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參數(shù)資料
| 型號： | EL7563CRE-T13 |
| 廠商： | ELANTEC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Monolithic 4 Amp DC:DC Step-Down Regulator |
| 中文描述： | 5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | HTSSOP-28 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 635K |
| 代理商： | EL7563CRE-T13 |
11
FN7296.2
May 13, 2005
Reference
A 1.5% temperature compensated bandgap reference is
integrated in the EL7563. The external V
REF
capacitor acts
as the dominant pole of the amplifier and can be increased
in size to maximize transient noise rejection. A value of
0.1μF is recommended.
Oscillator
The system clock is generated by an internal relaxation
oscillator with a maximum duty-cycle of approximately 95%.
Operating frequency can be adjusted through the C
OSC
pin
or can be driven by an external source. If the oscillator is
driven by an external source care must be taken in selecting
the ramp amplitude. Since C
SLOPE
value is derived from the
C
OSC
ramp, changes to C
OSC
ramp will change the
C
SLOPE
compensation ramp which determine the open-loop
gain of the system.
When external synchronization is required, always choose
C
OSC
such that the free-running frequency is at least 20%
lower than that of sync source to accommodate component
and temperature variations. Figure 22 shows a typical
connection.
Junction Temperature Sensor
An internal temperature sensor continuously monitors die
temperature. In the event that die temperature exceeds the
thermal trip-point, the system is in fault state and will be shut
down. The upper and low trip-points are set to 135°C and
115°C respectively.
The VTJ pin is an accurate indication of the internal silicon
junction temperature (see performance curve.) The junction
temperature T
J
(°C) can be deducted from the following
relation:
Where VTJ is the voltage at VTJ pin in volts.
Power Good and Power On Reset
During power up the output regulator will be disabled until
V
IN
reaches a value of approximately 2.9V. About 300mV
hysteresis is present to eliminate noise-induced
oscillations.
Under-voltage and over-voltage conditions on the regulator
output are detected through an internal window comparator.
A logic high on the PG output indicates that the regulated
output voltage is within about +10% of the nominal selected
output voltage.
2
3
16
15
14
13
5
6
7
12
11
9
8
10
19
18
EL7563
1
20
EXTERNAL
OSCILLATOR
BAT54S
100pF
390pF
FIGURE 22. OSCILLATOR SYNCHRONIZATION
T
J
75
----------–
+
=
EL7563
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL7563CRE-T7 | Monolithic 4 Amp DC:DC Step-Down Regulator |
| EL7563CRE | Monolithic 4 Amp DC:DC Step-Down Regulator |
| EL7563CREZ | Monolithic 4 Amp DC:DC Step-Down Regulator |
| EL7563CREZ-T13 | Monolithic 4 Amp DC:DC Step-Down Regulator |
| EL7563CREZ-T7 | Monolithic 4 Amp DC:DC Step-Down Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL7563CRE-T7 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Monolithic 4 Amp DC:DC Step-Down Regulator |
| EL7563CRE-TZ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| EL7563CREZ | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 EL7563CREZ PROGRAM 5P PWR MGR 12 4A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| EL7563CREZ-T13 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 EL7563CREZ PROGRAM 5P PWR MGR 12 4A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| EL7563CREZ-T7 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 EL7563CREZ PROGRAM 5P PWR MGR 12 4A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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