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参数资料
| 型号： | LTC3421EUF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 1.5A 24QFN |
| 标准包装： | 91 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.4 V ~ 5.25 V |
| 输入电压： | 0.5 V ~ 4.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 100kHz ~ 3MHz |
| 电流 - 输出： | 1.5A |
| 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： | 24-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3421
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 1.2V, V OUT = 3.3V, R T = 28k, unless otherwise noted.
PARAMETER
Frequency Accuracy
CONDITIONS
q
MIN
0.85
TYP
1
MAX
1.15
UNITS
MHz
SYNC Input High
SYNC Input Low
q
q
2.2
0.8
V
V
SYNC Input Current
q
0.01
1
μ A
ENB Input High
ENB Input Low
ENB Input Current
SHDN Input High
V OUT = 0V (Initial Start-Up)
q
q
q
1.2
1.00
0.4
1
V
V
μ A
V
SHDN Input Low
V OUT > 2.4V
0.65
0.25
V
V
SHDN Input Current
q
0.01
1
μ A
REF Output Voltage
REF Output Current Range
q
1.183
–100
1.22
1.257
8
V
μ A
Error Amp Transconductance
45
μ s
LBI Threshold
Falling Edge
q
0.58
0.6
0.62
V
LBI Input Current
LBO Low Voltage
LBO Leakage
V IN = 0V, I SINK = 1mA
V IN = 0V, I SINK = 20mA
V PGOOD = 5.5V
q
0.01
12.0
0.25
0.01
1
50
0.5
1
μ A
mV
V
μ A
SS Current Source
BURST Threshold Voltage
V SS = 1V
Falling Edge
1.2
0.87
2.4
0.97
5
1.07
μ A
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3421E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications over the 40 ° C to 85 ° C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Current is measured into the V OUTS pin since the supply current is
Note 4: Once V OUT is greater than 2.4V, the IC is not dependent on the V IN
supply.
Note 5: 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.
bootstrapped to the output. The current will reflect to the input supply by
(V OUT /V IN ) ? Efficiency. The outputs are not switching.
3421f
3
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