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| 型号： | LT3021ES8-1.8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V .5A 8-SOIC |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 最高 10V |
| 电压 - 压降（标准）： | 0.155V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 550mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
ELECTRICAL CHARACTERISTICS
The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T J = 25°C.
SYMBOL
Minimum Input Voltage
(Notes 5,14)
CONDITIONS
I LOAD = 500mA, T J > 0°C
I LOAD = 500mA, T J < 0°C
MIN
TYP
0.9
0.9
MAX
1.05
1.10
UNITS
V
V
ADJ Pin Voltage (Notes 4, 5)
V IN = 1.5V, I LOAD = 1mA
1.15V < V IN < 10V, 1mA < I LOAD < 500mA
l
196
193
200
200
204
206
mV
mV
Regulated Output Voltage
(Note 4)
Line Regulation (Note 6)
Load Regulation (Note 6)
Dropout Voltage (Notes 7, 12)
LT3021-1.2
LT3021-1.5
LT3021-1.8
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
I LOAD = 10mA
I LOAD = 10mA
V IN = 1.5V, I LOAD = 1mA
1.5V < V IN < 10V, 1mA < I LOAD < 500mA
V IN = 1.8V, I LOAD = 1mA
1.8V < V IN < 10V, 1mA < I LOAD < 500mA
V IN = 2.1V, I LOAD = 1mA
2.1V < V IN < 10V, 1mA < I LOAD < 500mA
ΔV IN = 1.15V to 10V, I LOAD = 1mA
ΔV IN = 1.5V to 10V, I LOAD = 1mA
ΔV IN = 1.8V to 10V, I LOAD = 1mA
ΔV IN = 2.1V to 10V, I LOAD = 1mA
V IN = 1.15V, ΔI LOAD = 1mA to 500mA
V IN = 1.5V, ΔI LOAD = 1mA to 500mA
V IN = 1.8V, ΔI LOAD = 1mA to 500mA
V IN = 2.1V, ΔI LOAD = 1mA to 500mA
l
l
l
l
l
l
l
l
1.176
1.157
1.470
1.447
1.764
1.737
–1.75
–10.5
–13
–15.8
–2
–6
–7.5
–9
1.200
1.200
1.500
1.500
1.800
1.800
0
0
0
0
0.4
1
1.5
2
45
1.224
1.236
1.530
1.545
1.836
1.854
+1.75
10.5
13
15.8
2
6
7.5
9
75
110
V
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
I LOAD = 500mA
I LOAD = 500mA
l
155
190
285
mV
mV
GND Pin Current
V IN = V OUT(NOMINAL) + 0.4V
(Notes 8, 12)
Output Voltage Noise
ADJ Pin Bias Current
I LOAD = 0mA
I LOAD = 10mA
I LOAD = 100mA
I LOAD = 500mA
C OUT = 4.7μF, I LOAD = 500mA, BW = 10Hz to 100kHz, V OUT = 1.2V
V ADJ = 0.2V, V IN = 1.2V (Notes 6, 9)
l
l
110
920
2.25
6.20
300
20
250
10
50
μA
μA
mA
mA
μV RMS
nA
Shutdown Threshold
SHDN Pin Current (Note 10)
Quiescent Current in Shutdown
Ripple Rejection (Note 6)
V OUT = Off to On
V OUT = On to Off
V SHDN = 0V, V IN = 10V
V SHDN = 10V, V IN = 10V
V IN = 6V, V SHDN = 0V
V IN – V OUT = 1V, V RIP = 0.5V P-P , f RIPPLE = 120Hz,
LT3021
l
l
l
l
0.25
0.61
0.61
3
3
70
0.9
±1
9.5
9
V
V
μA
μA
μA
dB
I LOAD = 500mA
LT3021-1.2
V IN – V OUT = 1V, V RIPPLE = 0.5V P-P , f RIPPLE = 120Hz,
60
dB
I LOAD = 500mA
LT3021-1.5
V IN – V OUT = 1V, V RIPPLE = 0.5V P-P , f RIPPLE = 120Hz,
58
dB
I LOAD = 500mA
LT3021-1.8
V IN – V OUT = 1V, V RIPPLE = 0.5V P-P , f RIPPLE = 120Hz,
56
dB
I LOAD = 500mA
Current Limit (Note 12)
Input Reverse Leakage Current
V IN = 10V, V OUT = 0V
V IN = V OUT(NOMINAL) + 0.5V, ΔV OUT = –5%
V IN = –10V, V OUT = 0V
l
550
1.8
1
20
A
mA
μA
Reverse Output Current
(Notes 11, 13)
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
V OUT = 1.2V, V IN = 0V
V OUT = 1.2V, V IN = 0V
V OUT = 1.5V, V IN = 0V
V OUT = 1.8V, V IN = 0V
0.5
10
10
10
5
15
15
15
μA
μA
μA
μA
3021fc
4
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