LTC1693
Hig h Sp e e d
Sing le / Dua l MOSFET Drive rs
U
FEATURES
DESCRIPTIO
Dual MOSFET Drivers in SO-8 Package
or Single MOSFET Driver in MSOP Package
1GΩ Electrical Isolation Between the Dual Drivers
The LTC®1693 family drives power MOSFETs at high
speed. The 1.5A peak output current reduces switching
losses in MOSFETs with high gate capacitance.
■
■
Permits High/Low Side Gate Drive
1.5A Peak Output Current
The LTC1693-1 contains two noninverting drivers. The
LTC1693-2 contains one noninverting and one inverting
driver. The LTC1693-1 and LTC1693-2 drivers are electri-
cally isolated and independent. The LTC1693-3 is a single
driver with an output polarity select pin.
■
■
16ns Rise/Fall Times at V = 12V, CL = 1nF
CC
■
■
Wide V Range: 4.5V to 13.2V
CC
CMOS Compatible Inputs with Hysteresis,
Input Thresholds are Independent of V
CC
■
■
■
The LTC1693 has VCC independent CMOS input thresh-
olds with 1.2V of typical hysteresis. The LTC1693 can
level-shift the input logic signal up or down to the rail-to-
Driver Input Can Be Driven Above V
Undervoltage Lockout
Thermal Shutdown
CC
rail V drive for the external MOSFET.
CC
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APPLICATIO S
■
TheLTC1693contains anundervoltagelockoutcircuitand
a thermal shutdown circuit. Both circuits disable the
external N-channel MOSFET gate drive when activated.
Power Supplies
High/Low Side Drivers
Motor/Relay Control
Line Drivers
■
■
TheLTC1693-1andLTC1693-2comeinan8-leadSOpack-
age. The LTC1693-3 comes in an 8-lead MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
■
Charge Pumps
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TYPICAL APPLICATIO
Two Transistor Foward Converter
V
IN
48VDC
±10%
C1
330µF
63V
C2
1.5µF
63V
+
R1
0.068Ω
D1
RETURN
MURS120
L1
1.5µH
Q1
T1
13:2
MTD20NO6HD
V
12V
OUT
1.5V/15A
C5
1µF
C3
4700pF
25V
R2
5.1Ω
D2
MURS120
•
•
C4
0.1µF
LTC1693CS8-2
1
2
3
4
8
7
6
5
IN1
GND1 OUT1
IN2
GND2 OUT2
C7
V
CC1
R3
17
249Ω
D3
MURS120
C6
470µF
6.3V
×8
C11
0.1µF
12V
IN
+
1%
20
V
CC2
BOOST
Q2
Si4420
×2
R4
C9
1800pF
5%
19
Q4
Si4420
1.24k
1%
LT1339
TG
1
2
C8
1µF
SYNC
5V
Q3
BAT54
1µF
NPO
18
11
12
16
14
13
9
MTD20NO6HD
TS
+
REF
R5
2.49k
1%
R6 100Ω
4
RETURN
SL/ADJ
SENSE
R7 100Ω
D4
3
–
C
T
SENSE
MBRO530T1
LTC1693CS8-2
1
2
3
4
8
5
IN1
GND1 OUT1
IN2
GND2 OUT2
V
I
BG
PHASE
CC1
AVG
R8
301k
1%
7
6
5
6
SS
7
V
V
C
RUN/SHDN
CC2
10
V
V
FB
C10
REF
SGND PGND
15
C12
100pF
R9
12k
0.1µF
R10
10k
1%
C13
1µF
C1: SANYO 63MV330GX
C2: WIMA SMD4036/1.5/63/20/TR
C6: KEMET T510X477M006AS (×8)
L1: GOWANDA 50-318
8
C14
3300pF
C15
0.1µF
T1: GOWANDA 50-319
1693 TA01
1