LTC4355 datasheet(3/20 Pages) LINEAR

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LTC4419

4419f

For more information www.linear.com/LTC4419

elecTrical characTerisTics The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. V1 = 3.6V, V2 = 3.6V unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage and Currents

V1, V2

Operating Voltage Range

1.8

IV1

V1 Current, V1 Powering OUT

V1 Current, V2 Powering OUT

IOUT = 0, V1 = 8.4V, V2 = 3.6V

V1 = 8.4V, V2 = 3.6V

3.6

500

6.3

800

µA

IV2

V2 Current, V2 Powering OUT

V2 Current, V1 Powering OUT

V2 Current in Freshness Seal Mode

IOUT = 0, V1 = 3.6V, V2 = 8.4V

V1 = 3.6V, V2 = 8.4V

V1 = GND, V2 = 5V

3.3

320

120

650

220

µA

RON

Switch Resistance

V1 = V2 = 5V, IOUT = –100mA

tVALID(V1)

Input Qualification Time

V1 Rising, ADJ Rising

Input Comparators

VTHA

ADJ Threshold

ADJ Falling

1.032

1.047

1.062

VHYSTA

ADJ Comparator Hysteresis

ADJ Rising

VTHC

CMP1, CMP2 Threshold

CMP1, CMP2 Falling

0.378

0.387

0.396

VHYSTC

CMP1, CMP2 Hysteresis

CMP1, CMP2 Rising

7.5

12.5

tPDA

ADJ Comparator Falling Response Time

10% Overdrive

7.3

µs

tPDC

CMP1, CMP2 Comparator Response Times

20% Overdrive

µs

Power Path Function

ILIM

Output Current Limit

V1, V2 = 8.4V

0.5

1.1

1.6

VREV

Reverse Comparator Threshold

(V1, V2) – VOUT for Power Path Turn-On

tSWITCH

Break-Before-Make Switchover Time

V1 = V2 = 5V, IOUT < –10mA

2.5

µs

I/O Specifications

VOL

Output Voltage Low, CMPOUT1, CMPOUT2

and V2ON

I = 100µA

I = 1mA

120

250

VOH

V2ON Output High Voltage

I = –1µA, V2 = 5V

1.05

1.65

2.3

IOH

CMPOUT1, CMPOUT2 and V2ON,

Output High Leakage

CMPOUT1, CMPOUT2, V2ON = 18V

±50

±150

IPU(V2ON)

V2ON Pull-Up Current

V2 = 5V, ADJ = 0V, V2ON = 0V

–2.7

–5

–8

µA

ILEAK

ADJ, CMP1, CMP2 Leakage Current

ADJ, CMP1, CMP2 = 0V, 1.5V

±1

±5

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: All currents into pins are positive; all voltages are referenced to

GND unless otherwise noted.

Note 3: These pins can be tied to voltages down to –5V through a resistor

that limits the current to less than –1mA.

Note 4: The LTC4419 includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

Note 5: The LTC4419 is tested under pulsed load conditions such that

TJ ≈ TA. The junction temperature (TJ in °C) is calculated from the ambient

temperature (TA in °C) and power dissipation (PD in Watts) according to

the formula:

TJ = TA + (PD • θJA)

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