參數(shù)資料
型號(hào)： S-812C28AY-B
元件分類： 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器
英文描述： 2.8 V FIXED POSITIVE LDO REGULATOR, 0.68 V DROPOUT, PBCY3
封裝： TO-92, 3 PIN
文件頁(yè)數(shù)： 8/49頁(yè)
文件大?。?/td> 873K
代理商： S-812C28AY-B
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.2.0_01
16
Seiko Instruments Inc.
Selection of External Components
1. Output Capacitor (CL)
The S-812C series can provide stable operation without output capacitor (CL) since the regulator has an
internal phase compensation circuit to stabilize operation when the load changes. The transient response
of the regulator, however, changes with the output capacitor and the magnitude of overshoot and
undershoot on output voltage accordingly changes. Please refer to CL dependence data in “ Reference
Data 1. Transient Response Characteristics” to select suitable value for the capacitor.
When a tantalum or an aluminum electrolytic capacitor is used, the ESR of the capacitor shall be 10
or
less. When an aluminum electrolytic capacitor is used attention should be especially paid to since the
ESR of the aluminum electrolytic capacitor increases at low temperature and possibility of oscillation
becomes large. Sufficient evaluation including temperature characteristics is indispensable.
Application Circuit
1. Output Current Boosting Circuit
As shown in Figure 17, the output current can be boosted by externally attaching a PNP transistor.
The S-812C controls the base current of the PNP transistor so that the output voltage VOUT becomes
the voltage specified in the S-812C if the sufficient base-emitter voltage VBE to turn on the PNP
transistor is obtained between input voltage VIN and S-812C power source pin VIN.
As the transient response characteristics of the circuit shown in Figure 17 is not enough in some
applications, evaluation for output variation due to power-on, power line variation and load variation in
actual condition is needed before massproduction.
Note that the short-circuit protection incorporated in the S-812C series does not work as a short-circuit
protection for the boost circuit.
R1
Tr1
GND
VOUT
ON/OFF
VIN
VSS
VIN
VOUT
CL
S-812C
Series
CIN
Figure 17
相關(guān)PDF資料
PDF描述
S-812C44AUA-C2Y-T2 4.4 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PSSO3
S-812C47AUA-C3B-T2 4.7 V FIXED POSITIVE LDO REGULATOR, 0.27 V DROPOUT, PSSO3
S-812C51AY-B 5.1 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PBCY3
S-812C53AMC-C3H-T2 5.3 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PDSO5
S-817A22ANB-CUL-T2 2.2 V FIXED POSITIVE LDO REGULATOR, 0.67 V DROPOUT, PDSO4
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-812C28AY-B2-U 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 1.0uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
S-812C28AY-B-G 制造商:Seiko Instruments Inc (SII) 功能描述:IC REG LDO 2.8V 0.03A TO92-3
S-812C28AY-X 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C28AY-X-G 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C28BMC-C4IT2G 功能描述:低壓差穩(wěn)壓器 - LDO Linear LDO Reg 1.0uA Iq 75mA Iout ON/OFF RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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