參數(shù)資料
型號(hào)： S-1121B45MC-N3ETFU
元件分類： 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器
英文描述： 4.5 V FIXED POSITIVE LDO REGULATOR, 0.26 V DROPOUT, PDSO5
封裝： HALOGEN AND LEAD FREE, SOT-23, 5 PIN
文件頁(yè)數(shù)： 6/25頁(yè)
文件大小： 265K
代理商： S-1121B45MC-N3ETFU
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1111/1121 Series
Rev.5.0_00
Seiko Instruments Inc.
14
Operation
1. Basic operation
Figure 11 shows the block diagram of the S-1111/1121 Series.
The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistance-
divided by feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage necessary
to ensure a certain output voltage free of any fluctuations of input voltage and temperature.
Reference voltage
circuit
VOUT
*1
*1.
Parasitic diode
VSS
VIN
Rs
Rf
Error
amplifier
Current
supply
Vref
+
Vfb
Figure 11
2. Output transistor
The S-1111/1121 Series uses a low on-resistance P-channel MOS FET as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due
to inverse current flowing from VOUT pin through a parasitic diode to VIN pin.
相關(guān)PDF資料
PDF描述
S-1121B44MC-N3DTFU 4.4 V FIXED POSITIVE LDO REGULATOR, 0.26 V DROPOUT, PDSO5
S-1121B43MC-N3CTFU 4.3 V FIXED POSITIVE LDO REGULATOR, 0.26 V DROPOUT, PDSO5
S-1121B41MC-N3ATFU 4.1 V FIXED POSITIVE LDO REGULATOR, 0.26 V DROPOUT, PDSO5
S-1121B40MC-N2ZTFU 4 V FIXED POSITIVE LDO REGULATOR, 0.26 V DROPOUT, PDSO5
S-1121B39MC-N2YTFU 3.9 V FIXED POSITIVE LDO REGULATOR, 0.26 V DROPOUT, PDSO5
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-1121B46MC-N3FTFG 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH RIPPLE-REJECTION LOW DROPOUT
S-1121B47MC-N3GTFG 制造商:Seiko Instruments Inc (SII) 功能描述:LINEAR LDO REG HI 50UA IQ 150MA IOUT
S-1121B48MC-N3HTFG 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH RIPPLE-REJECTION LOW DROPOUT
S-1121B49MC-N3ITFG 制造商:Seiko Instruments Inc (SII) 功能描述:
S-1121B4HMC-N3PTFG 制造商:Seiko Instruments Inc (SII) 功能描述:LDO Voltage Regulators LINEAR LDO REG HI 50UA IQ 150MA IOUT
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