PGND/EP

Connect to AGND

5

AGND

6

AGND

3

SYNC

1

VIN

2

VIN

4

EN

7

FB

SS

9

SH

10

VOUT

11

VOUT

8

LMZ22010

www.ti.com

SNVS687H – MARCH 2011 – REVISED AUGUST 2015

5 Pin Configuration and Functions

NDY Package

11-Pin

Top View

Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NO.

AGND

5

Ground

Analog Ground — Reference point for all stated voltages. Must be externally connected to

PGND(EP).

6

EN

4

Analog

Enable — Input to the precision enable comparator. Rising threshold is 1.274 V typical. Once the

module is enabled, a 13-µA source current is internally activated to facilitate programmable

hysteresis.

FB

7

Analog

Feedback — Internally connected to the regulation amplifier and overvoltage comparator. The

regulation reference point is 0.795 V at this input pin. Connect the feedback resistor divider

between VOUT and AGND to set the output voltage.

PGND

—

Ground

Exposed Pad / Power Ground — Electrical path for the power circuits within the module. PGND is

not internally connected to AGND (pin 5,6). Must be electrically connected to pins 5 and 6 external

to the package. The exposed pad is also used to dissipate heat from the package during

operation. Use one hundred thermal vias from top to bottom copper for best thermal performance.

SH

9

Analog

Share — Connect this pin to the share pin of other LMZ22010 modules to share the load between

the devices. One device must be configured as the master by connecting FB normally. All other

devices must be configured as slaves by leaving their respective FB pins floating. Leave SH

floating if current sharing is not used. Do Not Ground. See Design Steps for the LMZ22010

Application section.

SS

8

Analog

Soft-Start/Track Input — To extend the 1.6-ms internal soft-start connect an external soft-start

capacitor. For tracking connect to an external resistive divider connected to a higher priority supply

rail. See Design Steps for the LMZ22010 Application section.

SYNC

3

Analog

Synchronization — Apply a CMOS logic level square wave whose frequency is between 314 kHz

and 600 kHz to synchronize the PWM operating frequency to an external frequency source. When

not using synchronization this pin must be tied to ground. The module free-running PWM

frequency is 359 kHz (typical).

VIN

1

Power

Input supply — Nominal operating range is 6 V to 20 V. A small amount of internal capacitance is

contained within the package assembly. Additional external input capacitance is required between

2

this pin and the exposed pad (PGND).

VOUT

10

Power

Output Voltage — Output from the internal inductor. Connect the output capacitor between this pin

and exposed pad (PGND).

11

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