EP53A8LQI/EP53A8HQI

Ordering Information

Part Number

Comment

Package

EP53A8LQI

LOW VID Range

16-pin QFN T&R

EP53A8HQI

HIGH VID Range

16-pin QFN T&R

EVB-EP53A8LQI

EP53A8LQI Evaluation Board

EVB-EP53A8HQI

EP53A8HQI Evaluation Board

Pin Assignments (Top View)

Figure 1: EP53A8LQI Pin Out Diagram (Top View)

Figure 4: EP53A8HQI Pin Out Diagram (Top View) Pin

Description

Pin Description

PIN

NAME

FUNCTION

1, 15,

16

NC(SW)

NO CONNECT – These pins are internally connected to the common switching node of the

internal MOSFETs. NC (SW) pins are not to be electrically connected to any external signal,

ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline

may result in part malfunction or damage to the device.

2,3

PGND

Power ground. Connect this pin to the ground electrode of the Input and output filter

capacitors.

4

VFB

EP53A8LQI: Feed back pin for external divider option.

EP53A8HQI: No Connect

5

VSENSE

Sense pin for preset output voltages. Refer to application section for proper configuration.

6

AGND

Analog ground. This is the quiet ground for the internal control circuitry, and the ground return

for external feedback voltage divider

7, 8

VOUT

Regulated Output Voltage. Refer to application section for proper layout and decoupling.

9, 10,

11

VS2, VS1,

VS0

Output voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11.

EP53A8LQI: Selects one of seven preset output voltages or an external resistor divider.

EP53A8HQI: Selects one of eight preset output voltages.

(Refer to section on output voltage select for more details.)

12

ENABLE

Output Enable. Enable = logic high; Disable = logic low

13

AVIN

Input power supply for the controller circuitry. Connect to PVIN through a 100 Ohm resistor.

14

PVIN

Input Voltage for the MOSFET switches.

03651

September 17, 2013

Rev D