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参数资料
| 型号： | ADP322ACPZ-135-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/24页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3/2.5/1.8V 16LFCSP |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V，2.5V，1.8V |
| 输入电压： | 1.8 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.11V @ 200mA，0.11V @ 200mA，- |
| 稳压器数量： | 3 |
| 电流 - 输出： | 200mA（最小值） |
| 电流 - 限制（最小）： | 250mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-WQ（3x3） |
| 包装： | 标准包装 |
| 其它名称： | ADP322ACPZ-135-R7DKR |
Data Sheet
Use Equation 1 to determine the worst-case capacitance,
accounting for capacitor variation over temperature, compo-
nent tolerance, and voltage.
ADP322/ADP323
As shown in Figure 48, the ENx pin has built-in hysteresis. This
prevents on/off oscillations that can occur due to noise on the
ENx pin as it passes through the threshold points.
C EFF = C BIAS × (1 ? TEMPCO ) × (1 ? TOL )
where:
C BIAS is the effective capacitance at the operating voltage.
TEMPCO is the worst-case capacitor temperature coefficient.
TOL is the worst-case component tolerance.
In this example, TEMPCO over ?40°C to +85°C is assumed
to be 15% for an X5R dielectric. TOL is assumed to be 10%,
and C BIAS is 0.94 μF at 1.8 V (from the graph in Figure 47).
Substituting these values into Equation 1 yields
(1)
The active/inactive thresholds of the ENx pin are derived
from the V BIAS voltage. Therefore, these thresholds vary with
changing input voltage. Figure 49 shows typical ENx active/
inactive thresholds when the input voltage varies from 2.5 V
to 5.5 V (note that V ENx is the enable voltage).
1.00
0.95
0.90
0.85
C EFF = 0.94 μF × (1 ? 0.15) × (1 ? 0.1) = 0.719 μF
Therefore, the capacitor chosen in this example meets the mini-
mum capacitance requirement of the LDO over temperature
and tolerance at the chosen output voltage.
To guarantee the performance of the ADP322/ADP323 triple
LDO, it is imperative that the effects of dc bias, temperature,
0.80
0.75
0.70
0.65
0.60
0.55
V ENx RISE
V ENx FALL
and tolerances on the behavior of the capacitors be evaluated
0.50
2.5
3.0
3.5
4.0
4.5
5.0
5.5
for each application.
UNDERVOLTAGE LOCKOUT
The ADP322/ADP323 have an internal undervoltage lockout
circuit that disables all inputs and the output when the input
voltage bias, VBIAS, is less than approximately 2.2 V. This
ensures that the inputs of the ADP322/ADP323 and the output
behave in a predictable manner during power-up.
ENABLE FEATURE
The ADP322/ADP323 use the ENx pins to enable and disable
INPUT VOLTAGE (V)
Figure 49. Typical ENx Pins Thresholds vs. Input Voltage
The ADP322/ADP323 use an internal soft start to limit the
inrush current when the output is enabled. The start-up time
for the 2.8 V option is approximately 220 μs from the time the
ENx active threshold is crossed to when the output reaches 90%
of its final value. The start-up time is somewhat dependent on
the output voltage setting and increases slightly as the output
voltage increases.
shows that, when a rising voltage on ENx crosses the active
threshold, VOUTx turns on. When a falling voltage on ENx
V ENx
V OUT1
crosses the inactive threshold, VOUTx turns off.
1.4
1
V OUT2
1.2
V OUT @ 4.5V IN
V OUT3
1.0
0.8
2
0.6
W
W
W
W
0.4
CH1 1V
CH3 500mV
B
B
CH2 500mV
CH4 500mV
B
B
M100μs A CH1
T 10.2%
540mV
0.2
Figure 50. Typical Start-Up Time,I LOAD1 = I LOAD2 = I LOAD3 = 100 mA,
CH1 = V ENx (the Enable Voltage), CH2 = V OUT1 , CH3 = V OUT2 , CH4 = V OUT3
0
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
ENABLE VOLTAGE (V)
Figure 48. Typical ENx Pin Operation
Rev. A | Page 17 of 24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP322ACPZ-145 | 制造商:Analog Devices 功能描述:IC LDO TRIPLE 0.2A 16LFCSP 制造商:Analog Devices 功能描述:IC, LDO, TRIPLE, 0.2A, 16LFCSP 制造商:Analog Devices 功能描述:IC, LDO, TRIPLE, 0.2A, 16LFCSP; Primary Input Voltage:3.8V; Output Voltage Fixed:3.3V; Dropout Voltage Vdo:110mV; Voltage Regulator Case Style:LFCSP; No. of Pins:16; Output Current:200mA; Operating Temperature Min:-40C; Operating ;RoHS Compliant: Yes |
| ADP322ACPZ-145-R7 | 功能描述:IC REG LDO 3.3/2.5/1.2V 16LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:45 系列:- 稳压器拓扑结构:正，固定式 输出电压:5V 输入电压:6 V ~ 30 V 电压 - 压降（标准）:0.47V @ 250mA 稳压器数量:1 电流 - 输出:250mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:TO-220-3 供应商设备封装:TO-220-3 包装:管件 产品目录页面:1289 (CN2011-ZH PDF) 其它名称:*LP2954AIT*LP2954AIT/NOPBLP2954AIT |
| ADP322ACPZ-155 | 制造商:Analog Devices 功能描述:IC LDO TRIPLE 0.2A 16LFCSP 制造商:Analog Devices 功能描述:IC, LDO, TRIPLE, 0.2A, 16LFCSP |
| ADP322ACPZ-155-R7 | 功能描述:IC REG LDO 3.3/1.8/1.5V 16LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:75 系列:- 稳压器拓扑结构:正，可调式 输出电压:1.2 V ~ 37 V 输入电压:4.2 V ~ 40 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:500mA 电流 - 限制（最小）:500mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-252-3，DPak（2 引线+接片），SC-63 供应商设备封装:TO-252-3 包装:管件 产品目录页面:1286 (CN2011-ZH PDF) 其它名称:*LM317AMDT/NOPBLM317AMDT |
| ADP322ACPZ-165-R7 | 功能描述:IC REG LDO 3.3/1.8/1.2V 16LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:45 系列:- 稳压器拓扑结构:正，固定式 输出电压:5V 输入电压:6 V ~ 30 V 电压 - 压降（标准）:0.47V @ 250mA 稳压器数量:1 电流 - 输出:250mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:TO-220-3 供应商设备封装:TO-220-3 包装:管件 产品目录页面:1289 (CN2011-ZH PDF) 其它名称:*LP2954AIT*LP2954AIT/NOPBLP2954AIT |
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