参数资料
型号: LTC3531EDD-3#TRPBF
厂商: Linear Technology
文件页数: 3/16页
文件大小: 0K
描述: IC REG BUCK BST SYNC 3V .2A 8DFN
标准包装: 2,500
类型: 降压(降压),升压(升压)
输出类型: 固定
输出数: 1
输出电压: 3V
输入电压: 1.8 V ~ 5.5 V
PWM 型: Burst Mode?
电流 - 输出: 200mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 8-DFN-EP(3x3)
LTC3531/
LTC3531-3.3/LTC3531-3
ELECTRICAL CHARACTERISTICS
The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 3.6V V OUT = 3.3V unless otherwise noted.
PARAMETER
PMOS D R DSON (3.3V Version or Adjustable Version set to 3.3V)
PMOS D R DSON (3V Version)
Peak Current Limit
CONDITIONS
V OUT = 3.1V
V OUT = 2.8V
L = 10 μ H, V IN = 5V
MIN
295
TYP
0.8
0.9
365
MAX
460
UNITS
Ω
Ω
mA
SHDN
SHDN Input Threshold
SHDN Hysteresis
SHDN Leakage Current
V SHDN
0.4
1
60
0.01
1.4
1
V
mV
μA
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: 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 result in device degradation or failure.
Note 3: The LTC3531 is guaranteed to meet performance speci?cations
from 0°C to 70°C. Speci?cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
T A = 25°C unless otherwise speci?ed.
350
300
Maximum I OUT vs V IN
(3.3V Version)
L = 10 μ H
V OUT = 3.3V
450
400
350
I PEAK , I VALLEY , I ZERO vs V IN
L = 10μH
I PEAK
20
18
16
Sleep Currents
I VIN
250
200
300
250
14
12
10
150
200
I VALLEY
8
100
150
100
6
4
I VOUT
50
50
I ZERO
2
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
V IN (V)
3531 G01
V IN (V)
3531 G02
V IN (V)
3531 G03
180
160
140
I IN Short Circuit vs V IN
100
90
80
V OUT Ripple vs C OUT
(3.3V Version)
10μF
3.40
3.35
Load Regulation vs C OUT
(3.3V Version)
10μF
120
70
100
60
3.30
80
60
50
40
30
22μF
3.25
22μF
47μF
40
20
3.20
20
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
10
0
1.5
2
2.5
3
3.5
4
50mA LOAD
4.5 5 5.5
3.15
V IN = 3.6V
0.1 1
10
100
1000
V IN (V)
3531 G04
V IN (V)
3531 G05
LOAD CURRENT (mA)
3521 G06
3531fb
3
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