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参数资料
| 型号： | EL7566DRE-EVAL |
| 厂商： | Intersil |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | DEMO BOARD FOR EL7566 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.8V |
| 电流 - 输出： | 6A |
| 输入电压： | 3 ~ 6 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | EL7566 |
EL7566
The V TJ pin reports a voltage proportional to the junction
temperature. Equation 3 illustrates the relationship and can
be used to accurately evaluate thermal design points.
0.00384
1.2 – V TJ
T J = 75 + ------------------------
LINEAR START-UP
In the linear start-up tracking configuration, the regulator with
lower output voltage, V O2 , tracks the one with higher output
voltage, V O1 .
C
Full Start-Up Control
-
-
STN
The EL7566 offers full start-up control. The core of this
control is a start-up comparator in front of the main PWM
controller. The STP and STN are the inputs to the
V O2
+
EL7566
V O1
V IN
+
EL7566
STP
R
V IN
comparator, whose HI output forces the PWM comparator to
skip switching cycles. The user can choose any of the
T ST = RC ? --------- ?
following control configurations:
ADJUSTABLE SOFT-START
In this configuration, the ramp-up time is adjustable to any
time longer than the building soft-start time of 2ms. The
approximate ramp-up time, T ST , is:
? V O ?
? V IN ?
V O1
V O2
FIGURE 23. LINEAR START-UP TRACKING
OFFSET START-UP
Compared with the cascade start-up, this configuration
allows Regulator 2 to begin the start-up process when V O1
reaches a particular value of V REF *(1+R B /R A ) before PG
goes HI, where V REF is the regulator reference voltage.
V REF =1.26.
-
STN
C
0.1μF
V O
+
STP
R
200K
V O
V REF
R B
EL7566
V IN
T ST
V O2
-
+
R A
V O1
FIGURE 21. ADJUSTABLE START-UP
CASCADE START-UP
In this configuration, EN pin of Regulator 2 is connected to
the PG pin of Regulator 1 (Figure 22). V O2 will only start
after V O1 is good.
EL7566
V IN
V REF (1+R B /R A )
V O1
V O2
EL7566
V IN
FIGURE 24. OFFSET START-UP TRACKING
EN
PG
Component Selection
V O2
EL7566
V O1
EL7566
V IN
INPUT CAPACITOR
The main functions of the input capacitor(s) are to maintain
the input voltage steady and to filter out the pulse current
I IN,RMS = ----------------------------------------------- × I O ≈ 1/2 ( I O )
V O1
V O2
FIGURE 22. CASCADE START-UP
11
passing through the upper switch. The root-mean-square
value of this current is:
V O × ( V IN – V O )
V IN
for a wide range of V IN and V O .
For long-term reliability, the input capacitor or combination of
capacitors must have the current rating higher than I IN,RMS .
Use X5R or X7R type ceramic capacitors, or SPCAP or
POSCAP types of Polymer capacitors for their high current
handling capability.
FN7102.7
May 8, 2006
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EL7566DRE-T13 | 功能描述:IC REG BUCK SYNC ADJ 6A 28HTSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| EL7566DRE-T7 | 功能描述:IC REG BUCK SYNC ADJ 6A 28HTSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| EL7566DREZ | 功能描述:直流/直流开关调节器 EL7566DREZ 6 AMP DC: DC STP DWNG 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 |
| EL7566DREZ-T13 | 功能描述:直流/直流开关调节器 EL7566DREZ 6 AMP DC: DC STP DWNG 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 |
| EL7566DREZ-T7 | 功能描述:直流/直流开关调节器 EL7566DREZ 6 AMP DC: DC STP DWNG 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 |
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