Datasheet > ADP1823-EVAL

ADP1823-EVAL

更新时间： 2024-02-26 06:21:27

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
32页	664K
描述
Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking

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ADP1823-EVAL 数据手册

Dual, Interleaved, Step-Down

DC-to-DC Controller with Tracking

ADP1823

FEATURES

TYPICAL APPLICATION CIRCUIT

IN = 12V

Fixed-frequency operation: 300 kHz, 600 kHz, or

synchronized operation up to 1 MHz

Supply input range: 2.9 V to 20 V

Interleaved operation results in smaller, low cost input

capacitor

180µF

1µF

EN1

EN2

PV IN

TRK1

TRK2

VREG

All-N-channel MOSFET design for low cost

0.8ꢀ5 accuracy at 0°C to 70°C

Soft start, thermal overload, current-limit protection

10 μA shutdown supply current

BST2

DH2

BST1

DH1

0.47µF

IRLR7807Z

2.2µH

IRLR7807Z

2.2µH

ADP1823

1.2V,

1.8V,

Internal linear regulator

SW2

SW1

Lossless R_DSONcurrent-limit sensing

Reverse current protection during soft start for handling

precharged outputs

Independent Power OK outputs

Voltage tracking for sequencing or DDR termination

Available in ꢀ mm × ꢀ mm, 32-lead LFCSP

2kΩ

CSL2

DL2

CSL1

DL1

560µF

2kΩ

IRFR3709Z

PGND2

FB2

PGND1

FB1

390pF

1kΩ

COMP2

390pF

APPLICATIONS

2kΩ

COMP1

GND

3900pF 4.53kΩ

Telecommunications and networking systems

Medical imaging systems

Base station power

FREQ

4.53kΩ 3900pF

LDOSD

SYNC

Set-top boxes

Printers

DDR termination

Figure 1. Typical Application Circuit

GENERAL DESCRIPTION

The ADP1823 is a versatile, dual, interleaved, synchronous

PWM buck controller that generates two independent output

rails from an input of 2.9 V to 20 V. Each controller can be con-

figured to provide output voltages from 0.6 V to 85% of the

input voltage and is sized to handle large MOSFETs for point-

of-load regulators. The two channels operate 180° out of phase,

reducing stress on the input capacitor and allowing smaller, low

cost components. The ADP1823 is ideal for a wide range of

high power applications, such as DSP and processor core I/O

power, and general-purpose power in telecommunications,

medical imaging, PC, gaming, and industrial applications.

frequencies between 300 kHz and 1 MHz. The ADP1823

includes soft start protection to prevent inrush current from the

input supply during startup, reverse current protection during

soft start for precharged outputs, as well as a unique adjustable

lossless current-limit scheme utilizing external MOSFET

sensing.

For applications requiring power supply sequencing, the

ADP1823 also provides tracking inputs that allow the output

voltages to track during startup, shutdown, and faults. This

feature can also be used to implement DDR memory bus

termination.

The ADP1823 operates at a pin-selectable, fixed switching

frequency of either 300 kHz or 600 kHz, minimizing external

component size and cost. For noise-sensitive applications, it can

also be synchronized to an external clock to achieve switching

The ADP1823 is specified over the −40°C to +85°C ambient

temperature range, and is available in a 32-lead LFCSP package.

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ADP1823-EVAL相关器件

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ADP1828LC-EVALZ	ADI	获取价格	Synchronous Buck PWM, Step-Down, DC-to-DC Controller
ADP1828YRQZ-R7	ADI	获取价格	Synchronous Buck PWM, Step-Down, DC-to-DC Controller
ADP1829	ADI	获取价格	Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking
ADP1829ACPZ-R7	ADI	获取价格	Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking
ADP1850	ADI	获取价格	Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller
ADP1850ACPZ-R7	ADI	获取价格	Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller
ADP1851	ADI	获取价格	Wide Range Input, Synchronous, Step-Down DC-to-DC Controller
ADP1851ACPZ-R7	ADI	获取价格	Wide Range Input, Synchronous, Step-Down DC-to-DC Controller

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