LTC1775 データシートの表示（PDF） - Linear Technology
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LTC1775
Linear Technology
LTC1775 Datasheet PDF : 24 Pages
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LTC1775
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (VIN, TK) ................. 36V to – 0.3V
Boosted Supply Voltage (BOOST) ............. 42V to – 0.3V
Boosted Driver Voltage (BOOST – SW) ...... 7V to – 0.3V
Switch Voltage (SW) ....................................36V to – 5V
EXTVCC Voltage ...........................................7V to – 0.3V
ITH Voltage ................................................2.7V to – 0.3V
FCB, RUN/SS, SYNC Voltages .....................7V to – 0.3V
VOSENSE, VPROG Voltages ........(INTVCC + 0.3V) to – 0.3V
Peak Driver Output Current < 10µs (TG, BG) ............ 2A
INTVCC Output Current ........................................ 50mA
Operating Ambient Temperature Range
LTC1775C .............................................. 0°C to 70°C
LTC1775I (Note 5) .............................. – 40°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
EXTVCC 1
SYNC 2
RUN/SS 3
FCB 4
ITH 5
SGND 6
VOSENSE 7
VPROG 8
16 VIN
15 TK
14 SW
13 TG
12 BOOST
11 INTVCC
10 BG
9 PGND
GN PACKAGE
16-LEAD NARROW
PLASTIC SSOP
S PACKAGE
16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 130°C/W (GN)
TJMAX = 125°C, θJA = 110°C/W (S)
ORDER PART
NUMBER
LTC1775CGN
LTC1775CS
LTC1775IGN
LTC1775IS
GN PART MARKING
1775
1775I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted.
SYMBOL
PARAMETER
Main Control Loop
IINVOSENSE
VOUT
Feedback Current
Regulated Output Voltage
1.19V (Adjustable) Selected
3.3V Selected
5V Selected
VLINEREG
Reference Voltage Line Regulation
VLOADREG
Output Voltage Load Regulation
VFCB
IFCB
VOVL
IPROG
IQ
Forced Continuous Threshold
Forced Continuous Bias Current
Output Overvoltage Lockout
VPROG Input Current
3.3V VOUT
5V VOUT
Input DC Supply Current
Normal Mode
Shutdown
VRUN/SS
IRUN/SS
∆VSENSE(MAX)
RUN/SS Pin Threshold
Soft Start Current Source
Maximum Current Sense Threshold
CONDITIONS
VPROG Pin Open, ITH = 1.19V (Note 3)
ITH = 1.19V (Note 3)
VPROG Pin Open
VPROG = 0V
VPROG = INTVCC
VIN = 4V to 20V, ITH = 1.19V (Note 3),
VPROG Pin Open
ITH = 2V (Note 3)
ITH = 0.5V (Note 3)
VFCB Ramping Negative
VFCB = 1.19V
VPROG Pin Open
VPROG = 0V
VPROG = 5V
EXTVCC = 5V (Note 4)
VRUN/SS = 0V, 4V < VIN < 15V
VRUN/SS = 0V
VOSENSE = 1V, VPROG Pin Open
MIN
TYP
MAX
10
50
q 1.178
q 3.220
q 4.900
1.190
3.300
5.000
0.001
1.202
3.380
5.100
0.01
q
q
q 1.16
1.24
– 0.020 – 0.2
0.035 0.2
1.19 1.22
–1
–2
1.28 1.32
– 3.5
–7
3.5
7
q 0.8
–1.2
260
500
15
30
1.4
2
–2.5
–4
300
340
UNITS
nA
V
V
V
%/V
%
%
V
µA
V
µA
µA
µA
µA
V
µA
mV
2
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