BD9532EKN_08 ROHM [Rohm], BD9532EKN_08 Datasheet
BD9532EKN_08
Related parts for BD9532EKN_08
BD9532EKN_08 Summary of contents
Page 1
TECHNICAL NOTE High-performance Regulator IC Series for PCs Switching Regulators for DDR-SDRAM Cores BD9532EKN ●Description BD9532EKN is a switching regulator controller with high output current which can achieve low output voltage (0.7V to 2.0V) from a wide input voltage range ...
Page 2
Absolute Ratings (Ta=25℃) Parameter Input Voltage 1 Input Voltage 2 Input Voltage 3 BOOT Voltage BOOT-SW Voltage HG-SW Voltage LG Voltage REF Voltage Output Voltage ILIM/SCP/SS/FS/SLLM Voltage VREG Voltage EN Input Voltage Power Dissipation 1 Power Dissipation 2 Power ...
Page 3
CHARACTERISTICS (unless otherwise noted, Ta=25℃ Parameter [Whole Device] VCC Bias Current VIN Bias Current VCC Standby Current VIN Standby Current EN Low Voltage EN HighVoltage EN Bias Current VREG Voltage [Under Voltage Locked Out ] VCC threshold ...
Page 4
Data 600 590 580 570 560 550 - Ta( ℃ ) Fig Icc 4.30 4.25 Sweep up 4.20 4.15 4.10 Sweep down 4.05 4.00 - Ta( ℃ ...
Page 5
Data ILIM=0. ℃ ] Fig. current limit threshould 100 SLLM 80 60 Continuous mode 100 1000 10000 Io(mA) Fig.16 ...
Page 6
Data VOUT IL HG/LG Fig.25 SLLM (I =0A) OUT IL HG/LG/SW Fig.28 Continuous MODE (Io=0A) VIN HG/LG VOUT Fig.31 VIN change (5→19V) 1.82 1.81 Continuous mode 1.8 SLLM 1.79 1. 100 1000 Iout [mA] Fig. ...
Page 7
Diagram VREG Reference Block REF×0.7 SCP SS×0.7 SCP V OUT 7 REF OUT + 18 - UVLO TSD Thermal ILIM Protection SCP TSD 1 GND FS ●PHYSICAL DIMENSIONS ...
Page 8
Descriptions ・GND(1pin) This is the ground pin for IC internal circuits equivalent to FIN voltage. ・VCC(2pin) This is the power supply pin for IC internal circuits, except the FET driver. The maximum circuit current is 900uA. The ...
Page 9
Operation The BD9532EKN is a synchronous buck regulator controller incorporating ROHM’s proprietary H system. When V drops due to a rapid load change, the system quickly restores V OUT Thus, it serves to improve the regulator’s transient response. ...
Page 10
Chart • Soft Start Function OUT IIN ・Timer Latch Type Short Circuit Protection REF×0.7 V OUT T SCP SCP EN/UVLO ・Over current protection circuit LIMIT I L ...
Page 11
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. ...
Page 12
MOSFET Selection V IN main switch V OUT L Co synchronous switch 5. Setting Detection Resistance Current limit OUT Current ...
Page 13
VIN=5V 7V 2500 12V 16V 2000 19V 1500 1000 500 100 RFS [kΩ] 1200 1000 800 600 400 200 100 Resistance [kΩ] 7. Setting standard voltage (REF) V REF 3 H ...
Page 14
Setting output voltage This IC is operated that output voltage is REF≒VOUT. And it is operated that output voltage is feed back to FB pin in case the output voltage is 0.7V to 2.0V REF ...
Page 15
Equivalent Circuit 3pin (ILIM 6pin (SLLM 9pin (Is 14pin(HG) BOOT BOOT 17pin (FS 20pin (REF 4pin (EN) 7pin (SCP 11pin (LG 15pin (BOOT) ...
Page 16
Board Circuit (Frequency=300kHz application circuit in Continuous mode/SLLM) 4.5V ～ 25V VIN 5V VCC VCC EN R18 SLLM R19 VREG 2.5V ILIM 0.5V REF 1.8V R1 Part Value Company No U1 ROHM BD9532EKN Q1 ROHM RSS100N03 Q2 ROHM RSS100N03 ...
Page 17
Board Circuit (Frequency=300kHz application circuit for detecting DCR current in Continuous mode/SLLM) 4.5V ～ 25V VIN 5V VCC VCC EN R18 SLLM R19 VREG ILIM REF R1 GND ●Evaluation Board Parts List Part Value Company No U1 ROHM BD9532EKN ...
Page 18
Notes 1. Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit ...
Page 19
Resistor Pin substrate GND Parasitic element 12. Ground Wiring Pattern When using both small signal and large current GND patterns recommended to isolate the two ground patterns, placing ...
Page 20
Type Designations (Selections) for Ordering Product name Package type ・EKN : HQFN20V ・ BD9532 HQFN20V <Dimension> (2.1) 4.2 ± 0.1 4.0 ± 0.1 0.5 (1. 0.22 ± 0.05 ...
Page 21
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 ...