Datasheet > ADP2126

ADP2126

更新时间： 2024-11-25 08:19:35

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
20页	832K
描述
Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters

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ADP2126 数据手册

Ultralow Profile, 500 mA, 6 MHz, Synchronous,

Step-Down, DC-to-DC Converters

ADP2126/ADP2127

TYPICAL APPLICATION CIRCUITS

FEATURES

1.20 V and 1.26 V fixed output voltage options

Clock signal enable

Logic signal enable also available on certain models

6 MHz operating frequency

Spread spectrum frequency modulation to reduce EMI

500 mA continuous output current

Input voltage: 2.1 V to 5.5 V

ADP2126

1.0µH

INPUT

VOLTAGE

OUTPUT

VOLTAGE

VIN

2.1V TO 5.5V

1.20V OR 1.26V

2.2µF

OUT

2.2µF

GND

EXTCLK MODE

PWM

0.3 μA (typical) shutdown supply current

Pin-selectable power-saving mode

Compatible with tiny multilayer inductors

Internal synchronous rectifier

AUTO

OFF ON

OFF

Internal compensation

Internal soft start

Output-to-ground short-circuit protection

Current-limit protection

Undervoltage lockout

Thermal shutdown protection

0.330 mm height (maximum), 6-ball BUMPED_CHIP (ADP2126)

0.200 mm height (maximum), 6-pad EWLP (ADP2127)

*LOGIC HIGH ENABLE IS ONLY AVAILABLE ON CERTAIN MODELS.

Figure 1. ADP2126 0.33 mm Maximum Height Solution

ADP2127

0.56µH

INPUT

VOLTAGE

OUTPUT

VOLTAGE

VIN

2.1V TO 5.5V

1.20V OR 1.26V

2 × 1µF

OUT

2 × 1µF

GND

EXTCLK MODE

APPLICATIONS

Mobile phones

Digital still/video cameras

Digital audio

Portable equipment

Camera modules

Image stabilization systems

PWM

AUTO

OFF ON

OFF

*LOGIC HIGH ENABLE IS ONLY AVAILABLE ON CERTAIN MODELS.

Figure 2. ADP2127 0.22 mm Maximum Height Solution

GENERAL DESCRIPTION

The ADP2126/ADP2127 are high frequency, step-down, dc-to-

dc converters optimized for portable applications in which board

area and battery life are critical constraints. The fixed 6 MHz

operating frequency enables the use of tiny ceramic inductors

and capacitors and the regulators use spread spectrum frequency

modulation to reduce EMI. Additionally, synchronous rectification

improves efficiency and results in fewer external components.

The ADP2126/ADP2127 are enabled by a 6 MHz to 27 MHz

external clock signal applied to the EXTCLK pin. Certain models

can also be enabled with a logic high signal. When the external clock

is not switching and in a low logic state, the ADP2126/ADP2127

stop regulating and shut down to draw less than 0.3 μA (typical)

from the source.

The ADP2126/ADP2127 have an input voltage range of 2.1 V to

5.5 V, allowing the use of single Li+/Li polymer cell, three-cell

alkaline, NiMH cell, and other standard power sources. The

ADP2126/ADP2127 are internally compensated to minimize

external components and can source up to 500 mA. Other key

features, such as cycle-by-cycle peak current limit, soft start,

undervoltage lockout (UVLO), output-to-ground short-circuit

protection, and thermal shutdown provide protection for internal

and external circuit components.

At high load currents, the ADP2126/ADP2127 use a voltage

regulating pulse-width modulation (PWM) mode that maintains

a constant frequency with excellent stability and transient response.

Light load operation is determined by the state of the MODE pin.

In forced PWM mode, the converter continues operating in PWM

for light loads. Under light load conditions in auto mode, the

ADP2126/ADP2127 automatically enter a power-saving mode,

which uses pulse frequency modulation (PFM) to reduce the

effective switching frequency, thus ensuring the longest battery

life in portable applications.

Rev. A

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ADP2126相关器件

型号	品牌	获取价格	描述	数据表
ADP2126-1.2-EVALZ	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2126ACDZ-1.20R7	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127-1.26-EVALZ	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127ACNZ-1.20R7	ADI	获取价格	暂无描述
ADP2127ACNZ1.260R7	ADI	获取价格	Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters
ADP2127ACNZ1.260R7	ROCHESTER	获取价格	1.291 A SWITCHING REGULATOR, 6800 kHz SWITCHING FREQ-MAX, UUC6, 0.200 MM HEIGHT, ROHS COMP
ADP2138	ADI	获取价格	Compact, 800 mA, 3 MHz, Step-Down DC-to-DC Converter
ADP2138ACBZ-0.8-R7	ADI	获取价格	Compact, 800 mA, 3 MHz, Step-Down DC-to-DC Converter
ADP2138ACBZ-1.0-R7	ADI	获取价格	Compact, 800 mA, 3 MHz, Step-Down DC-to-DC Converter

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