- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363237 > NCV8509PDW25R2 (ON SEMICONDUCTOR) Sequenced Linear Dual-Voltage Regulator PDF資料下載
參數(shù)資料
| 型號： | NCV8509PDW25R2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Sequenced Linear Dual-Voltage Regulator |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE REGULATOR, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 123K |
| 代理商： | NCV8509PDW25R2 |
NCV8509 Series
http://onsemi.com
12
Power Dissipation
NCV8509 has a power shunt circuit which reduces the
power on chip by utilizing an external resistor, R
EX
. Thus
the power on chip, P
IC
, is equal to the total power, P
T
, minus
the power dissipated in the resistor P
REX
. Refer to Figure 37.
PIC
PTOTAL
where
PREX
(1)
(2)
PTOTAL
(VIN1
VOUT1)IOUT1
(VIN1
VOUT2) IOUT2
(VIN1
Iq)
and
PREX
(VIN1
VIN2) IOUT2
(3)
Figure 37.
NCV8509
Control
Circuitry
I
OUT2
I
OUT1
Iq
V
OUT1
GND
V
OUT2
Q3
Q2
Q1
R
EX
V
Z
V
IN2
V
IN1
Shunt
V
SAT
+
VIN1
VREF
VIN1
VSAT
(IOUT2
REX)
(4)
VIN2
for VIN1
for (VREF
for (VREF
(VREF
VSAT)
(IOUT2
VSAT)
VIN1
IOUT))
(VREF
VIN1
(IOUT2
REX))
where V
REF
= V
Z
V
BE
when Q1 is normally conducting.
Based on equation 3, the power in R
EX
is dependent on
V
IN2
. The voltage on V
IN2
is controlled by the shunt circuit,
which has three modes of operation, as seen in Figure 38.
Mode 1.
At low battery V
IN2
is equal to V
IN1
minus the
saturation voltage of the shunt output NPN.
Mode 2.
Once V
IN1
rises above the reference voltage of
the shunt circuit, V
IN2
will regulate at the V
REF
.
Mode 3.
V
IN2
would continue to regulate at V
REF
, but
since I
OUT2
is not infinite, when V
IN1
rises higher than the
reference voltage plus the voltage drop across the external
resistor R
EX
, it will force V
IN2
to be V
IN1
(I
OUT2
×
R
EX
).
Equation 4 provides a summary for V
IN2.
Combining equations 3 and 4 gives three different
equations for power across R
EX
.
PMODE1
(VSAT
IOUT2)
(5)
PMODE2
(VIN1
VREF)
IOUT2
(6)
PMODE3
IOUT22
REX
(7)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCV8509PDW26 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW26R2 | Sequenced Linear Dual-Voltage Regulator |
| NCV8512 | 5.0 V Micropower 150 mA LDO Linear Regulator with DELAY, Adjustable RESET, and Monitor FLAG |
| NCV8512PW50G | 5.0 V Micropower 150 mA LDO Linear Regulator with DELAY, Adjustable RESET, and Monitor FLAG |
| NCV8512PW50R2G | 5.0 V Micropower 150 mA LDO Linear Regulator with DELAY, Adjustable RESET, and Monitor FLAG |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8509PDW25R2G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 2.5V 100mA Sequenced Dual RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| NCV8509PDW26 | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 2.6V 100mA Sequenced RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| NCV8509PDW26G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 2.6V 100mA Sequenced Dual RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| NCV8509PDW26R2 | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 2.6V 100mA Sequenced RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| NCV8509PDW26R2G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 2.6V 100mA Sequenced Dual RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。