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