0 0.00 0.40 0.80 1.20 FS[V] Fig.13 FS-ON TIME 100 90 80 SLLM QLLM 30 CONT Mode 100 1000 Io [mA] Fig.16 Io-efficiency (VIN=12V, Vo1=5.0V) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved VIN=12V, Vo=5. CONT Mode (5.0V) CONT Mode (3 ...
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... Descriptions ・VIN This is the main power supply pin. The input supply voltage range 25V. The duty cycle of BD9524MUV is determined by input voltage and control output voltage. Therefore, when VIN voltage fluctuated, the output voltage also becomes unstable. Since VIN line is also the input voltage of switching regulator, stability depends on the impedance of the voltage supply recommended to establish bypass capacitor and CR filter suitable for the actual application. ・ ...
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... BD9524MUV ● Explanation of Operation The BD9524MUV is a 2ch synchronous buck regulator controller incorporating ROHM’s proprietary H control system. When VOUT drops due to a rapid load change, the system quickly restores VOUT by extending the TON time interval. Thus, it serves to improve the regulator’s transient response. Activating the Light Load Mode will also exercise Simple Light Load Mode (SLLM) control when the load is light, to further increase efficiency ...
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... BD9524MUV ● Timing Chart • Soft Start Function OUT I IN ・Timer Latch Type Short Circuit Protection REF×1.4 V OUT SCP EN / UVLO ・Over Voltage Protection 150μs(typ) 150μs(typ) or less or more REF×2.35 VOUT 150μs(typ) OVP EN / UVLO ・ ...
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... BD9524MUV ● External Component Selection 1. Inductor (L) selection Δ OUT L Co Output ripple current ※Passing a current larger than the inductor’s rated current will cause magnetic saturation in the inductor and decrease system efficiency. In selecting the inductor, be sure to allow enough margin to assure that peak current does not exceed the inductor rated current value. ※ ...
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... BD9524MUV 4. MOSFET Selection VIN main switch VOUT L Co synchronous switch 5. Setting Detection Resistance (Detect ILIMIT at the peak current) (A) High accuracy current detective circuit (use the low resistance) VIN OCP 65mV Current limit (B) Low loss current detective circuit (use the DCR value of inductor) ...
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... BD9524MUV 6. Setting standard voltage (REF) V REF 3 H Reg CONTROLLA Outside voltage REG2(3.3V) R1 REF H CONTROLLA Setting output voltage This IC is operated that output voltage is REF×2≒FB. And it is operated that output voltage is feed back to FB pin REF ...
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... BD9524MUV ●I/O Equivalent Circuit 1, 24pin (SW2, SW1) BOOT HG 4, 21pin (EN2, EN1) 8, 17pin (REF2, REF1) REG1 11, 14pin (FS2, FS1) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 2, 23pin (HG2, HG1) BOOT BOOT SW 5, 20pin (PGOOD2, PGOOD1) 9, 16pin (Is+2, Is+1) 12pin (MCTL) 14/20 Technical Note ...
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... BD9524MUV ●I/O Equivalent Circuit 26, 31pin (LG1, LG2) REG1 REG1 29pin (REG1) VIN ●Evaluation Board Circuit (Vo1=5V f1=300kHz Vo2=3.3V f2=400kHz) VIN BD9524MUV 12V R1 30 VIN VIN CTL C1 R2 CTL 18 CTL REG1 EN1 EN1 R3 21 EN1 REG1 EN2 EN2 R4 4 EN2 REG1 29 REG1 ...
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... Diode RSX501L-20 Diode RSX501L-20 Diode RB520S-30 Diode RB520S-30 CDEP105NP-2R5MC- 2.5uH Sumida 32 CDEP105NP-2R5MC- 2.5uH Sumida 32 FET uPA2702 FET uPA2702 FET uPA2702 FET uPA2702 - - - - - BD9524MUV 2009.04 - Rev.B ROHM - - - - - - - - - - - - - - - - - - - - ROHM ROHM ROHM ROHM NEC NEC NEC NEC - - ROHM ...
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... If using only 1ch DC/DC and 2ch pin is set to be off at all times, please manage the unused pin as diagram below. PIN No, PIN Name 1 SW2 2 HG2 3 BOOT2 4 EN2 5 PGOOD2 6 SS2 8 REF2 9 Is+2 10 FB2 11 FS2 31 LG2 VIN BD9524MUV 12V R1 30 VIN VIN CTL C1 R2 CTL 18 CTL REG1 EN1 EN1 R3 21 EN1 4 EN2 REG1 29 REG1 5V C2 REG2 3 ...
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... BD9524MUV ●Notes for use 1. This integrated circuit is a monolithic IC, which (as shown in the figure below), has P isolation in the P substrate and between the various pins. A P-N junction is formed from this P layer and N layer of each pin, with the type of junction depending on the relation between each potential, as follows: ...
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... BD9524MUV 7. Operation in strong electromagnetic fields Use in strong electromagnetic fields may cause malfunctions. Use extreme caution with electromagnetic fields. 8. Thermal shutdown circuit This IC is provided with a built-in thermal shutdown (TSD) circuit, which is activated when the operating temperature reaches 175℃ (standard value), and has a hysteresis range of 15℃ (standard). When the IC chip temperature rises to the threshold, all the inputs automatically turn OFF ...
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... BD9524MUV ●Ordering part number Part No. Part No. VQFN032V5050 5.0±0.1 1PIN MARK 0.08 S 3.4±0.1 C0 0.75 +0.05 0.5 0.25 -0.04 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved Package MUV : VQFN032V5050 <Tape and Reel information> Tape Embossed carrier tape Quantity 2500pcs E2 Direction ...
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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 purpose ...