Datasheet > ADP1853

ADP1853

更新时间： 2024-09-21 07:18:47

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
28页	829K
描述
Synchronous, Step-Down DC-to-DC Controller

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ADP1853 数据手册

Synchronous, Step-Down DC-to-DC Controller with

Voltage Tracking and Synchronization

Data Sheet

ADP1853

current, improve EMI, and reduce the size of the input bulk

capacitance. The ADP1853 can also be configured as a slave

device for current sharing. Additionally, the ADP1853 includes

accurate tracking, precision enable, and power good functions

for sequencing. The ADP1853 provides a high speed, high peak

current gate driving capability to enable energy efficient power

conversion. The device can be configured to operate in power

saving mode by skipping pulses, reducing switching losses and

improving efficiency at light load and standby conditions.

FEATURES

Input voltage range: 2.75 V to 20 V

Output voltage range: 0.6 V to 90% V_IN

Maximum output current of more than 25 A

Current mode architecture with current sense input

Configurable to voltage mode

1% output voltage accuracy over temperature

Voltage tracking input

Programmable frequency: 200 kHz to 1.5 MHz

Synchronization input

Internal clock output

Power saving mode at light load

Precision enable input

Power good with internal pull-up resistor

Adjustable soft start

The accurate current limit allows design within a narrower

range of tolerances and can reduce overall converter size and

cost. The ADP1853 can regulate down to 0.6 V output using a

high accuracy reference with 1% tolerance over the

temperature range from −40°C to 125°C.

With a wide range input voltage, the ADP1853 is designed to

provide the designer with maximum flexibility for use in a

variety of system configurations; loop compensation, soft start,

frequency setting, power saving mode, current limit, and

current sense gain can all be programmed using external

components. In addition, the external RAMP resistor allows

choosing optimal slope and V_INfeedforward in both current

and voltage mode for excellent line rejection. The linear

regulator and the boot strap diode for the high-side driver are

internal.

Programmable current sense gain

Integrated bootstrap diode

Starts into a precharged load

Externally adjustable slope compensation

Suitable for any output capacitor

Overvoltage and overcurrent-limit protection

Thermal overload protection

Input undervoltage lockout (UVLO)

Available in 20-lead, 4 mm × 4 mm LFCSP

Supported by ADIsimPower™ design tool

Protection features include undervoltage lock out, overvoltage,

overcurrent/short circuit, and overtemperature.

APPLICATIONS

Intermediate bus and POL systems requiring sequencing and

tracking, including

VIN

RAMP

Telecom base station and networking

Industrial and Instrumentation

Medical and healthcare

RAMP

VIN

BST

VOUT

TRK

GENERAL DESCRIPTION

VCCO

The ADP1853 is a wide range input, dc-to-dc, synchronous

buck controller capable of running from commonly used 3.3 V

to 12 V (up to 20 V) voltage inputs. The device nominally

operates in current mode with valley current sensing providing

the fastest step response for digital loads. It can also be

configured as a voltage mode controller with low noise and

crosstalk for sensitive loads.

ILIM

ADP1853

CSG

SYNC

PGND

FREQ

COMP

PGOOD

AGND

CLKOUT

The ADP1853 can be used as a master synchronization clock

for the power system and for convenient synchronization

between controllers. The CLKOUT signal can synchronize

other devices in the ADP185x family such that slave devices

are phase-shifted from the master to reduce the input ripple

Figure 1. Typical Operation 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

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.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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ADP1853ACPZ-R7	ADI	获取价格	Synchronous, Step-Down DC-to-DC Controller
ADP1864	ADI	获取价格	Constant Frequency Current-Mode Step-Down DC/DC Controller in TSOT
ADP1864AUJZ-R7	ADI	获取价格	Constant Frequency Current-Mode Step-Down DC/DC Controller in TSOT
ADP1864-EVAL	ADI	获取价格	Constant Frequency Current-Mode Step-Down DC/DC Controller in TSOT
ADP1870	ADI	获取价格	Synchronous Buck Controller with Constant On-Time and Valley Current Mode
ADP1870-0.3-EVALZ	ADI	获取价格	Synchronous Buck Controller with Constant On-Time and Valley Current Mode
ADP1870-0.6-EVALZ	ADI	获取价格	Synchronous Buck Controller with Constant On-Time and Valley Current Mode
ADP1870-1.0-EVALZ	ADI	获取价格	Synchronous Buck Controller with Constant On-Time and Valley Current Mode
ADP1870ACPZ-0.3-R7	ADI	获取价格	Synchronous Buck Controller with Constant On-Time and Valley Current Mode
ADP1870ACPZ-0.6-R7	ADI	获取价格	Synchronous Buck Controller with Constant On-Time and Valley Current Mode

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