Connection Diagrams

micro SMD package

20007104

TOP VIEW

20007105

BOTTOM VIEW

Ordering Information

Order Number

Package Type

NSC Package

Drawing

Supplied As

10-Pin micro SMD

LM2612ABP

10-bump Wafer Level Chip Scale

(micro SMD)

BPA10VWB

250 Units, Tape and Reel

LM2612BBP

250 Units, Tape and Reel

LM2612ABPX

3000 Units, Tape and Reel

LM2612BBPX

3000 Units, Tape and Reel

Pin Description

Pin Number(*)

Pin Name

Function

A1

FB

Feedback Analog Input. Connect to the output at the output filter capacitor (Figure 1)

B1

VID1

Output Voltage Control Inputs. Set the output voltage using these digital inputs (see Table

1). The output defaults to 1.5V if these pins are unconnected.

C1

VID0

D1

SYNC/MODE

Synchronization Input. Use this digital input for frequency selection or modulation control.

Set:

SYNC/MODE = high for low-noise 600kHz PWM mode

SYNC/MODE = low for low-current PFM mode

SYNC/MODE = a 500kHz - 1MHz external clock for synchronization to an external clock in

PWM mode. See

Synchronization and Operating Modes in the Device Information section.

D2

EN

Enable Input. Set this CMOS Schmitt trigger digital input high to VDD for normal

operation. For shutdown, set low to SGND. Set EN low during power-up and other low

supply voltage conditions. (See

Shutdown Mode in the Device Information section.)

D3

PGND

Power Ground

C3

SW

Switching Node connection to the internal PFET switch and NFET synchronous rectifier.

Connect to an inductor with a saturation current rating that exceeds the 850mA max

Switch Peak Current Limit specification of the LM2612 (

Figure 1)

B3

PVIN

Power Supply Input to the internal PFET switch. Connect to the input filter capacitor

(

Figure 1).

A3

VDD

Analog Supply Input. If board layout is not optimum, an optional 0.1µF ceramic capacitor

is suggested (

Figure 1)

A2

SGND

Analog and Control Ground

(*) note the pin numbering scheme for the MicroSMD package was revised in April, 2002 to comform to JEDEC standard. Only the pin numbers were revised. No

changes to the physical location of the inputs/outputs were made. For reference purpose, the obsolete numbering has FB as pin 1, VID1 as pin 2, VID0 as pin3,

SYNC as pin 4, EN as pin 5, PGND as pin 6, SW as pin 7, PVIN as pin 8, VDD as pin 9 and SGND as pin 10.

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