参数资料
型号: ADP151AUJZ-1.5-R7
厂商: Analog Devices Inc
文件页数: 14/24页
文件大小: 0K
描述: IC REG LDO 1.5V .2A 5TSOT
标准包装: 1
稳压器拓扑结构: 正,固定式
输出电压: 1.5V
输入电压: 2.2 V ~ 5.5 V
稳压器数量: 1
电流 - 输出: 200mA(最小值)
电流 - 限制(最小): 220mA
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: SOT-23-5 细型,TSOT-23-5
供应商设备封装: TSOT-23-5
包装: 标准包装
其它名称: ADP151AUJZ-1.5-R7DKR
ADP151
Figure 34 through Figure 38 show the typical performance of the
4 V LDO circuit.
The noise performance of the 4 V LDO circuit is only about 1 μV
worse than the same LDO used at 3.3 V because the output noise of
the circuit is almost solely determined by the LDO and not the
external components. The small difference may be attributed to the
internally generated noise in the LDO ground current working with
R2. By keeping R2 small, this noise contribution can be minimized.
The PSRR of the 4 V circuit is as much as 10 dB poorer than the
3.3 V LDO with 500 mV of headroom because the ground current
of the LDO varies slightly with input voltage. This, in turn,
11
10
9
Data Sheet
modulates V OFFSET and reduces the PSRR of the regulator. By
increasing the headroom to 1 V, the PSRR performance is
8
1
10 100
LOAD CURRENT (mA)
1k
nearly restored to the performance of the fixed output LDO.
4.04
Figure 36. 4 V LDO Circuit, Typical RMS Output Noise, 10 Hz to 100 kHz
0
4.03
4.02
–10
–20
200mA
100mA
50mA
10mA
–30
4.01
–40
4.00
3.99
LOAD = 10mA
–50
–60
3.98
3.97
LOAD = 20mA
LOAD = 50mA
LOAD = 100mA
LOAD = 150mA
–70
–80
–90
3.96
LOAD = 200mA
–40 –5
25
85
125
–100
10
100
1k
10k
100k
1M
10M
JUNCTION TEMPERATURE (°C)
Figure 34. 4 V LDO Circuit, Typical Load Regulation over Temperature
FREQUENCY (Hz)
Figure 37. 4 V LDO Circuit, Typical PSRR vs. Load Current, 1 V Headroom
4.040
LOAD = 10mA
0
4.035
4.030
LOAD = 20mA
LOAD = 50mA
LOAD = 100mA
LOAD = 150mA
LOAD = 200mA
–10
–20
–30
200mA
100mA
50mA
10mA
4.025
–40
4.020
4.015
4.010
–50
–60
–70
–80
4.005
–90
4.000
4.4
4.6
4.8
5.0
5.2
5.4
–100
10
100
1k
10k
100k
1M
10M
V IN (V)
Figure 35. 4 V LDO Circuit, Typical Line Regulation over Load Current
FREQUENCY (Hz)
Figure 38. 4 V LDO Circuit, Typical PSRR vs. Load Current, 500 mV Headroom
Rev. E | Page 14 of 24
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