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參數(shù)資料
| 型號： | S-8352D30MC-K8P-T2 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.3 A SWITCHING CONTROLLER, 110 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 13/50頁 |
| 文件大?。?/td> | 635K |
| 代理商： | S-8352D30MC-K8P-T2 |
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STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
S-8351/8352 Series
Rev.1.2_00
Seiko Instruments Inc.
20
3. Capacitor (CIN, CL)
A capacitor on the input side (CIN) improves the efficiency by reducing the power impedance and stabilizing the input
current. Select a CIN value according to the impedance of the power supply used.
A capacitor on the output side (CL) is used for smoothing the output voltage. For step-up types, the output voltage
flows intermittently to the load current, so step-up types need a larger capacitance than step-down types. Therefore,
select an appropriate capacitor in accordance with the ripple voltage, which increases in case of a higher output
voltage or a higher load current. The capacitor value should be 10
F or more.
A capacitor at the output side (CL) is used for smoothing the ripple voltage. Select an appropriate capacitor with a
small equivalent series resistance (RESR) and a large capacitance. The capacitor value should be 10
F or mpre. A
tantalum electrolytic capacitor and an organic semiconductor capacitor are especially recommended because of their
superior low-temperature and leakage current characteristics.
4. External Transistor (S-8352 Series)
For the S-8352 Series, connecting an external transistor increases the output current. An enhancement (N-channel)
MOS FET type or a bipolar (NPN) type can be used as the external transistor.
4.1 Enhancement (N-channel) MOS FET Type
Figure 19
is a circuit example using a MOS FET transistor (N-channel).
VOUT
EXT
VOUT
+
OFF
/
ON
*1
VSS
+
*1.
For A type.
Figure 19 Circuit Example Using MOS FET (N-channel) Type
An N-channel power MOS FET should be used for the MOS FET. In particular, the EXT pin can drive a MOS FET
with a gate capacitance of around 1000 pF. Because the gate voltage and current of the external power MOS
FET are supplied from the stepped-up output voltage (VOUT), the MOS FET is driven more effectively.
A large current may flow during startup, depending on the MOS FET selection. The S-8352 Series does not
feature overcurrent protection for the external MOS FET, so perform sufficient evaluation using the actual devices.
Also recommend to use a MOS FET with an input capacitance of 700 pF or less.
Since the ON-resistance of the MOS FET might depend on the difference between the output voltage (VOUT) and
the threshold voltage of the MOS FET, and affect the output current as well as the efficiency, the threshold voltage
should be low. When the output voltage is as low as 2.0 V, like in the S-8352A20, the circuit operates only when
the MOS FET has a threshold voltage lower than the output voltage.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8352D30MC-K8PT2G | 功能描述:DC/DC 開關(guān)控制器 Step-Up SWR PFM 100kHz 23.2uA 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-8352D33MC-K8ST2G | 功能描述:DC/DC 開關(guān)控制器 Step-Up SWR PFM 100kHz 23.2uA 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-8352D60MC-K9TT2U | 功能描述:IC REG CTRLR BOOST 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:升壓 輸出配置:正 拓撲:升壓 輸出數(shù):1 輸出階段:1 電壓 - 電源（Vcc/Vdd）:0.9 V ~ 10 V 頻率 - 開關(guān):100kHz 占空比（最大）:0.8 同步整流器:無 時鐘同步:無 串行接口:- 控制特性:- 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 標準包裝:1 |
| S-8353A20MC-IQFT2G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Step-Up SWR PWM 18.7uA Iq RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| S-8353A25MC-IQK-T2 | 功能描述:DC/DC 開關(guān)控制器 2.5V Step-Up 2.4% 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 |
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