参数资料
型号: LT1374CS8#TRPBF
厂商: Linear Technology
文件页数: 4/32页
文件大小: 0K
描述: IC REG BUCK ADJ 4.5A 8SOIC
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 2.42 V ~ 21.5 V
输入电压: 5 V ~ 25 V
PWM 型: 电流模式
频率 - 开关: 500kHz
电流 - 输出: 4.5A
同步整流器:
工作温度: 0°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
供应商设备封装: 8-SOIC
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 IN supply current is the current drawn when the BIAS pin is held
at 5V and switching is disabled. If the BIAS pin is unavailable or open
circuit, the sum of V IN and BIAS supply currents will be drawn by the V IN
pin.
Note 7: Switch on resistance is calculated by dividing V IN to V SW voltage
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 OUT /2.42.
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.
by the forced current (4.5A). See Typical Performance Characteristics for
the graph of switch voltage at other currents.
TYPICAL PERFOR A CE CHARACTERISTICS
500
Switch Voltage Drop
6.5
Switch Peak Current Limit
2.430
Feedback Pin Voltage
450
400
350
300
250
200
150
125 ° C
25 ° C
– 40 ° C
6.0
5.5
5.0
4.5
4.0
MINIMUM
TYPICAL
2.425
2.420
2.415
100
50
3.5
0
0
1
2
3
4
5
3.0
0
20
40
60
80
100
2.410
– 50
–25
0
25
50
75
100
125
SWITCH CURRENT (A)
Shutdown Pin Bias Current
1374 G18
DUTY CYCLE (%)
1374 G02
Standby and Shutdown Thresholds
TEMPERATURE ( ° C)
Shutdown Supply Current
1374 G03
500
400
CURRENT REQUIRED TO FORCE SHUTDOWN
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW μ A
2.40
2.36
STANDBY
25
20
V SHDN = 0V
300
200
8
AT 2.38V STANDBY THRESHOLD
2.32
0.8
START-UP
15
10
4
(CURRENT FLOWS OUT OF PIN)
0.4
SHUTDOWN
5
0
–50 –25
0
25
50
75
100
125
0
–50 –25
0
25
50
75
100
125
0
0
5
10 15
20
25
TEMPERATURE ( ° C)
1374 G04
JUNCTION TEMPERATURE ( ° C)
1374 G05
INPUT VOLTAGE (V)
1374 G06
1374fd
4
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