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参数资料
| 型号： | LT3742EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 24-QFN |
| 标准包装： | 2,500 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 560kHz |
| 占空比： | 100% |
| 电源电压： | 4 V ~ 30 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
LT3742
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications ar e at T A = 25°C. V IN = 5V unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FB Pin Bias Current
FB Pin Voltage Matching
Error Amplifier Transconductance
Error Amplifier Voltage Gain
V C Pin Source Current
V C Pin Sink Current
Controller Switching Frequency
Switching Phase
V FB = 0.8V, V C = 0.4V
V FB = 0.6V
V FB = 1V
–4
440
50
0
250
500
15
15
500
180
200
4
560
nA
mV
μmho
V/V
μA
μA
kHz
Deg
Maximum Current Sense Voltage
V SENSE
– = 3.3V
l
50
60
70
mV
Current Sense Matching
Current SENSE Pins Total Current
Gate Rise Time
Gate Fall Time
Between Controllers
SENSE – , SENSE + = 0V
SENSE – , SENSE + = 3.3V
C LOAD = 3300pF
C LOAD = 3300pF
±5
–1.0
40
40
60
%
mA
μA
ns
ns
Gate On Voltage (V G – V SW )
Gate Off Voltage (V G – V SW )
PG Pin Voltage Low
Lower PG Trip Level (Relative to V FB )
Lower PG Trip Level (Relative to V FB )
Upper PG Trip Level (Relative to V FB )
Upper PG Trip Level (Relative to V FB )
PG Pin Leakage Current
PG Pin Sink Current
V BIAS = 12V
V BIAS = 12V
I PG = 100μA
V FB Increasing
V FB Decreasing
V FB Increasing
V FB Decreasing
V PG = 2V
V PG = 0.5V
6.0
–7
–10
7
4
200
6.7
0.4
0.20
–10
–13
10
7
0.1
500
7.0
0.75
0.5
–13
–16
13
10
V
V
V
%
%
%
%
μA
μA
Bias Pin Voltage
SWB Pin Current Limit
SWB Pin Leakage Current
Bias Supply Switching Frequency
V SWB = 12V
V IN + 6.6
250
0.88
V IN + 7
340
0.01
1.0
V IN + 7.7
500
1
1.12
V
mA
μA
MHz
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 LT3742E is guaranteed to meet performance specifications
from 0°C to 125°C operating junction temperature range. Specifications
over the – 40°C to 125°C operating junction temperature range are
assured by design, characterization and correlation with statistical process
controls.
3742fa
3
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