Datasheet

Pin Description

PIN NAME FUNCTION

1 GND Analog Ground. Connect to PG and AGND.

2FB

Voltage Feedback Input. Connect FB to the center of an external feedback network between OUTS

and GND (see the Setting the Output Voltage section). FB regulates to 1.015V (typ).

3ON

Active-High Enable Input. Connect ON to BATT or logic high for normal operation. Connect ON to

GND or logic low for True Shutdown mode.

4, 5 BATT

Supply Voltage Input. Connect to the battery or a supply from 1.5V to 5.5V. Connect two 22µF

ceramic capacitors from BATT to PG.

6, 7 POUT

Power Output. Connect two 22µF ceramic capacitors from POUT to PG (see the Capacitor Selection

section).

8, 9 LX Inductor Connection. LX is high impedance in shutdown.

10, 11 PG Power Ground. Connect to GND and AGND.

12 AGND Analog Ground. Connect to GND and PG.

13 ILIM

n-Channel Current-Limit Control. For the maximum current limit of 3.5A, connect ILIM to GND. For

lower current-limit settings, connect ILIM to a resistor-divider from POUT to GND (see the Setting the

Current Limit section).

14 OUTS IC Power Input. Supplied from the output. Connect OUTS to POUT.

—EP

Exposed Pad. Connect EP to GND. This does not remove the requirement for a proper ground

connection to GND.

MAX8627

Low V

BATT

, 20µA IQ, 1MHz Synchronous

Boost Converter with True Shutdown

Maxim Integrated