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)： 14/16頁
文件大小： 123K
代理商： NCV8509PDW25R2
NCV8509 Series
http://onsemi.com
14
V
OUT1
V
OUT2
Short On
V
OUT1
Short On
V
OUT2
≈
10
μ
s
≈
10
μ
s
Fast SLEW Rate >> Soft Start
Figure 40. Fault Response. Note the High SLEW Rate Coming Out of Fault Conditions.
Soft Start Only Applies to a Power Up Sequence.
Fast SLEW Rate >> Soft Start
Decay Time Dependent
on External Load
Decay Time Dependent
on External Load
Disable Time
Disable Time
Slew Rate Control
Figure 41 shows the circuitry associated with Slew Rate
Control. The diagram highlights the control of one output for
simplicity. V
OUT1
and V
OUT2
are both controlled on the IC.
The slew rate capacitor (C
SLEW
) is charged with an
onchip current source runing at 6.0 A (typ.). Charging a
capacitor with a current source creates a linear voltage ramp
as shown in Figure 42.
The lowest voltage to the positive terminals of the
comparator (Error Amp) dominates the output voltage
(V
OUT
). Consequently, when C
SLEW
is fully discharged on
power up, it is the dominant factor on the positive terminal
and disables the output. The output (V
OUT
) follows the
linear ramp on the SLEW pin (after being gained up with R1
and R2) until V
BG
becomes the dominant voltage. This
occurs when SLEW = V
BG
+ V
D1
or approximately 1.8 V.
R1
+
+
V
OUT
R2
Error Amp
SLEW
C
SLEW
6.0
μ
A
Internal
Voltage
Rail
≈
3.8 V
D2
V
IN1
D1
V
BG
Figure 41. Slew Control Circuitry
Slew time can be calculated using the standard capacitor
equation.
Cdt, t
Using a 33 nF capacitor, the slew time is:
(33 nF)(1.8 V)
6 A
The corresponding slew rate for this is 1.8 V/9.9 ms =
182 V/s ON THE SLEW PIN.
To calculate the slew rate on outputs, you must multiply
by the gain set up by R1 and R2.
VOUT
1.28 V
For a 5 V output, the gain would be:
5 V
1.28 V
assuming V
BG
= 1.28 V.
The resultant slew rate on the output is the slew rate on the
SLEW pin multiplied by the gain, or:
(182 V s)
(3.9 V V)
I
C( V)
I
t
9.9 ms
Av
Av
3.9 V V
710 V s
Outputs in Regulation
Figure 42.
Time (ms)
S
3.8
1.8
t
SLEW
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)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*