LTM4719 datasheet(20/53 Pages) AD

20 / 53 page

Data Sheet

LTM4719

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Rev. 0

20 of 53

driven low whenever the buck converter is disabled. The maximum voltage that can be

applied to the PG pin is 5.5V.

G4, H4

VIN2

Secondary Power Source Input for the Buck Converter. In priority mode (DIODE pin

low), the buck converter will only operate from this input if the priority input power

source is under voltage. This pin must be bypassed with a 4.7μF or larger ceramic

capacitor to ground. If the VIN2 input is subjected to inductive shorts to ground, then a

power Schottky diode must be added from ground to VIN2 to prevent this pin from

being driven below ground.

IPK0

Input Current Limit Select Bit of Battery Health Monitor (with IPK1 and IPK2). IPK0

should be tied to VINC to select high or to GND to select low to program the desired IPEAK

(see Table 7 in the Theory of Operation section). Do not float this pin.

IPK1

Input Current Limit Select Bit of Battery Health Monitor (with IPK0 and IPK2). See IPK0.

Do not float this pin.

AVCC

Supply Rail for the Coulomb Counter and Battery Health Monitor Circuit. AVCC is

normally connected to VOC, but some applications may connect to VINC (see the

Applications Information section).

Switching Frequency Programming Pin. A resistor placed from this pin to ground sets

the switching frequency of the buck converter.

VOC

Battery Health Monitor Output Voltage. Connect VIN2 or load to this pin.

VINC

Battery Health Monitor Input Voltage. Connect the battery as close as possible to this

pin.

LTM4719 Datasheet(PDF) 20 Page - Analog Devices