LTC1693 Datasheet, PDF (1/20 Pages) Linear Technology – High Speed Single/Dual MOSFET Drivers

FEATURES
s _{Dual MOSFET Drivers in SO-8 Package}
or Single MOSFET Driver in MSOP Package
s _{1GΩ Electrical Isolation Between the Dual Drivers}
Permits High/Low Side Gate Drive
s _{1.5A Peak Output Current}
s _{16ns Rise/Fall Times at VCC = 12V, CL = 1nF}
s _{Wide VCC Range: 4.5V to 13.2V}
s _{CMOS Compatible Inputs with Hysteresis,}
Input Thresholds are Independent of V_CC
s _{Driver Input Can Be Driven Above VCC}
s _{Undervoltage Lockout}
s _{Thermal Shutdown}
U
APPLICATIO S
s _{Power Supplies}
s _{High/Low Side Drivers}
s _{Motor/Relay Control}
s _{Line Drivers}
s _{Charge Pumps}
LTC1693
High Speed
Single/Dual MOSFET Drivers
DESCRIPTIO
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.
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.
The LTC1693 has V_CC 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-
rail V_CC drive for the external MOSFET.
The LTC1693 contains an undervoltage lockout circuit and
a thermal shutdown circuit. Both circuits 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.
TYPICAL APPLICATIO
V_IN
48VDC
±10%
RETURN
+ C1
330µF
63V
Two Transistor Foward Converter
C2
1.5µF
63V
R1
0.068Ω
D1
MURS120
12V
C11
0.1µF
C9
1800pF
5%
NPO
C10 _R9
0.1µF _12k
C14
3300pF
C5
D2
1µF
MURS120
17
12V_IN
20
BOOST
R5
2.49k
1%
19
1
LT1339 TG
SYNC
BAT54
2
18
5V_REF
4
SL/ADJ
TS
SENSE ^{+ 11}
R6 100Ω
3
C_T
SENSE ^{– 12 R7 100Ω}
5
16
I_AVG
6
BG
14
R8
SS
PHASE
301k
7
V_C
13
RUN/SHDN
1%
10
9
C12
V_REF
V_FB
100pF
SGND PGND
R10
10k
C15 ⁸
15
1%
0.1µF
1 ^LTC1693CS8-2 8
IN1
V_CC1
2
7
GND1 OUT1
3
IN2
4
GND2
6
V_CC2
5
OUT2
C7
1µF
1 ^LTC1693CS8-2 8
IN1
V_CC1
2
7
GND1 OUT1
3
IN2
4
GND2
6
V_CC2
5
OUT2
C8
1µF
C13
1µF
Q1
MTD20NO6HD
T1
13:2
D3
MURS120
Q3
MTD20NO6HD
••
Q4
Si4420
C3
4700pF
25V
R2
5.1Ω
Q2
Si4420
×2
D4
MBRO530T1
C1: SANYO 63MV330GX
C2: WIMA SMD4036/1.5/63/20/TR
C6: KEMET T510X477M006AS (×8)
L1: GOWANDA 50-318
T1: GOWANDA 50-319
L1
1.5µH
C4
0.1µF
+ ^C6
470µF
6.3V
×8
V_OUT
1.5V/15A
R3
249Ω
1%
R4
1.24k
1%
RETURN
1693 TA01
1