LT1505CG Ver la hoja de datos (PDF) - Linear Technology
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LT1505CG Datasheet PDF : 16 Pages
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LT1505
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 18V, VBAT = 12.6V, VCLN = VCC (LT1505), no load on any
outputs unless otherwise noted.
PARAMETER
Preset Battery Voltage (12.3V, 16.4V, 12.6V, 16.8V)
All Preset Battery Voltages
Preset Battery Voltage Tolerance
BAT2 Pin Input Current
Voltage Setting Resistors Tolerance (R4, R5, R6, R7)
Shutdown
Undervoltage Lockout (TGATE and BGATE “Off”)
Threshold (Note 9)
UV Pin Input Current
Reverse Current from Battery in Micropower
Shutdown (Note 10)
Shutdown Threshold at SHDN Pin When VCC
is Connected
SHDN Pin Current
Supply Current in Shutdown
(VSHDN is Low, VCC is Connected)
Minimum IPROG for Switching “On”
Minimum IPROG for Switching “Off” at VPROG ≤ 1V
Current Sense Amplifier CA1 Inputs (SENSE, BAT)
Input Bias Current (SENSE, BAT)
Input Common Mode Low
Input Common Mode High
SPIN Input Current
Oscillator
Switching Frequency (fNOM)
Switching Frequency Tolerance
SYNC Pin Input Current
Synchronization Pulse Threshold on SYNC Pin
Synchronization Frequency
Maximum Duty Cycle
VBOOST Threshold to Turn TGATE Off
(Comparator A2) (Note 4)
Maximum Duty Cycle of Natural Frequency 200kHz
(Note 5)
Current Amplifier CA2
Transconductance
Maximum VC for Switch Off
IVC Current (Out of Pin)
VC at Shutdown
CONDITIONS
Measured at BAT2 Pin
(VBAT + 0.3V) ≤ VCC ≤ 24V
VBAT2 = VPRESET – 1V
Measured at UV Pin
0V ≤ VUV ≤ 8V
VBAT ≤ 20V, VUV ≤ 0.4V,
VCC = VSW = Battery Voltage
0V ≤ VSHDN ≤ 3V
VCC ≤ 24V
VSHDN = High
VSHDN = Low (Shutdown)
VSHDN = High, VSPIN ≥ 2V (Note 8)
VSHDN = Low (Shutdown)
VSYNC = 0V
VSYNC = 2V
Measured at (VBOOST – VSW)
Low to High
Hysteresis
VC = 1V, IVC = ±1µA
VC ≥ 0.6V
VC < 0.45V
VSHDN = Low (Shutdown)
MIN TYP MAX
0.5
q
–1
1
q
6
– 40
40
q
6.3
6.7
7.15
q
–1
5
10
30
q
1
2
8
15
20
–1
–4
– 22
q
–1
– 2.4
q
– 50 – 120
– 10
q – 0.25
q
VCC – 0.3
q
2
10
180 200 220
q
170
200
230
– 0.5
– 30
0.9
1.2
2.0
q
240
280
q
6.8
7.1
7.3
0.25
q
85
90
150 200 300
q
0.6
q
50
q
3
q
0.35
UNITS
%
%
µA
%
V
µA
µA
V
µA
mA
µA
mA
µA
µA
V
V
mA
µA
kHz
kHz
mA
µA
V
kHz
V
V
%
µmho
V
µA
mA
V
3
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