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| 型号： | LTC3411EMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 10MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.63 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1.25A |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3411
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 = 3.3V, R T = 324k unless otherwise speci?ed. (Note 2)
SYMBOL
V IN
PARAMETER
Operating Voltage Range
CONDITIONS
MIN
2.625
TYP
MAX
5.5
UNITS
V
I FB
Feedback Pin Input Current
±0.1
μA
V FB
Δ V LINEREG
Δ V LOADREG
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
(Note 3)
V IN = 2.7V to 5V
I TH = 0.36, (Note 3)
I TH = 0.84, (Note 3)
l
l
l
0.784
0.8
0.04
0.02
–0.02
0.816
0.2
0.2
–0.2
V
%/V
%
%
g m(EA)
Error Ampli?er Transconductance
I TH Pin Load = ±5μA (Note 3)
800
μS
I S
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
V FB = 0.75V, SYNC/MODE = 3.3V
V SYNC/MODE = 3.3V, V FB = 1V
V SHDN/RT = 3.3V
240
62
0.1
350
100
1
μA
μA
μA
V SHDN/RT
Shutdown Threshold High
Active Oscillator Resistor
V IN – 0.6
324k
V IN – 0.4
1M
V
Ω
f OSC
Oscillator Frequency
R T = 324k
0.85
1
1.15
MHz
(Note 7)
4
MHz
f SYNC
I LIM
Synchronization Frequency
Peak Switch Current Limit
(Note 7)
I TH = 1.3
0.4
1.6
2
4
MHz
A
R DS(ON)
Top Switch On-Resistance (Note 6)
V IN = 3.3V
0.11
0.15
Ω
Bottom Switch On-Resistance (Note 6) V IN = 3.3V
0.11
0.15
Ω
I SW(LKG)
Switch Leakage Current
V IN = 6V, V ITH/RUN = 0V, V FB = 0V
0.01
1
μA
V UVLO
PGOOD
Undervoltage Lockout Threshold
Power Good Threshold
V IN Ramping Down
V FB Ramping Up, SHDN/R T = 1V
2.375
2.5
6.8
2.625
V
%
V FB Ramping Down, SHDN/R T = 1V
–7.6
%
R PGOOD
Power Good Pull-Down On-Resistance
118
200
Ω
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 LTC3411E is guaranteed to meet speci?ed performance from
0°C to 85°C. Speci?cations over the –40°C to 85°C operating termperature
range are assured by design, characterization and correlation with
statistical process controls. The LTC3411I is guaranteed to meet speci?ed
performance over the full –40°C to 125°C operating temperature range.
Note 3: The LTC3411 is tested in a feedback loop which servos V FB to the
midpoint for the error ampli?er (V ITH = 0.6V).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T J is calculated from the ambient T A and power dissipation P D
according to the following formula:
LTC3411DD: T J = T A + (P D ? 43°C/W)
LTC3411MS: T J = T A + (P D ? 120°C/W)
Note 6: Switch on-resistance is guaranteed by correlation to wafer level
measurements.
Note 7: 4MHz operation is guaranteed by design but not production tested
and is subject to duty cycle limitations (see Applications Information).
Note 8: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the speci?ed maximum operating junction
temperature may impair device reliability.
3411fb
3
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