LTC1266 Ver la hoja de datos (PDF) - Linear Technology
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LTC1266 Datasheet PDF : 20 Pages
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LTC1266
LTC1266-3.3/LTC1266-5
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = VBINH = 0V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
VSENSE 1 Current Sense Threshold
(Burst Mode Operation Enabled)
LTC1266
LTC1266-3.3
LTC1266-5
VSENSE 2 Current Sense Threshold
(Burst Mode Operation Disabled)
LTC1266
LTC1266-3.3
LTC1266-5
VSHDN
ISHDN
IPINV
VBINH
Shutdown Pin Threshold
Shutdown Pin Input Current
Phase Invert Pin Input Current
Burst Mode Operation
Inhibit Pin Threshold
VBINH = 0V
VSENSE – = 3.3V, VFB = VOUT/2.64 + 25mV (Forced)
VSENSE – = 3.3V, VFB = VOUT/2.64 – 25mV (Forced)
VSENSE – = VOUT + 100mV (Forced)
VSENSE – = VOUT – 100mV (Forced)
VSENSE – = VOUT + 100mV (Forced)
VSENSE – = VOUT – 100mV (Forced)
VBINH = 2.1V
VSENSE – = 3.3V, VFB = VOUT/2.64 + 25mV (Forced)
VSENSE – = 3.3V, VFB = VOUT/2.64 – 25mV (Forced)
VSENSE – = VOUT + 100mV (Forced)
VSENSE – = VOUT – 100mV (Forced)
VSENSE – = VOUT + 100mV (Forced)
VSENSE – = VOUT – 100mV (Forced)
0V < VSHDN < 8V, VIN = 16V
0V < VPINV < 18V, VIN = 18V
VIN = 7V
25
q 135 155 175
25
q 135 155 175
25
q 135 155 175
– 20
q 135 155 175
– 20
q 135 155 175
– 20
q 135 155 175
0.6 0.8 2
1.2 5
0.2 1
0.8 1.2 2
IBINH
Burst Mode Operation
Inhibit Pin Input Current
0V < VBINH < 18V, VIN = 18V
0.2 1
ICT
tOFF
tMAX
tr, tf
VCLAMP
VLBTRIP
ILBLEAK
CT Pin Discharge Current
Off-Time (Note 4)
Max On-Time
Driver Output Transition Times (Note 7)
Output Voltage Clamp in
Burst Mode Operation Inhibit
LTC1266
LTC1266-3.3
LTC1266-5
Low-Battery Trip Point
Max Leakage Current Into Pin 14
VSENSE + = VOUT – 100mV, VSENSE – = VOUT – 300mV
VOUT = 0V
CT = 390pF, ILOAD = 700mA
VOUT = 0V, VIN = 18V
CL = 3000pF (Pins 1, 16), VIN = 6V
VBINH = 2.1V
Measured at VFB
Measured at VSENSE –
Measured at VSENSE –
VIN = 5V
VIN = 12V
VLBOUT = 18V, VLBIN = 2V
50 70 90
2
10
4
5
6
60
100 200
1.30
3.43
5.20
1.14 1.25 1.35
1.17 1.30 1.42
25 200
ILBSINK
ILBIN
Max Sink Current Into Pin 14
Max Leakage Current Into Pin 13
VLBOUT = 1V, VLBIN = 0V, 2.5V < VIN < 18V
VLBIN = 18V
1
8
0.2 1
UNITS
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
µA
µA
V
µA
µA
µA
µs
µs
ns
V
V
V
V
V
nA
mA
µA
– 40°C < TA < 85°C (Note 5), VIN = 10V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
VFB
Feedback Voltage
LTC1266AIS
LTC1266CS, LTC1266IS
VIN = 9V, ILOAD = 700mA, VPINV = VPWR = 14V,
Topside Switch = N-Ch
VOUT
Regulated Output Voltage
LTC1266CS-3.3, LTC1266IS-3.3
LTC1266CS-5, LTC1266IS-5
VIN = 9V, ILOAD = 700mA, VPINV = VPWR = 14,
Topside Switch = N-Ch
MIN TYP MAX UNITS
1.246 1.265 1.290
V
1.210 1.265 1.290
V
3.23 3.33 3.43
V
4.90 5.05 5.20
V
3
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