2
LTC1477/LTC1478
Supply Voltage .......................................................... 7V
Enable Input Voltage...................... (7V) to (GND –0.3V)
Output Voltage (OFF) (Note 1) ....... (7V) to (GND –0.3V)
Output Short-Circuit Duration.......................... Indefinite
Junction Temperature........................................... 110°C
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Operating Temperature
LTC1477C/LTC1478C .............................. 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
W
U
U
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Supply Voltage Range 2.7 5.5 V
I
VIN
Supply Current Switch OFF, Enable = 0V ● 0.01 10 µA
Switch ON, Enable = 5V, V
IN
= 5V ● 120 180 µA
Switch ON, Enable = 3.3V, V
IN
= 3.3V ● 80 120 µA
R
ON
ON Resistance V
INS
= V
IN1
= V
IN2
= V
IN3
= 5V, I
OUT
= 1A 0.07 0.12 Ω
V
INS
= V
IN1
= V
IN2
= V
IN3
= 3.3V, I
OUT
= 1A 0.08 0.12 Ω
V
INS
= V
IN1
= 5V, V
IN2
= V
IN3
= NC, I
OUT
= 0.5A 0.12 0.20 Ω
V
INS
= V
IN1
= 3.3V, V
IN2
= V
IN3
= NC, I
OUT
= 0.5A 0.13 0.20 Ω
I
LKG
Output Leakage Current OFF Switch OFF, Enable = 0V ● ±20 µA
I
SC
Short-Circuit Current Limit V
INS
= V
IN1
= V
IN2
= V
IN3
= 5V, V
OUT
= 0V, (Note 4) 1.60 2.00 2.40 A
V
INS
= V
IN1
= 5V, V
IN2
= V
IN3
= NC, V
OUT
= 0V, (Note 4) 0.68 0.85 1.02 A
V
ENH
Enable Input High Voltage 3.0V ≤ V
INS
≤ 5.5V ● 2.0 V
V
ENL
Enable Input Low Voltage 3.0V ≤ V
INS
≤ 5.5V ● 0.8 V
I
EN
Enable Input Current 0V ≤ V
EN
≤ 5.5V ● ±1 µA
t
D+R
Delay and Rise Time R
OUT
= 100Ω, C
OUT
= 1µF, to 90% of Final Value 0.50 1.00 2.00 ms
increase the ON resistance of the switch. The LTC1478 GND pins must be
connected together. (See Pin Functions and Block Diagram for more detail.)
Note 3: Other channel turned OFF, i.e. AEN and BEN = 0V.
Note 4: The output is protected with fold-back current limit which reduces
the short-circuit (0V) currents below peak permissible current levels at
higher output voltages. (See Typical Performance Characteristics for
further detail on output current versus output voltage).
The
● denotes specifications which apply over the full operating
temperature range.
Note 1: The V
OUT
pins must be connected together.
Note 2: The V
INS
and V
IN1
pins must be connected together. The V
IN2
and
V
IN3
pins are typically connected to V
INS
and V
IN1
pins but can be
selectively disconnected to reduce the short-circuit current limit and
Consult factory for Industrial and Military grade parts.
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
AV
OUT
AV
IN
AV
INS
AEN
GND
BV
IN3
BV
IN2
BV
OUT
AV
OUT
AV
IN2
AV
IN3
GND
BEN
BV
INS
BV
IN1
BV
OUT
T
JMAX
= 110°C, θ
JA
= 100°C/ W
ELECTRICAL CHARACTERISTICS
V
INS
= V
IN1
= V
IN2
= V
IN3
= 5V (Note 2), T
A
= 25°C, unless otherwise noted. Each channel of the LTC1478 is tested separately (Note 3).
T
JMAX
= 110°C, θ
JA
= 120°C/W
1
2
3
4
8
7
6
5
TOP VIEW
V
OUT
V
IN2
V
IN3
GND
V
OUT
V
IN1
V
INS
EN
S8 PACKAGE
8-LEAD PLASTIC SO
1477
S8 PART MARKING
LTC1477CS8
ORDER PART
NUMBER
LTC1478CS
ORDER PART
NUMBER
