MIC9130

Micrel, Inc.

M9999-040805

2

April 2005

Pin Description

Pin Number

Pin Name

Pin Function

1

LINE

Line (Input): 180Vdc maximum supply input. May be floated if unused.

2

VCC

Supply (Input): MIC9130 internal supply input.

3

RBIAS

Bias Resistor (External Component): Connect 562KΩ to ground.

4

OSC

Oscillator RC Network (External Components): Connect external resistor-

capacitor network to set oscillator frequency.

5

SYNC

Synchronization (Input): External oscillator input for slave operation of

controller. See OSC. Do not float.

6

COMP

Compensation (External Components): Error amplifier output for external

compensation network connection.

7

FB

Feedback (Input): Error amplifier inverting input.

8

CPWR

Current Limit Selection (Input): When CPWR is high, an over-current

condition at the ISNS input will terminate the gate drive and reset the

soft-start latch. If the CPWR pin is low, an over-current condition at the ISNS

input will terminate the gate drive signal, but will not cause a reset of the

soft-start circuit.

9

VBIAS

Reference (Output): Internal 5V supply. Will source 5mA maximum.

10

EN

Enable (Input): Logic level enable/shutdown input; logic high = enabled (on),

logic low = shutdown (off).

11

AGND

Analog Ground (Return)

12

SS

Soft-Start (External Components): Connect external capacitor to slowly ramp

up duty cycle during startup and over-current conditions.

13

UVLO

Undervoltage Lockout (External Components): Connect to unbiased resistive

divider network to set controller’s minimum operating voltage. Connect to

VBIAS if not needed.

14

ISNS

Current Sense (Input): Connect between external switching MOSFET source

and switch current sense resistor.

15

PGND

Power Ground (Return)

16

OUT

Switch Drive Output (Output): Connect to gate of external switching

MOSFET.

Pin Configuration

2

VCC

3

RBIAS

4

OSC

5

SYNC

6

COMP

7

FB

1

LINE

8

CPWR

OUT

16

PGND

15

ISNS

14

UVLO

13

SS

12

AGND

11

10

9 VBIAS

EN

16-Pin SOP (M)

16-Pin QSOP (QS)

Ordering Information

Part Number

Max. Duty Cycle Junction Temp. Range

Package

Standard

Pb-Free

MIC9130BM

MIC9130YM

50%

-40°C to +125°C

16-Pin SOP

MIC9130BQS

MIC9130YQS

50%

-40°C to +125°C

16-Pin QSOP