LT1769IGN View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LT1769IGN
Linear Technology
'LT1769IGN' PDF : 16 Pages View PDF
LT1769
ELECTRICAL CHARACTERISTICS 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.
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Voltage Amplifier VA
Transconductance (Note 3)
Output Current from 50µA to 500µA
0.25
0.6
1.3
mho
Output Source Current
VOVP = VREF + 10mV, VPROG = VREF + 10mV
1.1
mA
OVP Input Bias Current
VA Output Current at 0.5mA
q
±3
±10
nA
VA Output Current at 0.5mA, TA > 90°C
VA Output Current at 0.5mA, TA < 0°C
q –15
25
nA
±15
nA
Current Limit Amplifier CL1, 8V ≤ Input Common Mode
Turn-On Threshold
0.5mA Output Current
93
100 110
mV
Transconductance
CLP Input Current
CLN Input Current
Output Current from 50µA to 500µA
0.5mA Output Current, VUV ≥ 0.4V
0.5mA Output Current VUV ≥ 0.4V
0.5
1
2
mho
0.3
1
µA
0.8
2
mA
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.
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency of Figure 1 Circuit
100
98
VIN = 16.5
VBAT = 8.4V
96
94
92
CHARGER EFFICIENCY
90
88
86
INCLUDES LOSS
84
IN DIODE D3
82
80
0.2 0.6 1.0 1.4 1.8 2.2
IBAT (A)
1769 G01
ICC vs Duty Cycle
8
VCC = 16V
7
6
5
TJ = 0°C
4
3
TJ = 125°C
TJ = 25°C
2
1
0
0 10 20 30 40 50 60 70 80
DUTY CYCLE (%)
1769 G02
ICC vs VCC
7.0
MAXIMUM DUTY CYCLE
6.5
TJ = 0°C
TJ = 25°C
6.0
TJ = 125°C
5.5
5.0
4.5
0
5 10 15 20 25 30
VCC (V)
1769 G03
1769fa
4
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