LTC3788 Linear Technology, LTC3788 Datasheet - Page 3

• Manufacturer Part Number: LTC3788
• Description: Dual Output Synchronous Boost Controller
• Manufacturer: Linear Technology

www.DataSheet4U.com
ELECTRICAL CHARACTERISTICS
junction temperature range, otherwise specifi cations are at T
SYMBOL
V
g
I
UVLO
V
V
I
I
I
V
V
I
I
t
t
t
t
R
R
R
R
t
t
Q
RUN1,2
RUN1,2
SS1,2
SENSE1,2 +
SENSE1,2 –
r(TG1,2)
f(TG1,2)
r(BG1,2)
f(BG1,2)
D(TG/BG)
D(BG/TG)
m1,2
LOADREG
RUN1,2
RUNHYS
SENSE(MAX)
SENSE(CM)
UP(TG1,2)
DN(TG1,2)
UP(TG1,2)
DN(TG1,2)
PARAMETER
Output Voltage Load Regulation
Error Amplifi er Transconductance
Input DC Supply Current
Pulse-Skipping or Forced Continuous Mode
(One Channel On)
Pulse-Skipping or Forced Continuous Mode
(Both Channels On)
Sleep Mode
(One Channel On)
Sleep Mode
(Both Channels On)
Shutdown
INTV
RUN Pin On Threshold
RUN Pin Hysteresis
RUN Pin Hysteresis Current
RUN Pin Current
Soft-Start Charge Current
Maximum Current Sense Threshold
SENSE Pins Common Mode Range (BOOST
Converter Input Supply Voltage V
SENSE
SENSE
Top Gate Rise Time
Top Gate Fall Time
Bottom Gate Rise Time
Bottom Gate Fall Time
Top Gate Pull-Up Resistance
Top Gate Pull-Down Resistance
Bottom Gate Pull-Up Resistance
Bottom Gate Pull-Down Resistance
Top Gate Off to Bottom Gate On
Switch-On Delay Time
Bottom Gate Off to Top Gate On
Switch-On Delay Time
CC
+
–
Undervoltage Lockout Thresholds
Pin Current
Pin Current
IN
)
CONDITIONS
(Note 4)
Measured in Servo Loop;
ΔI
Measured in Servo Loop;
ΔI
I
(Note 5)
RUN1 = 5V and RUN2 = 0V or RUN1 = 0V
and RUN2 = 5V; V
RUN1,2 = 5V; V
RUN1 = 5V and RUN2 = 0V or RUN1 = 0V
and RUN2 = 5V; V
RUN1,2 = 5V; V
RUN1,2 = 0V
V
V
V
V
V
V
V
V
V
V
V
C
C
C
C
C
C
TH
INTVCC
INTVCC
RUN
RUN
RUN
SS
FB
FB
FB
FB
FB
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
TH
TH
The
= 1.2V
= 1.1V, I
= 1.1V, I
= 1.1V, I
= 1.1V, I
= 1.1V, I
= GND
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
Rising
> 1.28V
< 1.28V
A
= 3300pF (Note 6)
= 3300pF (Note 6)
= 3300pF (Note 6)
= 3300pF (Note 6)
= 3300pF (Each Driver)
= 3300pF (Each Driver)
= 25°C, VBIAS = 12V, unless otherwise noted (Note 2).
Ramping Up
Ramping Down
l
denotes the specifi cations which apply over the full operating
LIM
LIM
LIM
LIM
LIM
FB1,2
FB1,2
= INTV
= Float
= GND
= Float
= Float
FB1(2)
FB1(2)
= 1.25V (No Load)
= 1.25V (No Load)
CC
= 1.25V (No Load)
= 1.25V (No Load)
l
l
l
l
l
l
l
l
MIN
1.18
3.6
2.5
90
68
42
7
–0.01
0.01
1.28
TYP
125
200
100
100
200
0.9
1.2
4.1
3.8
4.5
0.5
1.5
1.5
1.5
1.5
10
75
50
20
20
20
20
70
70
2
8
LTC3788
MAX
–0.1
1.38
190
300
110
300
0.1
4.3
20
13
82
56
38
±1
UNITS
mmho
3
3788f
mA
mA
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
μA
μA
ns
ns
ns
ns
ns
ns
%
%
Ω
Ω
Ω
Ω
V
V
V
V