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參數(shù)資料
| 型號： | MIC2529 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Single-Channel USB Power Controller Advance Information |
| 中文描述： | 單通道USB電源控制器進(jìn)展信息 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 138K |
| 代理商： | MIC2529 |
June 1999
1
MIC2529
MIC2529
Micrel
MIC2529
Single-Channel USB Power Controller
Advance Information
General Description
The MIC2529 is a high-side power switch optimized for self-
powered (individual port switching) and bus-powered (ganged
port switching) Universal Serial Bus (USB) hub applications.
An on-board voltage regulator provides the 3.3V supply
voltage needed for many USB microcontrollers reducing
board component count.
The MIC2529 satisfies the following USB requirements: it
supplies up to 500mA as required by USB downstream
devices; the switch’s low on-resistance meets USB voltage
drop requirements; fault current is limited to typically 750mA,
well below the UL 25VA safety requirement; and a flag output
is available to indicate fault conditions to the local USB
controller. Soft start eliminates the momentary voltage drop
on the upstream port that may occur when the switch is
enabled in bus-powered applications.
A low-dropout (LDO) regulator provides 3.3V at loads up to
100mA and includes an enable pin for low current shutdown.
Both enable inputs are compatible with 3.3V and 5V logic.
Thermal shutdown prevents catastrophic failure from high-
current loads.
The MIC2529 is available in an 8-pin SOIC package with
active-high or active-low enable circuitry on switch.
Typical Applications
ON/OFF
OVERCURRENT
D–
D+
GND
MIC2529
3.3V USB Controller
V
BUS
D+
D–
GND
V
BUS
D+
D–
GND
33μF
Ferrite
Bead
V+
EN
FLG
3VEN
GND
IN
OUT
OUT
3VOUT
Bold
lines indicate
0.1" wide, 1-oz. copper
high-current traces.
Downstream
USB
Port 1
100mA max.
Downstream
USB
Port 2
100mA max.
33μF
V
BUS
D+
D–
GND
V
BUS
D+
D–
GND
33μF
Downstream
USB
Port 3
100mA max.
Downstream
USB
Port 4
100mA max.
33μF
0.01μF
0.01μF
0.01μF
0.01μF
0.1
μF
1μF
8
3
1
2
6
7
5
4
1.5k*
5%
4.7
μF
* Speed sense termination resistor. Must be connected
between V
3VOUT
and D+ to indicate high speed operation.
33μF tantalum or 100μF electrolytics are recommended.
Upstream V
BUS
D+
D–
GND
10k
0.1μF
10k
4.40V to 5.25V
4-Port Ganged Bus-Powered Hub
Features
Compliant to USB specifications
UL Recognized Component
On-board 3.3V, 100mA low-dropout regulator
500mA minimum continuous switch load current
160m
maximum on-resistance
750mA typical current limit
Open-drain fault flag pin for switch
Output can be forced higher than input (off-state)
Thermal shutdown
1ms turn-on (soft-start) and fast turnoff
Available with active-high or active-low switch enable
Active-high enable on 3.3V regulated output
8-pin SOIC package
Applications
USB self-powered hubs
USB bus-powered hubs
USB keyboard hubs
UL Recognized Component
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| MIC2536-1BM | 功能描述:IC USB SWITCH DUAL 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電源分配開關(guān) 系列:- 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類型:高端開關(guān) 輸出數(shù):2 Rds（開）:140 毫歐 內(nèi)部開關(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 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱:1016-1691-6 |
| MIC2536-1BM TR | 功能描述:IC USB SWITCH DUAL 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電源分配開關(guān) 系列:- 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類型:高端開關(guān) 輸出數(shù):2 Rds（開）:140 毫歐 內(nèi)部開關(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 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱:1016-1691-6 |
| MIC2536-1BMM | 功能描述:IC USB SWITCH DUAL 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源分配開關(guān) 系列:- 特色產(chǎn)品:XRP252 Switches 標(biāo)準(zhǔn)包裝:1 系列:- 類型:高端開關(guān) 輸出數(shù):2 Rds（開）:140 毫歐 內(nèi)部開關(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 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱:1016-1691-6 |
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