参数资料
型号: LT3501EFE#TRPBF
厂商: Linear Technology
文件页数: 4/30页
文件大小: 0K
描述: IC REG BUCK ADJ 3A DL 20TSSOP
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.8 V ~ 23.8 V
输入电压: 3.1 V ~ 25 V
PWM 型: 电流模式
频率 - 开关: 250kHz ~ 1.5MHz
电流 - 输出: 3A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 20-TSSOP-EP
LT3501
ELECTRICAL CHARACTERISTICS
Note 4: An internal power-on reset (POR) latch is set on the positive
transition of the SHDN pin through its threshold. The output of the latch
activates current sources on each SS pin which typically sink 1.5mA,
discharging the SS capacitor. The latch is reset when both SS pins are
driven below the soft-start POR threshold or the SHDN pin is taken below
its threshold.
Note 5: To enhance dropout operation, the output switch will be turned off
for the minimum off-time only when the voltage across the boost capacitor
drops below the minimum boost for 100% duty cycle threshold.
Note 6: The IND to V OUT maximum current is defined as the value of
current flowing from the IND pin to the V OUT pin which resets the switch
latch when the V C pin is at its high clamp.
Note 7: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 8: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
TYPICAL PERFORMANCE CHARACTERISTICS
0.816
Feedback Voltage vs Temperature
1.05
R T /SYNC Voltage vs Temperature
3.0
Shutdown Threshold and Minimum
Input Voltage vs Temperature
0.811
0.806
0.801
1.03
1.01
2.5
2.0
1.5
MINIMUM INPUT
VOLTAGE
SHUTDOWN
THRESHOLD
VOLTAGE
0.99
0.796
1.0
0.791
0.97
0.5
0.786
–50 –25
0
25
50
75
100
125
0.95
–50
–25
0
25
50
75
100
125
0
–50 –25
0
25
50
75
100
125
16
TEMPERATURE (°C)
Shutdown Quiescent Current
vs Temperature
3501 G02
4.0
TEMPERATURE (°C)
Soft-Start Source Current
vs Temperature
3501 G03
5.0
TEMPERATURE (°C)
3501 G04
IND to V OUT Maximum Current
vs Temperature
14
12
V VIN1
3.8
3.6
3.4
4.8
4.6
4.4
10
8
6
3.2
3.0
2.8
4.2
4.0
3.8
V OUT = 5V
V OUT = 0V
4
2
V VIN2
2.6
2.4
2.2
3.6
3.4
3.2
0
–50 –25
0
25
50
75
100
125
2.0
–50
–25
0
25
50
75
100
125
3.0
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
3501 G05
TEMPERATURE (°C)
3501 G06
TEMPERATURE (°C)
3501 G07
3501fd
4
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