参数资料
| 型号： | LT3508IFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.4A DL 16TSSOP |
| 标准包装： | 95 |
| 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： | 3.7 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 920kHz ~ 1.06MHz |
| 电流 - 输出： | 1.4A |
| 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： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-TSSOP-EP |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3508
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 unless otherwise noted. (Note 2)
PARAMETER
Minimum Operating Voltage, V IN1
Minimum Operating Voltage, V IN2
V IN1 Quiescent Current
V IN2 Quiescent Current
Shutdown Current (V IN1 + V IN2 )
CONDITIONS
V IN1 = 12V
Not Switching
Not Switching
V SHDN = 0.3V
l
l
MIN
TYP
3.4
2.5
4.3
320
0.1
MAX
3.7
3.0
5.2
500
2
UNITS
V
V
mA
μA
μA
FB Voltage
l
0.790
0.784
0.800
0.814
0.816
V
V
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
V FB = 0.800V, V C = 0.5V
5V < V IN < 40V
l
50
0.01
300
nA
%/V
Error Amp Transconductance
Error Amp Voltage Gain
V C to Switch Current Gain
300
600
2.5
μS
V/V
A/V
Switching Frequency
Switching Phase
Maximum Duty Cycle (Note 4)
R T = 33.2k
R T = 33.2k
R T = 33.2k
l
l
0.92
150
84
1
180
90
1.06
210
MHz
Deg
%
R T = 7.50k
R T = 169k
80
98
%
%
Foldback Frequency
R T = 33.2k, V FB = 0V
120
kHz
Switch Current Limit (Note 5)
Duty Cycle = 15%
l
2.0
2.6
3.2
A
Switch V CESAT
I SW = 1.5A
300
mV
Switch Leakage Current
Minimum Boost Voltage
0.01
1.7
1
2.5
μA
V
Boost Pin Current
I SW = 1.5A, V BOOST = 17V
35
50
mA
TRACK/SS Pin Current
PG Threshold Offset
V TRACK/SS = 0V
V FB Rising
0.8
56
1.2
75
2.2
110
μA
mV
PG Voltage Output Low
PG Pin Leakage
SHDN Threshold Voltage
V FB = 0.6V, I PG = 250μA
V PG = 2V
2.53
0.13
0.01
2.63
0.4
1
2.73
V
μA
V
SHDN Input Current (Note 6)
SHDN Threshold Current Hysteresis
SYNC Threshold Voltage
SYNC Input Frequency
V SHDN = 60mV Above Threshold Voltage
6
5.5
1
0.25
8
7.5
1.25
10
9.5
1.5
2.5
μA
μA
V
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 LT3508E 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
LT3508I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3508H 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 3: Current ?ows out of pin.
Note 4: V BOOST =12V. Circuitry increases the maximum duty cycle of the
LT3508 when V BOOST > V IN + 2.5V. See Minimum Operating Voltage in the
Applications Information section for details.
Note 5: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at higher duty cycles.
Note 6: Current ?ows into pin.
Note 7: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
range when overtemperature protection is active. Continuous operation
above the speci?ed maximum operating junction temperature may impair
device reliability.
3508fd
3
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相关代理商/技术参数 |
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| LT3508IFE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 1.4A Step-Down Switching Regulator |
| LT3508IUF#PBF | 功能描述:IC REG BUCK ADJ 1.4A DL 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3508IUF#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 1MHZ Q 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 1MHZ, QFN-24 |
| LT3508IUF#TRPBF | 功能描述:IC REG BUCK ADJ 1.4A DL 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
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