参数资料
| 型号： | EL7563CMZ |
| 厂商： | Intersil |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 20SOIC |
| 标准包装： | 38 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1 V ~ 2.5 V |
| 输入电压： | 3 V ~ 3.6 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 4A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 20-SO |
EL7563
T J = 75 + 1.2 – VTJ
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:
-------------------------
0.00384
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.
1
20
A logic high on the PG output indicates that the regulated
output voltage is within about +10% of the nominal selected
100pF
BAT54S
2
19
output voltage.
EXTERNAL
OSCILLATOR
390pF
3
5
18
16
6
7
8
9
10
EL7563
15
14
13
12
11
FIGURE 22. OSCILLATOR SYNCHRONIZATION
11
FN7296.2
May 13, 2005
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EL7563CMZ-T13 | 功能描述:直流/直流开关调节器 EL7563CMZ PROGRAM 5P PWR MGR 12 4A RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| EL7563CRE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| EL7563CRE-T13 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Monolithic 4 Amp DC:DC Step-Down Regulator |
| EL7563CRE-T7 | 制造商:INTERSIL 制造商全称: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: |
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