參數(shù)資料
型號： S-812C26AY-Z
元件分類： 固定正電壓單路輸出LDO穩(wěn)壓器
英文描述： 2.6 V FIXED POSITIVE LDO REGULATOR, 0.68 V DROPOUT, PBCY3
封裝： TO-92, 3 PIN
文件頁數(shù)： 9/49頁
文件大?。?/td> 873K
代理商： S-812C26AY-Z
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
Rev.2.0_01
S-812C Series
Seiko Instruments Inc.
17
2. Constant Current Circuit
The S-812C series can be served in a constant current circuit as shown in the Figure 18 and Figure 19.
Constant current IO is calculated from the following equation:
IO = (VOUT(E)
÷ RL) +ISS, where VOUT(E) is the effective output voltage.
Please note that in case of the circuit shown in the Figure 18 the magnitude of the constant current IO is
limited by the driving ability of the S-812C.
The circuit shown in the Figure 19 can, however, provide the current beyond the driving ability of the S-
812C by combining a constant current circuit with a current boost circuit. The maximum input voltage for
the constant current circuit is the sum of the voltage VO of the device and 16 V. It is not recommended to
attach a capacitor between the S-812C power source VIN and VSS pins or between output VOUT and
VSS pins because rush current flows at power-on.
GND
RL
VOUT
VIN
VOUT
VO
IO
CIN
ON/OFF
VSS
S-812C
Series
Device
Figure 18 Constant Current Circuit
IO
ON/OFF
R1
GND
RL
VOUT
VIN
VOUT
CL
VSS
S-812C
Series
Tr1
VO
Device
Figure 19 Constant Current Boost Circuit
3. Output Voltage Adjustment Circuit
(Only for S-812CxxA Series (No short-circuit protection and shutdown function))
The output voltage can be increased using the configuration shown in the Figure 20. The output
Voltage (VOUT1) can be calculated using the following equation;
VOUT1 = VOUT(E) x (R1 + R2)
÷ R1 + R2 x ISS, where VOUT(E) is the effective output voltage.
Value of R1 and R2 should be determined so as not to be affected by the current consumption ISS.
Capacitor C1 has an effect in minimizing output fluctuation due to power-on, power line variation and
load variation. Determine the optimum value in the actual device.
It is not also recommended to attach a capacitor between the S-812 power source VIN and VSS pins or
between output VOUT and VSS pins because output fluctuation or oscillation at powering on might occur.
GND
VOUT1
R2
R1
VOUT
VIN
VIN
CL
C1
CIN
VSS
S-812C
Series
Figure 20
相關(guān)PDF資料
PDF描述
S-812C28AY-B 2.8 V FIXED POSITIVE LDO REGULATOR, 0.68 V DROPOUT, PBCY3
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-812C26BMC-C4GT2G 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
S-812C26BPI-C4GTFG 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
S-812C27AMC-C2H-T2 功能描述:低壓差穩(wěn)壓器 - LDO 2.7V 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
S-812C27AMC-C2HT2G 功能描述:低壓差穩(wěn)壓器 - LDO 2.7V 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
S-812C27AMC-C2HT2U 功能描述:IC REG LINEAR 30MA 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 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商器件封裝:SOT-23-5 標準包裝:1
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