参数资料
| 型号： | ADP1715ARMZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .5A 8MSOP |
| 产品培训模块： | Power Line Monitoring |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.32V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小值） |
| 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 794 (CN2011-ZH PDF) |
| 配用： | ADP1715-EVALZ-ND - BOARD EVALUATION FOR ADP1715 ADP1715-3.3-EVALZ-ND - BOARD EVAL FOR ADP1715-3.3 ADP1715-1.8-EVALZ-ND - BOARD EVAL FOR ADP1715-1.8 |
| 其它名称： | ADP1715ARMZ-R7DKR |
ADP1715/ADP1716
THEORY OF OPERATION
The ADP1715/ADP1716 are low dropout, CMOS linear
regulators that use an advanced, proprietary architecture to
provide high power supply rejection ratio (PSRR) and excellent
line and load transient response with just a small 2.2 μF ceramic
output capacitor. Both devices operate from a 2.5 V to 5.5 V
connect a small ceramic capacitor from SS to GND. Upon
startup, a 1.2 μA current source charges this capacitor. The
ADP1715 start-up output voltage is limited by the voltage at SS,
providing a smooth ramp up to the nominal output voltage. The
soft-start time is calculated by
input rail and provide up to 500 mA of output current. Supply
current in shutdown mode is typically 100 nA.
T SS = V REF × ( C SS / I SS )
where:
(1)
IN
OUT
T SS is the soft-start period.
V REF is the 0.8 V reference voltage.
C SS is the soft-start capacitance from SS to GND.
I SS is the current sourced from SS (1.2 μA).
CURRENT LIMIT
THERMAL PROTECT
SHUTDOWN
SS/
ADJ/
When the ADP1715 is disabled (using EN), the soft-start capacitor
is discharged to GND through an internal 100 Ω resistor.
EN
REFERENCE
SOFT
START
TRK
EN
GND
Figure 26. Internal Block Diagram
1
Internally, the ADP1715/ADP1716 consist of a reference, an
C OUT = 2.2μF
C SS = 22nF
error amplifier, a feedback voltage divider, and a PMOS pass
transistor. Output current is delivered via the PMOS pass
device, which is controlled by the error amplifier. The error
amplifier compares the reference voltage with the feedback
voltage from the output and amplifies the difference. If the
feedback voltage is lower than the reference voltage, the gate of
the PMOS device is pulled lower, allowing more current to pass
and increasing the output voltage. If the feedback voltage is
higher than the reference voltage, the gate of the PMOS device
is pulled higher, allowing less current to pass and decreasing the
output voltage.
The ADP1715 is available in two versions, one with fixed output
voltage options and one with an adjustable output voltage. The
fixed output voltage options are set internally to one of sixteen
values between 0.75 V and 3.3 V, using an internal feedback
network. The adjustable output voltage can be set to between
0.8 V and 5.0 V by an external voltage divider connected from
OUT to ADJ. The fixed output version of ADP1715 allows for
connection of an external soft-start capacitor, which controls
the output voltage ramp during startup. The ADP1716 features
a track pin and is available with fixed output voltage options. All
devices are controlled by an enable pin (EN).
SOFT-START FUNCTION (ADP1715)
OUT
V IN = 5V
V OUT = 3.3V
2
I LOAD = 500mA
TIME (4ms/DIV)
Figure 27. OUT Ramp-Up with External Soft-Start Capacitor
The ADP1715 adjustable version and the ADP1716 have no
pins for soft start, so the function is switched to an internal soft-
start capacitor. This sets the soft-start ramp-up period to
approximately 24 μs. For the worst-case output voltage of 5 V,
using the suggested 2.2 μF output capacitor, the resulting input
inrush current is approximately 460 mA, which is less than the
maximum 500 mA load current.
EN
1
For applications that require a controlled startup, the ADP1715
provides a programmable soft-start function. Programmable
2
OUT
V IN = 5V
V OUT = 1.6V
C OUT = 2.2μF
I LOAD = 10mA
soft start is useful for reducing inrush current upon startup and
for providing voltage sequencing. To implement soft start,
Rev. 0 | Page 10 of 20
TIME (20μs/DIV)
Figure 28. OUT Ramp-Up with Internal Soft-Start
相关PDF资料 |
PDF描述 |
|---|---|
| ADP1720ARMZ-R7 | IC REG LDO ADJ 50MA 8-MSOP |
| ADP1720TRMZ-EP | IC REG LDO ADJ 50MA 8-MSOP |
| ADP172ACBZ-2.9-R7 | IC REG LDO 2.9V .3A 4WLCSP |
| ADP1740ACPZ-1.1-R7 | IC REG LDO 1.1V 2A 16LFCSP |
| ADP1752ACPZ-1.8-R7 | IC REG LDO 1.8V .8A 16LFCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1715-BL1-EVZ | 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1715 - Boxed Product (Development Kits) |
| ADP1715-EVALZ | 功能描述:BOARD EVALUATION FOR ADP1715 RoHS:是 类别:编程器，开发系统 >> 评估板 - 线性稳压器 (LDO) 系列:- 产品变化通告:1Q2012 Discontinuation 30/Mar/2012 设计资源:NCP590MNDPTAGEVB Gerber Files 标准包装:1 系列:- 每 IC 通道数:2 - 双 输出电压:1.8V，2.8V 电流 - 输出:300mA 输入电压:2.1 ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 已供物品:板 已用 IC / 零件:NCP590MNDP 其它名称:NCP590MNDPTAGEVB-NDNCP590MNDPTAGEVBOS |
| ADP1716 | 制造商:AD 制造商全称:Analog Devices 功能描述:500 mA, Low Dropout, CMOS Linear Regulator |
| ADP1716-2.5-EVALZ | 功能描述:BOARD EVAL FOR ADP1716-2.5 RoHS:是 类别:编程器，开发系统 >> 评估板 - 线性稳压器 (LDO) 系列:- 产品变化通告:1Q2012 Discontinuation 30/Mar/2012 设计资源:NCP590MNDPTAGEVB Gerber Files 标准包装:1 系列:- 每 IC 通道数:2 - 双 输出电压:1.8V，2.8V 电流 - 输出:300mA 输入电压:2.1 ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 已供物品:板 已用 IC / 零件:NCP590MNDP 其它名称:NCP590MNDPTAGEVB-NDNCP590MNDPTAGEVBOS |
| ADP1716ARMZ-0.75R7 | 功能描述:IC REG LDO 0.75V .5A 8MSOP 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:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
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