Datasheet > ADP2118

ADP2118

更新时间： 2024-11-25 06:36:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
24页	1228K
描述
3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter

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ADP2118 数据手册

3 A, 1.2 MHz/600 kHz High Efficiency

Synchronous Step-Down DC-to-DC Converter

ADP2118

FEATURES

GENERAL DESCRIPTION

3 A continuous output current

75 mΩ and 40 mΩ integrated FET

1.5ꢀ output accuracy

Input voltage range from 2.3 V to 5.5 V

Output voltage from 0.6 V to V_IN

600 kHz or 1.2 MHz fixed switching frequency

Synchronizable between 600 kHz and 1.4 MHz

Selectable synchronize phase shift: 0^oor 180^o

Selectable PWM or PFM mode operation

Current mode architecture

Precision enable input

Power good output

Voltage tracking input

Integrated soft start

Internal compensation

Starts up into a precharged output

UVLO, OVP, OCP, and thermal shutdown

The ADP2118 is a low quiescent current, synchronous, step-down,

dc-to-dc converter in a compact 4mm × 4mm LFCSP_WQ

package. It uses a current mode, constant frequency pulse-width

modulation (PWM) control scheme for excellent stability and

transient response. Under light loads, the ADP2118 can be

configured to operate in pulse frequency modulation (PFM)

mode that reduces switching frequency to save power.

The ADP2118 runs from input voltages of 2.3 V to 5.5 V. The

output voltage of the ADP2118ACPZ-R7 is adjustable from

0.6 V to input voltage (V_IN), and the ADP2118ACPZ-x.x-R7 are

available in preset output voltage options of 3.3 V, 2.5 V, 1.8 V,

1.5 V, 1.2 V, and 1.0 V. The ADP2118 requires minimal external

parts and provides a high efficiency solution with its integrated

power switch, synchronous rectifier, and internal compensation.

The IC draws less than 3 μA from the input source when it is

disabled. Other key features include undervoltage lockout

(UVLO), integrated soft start to limit inrush current at startup,

Available in 16-lead 4mm × 4mm LFCSP_WQ package

overvoltage protection (OVP), overcurrent protection (OCP),

and thermal shutdown (TSD).

APPLICATIONS

DSP/FPGA/ASIC core power

Telecommunication/networking equipment

PDAs and palmtop computers

Audio/video consumer electronics

0.1µF

10Ω

100

10kΩ

100µF

X5R,

6.3V

PFM OPERATION

1µH

SYNC/MODE

FREQ

PVIN

3.3V

OUT

ADP2118

100µF

X5R,

6.3V

TRK

FPWM OPERATION

= 5V

f_S^O=^UT1.2MHz

= 3.3V

BOT

TOP

2.21kΩ 10kΩ

0.01

0.1

OUTPUT CURRENT (A)

Figure 2. Efficiency vs. Output Current

Figure 1. Typical Applications Circuit

Rev. 0

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.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与ADP2118相关器件

型号	品牌	获取价格	描述	数据表
ADP2118ACPZ-1.0-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2118ACPZ-1.2-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2118ACPZ-1.5-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2118ACPZ-1.8-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2118ACPZ-2.5-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2118ACPZ-3.3-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2118ACPZ-R2	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Regulator
ADP2118ACPZ-R7	ADI	获取价格	3 A, 1.2 MHz/600 kHz High Efficiency Synchronous Step-Down DC-to-DC Converter
ADP2119	ADI	获取价格	2 A/1.25 A, 1.2 MHz, Synchronous, Step-Down DC-to-DC Regulators
ADP2119ACPZ-1.0-R7	ADI	获取价格	2 A/1.25 A, 1.2 MHz, Synchronous, Step-Down DC-to-DC Regulators

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