- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1948 > MC33394DH (Freescale Semiconductor)IC POWER SUPPLY MULT-OUT 44-HSOP PDF資料下載
參數(shù)資料
| 型號： | MC33394DH |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 26/44頁 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY MULT-OUT 44-HSOP |
| 標準包裝： | 30 |
| 應(yīng)用： | Motorola MPC55x、MPC56x 微處理器 |
| 接口： | SPI 串行 |
| 電源電壓： | 4 V ~ 26.5 V |
| 封裝/外殼： | 44-BSSOP（0.433"，11.00mm 寬）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 44-HSOP |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁當(dāng)前第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
33394
32
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
Table 2.
Part number
(Figure 18)
Application diagram
part number (Figure 1)
Component value
R1
33394 internal resistor
39.6k
R2
100k
R3
R1
430
C1
C6
100pF
C2
C7
1.0nF
C3
C5
3.3nF
5.3. Selecting Pull–Up Resistors
All the Resets (/PORESET, /PRERESET and /HRESET)
are open drain outputs, which can sink a maximum of 1 mA
drain current. This determines the pull–up resistor minimum
value. VKAM should be used as the pull–up source for the
/PORESET output. /PORESET is pulled low only during
initial battery connect or when VKAM is below 2.5 volts (for
VDDL = 2.6 V).
To select the /PRERESET and /HRESET pull–up resistor
connections, consider current draw during sleep modes. For
example, the pull up resistor on /PRERESET and /HRESET
should receive its source from VDDL, if the sleep mode or low
power mode of the module is initiated primarily by the state of
the VIGN pin. Refer to Figure 20 for recommended pull–up
resistor values.
Another way to connect the /PRERESET and /HRESET
pull–up resistors is to connect them to the VKAM output
together with the /PORESET pull–up resistor (see Figure 1).
This is the preferable solution when the sleep or low power
mode is initiated primarily by the microprocessor. In that
case, when the 33394 is shut down by pulling the /SLEEP pin
down, all three Resets (/PORESET, /PRERESET and
/HRESET) stay high. Since they are pulled–up to the supply
voltage (VKAM) they draw no current from the VKAM and the
module quiescent current is minimized.
5.4. Selecting Hardware Reset Timer Components
The HRT input sets the delay time from VDDH, VDD3_3
and VDDL stable to the release of /PRERESET and
/HRESET. When sizing the delay time the module design
engineer must consider capacitor leakage, printed board
leakage and HRT pin leakage. Resistor selection should be
low enough to make the leakage currents negligible. The
Hardware Reset (/HRESET) delay can be calculated as
follows:
Delay time:
tD +* RC
ln[
(VB * VSAT) * Vth
(VB * VSAT)
]
Where R is the HRT timer pull–up resistor,
C is the HRT timer capacitor
VB is the pull–up voltage,
Vth is the HRT timer threshold voltage (Vth = 2.5V
nominal value),
VSAT is the saturation voltage of the internal pull–down
transistor.
If the HRT timer pull–up resistor is connected to VDDH
(see Figure 1) and the resistor value is
≥ 47 kW, therefore the
VSAT can be neglected, the formula for calculating the time
delay can be simplified to:
tD + 0.7
RC
5.5. Selecting the VKAM Resistor Divider
The VKAM linear regulator output voltage is divided by an
external resistor divider and compared with the bandgap
reference voltage (Vbg) in the input of the VKAM error
amplifier. The resistor divider can be designed according to
the following formula:
VKAM + VKAMref
1
)
Rupper
Rlower
VKAMref = 1.267 V
Where VKAMref is the bandgap reference voltage.
Since the VKAM feedback pin (VKAM_FB) input current is
only a few nA, the resistor value can be selected sufficiently
high in order to minimize the quiescent current of the module.
See Figure 20 for the VKAM resistor divider recommended
values.
5.6. Selecting the VDDL Resistor Divider
The VDDL regulator resistor divider is designed according
to the same formula as described in the paragraph above
(see Figure 20).
VDDL + VDDLref
1
)
Rupper
Rlower
Where VDDLref = 1.267 V
Nonetheless, the actual resistor values should be chosen
several decades lower than in the previous example. This is
due to the fact that the VDDL linear regulator needs to be
pre–loaded by a minimum of 10 mA current in order to
guarantee stable operation. See Figure 20 for the VDDL
resistor divider recommended values.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC33560DW | OC PWR MGMT READERS/CPLR 24-SOIC |
| MC33689DDWBR2 | IC SYSTEM BASE W/LIN 32-SOIC |
| MC33742EPR2 | IC SYSTEM BASE W/CAN 48-QFN |
| MC33780EG | IC DBUS MASTER DUAL DIFF 16-SOIC |
| MC33790DW | IC DSI 2-CHAN INTERFACE 16-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33395DWB | 功能描述:馬達/運動/點火控制器和驅(qū)動器 TPD RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MC33395DWBR2 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 TPD RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MC33395EW | 功能描述:馬達/運動/點火控制器和驅(qū)動器 TPD - THREE PHASE DRIVER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MC33395EWR2 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 TPD - THREE PHASE DRIVER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MC33395TDWB | 功能描述:馬達/運動/點火控制器和驅(qū)動器 TPDT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。