参数资料
| 型号： | LT3501IFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/30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： | 无 |
| 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 |
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LT3501
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T J = 25°C. V VIN1/2 = 15V, V BST1/2 = open, V RT/SYNC = 2V, V VOUT1/2 = open,
unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Feedback Bias Current Ch 1/Ch 2
Error Amplifier g m Ch 1/Ch 2
V FB1/2 = 0.8V, V VC1/2 = 1V
V VC1/2 = 1V, I VC1/2 = ±5μA
l
l
–250
150
75
275
250
450
nA
μmho
Error Amplifier Gain Ch 1/Ch 2
Error Amplifier to Switch Gain Ch 1/Ch 2
1000
3.3
V/V
A/V
Error Amplifier Source Current Ch 1/Ch 2
Error Amplifier Sink Current Ch 1/Ch 2
Error Amplifier High Clamp Ch 1/Ch 2
Error Amplifier Switching Threshold Ch 1/Ch 2
V FB1/2 = 0.6V, V VC1/2 = 1V
V FB1/2 = 1V, V VC1/2 = 1V
V FB1/2 = 0.7V
V OUT1/2 = 5V, R T /SYNC = 133k
10
15
1.75
0.5
15
20
2.0
0.7
25
30
2.25
1
μA
μA
V
V
Soft-Start Source Current Ch 1/Ch 2
Soft-Start V OH Ch 1/Ch 2
Soft-Start Sink Current Ch 1/Ch 2
Soft-Start V OL Ch 1/Ch 2
Soft-Start to Feedback Offset Ch 1/Ch 2
Soft-Start Sink Current Ch 1/Ch 2 POR
Soft-Start POR Threshold Ch 1/Ch 2
Soft-Start Switching Threshold Ch 1/Ch 2
Power Good Leakage Ch 1/Ch 2
Power Good Threshold Ch 1/Ch 2
Power Good Hysteresis Ch 1/Ch 2
Power Good Sink Current Ch 1/Ch 2
Power Good Shutdown Sink Current Ch 1/Ch 2
R T /SYNC Reference Voltage
Switching Frequency
Switching Phase Angle Ch A to Ch B
V FB1/2 = 0.6V, V SS1/2 = 0.4V
V FB1/2 = 0.9V
V FB1/2 = 0.6V, V SS1/2 = 1V
V FB1/2 = 0V
V VC1/2 = 1V, V SS1/2 = 0.4V
V SS1/2 = 0.4V (Note 4), V VC = 1V
V FB1/2 = 0V (Note 4)
V FB1/2 = 0V
V FB1/2 = 0.9V, V PG1/2 = 25V, V VIN1/2 = 25V
V FB1/2 Rising, PG1/2 = 20k to 5V
V FB1/2 Falling, PG1/2 = 20k to 5V
V FB1/2 = 0.65V, V PG1/2 = 0.4V
V VIN1/2 = 2V, V FB1/2 = 0V, V PG1/2 = 0.4V
V FB1/2 = 0.9V, I RT/SYNC = –40μA
R T /SYNC = 133k, V FB1/2 = 0.6V, V BST1/2 = V SW + 3V
R T /SYNC = 15.4k, V FB1/2 = 0.6V, V BST1/2 = V SW + 3V
R T /SYNC = 133k, V FB1/2 = 0.6V, V BST1/2 = V SW + 3V
l
l
l
2
1.9
200
50
–16
0.5
55
30
87
20
400
10
0.93
200
1.2
120
3
2
600
80
0
1.5
80
50
0
90
30
800
50
0.975
250
1.5
180
4.2
2.4
1000
125
16
2
105
70
1
93
50
1200
100
1
300
1.8
210
μA
V
μA
mV
mV
mA
mV
mV
μA
%
mV
μA
μA
V
kHz
MHz
Deg
Minimum Boost for 100% Duty Cycle Ch 1/Ch 2 V FB1/2 = 0.7V, I RT/SYNC = –35μA (Note 5), V OUT = 0V
1.7
2
V
SYNC Frequency Range
V BST1/2 = V SW + 3V
250
1500
kHz
SYNC Switching Phase Angle Ch A to Ch B
IND + V OUT Current Ch 1/Ch 2
IND to V OUT Maximum Current Ch 1/Ch 2
Switch Leakage Current Ch 1/Ch 2
Switch Saturation Voltage Ch 1/Ch 2
Boost Current Ch 1/Ch 2
Minimum Boost Voltage Ch 1/Ch 2
SYNC Frequency = 250kHz, V BST1/2 = V SW + 3V
V VOUT1/2 = 0V, V FB1/2 = 0.9V
V VOUT1/2 = 5V
V VOUT1/2 = 0.5V (Note 6), V FB1/2 = 0.7V, V BST1/2 = 20V
V VOUT1/2 = 5V (Note 6), R T /SYNC = 133k, V BST1/2 = 20V
V SW1/2 = 0V, V VIN1/2 = 25V
I SW1/2 = 3A, V BST1/2 = 20V, V FB1/2 = 0.7V
I SW1/2 = 3A, V BST1/2 = 20V, V FB1/2 = 0.7V
I SW1/2 = 3A, V BST1/2 = 20V, V FB1/2 = 0.7V
l
l
120
40
3.25
3.5
25
180
70
0
4
4
0
250
60
1.4
210
100
1
5
5
50
600
100
2.5
Deg
μA
μA
A
A
μA
mV
mA
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3501EFE is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3501IFE is guaranteed and tested over the full –40°C to 125°C operating
junction temperature range.
Note 3: Minimum input voltage is defined as the voltage where internal
bias lines are regulated so that the reference voltage and oscillator remain
constant. Actual minimum input voltage to maintain a regulated output will
depend upon output voltage and load current. See Applications Information.
3501fd
3
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