Micrel, Inc.
MIC2546/2547
Pin Description
Pin Number
1
2, 16
3
Pin Name
INA
OUTA
ENA
Pin Function
Input A: Output A MOSFET drain. Also supplies internal circuitry.
Switch A (Output): Output A MOSFET source. Pins 2 and 16 must be externally
connected.
Enable A (Input): Logic-compatible enable input. Active- activelow (–2). High
input >1.7V typical; low input <1.5V typical. MIC2547 only: Also resets thermal
shutdown latch.
Not internally connected.
Fault Flag A (Output): Active-low, open-drain output. Indicates overcurrent or
thermal shutdown conditions. MIC2547 only: latched low on thermal shutdown.
Ground. Both pins must be connected to GND.
Current Limit Channel B: Sets current-limit threshold using an resistor, R
SET
,
connected to ground. 154Ω < R
SET
< 2.29kΩ.
Switch B (Output): Pins 8 and 11 must be externally connected.
Input B
Enable B (Input)
Fault Flag B (Output)
Fault Flag B (Output)
4, 10
5
6, 14
7
8, 11
9
12
13
15
NC
FLGA
GNDB,
GNDA
ILIMB
OUTB
INB
ENB
FLGB
ILIMA
January 2008
3
M9999-012508-A
MICREL [ MICREL SEMICONDUCTOR ]
