MIC2544 Datasheet, PDF (2/12 Pages) Micrel Semiconductor – Programmable Current Limit High-Side Switch Preliminary Information

MIC2544/2548
Ordering Information
Part Number
Enable
MIC2544-1BM Active High
MIC2544-1BMM Active High
MIC2544-2BM Active Low
MIC2544-2BMM Active Low
MIC2548-1BM Active High
MIC2548-1BMM Active High
MIC2548-2BM Active Low
MIC2548-2BMM Active Low
* Thermal Shutdown Latch
Latch*
•
•
•
•
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
8-pin SOP
8-pin MSOP
8-pin SOP
8-pin MSOP
8-pin SOP
8-pin MSOP
8-pin SOP
8-pin MSOP
Micrel
Pin Configuration
MIC2544/2548
EN 1
8 OUT
FLG 2
7 IN
GND 3
6 OUT
ILIM 4
5 NC
MIC2544/2548
EN 1
8 OUT
FLG 2
7 IN
GND 3
6 OUT
NC 4
5 ILIM
8-Pin SOP (M)
8-Pin MSOP (MM)
MIC2544/2548
(EN)
(FLG)
LOGIC,
CHARGE
PUMP
(OUT)
(IN)
NOTE: PINS 4 AND 5
FOR SOIC AND MSOP
ARE DIFFERENT.
(ILIM) (GND)
Pin Description
Pin Number
MSOP-8
1
Pin Number
SOP-8
1
2
2
3
3
5
4
7
7
6,8
6,8
4
5
Pin Name
EN
FLG
GND
ILIM
IN
OUT
NC
Pin Function
Enable (Input): Logic-compatible enable input. Active-high (-1) or active-low
(-2). High input >1.7V typical; low input <1.5V typical. Do not float.
MIC2548 only: Also resets thermal shutdown latch.
Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent or
thermal shutdown conditions.
MIC2548 only: latched low on thermal shutdown.
Ground
Current Limit: Sets current-limit threshold using an external resistor, R_SET,
connected to ground. 154Ω < R_SET < 2.29kΩ.
Input: Output MOSFET drain. Also powers internal circuitry.
Switch (Output): Output MOSFET source. Pins 6 and 8 must be externally
connected.
Not internally connected
MIC2544/2548
2
June 2000