參數(shù)資料
型號： HIP6521CB-T
廠商： Intersil
文件頁數(shù)： 7/13頁
文件大小： 356K
描述： IC REG QD BCK/LINEAR SYNC 16SOIC
標(biāo)準(zhǔn)包裝： 2,500
拓?fù)洌?/td> 降壓（降壓）同步（1），線性（LDO）（3）
功能： 任何功能
輸出數(shù)： 4
頻率 - 開關(guān)： 300kHz
電壓/電流 - 輸出 1： 控制器
電壓/電流 - 輸出 2： 控制器
電壓/電流 - 輸出 3： 控制器
帶 LED 驅(qū)動(dòng)器： 無
帶監(jiān)控器： 無
帶序列發(fā)生器： 無
電源電壓： 4.75 V ~ 5.25 V
工作溫度： 0°C ~ 70°C
安裝類型： *
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： *
包裝： 帶卷 (TR)
7
FN4837.5
October 16, 2006
1. The maximum r
DS(ON)
 at the highest junction temperature.
2. The minimum I
OCSET
 from the specification table.
3. Determine I
PEAK
 for I
PEAK
 > I
OUT(MAX)
 + (I)/2, where
I is the output inductor ripple current.
For an equation for the ripple current see the section under
component guidelines titled Output Inductor Selection.
Output Voltage Selection
The output voltage of the PWM converter can be
resistor-programmed to any level between V
IN
 and 0.8V.
However, since the value of R
S1
 is affecting the values of
the rest of the compensation components, it is advisable its
value is kept between 2k& and 5k&.
All linear regulators output voltages are set by means of
external resistor dividers as shown in Figure 4. The two
resistors used to set the voltage on each of the three linear
regulators have to meet the following criteria: their value
while in a parallel connection has to be less than 5k&, or
otherwise said, the following relationship has to be met:
There may be a second restriction on the size of the
resistors used to set the linear regulators output voltage
based on ACPI functionality. Read the ACPI
Implementation section under Application Guidelines to
see if this additional constraint concerns your application. To
ensure the parallel combination of the feedback resistors
equals a certain chosen value, R
FB
, use the following
equations:
, where
V
OUT
 - the desired output voltage,
V
FB
 - feedback (reference) voltage, 0.8V.
Application Guidelines
Soft-Start Interval
The soft-start function controls the output voltages rate of rise
to limit the current surge at start-up. The soft-start function is
integrated on the chip and the soft-start interval is thus fixed.
Layout Considerations
MOSFETs switch very fast and efficiently. The speed with
which the current transitions from one device to another
causes voltage spikes across the interconnecting
impedances and parasitic circuit elements. The voltage
spikes can degrade efficiency, radiate noise into the circuit,
and lead to device overvoltage stress. Careful component
layout and printed circuit design minimizes the voltage
spikes in the converter. Consider, as an example, the
turn-off transition of the upper PWM MOSFET. Prior to
turn-off, the upper MOSFET was carrying the full load
current. During the turn-off, current stops flowing in the
upper MOSFET and is picked up by the lower MOSFET or
Schottky diode. Any inductance in the switched current
path generates a large voltage spike during the switching
interval. Careful component selection, tight layout of the
critical components, and short, wide circuit traces minimize
the magnitude of voltage spikes. See the Application Note
AN9908 for evaluation board drawings of the component
placement and printed circuit board.
There are two sets of critical components in a DC/DC
converter using a HIP6521 controller. The switching power
components are the most critical because they switch large
amounts of energy, and as such, they tend to generate
UGATE
OCSET
PHASE
OCC
+
-
GATE
CONTROL
VCC
OC
40?/SPAN>A
V
DS(ON)
i
D
V
SET
R
OCSET
V
IN
 = +5V
OVERCURRENT TRIP:
I
OCSET
+
+
FIGURE 3. OVERCURRENT DETECTION
PWM
DRIVE
i
D
r
DS ON
(    )
?/DIV>
I
OCSET
R
OCSET
?/DIV>
>
V
DS
V
SET
>
V
PHASE
V
IN
V
DS

=
V
OCSET
V
IN
V
SET

=
DRIVE3
FB3
FB4
C
OUT4
C
OUT3
Q4
HIP6521
V
OUT3
V
OUT4
Q5
+3.3V
IN
DRIVE4
R
S3
R
P3
R
S4
R
P4
V
OUT
0.8    1
R
S
R
P
------- -
+
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
=
FIGURE 4. ADJUSTING THE OUTPUT VOLTAGE OF ANY OF
THE FOUR REGULATORS (OUTPUTS 3 AND 4
PICTURED)
+
+
R
S
R
P
?/DIV>
R
S
R
P
+
--------------------- -   5k&
<
R
S
V
OUT
V
FB
--------------- -   R
FB
?/DIV>
=
R
P
R
S
V
FB
?/DIV>
V
OUT
V
FB

-------------------------------- -
=
HIP6521
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HIP6521CBZ 功能描述:電壓模式 PWM 控制器 4 IN 1 PWM/LINEAR CNTRLR 5V RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
HIP6521CBZA 功能描述:IC REG QD BCK/LINEAR 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 拓?fù)?降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動(dòng)器:無 帶監(jiān)控器:無 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
HIP6521CBZA-T 功能描述:IC REG QD BCK/LINEAR 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 拓?fù)?降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動(dòng)器:無 帶監(jiān)控器:無 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
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