MIC2010 Datasheet, PDF (3/9 Pages) Micrel Semiconductor – USB Power Controller Advance Information

MIC2010
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 or open-
drain. FAULT1 is asserted LOW when channel 1 is in a thermal shutdown
state or overcurrent 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 or open-
drain. FAULT2 is asserted LOW when channel 2 is in a thermal shutdown
state or overcurrent 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.
September 2000
3
MIC2010/2070