音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

MC34701EK Datasheet

  • MC34701EK

  • Freescale Semiconductor, Inc [1.5 A Switch-Mode Power Suppl...

  • FREESCALE

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

FUNCTIONAL DESCRIPTION
FUNCTIONAL DEVICE OPERATION
INVERTED OPERATING MODE
Single 3.3 V Supply, VIN = VIN1 = VIN2 = 3.3 V
Power-Up
The 3.3 V supplies the microprocessor I/O voltage, the
LDO supplies core voltage (e.g., 1.5 V nominal), and the
switcher VOUT operates independently. Power sequencing
depends only on the normal LDO intrinsic operation to control
the Pass MOSFET.
Power-Up
This condition depends upon the regulator current limit,
load current and capacitance, and the relative rise times of
the VIN1 and VIN2 supplies. There are two cases:
1.
VOUT rises faster than LDO.
The switcher VOUT uses
control methods (1) and (2) described in the section
Methods of Control on page 22.
2.
LDO rises faster than VOUT .
The LDO uses control
methods (5) and (6) described in the section
Methods
of Control on page 22.
Power-Down
When VIN is rising, initially LDO is below the regulation
point and the Pass MOSFET is on. In order not to exceed the
2.1 V differential requirement between the I/O (VIN) and the
core (LDO), the LDO must start up at 2.1 V or less and be
able to maintain the 2.1 V or less differential. The maximum
slew rate for V
IN
is 1.0 V/ms.
Power-Down
This condition depends upon the regulator load current
and capacitance and the relative fall times of the VIN1 and
VIN2 supplies. There are two cases:
1.
LDO falls faster than VOUT .
The VOUT uses control
methods (4) and (5) described in the section
Methods
of Control on page 22.
In the case VIN1 = VIN2, the intrinsic operation turns
on both the Buck High-Side MOSFET and the LDO
external Pass MOSFET, and discharges the VOUT
load capacitor into the VIN supply.
2.
VOUT falls faster than LDO.
The LDO uses control
methods (5) and (6) described in the section
Methods
of Control on page 22.
Shorted Load
When VIN is falling, LDO falls below the regulation point;
therefore, the Pass MOSFET is on. In the case where LDO is
falling faster than VIN, the Pass MOSFET attempts to
maintain LDO. In the case where VIN is falling faster than
LDO, the Pass MOSFET is also on, and the LDO load
capacitor is discharged through the Pass MOSFET to VIN.
Thus, provided VIN does not fall too fast, the core voltage
(LDO) does not exceed the I/O voltage (VIN) by more than
maximum of 0.4 V.
Shorted Load
1.
LDO shorted to ground.
This will cause the I/O voltage
to exceed the core voltage by more than 2.1 V. No load
protection.
2.
VIN shorted to ground.
Until the LDO load capacitance
is discharged, the core voltage exceeds the I/O voltage
by more than 0.4 V. By the intrinsic operation of the
LDO, the load capacitor is discharged rapidly through
the Pass MOSFET to VIN.
3.
LDO shorted to supply.
No load protection.
Single 5.0 V Supply, VIN1 = VIN2, or Dual Supply VIN1
鈮?/div>
VIN2
1.
LDO shorted to ground.
The VOUT uses methods (1)
and (2) described in the section
Methods of Control on
page 22.
2.
VOUT shorted to ground.
The LDO uses control
methods (5) and (6) described in the section
Methods
of Control on page 22.
3. VIN1 shorted to ground. Device is not working.
4.
VIN2 shorted to ground.
This is equivalent to the
switcher V
OUT
output shorted to ground.
5.
LDO shorted to supply.
No load protection. 34701 is
protected by current limit and Thermal Shutdown.
6.
VOUT shorted to supply.
No load protection. 34701 is
protected by current limit and Thermal Shutdown.
The switcher VOUT supplies the microprocessor I/O
voltage. The LDO supplies the core (e.g., 1.5 V nominal) (see
Figure 19,
page
22).
34701
Analog Integrated Circuit Device Data
Freescale Semiconductor
25

MC34701EK 產(chǎn)品屬性

  • 42

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 專用型

  • -

  • 轉(zhuǎn)換器，F(xiàn)reescale 電源 QUICC? I，II

  • 2.8 V ~ 6 V

  • 1

  • 可調(diào)

  • -40°C ~ 85°C

  • 表面貼裝

  • 32-SOIC（0.295"，7.50mm 寬）

  • 32-SOIC

  • 管件

  • KIT33701DWBEVB-ND - KIT FOR 33701 POWER SUPPLY

MC34701EK相關(guān)型號(hào)PDF文件下載

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！