- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374714 > SC1452XIMSTR (Semtech Corporation) DUAL 150mA LDO REGULATOR WITH PROGRAMMABLE RESET PDF資料下載
參數(shù)資料
| 型號(hào)： | SC1452XIMSTR |
| 廠商： | Semtech Corporation |
| 英文描述： | DUAL 150mA LDO REGULATOR WITH PROGRAMMABLE RESET |
| 中文描述： | 150mA雙路LDO具有可編程復(fù)位 |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大小： | 116K |
| 代理商： | SC1452XIMSTR |
SC1452
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PRELIMINARY - August 7, 2000
6
DUAL 150mA LDO REGULATOR WITH
PROGRAMMABLE RESET
voltage is reached. The delay time can be calculated by
rearranging the above equation, solving for t:
Note that the
maximum
delay time is 150ms, as RSTB
goes high when either the internal timer or externally
set timer times out, so if t
is set externally for
200ms, the reset delay will still be 150ms. Thus for a
150ms delay, DLYB should be grounded, and for a
delay time
less
than 150ms, C
DLYB
can be calculated
using the equation above, or read from the chart below.
APPLICATIONS INFORMATION
Adjusting RSTB Delay Time
RSTB, the power on reset for regulator B, can be
reduced
externally by connecting a capacitor to the
delay time set pin DLYB. If DLYB is connected to
ground, the internally controlled delay time of 150ms
(typ.) will apply.
Referring to the block diagram, as the output of regula-
tor B (V
) rises and reaches the reset threshold
voltage (92% V
), two things happen:
1) the internal 150ms timer starts;
2) the 3μA current source turns on, charging C
DLYB
(if
connected).
If DLYB is connected to ground, RSTB goes high
150ms after V
crosses the threshold voltage. If a
capacitor is connected between DLYB and ground, the
voltage at DLYB can be described by the following
equation:
An internal comparator compares this voltage to a
1.25V reference, and triggers the reset high once this
DLYB
6
DLYB
V
C
t
10
3
=
DLYB
6
DLYB
3
RSTB
C
667
,
416
10
25
.
1
C
t
=
=
0.01
0.1
1
10
100
1000
0.1
1
10
100
1000
C
DLYB
(nF)
t
R
t
RSTB
= 150ms max.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC1452 | DUAL 150mA LDO REGULATOR WITH PROGRAMMABLE RESET |
| SC1453-1.5ISKTR | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1453-1.8ISKTR | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1453-2.5ISKTR | RES POWER .024 OHM 1W 5% SMT |
| SC1453-2.7ISKTR | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1452XIMSTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual 150mA LDO Regulator with Programmable Reset |
| SC1453 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453_06 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453_08 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453-1.5ISKTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。