参数资料
型号: LT3509EMSE#PBF
厂商: Linear Technology
文件页数: 3/24页
文件大小: 0K
描述: IC REG BUCK ADJ 0.7A DL 16MSOP
标准包装: 37
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.8 V ~ 35.3 V
输入电压: 3.6 V ~ 36 V
PWM 型: 电流模式
频率 - 开关: 260kHz ~ 2.15MHz
电流 - 输出: 700mA
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: 16-TFSOP(0.118",3.00mm 宽)裸露焊盘
包装: 管件
供应商设备封装: 16-MSOP,裸露焊盘
产品目录页面: 1332 (CN2011-ZH PDF)

LT3509
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C, V IN = 12V. (Note 3)
PARAMETER
V IN Undervoltage Lockout
CONDITIONS
MIN
TYP
3.3
MAX
3.6
UNITS
V
V IN Overvoltage Lockout
Input Quiescent Current
Input Shutdown Current
Not Switching V FB > 0.8V
V(RUN/SS[1,2]) < 0.3V
37
38.5
1.9
9
40
2.2
15
V
mA
μA
Feedback Pin Voltage
Reference Voltage Line Regulation
RUN/SS Shutdown Threshold
3.6V < V IN < 36V
l
0.784
0.4
0.8
0.01
0.6
0.816
0.8
V
%/V
V
RUN/SS Voltage for Full I OUT
2
V
RUN/SS Pin Pull-up Current
0.7
1
1.3
μA
Feedback Pin Bias Current (Note 4)
V FB = 0.8V
l
90
500
nA
Switch Current Limit
l
1.05
1.4
1.9
A
DA Comparator Current Threshold
Boost Pin Current
Switch Leakage Current
Switch Saturation Voltage
Minumum Boost Voltage above Switch
Boost Diode Forward Voltage
Boost Diode Leakage
I SW = 0.9A
I SW = 0.9A (Note 5)
I SW = 0.9A
I BD = 20mA
V R = 30V
0.7
0.95
22
0.01
0.32
1.5
0.7
0.1
1.2
36
1.0
2.2
0.9
5
A
mA
μA
V
V
V
μA
Switching Frequency
R T = 40.2kΩ
R T = 180kΩ
R T = 14.1kΩ
l
0.92
237
2.0
1.0
260
2.15
1.08
290
2.5
MHz
kHz
MHz
Sync Pin Input Threshold
1.0
V
Switch Minimum Off-Time
l
80
150
ns
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 . Absolute Maximum Voltage at the V IN pin is 60V for non-repetitive
1 second transients and 36V for continuous operation.
Note 3. The LT3509E is guaranteed to meet performance speci?cations from
0°C to 125°C junction temperature. Speci?cations over the –40°C to 125°C
operating junction temperature range are assured by design, characterization
and correlation with statistical process controls. The LT3509I is guaranteed
over the full –40°C to 150°C operating junction temperature range. High
junction temperatures degrade operating lifetimes. Operating lifetime is
derated at junction temperatures greater than 125°C.
Note 4. Current ?ows out of pin.
Note 5 . Switch Saturation Voltage is guaranteed by design.
Note 6. This IC includes overtemperature protection that is intended to protect
the device during momentary overload conditions. Junction temperature will
exceed the maximum operating temperature when overtemperature protection
is active. Continuous operation above the speci?ed maximum operating
junction temperature may impair device reliability.
over the full –40°C to 125°C temperature range. The LT3509H is guaranteed
3509fc
3
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