Low-Power, 1%-Accurate Battery

Monitors in µDFN and SC70 Packages

8

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Selector Guide

PART

LBO OUTPUT

OUTPUT TYPE

HYSTERESIS

PIN-PACKAGE

MAX6775XK_+T

Single

Push-Pull

Fixed

5 SC70-5

MAX6775LT_+T

Single

Push-Pull

Fixed

6 µDFN-6

MAX6776XK_+T

Single

Open-Drain

Fixed

5 SC70-5

MAX6776LT_+T

Single

Open-Drain

Fixed

6 µDFN-6

MAX6777XK+T

Single

Push-Pull

Adjustable

5 SC70-5

MAX6777LT+T

Single

Push-Pull

Adjustable

6 µDFN-6

MAX6778XK+T

Single

Open-Drain

Adjustable

5 SC70-5

MAX6778LT+T

Single

Open-Drain

Adjustable

6 µDFN-6

MAX6779LT_+T

Dual

Push-Pull

Fixed

6 µDFN-6

MAX6780LT_+T

Dual

Open-Drain

Fixed

6 µDFN-6

MAX6781LT_+T

Dual

Mixed

Fixed

6 µDFN-6

Calculating an External

Hysteresis Resistive Divider

Setting the hysteresis externally requires calculating

three resistor values, as indicated in Figure 3. First cal-

Monitoring a Battery Voltage Higher

For monitoring higher voltages, supply power to BATT

that is within the specified supply range, and power the

input resistive divider from the high voltage to be moni-

tored. Do not exceed the Absolute Maximum Ratings.

Adding External Capacitance to

Reduce Noise and Transients

If monitoring voltages in a noisy environment, add a

bypass capacitor of 0.1µF from BATT to GND as close

as possible to the device. For systems with large tran-

sients, additional capacitance may be required. A small

capacitor (<1nF) from LBI_ to GND may provide addi-

tional noise immunity.

R

V

I

HYST

HYST

TOTAL

=

I

V

RR

TOTAL

BATT

HL

=

+

0

R

Vx R

VV

L

LBIR

H

LBIR

BATT

0

−

R

ex V

I

H

A

BATT

L

=