參數(shù)資料
型號(hào)： S-812C27AY-X
廠商： Seiko Instruments Inc.
英文描述： HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
中文描述： 高工作電壓CMOS電壓穩(wěn)壓器
文件頁(yè)數(shù)： 7/26頁(yè)
文件大?。?/td> 332K
代理商： S-812C27AY-X
Rev.1.0
S-812C Series
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
Seiko Instruments Inc.
7
5. Dropout voltage (Vdrop)
This parameter indicates the difference between the input voltage (V
IN
1) and the output voltage when output
voltage falls to 98 % of V
OUT
(E) by gradually decreasing the input voltage (V
IN
).
Vdrop = V
IN
1-[V
OUT
(E) × 0.98]
6. Temperature coefficient of output voltage [
V
OUT
/(
Ta
V
OUT
)]
The output voltage lies in the shaded area in the whole operating temperature shown in figure 8 when the
temperature coefficient of the output voltage is
±
100 ppm/
°
C.
-40
25
+0.30mV/
°
C
V
OUT
[V]
V
OUT
(E) is a measured value of
output voltage at 25
°
C.
V
OUT
(E)
85
Ta [
°
C]
-0.30mV/
°
C
Figure 8 Example for the S-812C30A
Temperature change ratio for output voltage [mV/°C] is calculated by using the following equation.
[
Ta
Ta V
OUT
]
[
]
V
mV/ C
V
(S) V
V
ppm/ C
1000
OUT
OUT
OUT
=
×
÷
Description of Operation
1. Basic operation
Figure 9 shows the block diagram of the S-812C
series.
The error amplifier compares a reference voltage
V
ref
with a part of the output voltage divided by the
feedback resistors Rs and Rf, and supplies the gate
voltage to the output transistor, necessary to ensure
certain output voltage independent from change of
input voltage and temperature.
2. Output transistor
The S-812C Series uses a Pch MOS transistor as the output transistor.
The voltage at VOUT must not exceed VIN+0.3V. When the VOUT voltage becomes higher than that of VIN,
reverse current flows and may break the regulator since a parasitic diode between VOUT and VIN exists
inevitably.
Reference
voltage
VOUT
*
* : Parasitic diode
VSS
VIN
Rs
Rf
Figure 9 Block Diagram
Error amplifier
Current
source
Vref
Specified output voltage
Output voltage temperature coefficient
Temperatures change ratio for output voltage
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-812C27AY-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-812C27BMC-C4HT2G 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
S-812C27BMC-C4HT2U 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 穩(wěn)壓器數(shù):1 電流 - 輸出:30mA 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1
S-812C27BPI-C4HTFG 功能描述:低壓差穩(wěn)壓器 - LDO LDO REG 75MA OUT 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-812C27BPI-C4HTFU 功能描述:IC REG LINEAR 30MA SNT6A 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 輸出配置:正 輸出類型:固定 穩(wěn)壓器數(shù):1 電壓 - 輸入（最大值）:16V 電壓 - 輸出（最小值/固定）:2.7V 電壓 - 輸出（最大值）:- 壓降（最大值）:0.68V @ 10mA 電流 - 輸出:30mA 電流 - 靜態(tài)（Iq):1.6μA 電流 - 電源（最大值）:2.5μA PSRR:- 控制特性:使能 保護(hù)功能:短路 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:6-SMD，扁平引線 供應(yīng)商器件封裝:SNT-6A（H） 標(biāo)準(zhǔn)包裝:1
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