DataSheetWiki

ADP2311 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Analog Devices - Synchronous Step-Down Regulator

شماره قطعه ADP2311
شرح مفصل Synchronous Step-Down Regulator
تولید کننده Analog Devices 
آرم Analog Devices 


1 Page

		

No Preview Available !

ADP2311 شرح
Data Sheet
Dual 1 A, 18 V, Synchronous Step-Down
Regulator with Fail-Safe Voltage Monitoring
ADP2311
FEATURES
Input voltage: 4.5 V to 18 V
±1.0% output accuracy
Integrated MOSFET: 110 mΩ/60 mΩ typical
Continuous output current: 1 A/1 A
Power fail comparator generates warning
Power-on reset with programmable delay timer
Adjustable voltage monitor for power-down (Channel 2)
Watchdog refresh input
Dual phase with 180° out-of-phase operation
Fixed switching frequency: 300 kHz
Internal compensation and soft start
Stable with low ESR output ceramic capacitors
Precision enable input
Power feedback during power-off
UVLO, OCP, OVP, and thermal shutdown protection
APPLICATIONS
Industrial and instrumentation
Healthcare and medical
DC-to-DC point of load applications
GENERAL DESCRIPTION
The ADP2311 is a fully integrated, dual output, synchronous
step-down dc-to-dc regulator. The regulator operates from input
voltages of 4.5 V to 18 V, and the output can regulate down to
0.6 V. Each channel can provide up to 1 A of continuous output
current.
The ADP2311 integrates the high-side and low-side MOSFETs
to provide a very high efficiency, compact solution. Both channels
of the regulator run at 180° out of phase to reduce the input ripple
current and the input capacitor size, thereby helping to lower
system electromagnetic interference (EMI). The ADP2311 also
integrates internal compensation and soft start circuitry to simplify
the design.
TYPICAL APPLICATION CIRCUIT
VIN
CIN1
RPFI_TOP
RPFI_BOT
VOUT1
COUT1
C1BST
L1
RTOP1
RBOT1
PFO POR WDI RSTO
EN
PVIN1
PVIN2
PFI VM2
RVM2_TOP
RVM2_BOT
VIN
CIN2
BST1 ADP2311 BST2
SW1
PGND1
FB1
GND VREG
SW2
PGND2
FB2
TIMER
C2BST
L2
RTOP2
RBOT2
CVREG
CTIMER
VOUT2
COUT2
Figure 1.
100
VOUT = 3.3V
95 VOUT = 5V
90
85
80
75
70
65
60
55
50
0 0.2 0.4 0.6 0.8 1.0
OUTPUT CURRENT (A)
Figure 2. Efficiency vs. Output Current at VIN = 12 V, fSW = 300 kHz
An on-chip watchdog timer can reset the microprocessor if it
fails to strobe within a preset timeout period. Accurate voltage
monitoring circuitry and a power fail comparator provide a
controlled power-up and power-down sequence to enhance
system reliability.
The ADP2311 also includes undervoltage lockout (UVLO),
overvoltage protection (OVP), overcurrent protection (OCP),
and thermal shutdown (TSD).
The ADP2311 operates over the −40°C to +125°C junction
temperature range and is available in a 24-lead LFCSP package.
Rev. A
Document Feedback
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. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2014 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
Free Datasheet http://www.Datasheet4U.com

قانون اساسیصفحه 20
دانلود [ ADP2311 دیتاشیت ]



دیتاشیت توصیه

شماره قطعه شرح مفصل تولید کنندگان
ADP2311 Synchronous Step-Down Regulator 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    |   2018   |   تماس با ما  |   جستجو