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参数资料
| 型号： | ADP1752ACPZ-2.5-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V .8A 16LFCSP |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 最高 3.6V |
| 电压 - 压降（标准）： | 0.07V @ 800mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 800mA（最小值） |
| 电流 - 限制（最小）： | 1A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-VQ EP（4x4） |
| 包装： | 标准包装 |
| 其它名称： | ADP1752ACPZ-2.5-R7DKR |
Data Sheet
THEORY OF OPERATION
The ADP1752 / ADP1753 are low dropout linear regulators that
use an advanced, proprietary architecture to provide high power
supply rejection ratio (PSRR) and excellent line and load transient
response with only a small 4.7 μF ceramic output capacitor.
Both devices operate from a 1.6 V to 3.6 V input rail and
provide up to 0.8 A of output current. Supply current in
shutdown mode is typically 2 μA.
ADP1752/ADP1753
The ADP1752 is available in seven fixed output voltage options
between 0.75 V and 2.5 V. The ADP1752 allows for connection
of an external soft start capacitor that controls the output voltage
ramp during startup. The ADP1753 is the adjustable version
with an output voltage that can be set to a value between 0.75 V
and 3.3 V by an external voltage divider. Both devices are con-
trolled by an enable pin (EN).
VIN
ADP1752
UVLO
REVERSE POLARITY
PROTECTION
VOUT
ADP1753 provide a programmable soft start function. The
programmable soft start is useful for reducing inrush current
upon startup and for providing voltage sequencing. To implement
GND
PG
SHORT-CIRCUIT
AND THERMAL
PROTECTION
PG
DETECT
0.5V
REF
R1
R2
SENSE
soft start, connect a small ceramic capacitor from SS to GND.
Upon startup, a 0.9 μA current source charges this capacitor.
The ADP1752 / ADP1753 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 as follows:
t SS = V REF × ( C SS / I SS )
(1)
EN
SHUTDOWN
0.9μA
SS
where:
t SS is the soft start period.
Figure 24. ADP1752 Internal Block Diagram
V REF is the 0.5 V reference voltage.
C SS is the soft start capacitance from SS to GND.
I SS is the current sourced from SS (0.9 μA).
VIN
ADP1753
UVLO
REVERSE POLARITY
PROTECTION
VOUT
When the ADP1752 / ADP1753 are disabled (using EN), the soft
start capacitor is discharged to GND through an internal 100 ?
resistor.
2.50
GND
SHORT-CIRCUIT
AND THERMAL
2.25
2.00
EN
PROTECTION
1.75
1nF
PG
PG
0.5V
REF
ADJ
1.50
1.25
4.7nF
DETECT
0.9μA
1.00
10nF
EN
SHUTDOWN
SS
0.75
0.50
Figure 25. ADP1753 Internal Block Diagram
0.25
Internally, the ADP1752 / ADP1753 consist of a reference, an error
0
0
2
4
6
8
10
amplifier, a feedback voltage divider, and a PMOS pass transistor.
Output current is delivered via the PMOS pass transistor, 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.
Rev. F | Page 11 of 20
TIME (ms)
Figure 26. V OUT Ramp-Up with External Soft Start Capacitor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1752-BL1-EVZ | 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1752 - Boxed Product (Development Kits) |
| ADP1753ACPZ-R7 | 功能描述:IC REG LDO ADJ .8A 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 |
| ADP1753-BL1-EVZ | 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1753 - Boxed Product (Development Kits) |
| ADP1753-EVALZ | 制造商:AD 制造商全称:Analog Devices 功能描述:0.8 A, Low VIN, Low Dropout Linear Regulator |
| ADP1754 | 制造商:AD 制造商全称:Analog Devices 功能描述:1.2 A, Low VIN, Low Dropout Linear Regulator |
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