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參數(shù)資料
| 型號(hào)： | S-8460B00AFT-TB |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 31/33頁 |
| 文件大小： | 617K |
| 代理商： | S-8460B00AFT-TB |
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STEP-UP OR DOWN, SINGLE-COIL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
Rev.1.2_00
S-8460
Seiko Instruments Inc.
7
Operation
1. Step-up or Step-down DC-DC Converter
1. 1 Basic Operation
The S-8460 automatically selects step-up operation or step-down operation to hold the output voltage constant
according to the input voltage (VIN), output voltage (VOUT), and output current (IOUT). A high-efficient power supply
can be constructed using the S-8460, since the S-8460 works as a switching regulator for both step-up and step-
down operation.
Figure 6
shows the block diagram of the S-8460.
Internal circuits operate on the internal voltage (VL) except pre-driver circuit for EXT1 and ON/OFF circuit. When
VIN is 4.5 V or more, the voltage is stepped down to 4.5 V and when VIN is lower than 4.5 V, VL is set to VIN. The
output voltage of the pre-driver circuit for EXT1 lies between the BST pin voltage VBST and the LX pin voltage VLX
where the BST pin voltage VBST is normally VLX + VL. The gate to source voltages for all external MOS FETs,
SW1 to SW3, thus become VL, which drives these external MOS FETs.
FB
EXT3
PWM step-up and
step-down selection
VSS DVSS
CPRO
CSS
VL
EXT2
LX
VIN
BST
EXT1
+
ON / OFF
Voltage
source
Oscillation
circuit
Overload
protection
Reference voltage
with soft-start
Figure 6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8460B00AFT-TBG | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2.5-6.0V Step-Up/Dwn RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S846E2000M2 | 制造商:STEC Inc 功能描述:S800 SAS SSD 2.5" 15MM 2TB MLC COMMERCIAL (0C TO +60C) - Bulk |
| S846E200M1 | 制造商:STEC Inc 功能描述:S800 SAS SSD 1.8" 5MM 200GB MLC COMMERCIAL (0C TO +60C) - Bulk |
| S-8470 | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:CMOS POWER MANAGEMENT IC |
| S-8470AFS | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:CMOS POWER MANAGEMENT IC |
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