LTC3780EG Linear Technology, LTC3780EG Datasheet - Page 3

• Manufacturer Part Number: LTC3780EG
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,CMOS,SSOP,24PIN,PLASTIC
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
V
g
g
I
V
I
V
UVLO
V
I
V
V
DF MAX, BOOST Maximum Duty Factor
DF MAX, BUCK
V
I
V
V
TG1, TG2 t
TG1, TG2 t
BG1, BG2 t
BG1, BG2 t
TG1/BG1 t
BG1/TG1 t
TG2/BG2 t
BG2/TG2 t
Mode
Transition 1
Mode
Transition 2
Q
FCB
SENSE
SS
m(EA)
m(GBW)
REF(LINEREG)
FCB
BINHIBIT
OVL
STBYMD(START)
STBYMD(KA)
RUN(ON)
SENSE(MAX)
SENSE(MIN,BUCK)
1D
2D
3D
4D
r
f
r
f
PARAMETER
Reference Voltage Line Regulation
Error Amplifier Transconductance
Error Amplifier GBW
Input DC 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
Maximum Duty Factor
RUN Pin On Threshold
Soft-Start Charge Current
Maximum Current Sense Threshold
Minimum Current Sense Threshold
TG Rise Time
TG Fall Time
BG Rise Time
BG Fall Time
TG1 Off to BG1 On Delay,
Switch C On Delay
BG1 Off to TG1 On Delay,
Synchronous Switch D On Delay
TG2 Off to BG2 On Delay,
Synchronous Switch B On Delay
BG2 Off to TG2 On Delay,
Switch A On Delay
BG1 Off to BG2 On Delay,
Switch A On Delay
BG2 Off to BG1 On Delay,
Synchronous Switch D On Delay
Normal
Standby
Shutdown Supply Current
A
= 25°C. V
CONDITIONS
V
I
(Note 4)
V
Measured at FCB Pin
V
Measured at V
V
V
V
% Switch C On
% Switch A On (in Dropout)
V
V
Boost: V
Buck: V
Discontinuous Mode
C
C
C
C
C
C
C
C
C
C
TH
IN
FCB
IN
SENSE
STBYMD
STBYMD
RUN
RUN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
V
V
The
RUN
RUN
= 1.2V, Sink/Source = 3µA (Note 3)
= 4V to 30V, I
Falling
= 0.85V
Rising
= 2V
= 3300pF (Note 5)
= 3300pF (Note 5)
= 3300pF (Note 5)
= 3300pF (Note 5)
= 3300pF Each Driver
= 3300pF Each Driver
= 3300pF Each Driver
= 3300pF Each Driver
= 3300pF Each Driver
= 3300pF Each Driver
–
●
= 0V, V
= 0V, V
OSENSE
OSENSE
= V
IN
Rising
Rising, V
indicates specifications which apply over the full operating
= 15V unless otherwise noted.
SENSE
OSENSE
STBYMD
STBYMD
= V
= V
+
TH
RUN
REF
= 0V
REF
= 1.2V (Note 3)
Pin
– 50mV
> 2V
= Open
= 0V
– 50mV
●
●
●
–0.30
MIN
0.76
0.84
–95
0.4
0.5
1
0.002
0.800
–0.18
2400
1500
–380
–130
TYP
0.32
0.86
1.25
160
0.6
5.3
3.8
0.7
1.5
1.2
55
99
99
–6
50
45
45
55
80
80
80
80
90
90
LTC3780
MAX
–150
0.02
0.84
–0.1
0.88
185
5.5
70
4
2
UNITS
3
MHz
3780f
%/V
mS
mV
mV
mV
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
%
V
V
V
V
V
V
V