- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄225136 > S-8520E47MC-BKG-T2 0.05 A SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO5 PDF資料下載
參數(shù)資料
| 型號： | S-8520E47MC-BKG-T2 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.05 A SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 16/43頁 |
| 文件大?。?/td> | 499K |
| 代理商： | S-8520E47MC-BKG-T2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁
PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-DOWN SWITCHING REGULATOR
Rev.7.4_20
S-8520/8521 Series
Seiko Instruments Inc.
23
On the other hand, a reactive current flows through RA and RB. This reactive current must be reduced to a
negligible value with respect to the load current in the actual use of the IC so that the efficiency
characteristics will not be degraded. This requires that the value of RA and RB be made sufficiently large.
However, too large a value (more than 1 M
) for the RA and RB would make the IC vulnerable to external
noise. Check the influence of this value on actual equipment.
There is a tradeoff between the voltage accuracy of the OUT and the reactive current. This should be
taken into consideration based on the requirements of the intended application.
Deviations in the absolute value of the internal resistances (R1 and R2) in the IC vary with the output
voltage of the S-8520/8521 Series, and are broadly classified as follows:
Table 10
Output voltage
Deviations in the absolute value of R1 and R2 in the IC
1.5 V to 2.0 V
5.16 M
to 28.9 M
2.1 V to 2.5 V
4.44 M
to 27.0 M
2.6 V to 3.3 V
3.60 M
to 23.3 M
3.4 V to 4.9 V
2.44 M
to 19.5 M
5.0 V to 6.0 V
2.45 M
to 15.6 M
When a value of R1
+R2 given by the equation indicated below is taken in calculating the voltage value of
the output OUT, a median voltage deviation will be obtained for the OUT.
R1
+R2=2÷(1÷maximum deviation in absolute value of R1 and R2+1÷minimum deviation in absolute value
of R1 and R2)
Moreover, add a capacitor (CC) in parallel to the external resistance (RA) in order to avoid output
oscillations and other types of instability. (Refer to Figure 14.)
Make sure that CC is larger than the value given by the following equation:
CC (F)
≥1÷(2×π×RA ()×7.5 kHz)
If a large CC value is selected, a longer soft start time than the one set up in the IC will be set.
SII is equipped with a tool that allows you to automatically calculate the necessary resistance values of
RA and RB from the required voltage accuracy of the OUT. SII will be pleased to assist its customers in
determining the RA and RB values. Should such assistance be desired, please inquire.
Moreover, SII also has ample information on which peripheral components are suitable for use with this
IC and data concerning the deviations in the IC's characteristics. We are ready to help our customers
with the design of application circuits. Please contact the SII Components Sales Dept.
*1.
// shows the combined resistance in parallel.
Caution The above connection diagram and constant will not guarantees successful operation.
Perform through evaluation using the actual application to set the constant.
相關PDF資料 |
PDF描述 |
|---|---|
| S-8520E35MC-BJU-T2 | 0.05 A SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO5 |
| S-AU27AM | 450 MHz - 490 MHz RF/MICROWAVE NARROW BAND HIGH POWER AMPLIFIER |
| S-AU80 | RF/MICROWAVE NARROW BAND HIGH POWER AMPLIFIER |
| S103BN | 200 MHz - 2000 MHz RF/MICROWAVE SGL POLE SGL THROW SWITCH, 1.7 dB INSERTION LOSS |
| S10L0C-P03MJG0-5200 | 3 CONTACT(S), COPPER ALLOY, MALE, CIRCULAR CONNECTOR, CRIMP, PLUG |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| S-8520E50MC-BKJ-T2 | 功能描述:DC/DC 開關控制器 5.0V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8520E50MC-BKJT2G | 功能描述:DC/DC 開關控制器 5.0V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8520E50MC-BKJT2U | 功能描述:IC REG CTRLR BUCK SOT23-5 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 輸出類型:晶體管驅(qū)動器 功能:降壓 輸出配置:正 拓撲:降壓 輸出數(shù):1 輸出階段:1 電壓 - 電源（Vcc/Vdd）:2.5 V ~ 10 V 頻率 - 開關:300kHz 占空比（最大）:1 同步整流器:無 時鐘同步:無 串行接口:- 控制特性:使能 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:SC-74A，SOT-753 供應商器件封裝:SOT-23-5 標準包裝:1 |
| S-8520E52MC-BKLT2G | 功能描述:DC/DC 開關控制器 Step Down SWR PWM 300kHz 100uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8520F15MC-BNAT2G | 功能描述:DC/DC 開關控制器 Step Down SWR PWM 300kHz 100uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購，3分鐘左右您將得到回復。