- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄271889 > S-8521F32MC-BPR-T2G 0.05 A SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO5 PDF資料下載
參數(shù)資料
| 型號(hào)： | S-8521F32MC-BPR-T2G |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.05 A SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | LEAD FREE, SOT-23, 5 PIN |
| 文件頁數(shù)： | 16/44頁 |
| 文件大?。?/td> | 511K |
| 代理商： | S-8521F32MC-BPR-T2G |
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(dāng)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頁第44頁
STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.9.0_00
S-8520/8521 Series
Seiko Instruments Inc.
23
Application Circuits
1.
External adjustment of output voltage
In the S-8550/8521 Series, by adding external resistors (RA, RB) and a capacitor (CFB), the output voltage can be
adjusted or be set freely in the range of 1.5 to 6.0 V, as shown in Figure 14. Temperature gradient can be given by
inserting a thermistor in series to RA and RB.
S-8520/8521 Series
CC
RA
RB
D1
VOUT
VSS
+
VIN
OUT
EXT
+
R2
R1
Oscillation
Circuit
PWM control or PWM /
PFM switching control unit
Reference voltage
source with soft start
ON/OFF
______
Figure 14
Caution
The above connection diagram and constant will not guarantee successful operation. Perform
through evaluation using the actual application to set the constant.
The S-8520/8521 Series have an internal impedance of R1 and R2 between the VOUT pin and the VSS pin, as
shown in Figure 14.
Therefore, OUT (the output voltage) is determined by the output voltage value (VOUT) of the S-8520/8521 Series,
and the ratio of the parallel resistance value of external resistance (RB) and internal resistances (R1 + R2) of the IC,
to external resistance (RA). The output voltage is expressed by the following equation:
OUT = VOUT + VOUT × RA ÷ (RB //
*1(R
1 + R2))
*1.
// shows the combined resistance in parallel.
The voltage accuracy of the OUT set by resistances (RA and RB) is not only affected by the IC’s output voltage
accuracy (VOUT ±2.4 %), but also by the absolute precision of external resistances (RA and RB) in use and the
absolute value deviations of internal resistances (R1 and R2) in the IC.
Let us designate the maximum deviations of the absolute value of RA and RB by RA max. and RB max., respectively,
the minimum deviations by RA min. and RB min., respectively, and the maximum and minimum deviations of the
absolute value of R1 and R2 in the IC by (R1 + R2) max. and (R1 + R2) min., respectively. Then, the minimum
deviation value OUT min. and the maximum deviation value OUT max. of the OUT are expressed by the following
equations:
OUT min. = VOUT × 0.976 + VOUT × 0.976 × RA min. ÷ (RB max. // (R1 + R2) max.)
OUT max. = VOUT × 1.024 + VOUT × 1.024 × RA max. ÷ (RB min. // (R1 + R2) min.)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S-80160BLMC-JFLT2U | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| S-80160CLMC-JJLT2U | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| S-8353J25MC-IYKT2U | SWITCHING REGULATOR, 287.5 kHz SWITCHING FREQ-MAX, PDSO5 |
| S-80810CNPF-B9OTFU | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| SMHF2815D/HR | 2-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8521F33MC-BPS-T2 | 功能描述:DC/DC 開關(guān)控制器 3.3V Step-Dn PWM/PFM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| S-8521F33MC-BPST2G | 功能描述:DC/DC 開關(guān)控制器 3.3V Step-Dn PWM/PFM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| S-8521F34MC-BPTT2G | 功能描述:DC/DC 開關(guān)控制器 Step Down SWR PWM/ PFM 300kHz 100uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| S-8521F36MC-BPVT2G | 功能描述:DC/DC 開關(guān)控制器 StepDOWN SWR PWM/PFM 300kHz 100uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| S-8521F38MC-BPXT2U | 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(dòng)器 功能:降壓 輸出配置:正 拓?fù)?降壓 輸出數(shù):1 輸出階段:1 電壓 - 電源（Vcc/Vdd）:2.5 V ~ 16 V 頻率 - 開關(guān):300kHz 占空比（最大）:1 同步整流器:無 時(shí)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(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。