MIC2544/2548

Micrel

MIC2544/2548

2

June 2000

Pin Configuration

1

2

3

4

8

7

6

5

OUT

IN

OUT

NC

EN

FLG

GND

ILIM

MIC2544/2548

8-Pin SOP (M)

Ordering Information

Part Number

Enable

Latch*

Temperature Range

Package

MIC2544-1BM

Active High

–40

°C to +85°C

8-pin SOP

MIC2544-1BMM

Active High

–40

°C to +85°C

8-pin MSOP

MIC2544-2BM

Active Low

–40

°C to +85°C

8-pin SOP

MIC2544-2BMM

Active Low

–40

°C to +85°C

8-pin MSOP

MIC2548-1BM

Active High

•–40

°C to +85°C

8-pin SOP

MIC2548-1BMM

Active High

•–40

°C to +85°C

8-pin MSOP

MIC2548-2BM

Active Low

•–40

°C to +85°C

8-pin SOP

MIC2548-2BMM

Active Low

•–40

°C to +85°C

8-pin MSOP

* Thermal Shutdown Latch

Pin Description

Pin Number

Pin Number

Pin Name

Pin Function

MSOP-8

SOP-8

1

1

EN

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.

2

2

FLG

Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent or

thermal shutdown conditions.

MIC2548 only: latched low on thermal shutdown.

3

3

GND

Ground

5

4

ILIM

Current Limit: Sets current-limit threshold using an external resistor, R

connected to ground. 154

Ω < R

7

7

IN

Input: Output MOSFET drain. Also powers internal circuitry.

6,8

6,8

OUT

Switch (Output): Output MOSFET source. Pins 6 and 8 must be externally

connected.

4

5

NC

Not internally connected

1

2

3

4

8

7

6

5

OUT

IN

OUT

ILIM

EN

FLG

GND

NC

MIC2544/2548

8-Pin MSOP (MM)

LOGIC,

CHARGE

PUMP

(OUT)

(IN)

(EN)

(FLG)

(GND)

(ILIM)

MIC2544/2548

NOTE: PINS 4 AND 5

FOR SOIC AND MSOP

ARE DIFFERENT.