MIC2073 Datasheet, PDF (1/16 Pages) Micrel Semiconductor – Dual-Channel Power Distribution Switch

MIC2073/2074
Dual-Channel Power Distribution Switch
General Description
Features
The MIC2073/2074 are high-side MOSFET switches
optimized for general-purpose power distribution requiring
circuit protection.
The MIC2073/2074 are internally current limited and have
thermal shutdown for protecting the device and load.
The MIC2074 offers “smart” shutdown that reduces current
consumption in fault mode. When a fault occurs due to
thermal shutdown, the output is latched off. The
MIC2074s’ output will be reset, enabling the output, either
by removing the load or toggling the ENABLE pin.
Both devices employ soft-start circuitry that minimizes
inrush current in applications where highly capacitive loads
are employed.
A fault status output flag is asserted during overcurrent or
thermal shutdown conditions. Transient faults are internally
filtered.
The MIC2073/2074 are available in an 8-pin SOIC.
• 115 mΩ typical RB_DS(ON) at 5.0 V
• 210 mΩ maximum RB_DS(ON) at 5.0 V
• 2.7 V to 5.5 V operating range
• 500 mA minimum continuous current per channel
• Short circuit protection with thermal shutdown
• Thermally isolated channels
• Fault status flag (FLGA/B) separate for each channel
• 3ms fault flag delay (T_D) eliminates false assertions
• UVLO (Undervoltage Lockout)
• Reverse current flow blocking (no “body diode”)
• Circuit breaker mode (MIC2074)
• Logic-compatible inputs
• Soft-start circuit
• Low quiescent current
• Pin compatible with the MIC2026/2076
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Applications
• USB peripherals
• General purpose power switching
• ACPI power distribution
• Notebook PCs
• PDAs
• PC card hot swap
_________________________________________________________________________________________________
Typical Application
V_CONT.
10k
V_CC
2.7V to 5.5V
10k
Logic Controller
VIN
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
MIC2073/74
ENA
FLGA
FLGB
ENB
OUTA
IN
GND
OUTB
Load
0.1µF
Load
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
January 2009
M9999-011209