Datasheet > ADM7172

ADM7172

更新时间： 2024-01-22 09:51:43

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	1041K
描述
Input voltage range

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数据手册

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ADM7172 数据手册

6.5 V, 2 A, Ultralow Noise, High PSRR, Fast

Transient Response CMOS LDO

ADM7172

Data Sheet

FEATURES

TYPICAL APPLICATION CIRCUIT

Input voltage range: 2.3 V to 6.5 V

Maximum load current: 2 A

Low noise: 5 μV rms independent of output voltage at

100 Hz to 100 kHz

ADM7172

= 5V

= 3.3V

OUT

VIN

VOUT

OUT

4.7µF

VIN

VOUT

4.7µF

SENSE

Fast transient response: 1.5 ꢀs for 1 mA to 1.5 A load step

60 dB PSRR at 100 kHz

1nF

OFF

GND

Low dropout voltage: 172 mV at 2 A 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 ꢀA 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. ADM7172 with Fixed Output Voltage, 3.3 V

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.

The ADM7172 regulator output noise is 5 ꢀV rms, independent

of the output voltage. The ADM7172 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 2 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 ADM7172 is a CMOS, low dropout linear regulator (LDO)

that operates from 2.3 V to 6.5 V and provides up to 2 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 ꢀs for a 1 mA to 1.5 A load step.

CH1 1.0A Ω

CH2 20mV

M400ns A CH3

T 0.0%

100mV

Figure 2. Transient Response (Trace 2), 1 mA to 1.5 A Load Step in 400 ns (Trace 1)

Table 1. Related Devices

Device

Input Voltage

Output Current

500 mA

1 A

Package

The ADM7172 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.

ADM7170 2.3 V to 6.5 V

ADM7171 2.3 V to 6.5 V

8-lead LFCSP

Rev. C

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 registeredtrademarks arethe 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ADM7172相关器件

型号	品牌	获取价格	描述	数据表
ADM7172ACPZ-1.3-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172ACPZ-1.8-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172ACPZ-2.5-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172ACPZ-3.0-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172ACPZ-3.3-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172ACPZ-4.2-R7	ADI	获取价格	Input voltage range
ADM7172ACPZ-5.0-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172ACPZ-R2	ADI	获取价格	Input voltage range
ADM7172ACPZ-R7	ADI	获取价格	6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO
ADM7172CP-EVALZ	ADI	获取价格	Input voltage range

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