MIC2111B datasheet(4/35 Pages) MICREL

Part #	MIC2111B

Description	High-Performance, Multi-Mode, Step-Down Controller

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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Micrel, Inc.

MIC2111B

October 13, 2015

4

Revision 2.1

Pin Description (Continued)

Pin Number

I/O

Pin Name

9

I/O

LS

Low-Side Logic Output. Connect this pin to module-mode pin for outside audio operation.

Leave this pin open if outside audio (>25kHz) operation is not required. Current limit can be

adjusted by connecting a resistor from LS to AGND (see Table 1 for details).

10

O

HS

High-Side Logic of Power Module Top FET. Connect this pin to the PWM pin of power module.

This pin has tri-state capability.

11

P

VCC

5V Supply Input

. A 1μF ceramic capacitor from VCC to AGND is required for decoupling.

12

P

AGND

Analog Ground.

13

I

ISEN

−

Negative pin of the inductor current-sense input.

14

I

ISEN+

Positive pin of the inductor current-sense input.

15

I/O

FAULTb

Bi-Directional Pin. This pin goes low if controller or module is not ready. This pin goes low if

VCC is less than UVLO, or if a TJ or OVP fault is triggered. Either VCC cycling or EN cycling is

required to clear the fault. This pin has an internal 100k

Ω pull-up resistor to VCC

16

I

RS+

The non-inverting input of the remote sensing amplifier. Remote sense for output voltage.

17

I

RS-

The inverting input of the remote sensing amplifier. Remote sense for GND.

18

O

VDIFF

Output of differential amplifier. Connect a resistor divider from VDIFF to set output voltage

19

I

FB

The inverting input of the error amplifier.

20

I/O

COMP

Transconductance Amplifier Output. Connect compensation network from COMP node for

frequency response.

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