LTC1622 データシートの表示（PDF） - Linear Technology
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LTC1622 Datasheet PDF : 16 Pages
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LTC1622
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN).........................– 0.3V to 10V
RUN/SS Voltage .......................................– 0.3V to 2.4V
SYNC/MODE Voltage ................................. – 0.3V to VIN
SENSE – Voltage .......................................... 2.4V to VIN
PDRV Peak Output Current (< 10µs) ......................... 1A
Storage Ambient Temperature Range ... – 65°C to 150°C
Operating Temperature Range
Commercial ............................................ 0°C to 70°C
Industrial ........................................... – 45°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
SENSE– 1
ITH 2
VFB 3
RUN/SS 4
TOP VIEW
8 VIN
7 PDRV
6 GND
5 SYNC/MODE
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 250°C/ W
ORDER PART
NUMBER
LTC1622CMS8
MS8 PART MARKING
LTDB
SENSE– 1
ITH 2
VFB 3
RUN/SS 4
TOP VIEW
8 VIN
7 PDRV
6 GND
5 SYNC/MODE
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 150°C/ W
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1622CS8
LTC1622IS8
S8 PART MARKING
1622
1622I
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
IVFB
Feedback Current
VFB
Regulated Feedback Voltage
(Note 3) VFB = 0.8V
(Note 3) Commercial Grade
(Note 3) Industrial Grade
10
70
q 0.785 0.8 0.815
q 0.780 0.8 0.820
VOVL
∆VOSENSE
VLOADREG
Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
IS
VRUN/SS
Input DC Supply Current
Burst Mode Inhibited
Sleep Mode
Shutdown
Shutdown
RUN/SS Threshold
Referenced to Nominal VOUT
4
VIN = 4.2V to 8.5V (Note 3)
Measured in Servo Loop; VITH = 0.2V to 0.625V
Measured in Servo Loop; VITH = 0.9V to 0.625V
(Note 4)
VIN = 2.3V
VITH = 0V, VSYNC/MODE = 2.4V
VRUN/SS = 0V
VRUN/SS = 0V, VIN = VUVLO – 0.1V
Commercial Grade
Industrial Grade
q 0.4
q 0.3
7.5
10.5
0.04 0.08
0.3 0.5
– 0.3 – 0.5
450
350 400
15
30
4
10
0.7
0.9
0.7
1.0
IRUN/SS
fOSC
Soft-Start Current Source
Oscillator Frequency
VSYNC/MODE SYNC/MODE Threshold
VUVLO
Undervoltage Lockout
VRUN/SS = 0V
VFB = 0.8V
VFB = 0V
VSYNC/MODE Ramping Down
VIN Ramping Down
VIN Ramping Up
1
2.5
5
475 550 625
75
110 140
1
1.5
q 1.55 1.92
2.3
1.97 2.36
UNITS
nA
V
V
%
%/V
%
%
µA
µA
µA
µA
V
V
µA
kHz
kHz
V
V
V
2
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