Micrel MIC2027 2077 Quad USB Power Distribution Switch Data Sheet
Summary
These quad high-side MOSFET switches are optimized for reliable general-purpose power distribution in demanding electronics, such as USB peripherals, notebooks, and PDAs. Featuring advanced protective capabilities including overcurrent limiting, thermal shutdown, and soft-start circuitry, the MIC2027/MIC2077 ensures stable power management. The comprehensive manual provides detailed technical specifications, operational guidelines, pin configurations, and application data necessary for engineers designing next-generation portable and computing devices.
Page 1 Text Content
MIC2027/2077 查询MIC2027供应商 Micrel
MIC2027/2077 Quad USB Power Distribution Switch Preliminary Information
General Description Features The MIC2027 and MIC2077 are quad high-side MOSFET 140mΩ maximum on-resistance per channel switches optimized for general-purpose power distribution 2.7V to 5.5V operating range requiring circuit protection. The MIC2027/77 are internally 500m A minimum continuous current per channel current limited and have thermal shutdown that protects the Short-circuit protection with thermal shutdown device and load. Thermally isolated channels
Fault status flag with 3ms filter
The MIC2077 offers “smart” thermal shutdown that reduces
eliminates false assertions
current consumption in fault modes. When a thermal shut-
Undervoltage lockout
down fault occurs, the output is latched off until the faulty load
Reverse current flow blocking (no “body diode”)
is removed. Removing the load or toggling the enable input
Circuit breaker mode (MIC2077)
will reset the device output.
reduces power consumption
Both devices employ soft-start circuitry that minimizes inrush
Logic-compatible inputs
current in applications where highly capacitive loads are
Soft-start circuit
employed.
Low quiescent current
A fault status output flag is asserted during overcurrent and
Pin-compatible with MIC2524 and MIC2527
thermal shutdown conditions. Transient current limit faults are internally filtered.
Applications
The MIC2027/77 is available in narrow (150 mil) and wide
(300 mil) SOP (small outline packages). USB peripherals General purpose power switching ACPI power distribution Notebook PCs PDAs PC card hot swap
Typical Application
5V ± 3% Ferrite Bead
10k VBUS
MIC5203-3.3 D+ Downstream
LDO Regulator MIC20273.3V USB Controller USB
Port 1
IN OUT V+ ON/OFF ENA IN 500m A max.
1µF OVERCURRENT FLGA IN
GND 0.1
µF ENB OUTA
µF VBUS
FLGB OUTB
D+ Downstream
ENC OUTC 33µF*
OUTDFLGC Port 2 D– GND 500m A max.
END GND FLGD GND
Bold lines indicate VBUS
0.1" wide, 1-oz. copper Downstream
high-current traces. 33µF*
Port 3 GND 500m A max.
* 33µF, 16V tantalum or 100µF, 10V electrolytic per port
D+ Downstream
Port 4 GND 500m A max.
4-Port Self-Powered Hub
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com June 2000 MIC2027/2077
Page Summary Contents For Micrel MIC2027 2077 Quad USB Power Distribution Switch Data Sheet
Manual Details
| Brand | QUAD |
|---|---|
| Pages | 16 |
| File Size | 508.88 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What is the operating voltage range for this device?
The operational supply voltage ranges from +2.7V to +5.5V.
Does the MIC2077 offer advanced shutdown protections?
Yes, the MIC2077 provides 'smart' thermal shutdown, including circuit breaker mode, which allows the output to reset when removing a load or toggling the enable input without power depletion.
What maximum continuous current can each channel handle?
Each channel is limited to a minimum continuous current of 500mA.
What packages are available for the MIC2027/2077?
The device is available in narrow (150 mil) and wide (300 mil) Small Outline Packages (SOP).