参数资料
| 型号： | BD9137MUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 10/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 20VQFN |
| 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： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 4A |
| 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： | 20-VQFN |
| 其它名称： | BD9137MUV-E2DKR |
BD9137MUV
● Information on Advantages
Advantage 1 ： Offers fast transient response with current mode control system.
Datasheet
Conventional product (Load response I O =1A → 3A)
BD9137MUV (Load response I O =1A → 3A)
V OUT
I OUT
145mV
V OUT
I OUT
72mV
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 Highside MOS FET : 82m Ω (Typ.)
ON resistance of Lowside MOS FET : 70m Ω (Typ.)
100
SLLM
②
PWM
50
①
① inprovement by SLLM system
Achieves efficiency improvement for heavier load.
② improvement by synchronous rectifier
0
0.001 0.01 0.1
Output current Io[A]
1
Offers high efficiency for all load range with the improvements mentioned above.
Advantage 3 ：? Supplied in smaller package due to small-sized power MOS FET incorporated.
Fig.25 Efficiency
? Output capacitor Co required for current mode control: 22μF ceramic capacitor
? Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor
? Incorporates FET + Boot strap diode
EN
Reduces a mounting area required.
V CC
VREF
VCC
BST
20mm
+
R Q
+
SCP
PWM
Gm Amp
Soft
Start
ADJ
Current
Comp
S
SLOPE CLK
OSC
VCC
UVLO
TSD
ITH
Current
Sense/
Protect
+
Driver
Logic
SLLM
select
PVCC
PVCC
SW
PGND
GND
3.3V
Input
Output
15mm
R 2
R 1
R ITH
C ITH
C f
Rf
C BST
C IN
Co
L
R ITH C ITH
R1 R2
Fig.26 Example application
www.rohm.com
?2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
10/19
TSZ02201-0J3J0AJ00160-1-2
02.MAR.2012 Rev.001
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