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参数资料
| 型号： | LT3742EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/26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
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V IN Voltage ................................................................30V
UVLO Voltage............................................................30V
PG1, PG2 Voltage ......................................................30V
SWB, BIAS Voltage ...................................................40V
SENSE1 + , SENSE2 + Voltage ......................................30V
SENSE1 – , SENSE2 – Voltage ......................................30V
RUN/SS1, RUN/SS2 Voltage .......................................6V
FB1, FB2 Voltage .........................................................6V
V C1 , V C2 Voltage ..........................................................6V
Junction Temperature ........................................... 125°C
Operating Junction Temperature Range
(Note 2) .................................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
24 23 22 21 20 19
G1 1 18 V C1
V IN 2 17 PG1
UVLO 3 16 RUN/SS1
25
BIAS 4 15 RUN/SS2
SWB 5 14 PG2
G2 6 13 V C2
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
T JMAX = 125°C, θ JA = 36°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3742EUF#PBF
TAPE AND REEL
LT3742EUF#TRPBF
PART MARKING
3742
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C (Note 2)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 5V unless otherwise specified.
PARAMETER
Minimum Operating Input Voltage
Quiescent Current
Shutdown Current
CONDITIONS
V UVLO = 1.5V
V RUN/SS1 = V RUN/SS2 = V FB1 = V FB2 = 1V
V RUN/SS1 = V RUN/SS2 = 0V
l
MIN
TYP
3.5
5.0
20
MAX
4.0
7.0
35
UNITS
V
mA
μA
UVLO Pin Threshold
UVLO Pin Hysteresis Current
UVLO Pin Voltage Rising
V UVLO = 1V, Current Flows Into Pin
l
1.20
1.8
1.25
3
1.28
4
V
μA
RUN/SS Pin Threshold
0.2
0.5
V
RUN/SS Pin Charge Current
FB Pin Voltage
FB Pin Voltage Line Regulation
V RUN/SS = 0V
V IN = 5V to 30V
l
0.5
0.788
1
0.800
0.01
1.5
0.812
μA
V
%/V
3742fa
2
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