參數(shù)資料
型號(hào)： MIC2075-1BM
廠商： MICREL INC
元件分類(lèi)： 電源管理
英文描述： Circular Connector; No. of Contacts:6; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:10; Circular Contact Gender:Socket; Circular Shell Style:Right Angle Plug; Insert Arrangement:10-6
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： SOIC-8
文件頁(yè)數(shù)： 11/16頁(yè)
文件大?。?/td> 138K
代理商： MIC2075-1BM
March 2000
11
MIC2025/2075
MIC2025/2075
Applications Information
Supply Filtering
A 0.1
μ
F to 1
μ
F bypass capacitor positioned close to V
IN
and
GND of the device is strongly recommended to control supply
transients. Without a bypass capacitor, an output short may
cause sufficient ringing on the input (from supply lead induc-
tance) to damage internal control circuitry.
Printed Circuit Board Hot-Plug
The MIC2025/75 are ideal inrush current-limiters suitable for
hot-plug applications. Due to the integrated charge pump,
the MIC2025/75 presents a high impedance when off and
slowly becomes a low impedance as it turns on. This
“
soft-
start
”
feature effectively isolates power supplies from highly
capacitive loads by reducing inrush current during hot-plug
events. Figure 3 shows how the MIC2075 may be used in a
hot-plug application.
In cases of extremely large capacitive loads (>400
μ
F), the
length of the transient due to inrush current may exceed the
delay provided by the integrated filter. Since this inrush
current exceeds the current-limit delay specification, FLG will
be asserted during this time. To prevent the logic controller
from responding to FLG being asserted, an external RC filter,
as shown in Figure 4, can be used to filter out transient FLG
assertion. The value of the RC time constant will be selected
to match the length of the transient.
Micrel
Universal Serial Bus (USB) Power Distribution
The MIC2025/75 is ideally suited for USB (Universal Serial
Bus) power distribution applications. The USB specification
defines power distribution for USB host systems such as PCs
and USB hubs. Hubs can either be self-powered or bus-
powered (that is, powered from the bus). Figure 5 below
shows a typical USB Host application that may be suited for
mobile PC applications employing USB. The requirements
for USB host systems is that the port must supply a minimum
of 500mA at an output voltage of 5V
±
5%. In addition, the
output power delivered must be limited to below 25VA. Upon
an overcurrent condition, the host must also be notified. To
support hot-plug events, the hub must have a minimum of
120
μ
F of bulk capacitance, preferably low-ESR electrolytic or
tantulum. Refer to Application Note 17 for more details on
designing compliant USB hub and host systems.
For bus-powered hubs, USB requires that each downstream
port be switched on or off under control by the host. Up to four
downstream ports each capable of supplying 100mA at 4.4V
minimum are allowed. In addition, to reduce voltage droop on
the upstream V
BUS
, soft-start is necessary. Although the hub
can consume up to 500mA from the upstream bus the hub
must consume only 100mA max at start-up, until it enumer-
ates with the host prior to requesting more power. The same
requirements apply for bus-powered peripherals that have no
downstream ports. Figure 6 shows a bus-powered hub.
MIC2025-2
EN
OUT
FLG
GND
OUT
NC
IN
1
8
2
7
3
6
5
NC
4
Adaptor Card
to "Hot"
C
BULK
GND
V
CC
0.1
μF
Backend
Function
Figure 3. Hot Plug Application
10k
V+
MIC2025
EN
OUT
FLG
GND
OUT
NC
NC
IN
1
8
2
7
3
6
4
5
OVERCURRENT
Logic Controller
R
C
Figure 4. Transient Filter
相關(guān)PDF資料
PDF描述
MIC2075-1BMM 71-148810-98P
MIC2075-2BM Circular Connector; Body Material:Aluminum; Series:PT08; No. of Contacts:6; Connector Shell Size:10; Connecting Termination:Solder; Circular Shell Style:Right Angle Plug; Circular Contact Gender:Pin; Insert Arrangement:10-98
MIC2075-2BMM Single-Channel Power Distribution Switch Preliminary Information
MIC2025 Single-Channel Power Distribution Switch(應(yīng)用于通用電源分配電路保護(hù)的單通道高邊MOSFET電源分配開(kāi)關(guān))
MIC2025-1BM Single-Channel Power Distribution Switch Preliminary Information
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MIC2075-1BM TR 功能描述:IC DISTRIBUTION SW SGL 8-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源分配開(kāi)關(guān) 系列:MM8™ 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:高端開(kāi)關(guān) 輸出數(shù):2 Rds（開(kāi)）:140 毫歐 內(nèi)部開(kāi)關(guān):是 電流限制:1.15A 輸入電壓:1.75 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱(chēng):1016-1691-6
MIC2075-1BMM 功能描述:IC DISTRIBUTION SW SGL 8-MSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源分配開(kāi)關(guān) 系列:MM8™ 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:高端開(kāi)關(guān) 輸出數(shù):2 Rds（開(kāi)）:140 毫歐 內(nèi)部開(kāi)關(guān):是 電流限制:1.15A 輸入電壓:1.75 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱(chēng):1016-1691-6
MIC2075-1BMM TR 功能描述:IC DISTRIBUTION SW SGL 8-MSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源分配開(kāi)關(guān) 系列:MM8™ 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:高端開(kāi)關(guān) 輸出數(shù):2 Rds（開(kāi)）:140 毫歐 內(nèi)部開(kāi)關(guān):是 電流限制:1.15A 輸入電壓:1.75 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱(chēng):1016-1691-6
MIC2075-1FBM 功能描述:IC DISTRIBUTION SW SGL 8-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源分配開(kāi)關(guān) 系列:MM8™ 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:高端開(kāi)關(guān) 輸出數(shù):2 Rds（開(kāi)）:140 毫歐 內(nèi)部開(kāi)關(guān):是 電流限制:1.15A 輸入電壓:1.75 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱(chēng):1016-1691-6
MIC2075-1FBM TR 功能描述:IC DISTRIBUTION SW SGL 8-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源分配開(kāi)關(guān) 系列:MM8™ 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:高端開(kāi)關(guān) 輸出數(shù):2 Rds（開(kāi)）:140 毫歐 內(nèi)部開(kāi)關(guān):是 電流限制:1.15A 輸入電壓:1.75 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱(chēng):1016-1691-6
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