MIC2010_05 Datasheet, PDF (3/13 Pages) Micrel Semiconductor – USB Power Controller

MIC2010/2070
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9, 10
11, 12
13, 14
15
16
Pin Name
FAULT1
EN1
S3#
RSET1
AUX
NC
RSET2
GND
OUT2
MAIN
OUT1
EN2
FAULT2
Micrel
Pin Function
Fault Status (Output): Channel 1, active-low; weak pull-up to AUX. FAULT1
is asserted LOW when channel 1 is in a thermal shutdown state or overcur-
rent condition for more than 5ms. MIC2070 latches this output in its asserted
state upon overcurrent condition. Toggling EN1 or removing the load will
reset the circuit breaker latch, and deassert FAULT1.
Enable (Input): Channel 1, active-high (–1) or active-low (–2). Toggling this
input also resets the latched output of the MIC2070.
Control (Input): When this input is high, the MAIN inputs are connected to
OUT1 and OUT2 via 100mΩ, 500mA MOSFET switches. When this input is
LOW, the AUX inputs are connected to OUT1 and OUT2 via 500mΩ
MOSFET switches with a current-limit threshold specified by external
resistors, RSET1 and RSET2.
Current-Limt Set Resistor (Input): Channel 1. A resistor connected to this
input sets the current-limit threshold in AUX mode (S3# asserted). The
current-limit threshold is determined by approximately 18/RSET1.
Auxiliary 5V Supply (Input): Also used as power supply for internal circuitry.
No Connection: This pin may be connected to other pins without restriction.
Current-Limit Set Resistor (Input): Channel 2. A resistor connected to this
input sets the current-limit threshold in AUX mode (S3# asserted). The
current-limit threshold is determined by approximately 18/RSET2.
Ground
Channel 2 (Output): Both pins must be connected together externally.
5V Main Supply (Input): All MAIN inputs must be connected together
externally.
Channel 1 (Output): Both pins must be connected together externally.
Enable (Input): Channel 2, active-high (–1) or active-low (–2). Toggling this
input also resets the latched output for the MIC2070.
Fault Status (Output): Channel 2, active-low; weak pull-up to AUX. FAULT2
is asserted LOW when channel 2 is in a thermal shutdown state or overcur-
rent condition for more than 5ms. MIC2070 latches this output in it's asserted
state upon overcurrent condition. Toggling EN2 or removing load will reset
the circuit breaker latch, and deassert FAULT2.
January 2005
3
M9999-101104