LTC3780
ORDER INFORMATION
LEAD FREE FINISH
LTC3780EG#PBF
LTC3780IG#PBF
LTC3780EUH#PBF
LTC3780IUH#PBF
LEAD BASED FINISH
LTC3780EG
LTC3780IG
LTC3780MPG
LTC3780EUH
LTC3780IUH
TAPE AND REEL
LTC3780EG#TRPBF
LTC3780IG#TRPBF
LTC3780EUH#TRPBF
LTC3780IUH#TRPBF
TAPE AND REEL
LTC3780EG#TR
LTC3780IG#TR
LTC3780MPG#TR
LTC3780EUH#TR
LTC3780IUH#TR
PART MARKING
LTC3780EG
LTC3780IG
3780
3780I
PART MARKING
LTC3780EG
LTC3780IG
LTC3780MPG
3780
3780I
PACKAGE DESCRIPTION
24-Lead Plastic SSOP
24-Lead Plastic SSOP
32-Lead (5mm
×
5mm) Plastic QFN
32-Lead (5mm
×
5mm) Plastic QFN
PACKAGE DESCRIPTION
24-Lead Plastic SSOP
24-Lead Plastic SSOP
24-Lead Plastic SSOP
32-Lead (5mm
×
5mm) Plastic QFN
32-Lead (5mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
SYMBOL
Main Control Loop
V
OSENSE
I
VOSENSE
V
LOADREG
Feedback Reference Voltage
Feedback Pin Input Current
Output Voltage Load Regulation
PARAMETER
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 15V unless otherwise noted.
CONDITIONS
I
TH
= 1.2V, –40°C ≤ T ≤ 85°C (Note 3)
–55°C ≤ T ≤ 125°C
(Note 3)
(Note 3)
∆I
TH
= 1.2V to 0.7V
∆I
TH
= 1.2V to 1.8V
V
IN
= 4V to 30V, I
TH
= 1.2V (Note 3)
I
TH
= 1.2V, Sink/Source = 3μA (Note 3)
(Note 8)
(Note 4)
V
RUN
= 0V, V
STBYMD
> 2V
V
RUN
= 0V, V
STBYMD
= Open
0.76
V
FCB
= 0.85V
Measured at FCB Pin
V
IN
Falling
Measured at V
OSENSE
Pin
V
SENSE–
= V
SENSE+
= 0V
V
STBYMD
Rising
V
STBYMD
Rising, V
RUN
= 0V
0.4
l
l
l
l
l
MIN
0.792
0.792
TYP
0.800
0.800
–5
0.1
–0.1
0.002
0.32
0.6
2400
1500
55
0.800
–0.18
5.3
3.8
MAX
0.808
0.811
–50
0.5
–0.5
0.02
UNITS
V
V
nA
%
%
%/V
mS
MHz
μA
μA
μA
V
μA
V
V
V
μA
V
V
V
REF(LINEREG)
g
m(EA)
g
m(GBW)
I
Q
Reference Voltage Line Regulation
Error Amplifier Transconductance
Error Amplifier GBW
Input DC Supply Current
Normal
Standby
Shutdown Supply Current
Forced Continuous Threshold
Forced Continuous Pin Current
Burst Inhibit (Constant Frequency)
Threshold
Undervoltage Reset
Feedback Overvoltage Lockout
Sense Pins Total Source Current
Start-Up Threshold
Keep-Alive Power-On Threshold
70
0.84
–0.1
5.5
4
0.88
V
FCB
I
FCB
V
BINHIBIT
UVLO
V
OVL
I
SENSE
V
STBYMD(START)
V
STBYMD(KA)
–0.30
0.84
0.86
–380
0.7
1.25
3780fe
3
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
