LT1424IS8-5 Linear Technology, LT1424IS8-5 Datasheet - Page 5

• Manufacturer Part Number: LT1424IS8-5
• Description: IC SW REG ISOLATD FLYBCK 5V8SOIC
• Manufacturer: Linear Technology
• Type: Flybackr

Specifications of LT1424IS8-5

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 200mA
• Frequency - Switching: 285kHz
• Voltage - Input: 2.8 ~ 20 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFOR A CE CHARACTERISTICS
PIN
SHDN (Pin 1): Shutdown. This pin is used to turn off the
regulator and reduce V
microamperes. The SHDN pin can be left floating when
unused.
V
feedback amplifier and the input of the current compara-
tor. Frequency compensation of the overall loop is effected
by placing a capacitor between this node and ground.
SYNC (Pin 3): Pin to synchronize internal oscillator to
external frequency reference. It is directly logic compat-
ible and can be driven with any signal between 10% and
90% duty cycle. If unused, this pin should be tied to
ground.
SGND (Pin 4): Signal Ground. This pin is a clean ground.
The internal reference and feedback amplifier are referred
to it. Keep the ground path connection to the V
sation capacitor free of large ground currents.
C
275
250
225
200
175
150
125
100
U
(Pin 2): Control Voltage. This pin is the output of the
– 50
Minimum Switch On Time
vs Temperature
FUNCTIONS
– 25
U
0
TEMPERATURE ( C)
25
U
50
IN
75
input current to a few tens of
W
100
1424-5 G10
U
125
250
225
200
175
150
125
100
75
– 50
Flyback Enable Delay Time
vs Temperature
C
compen-
– 25
0
TEMPERATURE ( C)
25
PGND (Pin 5): Power Ground. This pin is the emitter of the
power switch device and has large currents flowing through
it. It should be connected directly to a good quality ground
plane.
V
and has large currents flowing through it. Keep the traces
to the switching components as short as possible to
minimize electromagnetic radiation and voltage spikes.
V
10 F or more. The part goes into undervoltage lockout
when V
switching and pulls the V
R
Load Compensation Function. A common 0.1 F
ceramic capacitor will suffice.
50
SW
IN
CCOMP
(Pin 7): Supply Voltage. Bypass input supply pin with
(Pin 6): This is the collector node of the output switch
75
IN
(Pin 8): Pin for the External Filter Capacitor for
100
1424-5 G11
drops below 2.8V. Undervoltage lockout stops
125
275
250
225
200
175
150
125
100
– 50
C
Minimum Flyback Enable Time
vs Temperature
pin low.
– 25
0
TEMPERATURE ( C)
25
LT1424-5
50
75
sn14245 14245fs
100
1424-5 G12
5
125