PGND/EP

Connect to AGND

5

AGND

6

AGND

3

AGND

1

VIN

2

VIN

4

EN

7

FB

SS

9

NC

10

VOUT

11

VOUT

8

3 x 10 PF

See Table

0.47 PF

(OPT)

See Table

2 x 330 PF

LMZ12010

5V

5.62k

1.07k

7...20V

VOUT RFBT

RFBB

VIN Range

3.3V

3.32k

1.07k

6...20V

2.5V

2.26k

1.07k

6...20V

1.8V

1.87k

1.50k

6...20V

1.5V

1.00k

1.13k

6...20V

1.2V

1.07k

2.05k

6...20V

0.8V

0

4.02k

6...20V

6V

15.4k

2.37k

8.5...20V

1.0V

1.62k

6.49k

6...20V

Enable

LMZ12010

www.ti.com

SNVS667F – FEBRUARY 2010 – REVISED MARCH 2013

Simplified Application Schematic

Connection Diagram

Figure 5. Top View

11-Lead PFM

Pin Descriptions

Pin

Name

Description

1, 2

VIN

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

package assembly. Additional external input capacitance is required between this pin and the exposed pad (PGND).

3, 5, 6

AGND

Analog Ground — Reference point for all stated voltages. Must be externally connected to PGND(EP).

4

EN

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

13 uA source current is internally activated to facilitate programmable hysteresis.

7

FB

Feedback — Internally connected to the regulation amplifier and over-voltage comparator. The regulation reference

point is 0.795V at this input pin. Connect the feedback resistor divider between VOUT and AGND to set the output

voltage.

8

SS

Soft-Start/Track Input — To extend the 1.6 mSec 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 LMZ12010

Application section.

9

NC

No Connect — This pin must remain floating, do not ground.

10, 11

VOUT

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

(PGND).

EP

PGND

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 12 mil thermal vias from top to

bottom copper for best thermal performance.

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