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| 型号： | ADP1708-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADP1708 |
| 标准包装： | 1 |
| 每 IC 通道数： | 1 - 单 |
| 输出电压： | 1.6V |
| 电流 - 输出： | 1A |
| 输入电压： | 2.5 ~ 5.5V |
| 稳压器类型： | 正，可调式 |
| 工作温度： | -40°C ~ 125°C |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADP1708 |
| 产品目录页面： | 793 (CN2011-ZH PDF) |
| 相关产品： | ADP1708ARDZ-R7DKR-ND - IC REG LDO ADJ 1A 8SOIC ADP1708ARDZ-R7CT-ND - IC REG LDO ADJ 1A 8SOIC ADP1708ARDZ-R7TR-ND - IC REG LDO ADJ 1A 8SOIC ADP1708ACPZ-R7TR-ND - IC REG LDO ADJ 1A 8-LFCSP |
ADP1706/ADP1707/ADP1708
ADJUSTABLE OUTPUT VOLTAGE (ADP1708)
The ADP1708 can have its output voltage set over a 0.8 V to
5.0 V range. The output voltage is set by connecting a resistive
voltage divider from OUT to ADJ. The output voltage is
calculated by
ENABLE FEATURE
The ADP1706/ADP1707/ADP1708 use the EN pin to enable
and disable the OUT pin under normal operating conditions.
As shown in Figure 31, when a rising voltage on EN crosses the
active threshold, OUT turns on. When a falling voltage on EN
V OUT = 0.8 V (1 + R1 / R2 )
where:
R1 is the resistor from OUT to ADJ.
R2 is the resistor from ADJ to GND.
The maximum bias current into ADJ is 100 nA, so for less
than 0.5% error due to the bias current, use values less than
60 kΩ for R2.
TRACK MODE (ADP1707)
(2)
crosses the inactive threshold, OUT turns off.
EN
The ADP1707 includes a tracking mode feature. As shown in
nominal output voltage, OUT is equal to the voltage at TRK.
Otherwise, OUT regulates to its nominal output value.
4.0
3.5
3.0
2.5
2.0
1.5
1.0
OUT
V IN = 5V
V OUT = 1.6V
C OUT = 4.7 μ F
I LOAD = 10mA
TIME (10ms/DIV)
Figure 31. ADP1706 Typical EN Pin Operation
As shown in Figure 31, the EN pin has hysteresis built in. This
prevents on/off oscillations that can occur due to noise on the
EN pin as it passes through the threshold points.
The EN pin active/inactive thresholds are derived from the IN
voltage. Therefore, these thresholds vary when changing the
input voltage. Figure 32 shows typical EN active/inactive
thresholds when the input voltage varies from 2.5 V to 5.5 V.
0.5
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V IN = 3.8V
V OUT = 3.3V
I LOAD = 10mA
4.0 4.5
5.0
1.4
1.3
1.2
V TRK (V)
Figure 30. ADP1707 Output Voltage vs. Tracking Voltage
For example, consider an ADP1707 with a nominal output
voltage of 3.3 V. If the voltage applied to its TRK pin is greater
than 3.3 V, OUT maintains a nominal output voltage of 3.3 V.
If the voltage applied to TRK is reduced below 3.3 V, OUT
1.1
1.0
0.9
0.8
0.7
EN ACTIVE
EN INACTIVE
HYSTERESIS
tracks this voltage. OUT can track the TRK pin voltage from
the nominal value all the way down to 0 V. A voltage divider is
present from TRK to the error amplifier input with a divider
ratio equal to the divider from OUT to the error amplifier,
which sets the output voltage equal to the tracking voltage.
Both divider ratios are set by postpackage trim, depending on
the desired output voltage.
Rev. 0 | Page 11 of 20
0.6
0.5
2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50
V IN (V)
Figure 32. Typical EN Pin Thresholds vs. Input Voltage
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1708-EVALZ | 制造商:Analog Devices 功能描述:ADP1708, LDO, CMOS, EVALUATION BOARD |
| ADP170AUJZ-1.25-R7 | 功能描述:Linear Voltage Regulator IC Positive Fixed 1 Output 1.25V 300mA TSOT-5 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:有效 稳压器拓扑:正，固定式 电压 - 输出:1.25V 电流 - 输出:300mA 电压 - 跌落（典型值）:- 稳压器数:1 电压 - 输入:1.6 V ~ 3.6 V 电流 - 限制（最小值）:400mA 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 供应商器件封装:TSOT-5 标准包装:3,000 |
| ADP170AUJZ-1.2-R7 | 功能描述:IC REG LDO 1.2V .3A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.12V @ 150mA 稳压器数量:1 电流 - 输出:150mA（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:带卷 (TR) 其它名称:ADP160AUJZ-3.0-R7TR |
| ADP170AUJZ-1.5-R7 | 功能描述:IC REG LDO 1.5V .3A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.12V @ 150mA 稳压器数量:1 电流 - 输出:150mA（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:带卷 (TR) 其它名称:ADP160AUJZ-3.0-R7TR |
| ADP170AUJZ-1.8-R7 | 功能描述:IC REG LDO 1.8V .3A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
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