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MIC2536-2BM 参数 Datasheet PDF下载

MIC2536-2BM图片预览
型号: MIC2536-2BM
PDF下载: 下载PDF文件 查看货源
内容描述: 双USB电源分配开关最终信息 [Dual USB Power Distribution Switch Final Information]
分类和应用: 开关光电二极管
文件页数/大小: 13 页 / 115 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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MIC2536
Micrel
MIC2536
Dual USB Power Distribution Switch
Final Information
General Description
The MIC2536 is a cost-effective high-side power switch, with
two independently controlled channels, optimized for bus-
powered Universal Serial Bus (USB) applications. Few exter-
nal components are necessary to satisfy USB requirements.
Each switch channel of the MIC2536 will supply up to 100mA
as required for USB bus-powered downstream devices. Fault
current is limited to typically 275mA by fast-acting current-
limit circuitry which minimizes voltage droop on the upstream
port during fault conditions. A flag output with transient filter
indicates fault conditions to the local USB controller but will
ignore short flag signals resulting from inrush current during
hot plug-in events.
Soft start eliminates the momentary voltage droop on other
ports that may occur when the switch is enabled in bus-
powered applications. Additional features include thermal
shutdown to prevent catastrophic switch failure from high-
current loads and 3.3V and 5V logic compatible enable
inputs.
The MIC2536 is available in active-high and active-low ver-
sions in 8-lead SOP and MSOP.
Features
Compliant to USB specifications
2.7V to 5.5V operating range
150mA minimum continuous load current per channel
400mΩ typical on-resistance
Fast-acting short circuit protection with
thermal shutdown
Integrated filter eliminates
false overcurrent flag assertions
Individual open-drain fault flag pins with transient filter
3V/5V-compatible enable inputs
Active-high (-1) and active-low (-2) versions
Reverse-current blocking in off mode (no “body diode”)
Soft-start circuit
100µA maximum on-state supply current
<1µA typical off-state supply current
–40°C to 85°C operation
USB keyboard bus-powered hubs
USB bus-powered docking stations
Note Book PCs
PDAs
General purpose power distribution applications
PC board hot swap
Inrush current-limiting
Applications
Typical Application
10k
4.50V to 5.25V
Upstream V
BUS
100mA max.
V
BUS
D+
D–
GND
4.7µF
1.5k
MIC5207-3.3
IN
OUT
GND
1µF
10k
3.3V USB Controller
VIN
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
MIC2536-2
ENA
FLGA
FLGB
ENB
OUTA
IN
GND
OUTB
63µF
0.1µF
Ferrite
Beads
V
BUS
D+
.01µF
D–
GND
USB
Port 1
V
BUS
D+
.01µF
63µF
D–
GND
Data
(Two Pair)
to USB
Controller
USB
Port 2
Data
Typical Two-Port Bus-Powered Hub
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
March 2000
1
MIC2536