参数资料
| 型号： | LT3742EUF#PBF |
| 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： | 91 |
| 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： | 管件 |
| 产品目录页面： | 1332 (CN2011-ZH PDF) |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3742EUF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual, 2-Phase Step-Down Switching Controller |
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| LT3743EFE#PBF | 功能描述:IC LED DVR HP CONST CURR 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
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