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参数资料
| 型号： | LT3473EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1A 8DFN |
| 标准包装： | 121 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 34V |
| 输入电压： | 2.2 V ~ 16 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 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： | 管件 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3473/LT3473A
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T A = 25 ° C.
V IN = 3V, SHDN = 3V, CTRL = 2V, unless otherwise specified.
PARAMETER
Switching Frequency
Maximum Duty Cycle
CONDITIONS
●
MIN
0.9
88
TYP
1.2
92
MAX
1.4
UNITS
MHz
%
Switch Current Limit
Switch V CESAT
I SW = 100mA
●
1.2
45
A
mV
Switch Leakage Current
V SW = 5V
0.1
5
μ A
Schottky Forward Drop
Schottky Leakage Current
Disconnect PNP Voltage Drop
Disconnect PNP Quiescent Current
I D = 100mA
CAP = 36V, SW = 0V
I OUT = 100 μ A, CAP = 20V
I OUT = 50mA, CAP = 20V
CAP = 20V
0.45
80
250
1.2
4
V
μ A
mV
mV
μ A
Disconnect PNP Leakage Current
SHDN = OUT = 0V, CAP = 20V
0.01
0.1
μ A
LTC3473A Only
NPN1 Voltage Drop
NPN1 Beta
NPN2 Voltage Drop
NPN2 Beta
INE1 = 1mA
INE1 = 1mA
INE2 = 1mA
INE2 = 1mA
60
60
0.8
0.8
V
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3473EDD and LT3473AEDE are 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: Failure to correctly solder the Exposed Pad of the package to the
PC board will result in a thermal resistance much higher than 40 ° C.
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation (Feedback Taken
T A = 25 ° C unless otherwise noted.
from CAP)
Feedback Voltage
PGOOD Threshold Voltage
20.20
20.00
V IN = 3.6V
1.4
1.2
1.4
1.2
CAP
19.80
19.60
19.40
19.20
OUT
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
19.00
0
20
40 60 80
100
0
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
0
0
0.5
1
1.5
2
LOAD CURRENT (mA)
3473 G01
CTRL VOLTAGE (V)
3473 G02
CTRL VOLTAGE (V)
3473 G03
3473f
3
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