Datasheet > ADM7170ACPZ-2.5-R7

ADM7170ACPZ-2.5-R7

更新时间： 2024-11-16 00:57:39

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
24页	1026K
描述
Adjustable and fixed output voltage options

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6.5 V, 500 mA, Ultralow Noise, High PSRR,

Fast Transient Response CMOS LDO

ADM7170

Data Sheet

FEATURES

TYPICAL APPLICATION CIRCUIT

Input voltage range: 2.3 V to 6.5 V

Maximum load current: 500 mA

Low noise: 5 µV rms independent of output voltage at

100 Hz to 100 kHz

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

60 dB PSRR at 100 kHz

ADM7170

= 5V

= 3.3V

OUT

VIN

VOUT

OUT

4.7µF

VIN

VOUT

4.7µF

SENSE

OFF

1nF

GND

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

Initial accuracy: 0.75%

Figure 1. ADM7170 with Fixed Output Voltage, 3.3 V

Accuracy over line, load, and temperature: 1.25%

Quiescent current, I_GND= 0.7 mA at 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

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 about 1.0 ms.

Adjustable soft start

8-lead, 3 mm × 3 mm LFCSP package

Supported by ADIsimPower tool

The ADM7170 regulator output noise is 5 μV rms independent

of the output voltage. The ADM7170 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 500 mA of output current in a

small, low profile footprint.

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 ADM7170 is a CMOS, low dropout linear regulator (LDO)

that operates from 2.3 V to 6.5 V and provides up to 500 mA of

output current. This high output current LDO is ideal for regula-

tion 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 0.4%

100mV

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

(Trace 1)

The ADM7170 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.

Table 1. Related Devices

Device

Input Voltage Output Current

Package

ADM7171 2.3 V to 6.5 V

ADM7172 2.3 V to 6.5 V

1 A

2 A

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

rightsof third parties that may result fromits 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 andregisteredtrademarks 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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