LTC1649 データシートの表示（PDF） - Linear Technology
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LTC1649 Datasheet PDF : 16 Pages
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LTC1649
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage
VIN ........................................................................................... 6V
VCC ........................................................................................... 9V
PVCC1, 2 ................................................................................ 13V
Input Voltage
IFB ....................................................................... – 0.3V to 18V
C+, C – ................................................ – 0.3V to (VIN + 0.3V)
All Other Inputs ....................... – 0.3V to (VCC + 0.3V)
Operating Temperature Range
LTC1649C ............................................... 0°C to 70°C
LTC1649I ............................................ – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER INFORMATION
G1 1
PVCC1 2
GND 3
FB 4
SHDN 5
SS 6
VIN 7
C– 8
TOP VIEW
16 G2
15 PVCC2
14 VCC
13 IFB
12 IMAX
11 COMP
10 CPOUT
9 C+
S PACKAGE
16-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 110°C/ W
ORDER PART
NUMBER
LTC1649CS
LTC1649IS
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V (Note 2)
SYMBOL PARAMETER
CONDITIONS
VIN
Minimum Supply Voltage
Figure 1 (Note 3)
q
VFB
Feedback Voltage
Figure 1
q
VCPOUT Charge Pump Output Voltage
Figure 1
q
IIN
Supply Current (VIN)
VSHDN = VCC, ILOAD = 0
q
VSHDN = 0V
IPVCC1, 2 Supply Current (PVCC1, 2)
PVCC = 5V, VSHDN = VCC (Note 4)
VSHDN = 0V
fCP
Internal Charge Pump Frequency ICPOUT = 20mA (Note 5)
fOSC
Internal PWM Oscillator Frequency
q
VIH
SHDN Input High Voltage
q
VIL
SHDN Input Low Voltage
q
IIN
SHDN Input Current
q
gmV Error Amplifier Transconductance
gmI
ILIM Amplifier Transconductance (Note 6)
IIMAX IMAX Sink Current
VIMAX = VCC
q
ISS
Soft Start Source Current
VSS = 0V
q
tr, tf
Driver Rise/Fall Time
PVCC1 = PVCC2 = 5V (Note 7)
tNOV Driver Non-Overlap Time
PVCC1 = PVCC2 = 5V
DCMAX Maximum Duty Cycle
VCOMP = VCC
LTC1649CS
MIN TYP MAX
2.7
1.25 1.265 1.28
4.8 5 5.2
3
5
10 25
1.5
0.1
700
140 200 260
2.4
0.8
±0.01 ±1
650
1300
8
12
16
–8 –12 –16
80 250
25 130 250
90.5 93
LTC1649IS
MIN TYP MAX
2.7
1.23 1.265 1.29
4.75 5 5.25
3
5
10 25
1.5
0.1
700
130 200 325
2.4
0.8
±0.01 ±1
650
1300
8 12 17
–8 –12 –17
80 250
25 130 250
90.5 93
UNITS
V
V
V
mA
µA
mA
µA
kHz
kHz
V
V
µA
µMho
µMho
µA
µA
ns
ns
%
2
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