參數(shù)資料
型號(hào): BD9153MUV-E2
廠商: Rohm Semiconductor
文件頁(yè)數(shù): 13/21頁(yè)
文件大?。?/td> 630K
描述: IC REG TRPL BCK/LINEAR 24VQFN
特色產(chǎn)品: CMOS LDO Regulators
標(biāo)準(zhǔn)包裝: 1
拓?fù)洌?/td> 降壓(降壓)同步(2),線(xiàn)性(LDO)(1)
功能: 任何功能
輸出數(shù): 3
頻率 - 開(kāi)關(guān): 1MHz
電壓/電流 - 輸出 1: 1.8 V ~ 3.3 V,1.5A
電壓/電流 - 輸出 2: 0.8 V ~ 2.5 V,1.5A
電壓/電流 - 輸出 3: 控制器
帶 LED 驅(qū)動(dòng)器: 無(wú)
帶監(jiān)控器: 無(wú)
帶序列發(fā)生器: 無(wú)
電源電壓: 4.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 24-VFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 24-VQFN
包裝: 標(biāo)準(zhǔn)包裝
其它名稱(chēng): BD9153MUV-E2DKR
Technical Note
 
13/18 
www.rohm.com
2009.08 - Rev.A
?2009 ROHM Co., Ltd. All rights reserved.
BD9153MUV 
3. Selection of input capacitor (Cin)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
A low ESR 22礔/10V ceramic capacitor is recommended to reduce ESR dissipation of input capacitor for better efficiency.
 
 
4. Determination of RITH, CITH that works as a phase compensator
As the Current Mode Control is designed to limit a inductor current, a pole (phase lag) appears in the low frequency area
due to a CR filter consisting of a output capacitor and a load resistance, while a zero (phase lead) appears in the high
frequency area due to the output capacitor and its ESR. So, the phases are easily compensated by adding a zero to the
power amplifier output with C and R as described below to cancel a pole at the power amplifier.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Input capacitor to select must be a low ESR capacitor of the capacitance
sufficient to cope with high ripple current to prevent high transient voltage. The
ripple current IRMS is given by the equation (5):
IRMS=IOUT?
VOUTVCC-VOUT
VCC
A?

When Vcc=2譜OUT, IRMS =
IOUT
2
< Worst case > IRMS(max.)
IRMS=2?
1.85.0-1.8
5.0
= 0.48[ARMS]

Gain
[dB]
Phase
[deg]
Fig.38 Open loop gain characteristics
0
0
-90
0
0
-90
fz(Amp.)
Fig.39 Error amp phase compensationcharacteristics
fp=
2雷R(shí)OO
1
fz(ESR)=
2雷ESRO
1
Pole at power amplifier
When the output current decreases, the load resistance Ro
increases and the pole frequency lowers.
fp(Min.)=
2雷R(shí)OMax.O
1
[Hz]恮ith lighter load
fp(Max.)=
2雷R(shí)OMin.O
1
[Hz] 恮ith heavier load
Zero at power amplifier
fz(Amp.)=
2雷R(shí)ITHITH
1
Fig.37 Input capacitor
fp(Min.)
fp(Max.)
fz(ESR)
IOUTMin.
IOUTMax.
Gain
[dB]
Phase
[deg]
VOUT
VCC
L
Co
Cin
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.)
If VCC=5.0V, VOUT=1.8V, and IOUTmax.=1.5A, (BD9153MUV)
相關(guān)PDF資料
PDF描述
CAT2300VP2-GT3 IC SENSE FET CONTROLLER 8TDFN
CAT34TS02VP2GT4A IC TEMP SENSOR 2K MEMORY 8TDFN
CAT6095VP2-GT4 IC TEMP SENSOR STAND ALONE 8TDFN
DS1621S+ IC THERMOMETER/STAT DIG 8-SOIC
DS1624S+T&R IC THERM/EEPROM DIG 256BYT 8SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BD9160FVM 制造商:ROHM 制造商全稱(chēng):Rohm 功能描述:1ch DC/DC Converter Controller IC with Built-in Synchronous Rectifier
BD9160FVM-TR 制造商:ROHM Semiconductor 功能描述:Cut Tape
BD9161FVM 制造商:ROHM 制造商全稱(chēng):Rohm 功能描述:Output 1.5A or Less High-efficiency Step-down Switching Regulator with Built-in Power MOSFET
BD9161FVM_12 制造商:ROHM 制造商全稱(chēng):Rohm 功能描述:2.5V to 4.5V, 0.6A 1ch Synchronous Buck Converter Integrated FET
BD9161FVM-LBTR 功能描述:Buck Switching Regulator IC Positive Adjustable 1V 1 Output 600mA 8-VSSOP, 8-MSOP (0.110", 2.80mm Width) 制造商:rohm semiconductor 系列:- 包裝:剪切帶(CT) 零件狀態(tài):有效 功能:降壓 輸出配置:正 拓?fù)?降壓 輸出類(lèi)型:可調(diào)式 輸出數(shù):1 電壓 - 輸入(最小值):2.5V 電壓 - 輸入(最大值):4.5V 電壓 - 輸出(最小值/固定):1V 電壓 - 輸出(最大值):3.3V 電流 - 輸出:600mA 頻率 - 開(kāi)關(guān):1MHz 同步整流器:是 工作溫度:-25°C ~ 85°C(TA) 安裝類(lèi)型:表面貼裝 封裝/外殼:8-VSSOP,8-MSOP(0.110",2.80mm 寬) 供應(yīng)商器件封裝:8-MSOP 標(biāo)準(zhǔn)包裝:1