Datasheet > ADM7171ACPZ-1.8-R7

ADM7171ACPZ-1.8-R7

更新时间： 2024-11-15 20:06:07

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管输出元件调节器
页数	文件大小	规格书
23页	894K
描述
6.5 V, 1 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

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6.5 V, 1 A, Ultralow Noise, High PSRR,

Fast Transient Response CMOS LDO

ADM7171

Data Sheet

FEATURES

TYPICAL APPLICATION CIRCUIT

Input voltage range: 2.3 V to 6.5 V

Maximum load current: 1 A

Low noise: 5 µV rms independent of output voltage at

100 Hz to 100 kHz

ADM7171

= 5V

= 3.3V

OUT

VIN

VOUT

OUT

4.7µF

VIN

VOUT

4.7µF

SENSE

Fast transient response: 1.5 μs for 1 mA to 500 mA load step

60 dB PSRR at 100 kHz

1nF

OFF

GND

Low dropout voltage: 42 mV at 500 mA load, V_OUT= 3 V

Initial accuracy: −0.5% (minimum), +1% (maximum)

Accuracy over line, load, and temperature: 1.5%

Quiescent current, I_GND= 0.7 mA with no load

Low shutdown current: 0.25 μA at V_IN= 5 V

Stable with small 4.7 µF ceramic output capacitor

Adjustable and fixed output voltage options: 1.2 V to 5.0 V

Adjustable output from 1.2 V to V_IN− V_DO

Precision enable

Figure 1. ADM7171 with Fixed Output Voltage, 3.3 V

The ADM7171 regulator output noise is 5 μV rms independent

of the output voltage. The ADM7171 is available in an 8-lead,

3 mm × 3 mm LFCSP, making it not only a very compact solution,

but also providing excellent thermal performance for applications

requiring up to 1 A of output current in a small, low profile

footprint.

Adjustable soft start

8-lead, 3 mm × 3 mm LFCSP package

Supported by ADIsimPower tool

APPLICATIONS

Regulation to noise sensitive applications: ADC and DAC

circuits, precision amplifiers, PLLs/VCOs, and clocking ICs

Communications and infrastructure

Medical and healthcare

Industrial and instrumentation

GENERAL DESCRIPTION

The ADM7171 is a CMOS, low dropout linear regulator (LDO)

that operates from 2.3 V to 6.5 V and provides up to 1 A of output

current. This high output current LDO is ideal for regulation of

high performance analog and mixed signal circuits operating

from 6 V down to 1.2 V rails. Using an advanced proprietary

architecture, the device provides high power supply rejection and

low noise, and achieves excellent line and load transient response

with just a small 4.7 µF ceramic output capacitor. Load transient

response is typically 1.5 μs for a 1 mA to 500 mA load step.

CH1 200mA Ω

CH2 10mV

M400ns A CH3

T 0.40%

100mV

Figure 2. Transient Response (Trace 2), 1 mA to 500 mA Load Step in 400 ns

(Trace 1)

Table 1. Related Devices

Device

Input Voltage Output Current

Package

ADM7170 2.3 V to 6.5 V

ADM7172 2.3 V to 6.5 V

500 mA

2 A

8-lead LFCSP

The ADM7171 is available in 17 fixed output voltage options.

The following voltages are available from stock: 1.3 V, 1.8 V,

2.5 V, 3.0 V, 3.3 V, 4.2 V, and 5.0 V. Additional voltages that are

available by special order are: 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.7 V,

2.75 V, 2.8 V, 2.85 V, 3.8 V, and 4.6 V. An adjustable version is

also available that allows output voltages that range from 1.2 V

to V_IN− V_DOwith an external feedback divider.

Inrush current can be controlled by adjusting the start-up time

via the soft start pin. The typical start-up time with a 1 nF soft

start capacitor is 1.0 ms.

Rev. D

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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与ADM7171ACPZ-1.8-R7相关器件

型号	品牌	获取价格	描述	数据表
ADM7171ACPZ-2.5-R7	ADI	获取价格	Fast transient response
ADM7171ACPZ-3.0-R7	ADI	获取价格	6.5 V, 1 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7171ACPZ-3.3-R7	ADI	获取价格	6.5 V, 1 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7171ACPZ-4.2-R7	ADI	获取价格	Fast transient response
ADM7171ACPZ-5.0-R7	ADI	获取价格	6.5 V, 1 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7171ACPZ-R2	ADI	获取价格	Fast transient response
ADM7171ACPZ-R7	ADI	获取价格	Fast transient response
ADM7171CP-EVALZ	ADI	获取价格	Fast transient response
ADM7172	ADI	获取价格	Input voltage range
ADM7172ACPZ-1.3-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

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