DataSheetWiki


ADP1853 fiches techniques PDF

Analog Devices - Step-Down DC-to-DC Controller

Numéro de référence ADP1853
Description Step-Down DC-to-DC Controller
Fabricant Analog Devices 
Logo Analog Devices 





1 Page

No Preview Available !





ADP1853 fiche technique
Data Sheet
Synchronous, Step-Down DC-to-DC Controller with
Voltage Tracking and Synchronization
ADP1853
FEATURES
Input voltage range: 2.75 V to 20 V
Output voltage range: 0.6 V to 90% VIN
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
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
APPLICATIONS
Intermediate bus and POL systems requiring sequencing and
tracking, including
Telecom base station and networking
Industrial and Instrumentation
Medical and healthcare
GENERAL DESCRIPTION
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.
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
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.
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 VIN feedforward 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.
Protection features include undervoltage lock out, overvoltage,
overcurrent/short circuit, and overtemperature.
VMA
HI
LO
RRAMP
RAMP
VIN
EN
TRK
VCCO
DH
BST
SW
CS
ILIM
ADP1853
DL
SYNC
FREQ
PGND
FB
SS COMP
VIN
M1
L
M2
RCSG
VOUT
AGND
PGOOD
CLKOUT
Figure 1. Typical Operation Circuit
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

PagesPages 29
Télécharger [ ADP1853 ]


Fiche technique recommandé

No Description détaillée Fabricant
ADP1850 DC-to-DC Synchronous Buck Controller Analog Devices
Analog Devices
ADP1850 DC-to-DC Synchronous Buck Controller Analog Integrations Corporation
Analog Integrations Corporation
ADP1851 Step-Down DC-to-DC Controller Analog Devices
Analog Devices
ADP1853 Step-Down DC-to-DC Controller Analog Devices
Analog Devices

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche