UC1711
UC3711
03/99
Dual Ultra High-Speed FET Driver
FEATURES
25ns Rise and Fall into 1000pF
15ns Propagation Delay
1.5A Source or Sink Output Drive
Operation with 5V to 35V Supply
High-Speed Schottky NPN Process
8-PIN MINIDIP Package
DESCRIPTION
The UC1711 family of FET drivers are made with an
all-NPN Schottky process in order to optimize switching
speed, temperature stability, and radiation resistance.
The cost for these benefits is a quiescent supply current
which varies with both output state and supply voltage.
For lower power requirements, refer to the the UC1709
family which is both pin compatible with, and functionally
equivalent to the UC1711.
These devices implement inverting logic with TTL com-
patible inputs, and output stages which will either source,
or sink in excess of 1.5A of load current with minimal
cross-conduction charge. Due to their monolithic
con-
struction, the channels are well matched and can be par-
alleled for doubled output current capability.
4
2
7.5V REG
6
V
CC
7
A Out
3k
3
B Out
A
IN
2.5k
3k
2.5k
B
IN
5
Gnd
BLOCK DIAGRAM
CONNECTION DIAGRAM
UDG-99078
DIL-8 (Top View)
J or N Package
TEMPERATURE RANGE
PACKAGE
UC1711J
55C to +125C
Ceramic DIP
UC3711J
0C to +70C
Ceramic DIP
UC3711N
0C to +70C
Plastic DIP
ORDERING INFORMATION
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Output Current (Source or Sink)
Steady State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
500mA
Peak Transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A
Maximum Forced Voltage . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Maximum Forced Current . . . . . . . . . . . . . . . . . . . . . . . 10mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
Operating Junction Temperature . . . . . . . . . . 55C to +150C
Storage Temperature . . . . . . . . . . . . . . . . . . . 65C to +150C
Note 1: Unless otherwise indicated, voltages are reference to
ground and currents are positive into, negative out of, the spec-
ified terminals. All reliability information for this device has been
gathered at an ambient air temperature of 125C, and a supply
voltage of 25V.
Note 2: Consult Unitrode databook for information regarding
thermal specifications and limitations of packages.
2
UC1711
UC3711
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, V
CC
= 15V. T
A
=T
J.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply
Supply Current (Note 3)
Both inputs = 0V; V
CC
= 15V
11
15
mA
Both inputs = 5V; V
CC= 15V
20
27
mA
Both inputs = 0V; V
CC= 35V
15
20
mA
Both inputs = 5V; V
CC= 35V
41
56
mA
Logic Inputs
Logic 0 Input Voltage
0.8
V
Logic 1 Input Voltage
2.2
V
Input Current
V
IN
= 0V
-5.0
-2.7
mA
V
IN
= 5V
0.5
2.0
mA
Output Stages
Output High Level
I
SOURCE
= 20mA, below V
CC
1.5
2.0
V
I
SOURCE
= 200mA, below V
CC
2.0
3.0
V
Output Low Level
I
SINK
= 20mA
.25
0.4
V
I
SINK
= 200mA
0.4
1.0
V
Switching Characteristics (Note 4)
Rise Time Delay, TPLH
C
LOAD
= 0
10
40
ns
C
LOAD
= 1000pF, (Note 5)
15
50
ns
C
LOAD
= 2200pF
20
55
ns
Fall Time Delay, TPHL
C
LOAD
= 0
3
20
ns
C
LOAD
= 1000pf, (Note 5)
5
20
ns
C
LOAD
= 2200pF
5
20
ns
Rise Time, TLH
C
LOAD
= 0, (Note 5)
12
25
ns
C
LOAD
= 1000pF, (Note 5)
25
40
ns
C
LOAD
= 2200pF
40
55
ns
Fall Time, THL
C
LOAD
= 0, (Note 5)
7
15
ns
C
LOAD
= 1000pF, (Note 5)
25
40
ns
C
LOAD
= 2200pF
40
55
ns
Total Supply Current
Freq = 200kHz, 50% Duty-cycle
Both Channels Switching
C
LOAD
= 0
17
23
mA
C
LOAD
= 2200pF
29
35
mA
Note 3: Supply currents at other input supply votages can be calculated by extrapolating the 15V and 35V supply currents. The im-
pedance of the chip at the V
CC
pin is linear for supply voltages from 8V to 35V, the approximate value of this impedance is 4.3k for
both inputs low, 0.94k for both inputs high, and 1.54k for one input high and one low.
Note 4: Switching test conditions are, V
CC
= 15V, Input voltage waveform levels are 0V and 5V, with transition times of <3ns. The
timing terms are defined as : TPHL Propagation delay 50% V
IN
to 90% V
OUT
; TPLH Propogation delay 50% V
IN
to 10% V
OUT
; THL
90% V
OUT
to 10% V
OUT
; TLH 10% V
OUT
to 90% V
OUT
.
Note 5: This specification not tested in production.Unless otherwise stated specifications hold for T
A
= 0 to 70C for the UC3711,
and T
A
= -55 to 125C for the UC1711, V
CC
= 15V. T
A
= T
J
.
UNITRODE CORPORATION
7 CONTINENTAL BLVD. MERRIMACK, NH 03054
TEL. (603) 424-2410 FAX (603) 424-3460
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