参数资料
| 型号： | LTC3411AIMS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 10MSOP |
| 标准包装： | 2,500 |
| 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： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.5MHz |
| 电流 - 输出： | 1.25A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP |
LTC3411A
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T A = 25°C, V IN = 3.6V, R T = 125k unless otherwise specified. (Note 2)
SYMBOL
I S
V SHDN/RT
f OSC
f SYNC
I LIM
R DS(ON)
I SW(LKG)
V UVLO
PGOOD
R PGOOD
PGOOD Blanking
V SYNC-MODE
t SOFT-START
PARAMETER
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
Shutdown Threshold High Active
Oscillator Resistor
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Undervoltage Lockout Threshold
Power Good Threshold
Power Bad Threshold
Power Good Pull-Down On-Resistance
Pulse Skip
Force Continuous
Burst
CONDITIONS
V SYNC/MODE = 3.6V, V FB = 0.75V
V SYNC/MODE = 3.6V, V FB = 0.84V
V SHDN/RT = 3.6V
R T = 125k
(Note 7)
(Note 7)
V FB = 0.5V
MS Package
DD Package (Note 6)
MS Package
DD Package (Note 6)
V IN = 5.5V, V SHDN/RT = 5.5V, V SW = 0V
or 5.5V
V IN Ramping Down
V FB Ramping Up from 0.68V to 0.8V
V FB Ramping Down from 0.92V to 0.8V
V FB Ramping Down from 0.8V to 0.68V
V FB Ramping Up from 0.8V to 0.9V
V FB Step from 0V to 0.8V
V FB Step from 0.8V to 0V
V IN = 2.5V to 5.5V
V IN = 2.5V to 5.5V
V IN = 2.5V to 5.5V
10% to 90% of Regulation
MIN
2.25
0.4
1.6
1.8
–5
5
1.2
V IN – 0.6
0.5
TYP
330
40
0.1
V IN – 0.6
125k
2.5
2.1
0.15
0.15
0.13
0.13
0.01
2.1
–7
7
–10
10
15
40
105
0.8
MAX
450
60
1
V IN – 0.4
1M
2.8
4
4
2.6
0.18
0.16
1
2.4
–12
12
30
0.6
V IN – 1.1
1.0
UNITS
μA
μA
μA
V
Ω
MHz
MHz
MHz
A
Ω
Ω
Ω
Ω
μA
V
%
%
%
%
Ω
μs
μs
V
V
V
ms
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 LTC3411A is tested under pulsed load conditions such that
T J ≈ T A . The LTC3411AE is guaranteed to meet performance specifications
from 0°C to 85°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3411AI is guaranteed over the full –40°C to 125°C operating junction
temperature range. The maximum ambient temperature consistent with
these specifications is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
Note 3: The LTC3411A is tested in a feedback loop which servos V FB to the
midpoint for the error amplifier (V ITH = 0.7V).
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 formulas:
LTC3411AEDD: T J = T A + (P D ? 43°C/W)
LTC3411AEMS: T J = T A + (P D ? 120°C/W)
Note 6: For the DD package, switch on-resistance is sampled at wafer level
measurements and assured by design, characterization and correlation
with statistical process controls.
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 specified maximum operating junction
temperature may impair device reliability.
3411afc
For more information www.linear.com/LTC3411A
3
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