LT1374IS8-SYNC Linear Technology, LT1374IS8-SYNC Datasheet - Page 4

• Manufacturer Part Number: LT1374IS8-SYNC
• Description: IC SW REG 4.5A ADJ STP-DWN 8SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT1374IS8-SYNC

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.42 ~ 21.5 V
• Current - Output: 4.5A
• Frequency - Switching: 500kHz
• Voltage - Input: 5 ~ 25 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: -

LT1374
ELECTRICAL CHARACTERISTICS
Note 5: Boost current is the current flowing into the boost pin with the pin
held 5V above input voltage. It flows only during switch on time.
Note 6: V
at 5V and switching is disabled. If the BIAS pin is unavailable or open
circuit, the sum of V
pin.
Note 7: Switch on resistance is calculated by dividing V
by the forced current (4.5A). See Typical Performance Characteristics for
the graph of switch voltage at other currents.
TYPICAL PERFOR A CE CHARACTERISTICS
4
500
400
300
200
500
450
400
350
300
250
200
150
100
50
8
4
0
0
–50
0
Switch Voltage Drop
Shutdown Pin Bias Current
CURRENT REQUIRED TO FORCE SHUTDOWN
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW µA
IN
–25
supply current is the current drawn when the BIAS pin is held
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
1
SWITCH CURRENT (A)
0
TEMPERATURE (°C)
IN
2
and BIAS supply currents will be drawn by the V
25
50
3
125°C
25°C
75
W
– 40°C
4
100
1374 G04
1374 G18
U
125
5
2.40
2.36
2.32
IN
0.8
0.4
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
to V
0
–50
0
Standby and Shutdown Thresholds
Switch Peak Current Limit
SW
–25
voltage
20
JUNCTION TEMPERATURE (°C)
0
IN
MINIMUM
DUTY CYCLE (%)
SHUTDOWN
40
25
START-UP
STANDBY
Note 8: Transconductance and voltage gain refer to the internal amplifier
exclusive of the voltage divider. To calculate gain and transconductance,
refer to the SENSE pin on the fixed voltage parts. Divide values shown by
the ratio V
Note 9: Slope compensation is the current subtracted from the switch
current limit at 80% duty cycle. See Maximum Output Load Current in the
Applications Information section for further details.
50
60
75
TYPICAL
OUT
80
100
1374 G05
/2.42.
1374 G02
125
100
2.430
2.425
2.420
2.415
2.410
25
20
15
10
5
0
– 50
0
Feedback Pin Voltage
Shutdown Supply Current
V
SHDN
–25
5
= 0V
0
TEMPERATURE (°C)
INPUT VOLTAGE (V)
10
25
50
15
75
20
100
1374 G03
1374 G06
1374fd
125
25