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| 型号： | BD9141MUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 10/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 20VQFN |
| 产品培训模块： | High Efficiency Current Mode Switching Regulators CMOS LDO Regulators |
| 特色产品： | BD91x Series Step-Down Regulators |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 6 V |
| 输入电压： | 4.5 V ~ 13.2 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | VQFN020V4040 |
| 产品目录页面： | 1373 (CN2011-ZH PDF) |
| 其它名称： | BD9141MUV-E2DKR |
BD9141MUV
● Information on Advantages
Advantage 1 ： Offers fast transient response with current mode control system.
Datasheet
Conventional product (Load response I O =0.5A → 1A)
V OUT
110mV
I OUT
V OUT
I OUT
BD9141MUV (Load response I O =0.5A → 1A)
50mV
Voltage drop due to sudden change in load was reduced by about 50%.
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 (P SW ), gate charge/discharge dissipation, ESR dissipation of output capacitor (P ESR ) and on-resistance
dissipation (P RON ) 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 : 150m Ω (Typ.)
ON resistance of N-channel MOS FET : 80m Ω (Typ.)
100
SLLM
②
PWM
50
①
① improvement by SLLM system
Achieves efficiency improvement for heavier load.
Offers high efficiency for all load range with the improvements mentioned above.
② improvement by synchronous rectifier
0
0.001 0.01 0.1
Output current Io[A]
Fig.25 Efficiency
1
Advantage 3 ：? Supplied in smaller package due to small-sized power MOS FET incorporated.
? Output capacitor Co required for current mode control: 22μF ceramic capacitor
? Inductance L required for the operating frequency of 500kHz: 2.2μH inductor
Reduces a mounting area required.
V CC
Cin
(BD9141MUV:Co=22μF, L=4.7μH)
15mm
R ITH
DC/DC
Convertor
Controller
L
V OUT
Co
10mm
R ITH
C ITH
C IN
C O
L
C ITH
Fig.26 Example application
www.rohm.com
?2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
10/19
TSZ02201-0J3J0AJ00180-1-2
02.MAR.2012 Rev.001
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