LT1769IGN datasheet(4/16 Pages) LINEAR

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LT1769

1769fa

ELECTRICAL CHARACTERISTICS

TYPICAL PERFORMANCE CHARACTERISTICS

Efficiency of Figure 1 Circuit

IBAT (A)

0.2

100

1.0

1.8

2.2

1769 G01

0.6

1.4

VIN = 16.5

VBAT = 8.4V

CHARGER EFFICIENCY

INCLUDES LOSS

IN DIODE D3

VCC (V)

7.0

6.5

6.0

5.5

5.0

4.5

1769 G03

TJ = 125°C

TJ = 25°C

TJ = 0°C

MAXIMUM DUTY CYCLE

ICC vs Duty Cycle

DUTY CYCLE (%)

1030

5070

1769 G02

TJ = 125°C

TJ = 0°C

TJ = 25°C

VCC = 16V

ICC vs VCC

The q denotes specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 16V, VBAT = 8V. No load on any outputs unless otherwise noted.

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: Tested with Test Circuit 1.

Note 3: Tested with Test Circuit 2.

Note 4: A linear interpolation can be used for reference voltage

specification between 0

°C and –40°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Voltage Amplifier VA

Transconductance (Note 3)

Output Current from 50

µA to 500µA

0.25

0.6

1.3

mho

Output Source Current

VOVP = VREF + 10mV, VPROG = VREF + 10mV

1.1

OVP Input Bias Current

VA Output Current at 0.5mA

±3

±10

VA Output Current at 0.5mA, TA > 90°C

–15

VA Output Current at 0.5mA, TA < 0°C

±15

Current Limit Amplifier CL1, 8V

≤ Input Common Mode

Turn-On Threshold

0.5mA Output Current

100

110

Transconductance

Output Current from 50

µA to 500µA

0.5

mho

CLP Input Current

0.5mA Output Current, VUV ≥ 0.4V

0.3

µA

CLN Input Current

0.5mA Output Current VUV ≥ 0.4V

0.8

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