LTC4070

3

4070f

ELECTRICAL CHARACTERISTICS

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: The LTC4070E is guaranteed to meet performance specifications

for junction temperatures from 0°C to 85°C. Specifications over the –40°C

to 85°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTC4070I is guaranteed over the full –40°C to 125°C operating junction

temperature range. Note that the maximum ambient temperature is

determined by specific operating conditions in conjunction with board

layout, the rated package thermal resistance and other environmental

factors.

The

negative. All voltages are referenced to GND unless otherwise noted. (Note 2)

impedance disables the regulator.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

High Battery Status

l

15

40

60

mV

Hysteresis

100

mV

Low Battery Status

LBO Threshold

l

3.08

3.2

3.34

V

Hysteresis

220

290

350

mV

Status Outputs HBO/LBO

CMOS Output Low

l

0.5

V

CMOS Output High

l

V

3-State Selection Input: ADJ

ADJ Input Level

Input Logic Low Level

l

0.3

V

Input Logic High Level

l

V

Allowable ADJ Leakage Current in

Floating State

l

±3

μA

NTC

NTC Leakage Current

–50

0

50

nA

Average NTCBIAS Sink Current

Pulsed Duty Cycle < 0.002%

30

pA

Delta Float Voltage per NTC Comparator

Step

ADJ = 0V

ADJ = Float

–50

–75

–100

mV

mV

mV

NTC Comparator Falling Thresholds

35.5

36.5

37.5

%

28.0

29.0

30.0

%

21.8

22.8

23.8

%

16.8

17.8

18.8

%

Hysteresis

30

mV

Drive Output

DRV Output Source Current

–1

mA

DRV Output Sink Current

3

μA