MIC2193

Micrel

M9999-042704

2

April 2004

Pin Configuration

1

VIN

COMP

FB

CS

8

OUTP

OUTN

GND

VDD

7

6

5

2

3

4

8 Lead SOIC (M)

Pin Description

Pin Number

Pin Name

Pin Function

1

VIN

Controller supply voltage. Also the (+) input to the current sense amp.

2

COMP

Compensation (Output): Internal error amplifier output. Connect to a

capacitor or series RC network to compensate the regulator’s control loop.

3

FB

Feedback Input: The circuit regulates this pin to 1.245V.

4

CS

The (–) input to the current limit comparator. A built in offset of 110mV

between VIN and CSL in conjunction with the current sense resistor sets the

current limit threshold level. This is also the (–) input to the current amplifier.

5

VDD

3V internal linear-regulator output. VDD is also the supply voltage bus for the

chip. Bypass to GND with 1

µF.

6

GND

Ground.

7

OUTN

High current drive for the synchronous N-channel MOSFET. Voltage swing

is from ground to VIN. On-resistance is typically 6

Ω at 5V

8

OUTP

High current drive for the high side P-channel MOSFET. Voltage swing is

from ground to VIN. On-resistance is typically 6

Ω at 5V

Ordering Information

Part Number

Voltage

Frequency

Temperature Range

Package

Lead Finish

MIC2193BM

Adjustable

400KHz

–40

°C to +125°C

8-lead SOP

Standard

MIC2193YM

Adjustable

400KHz

–40

°C to +125°C

8-lead SOP

Pb-Free