EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC3720EGN#PBF

Description
DC/DC Cntrlr Single-OUT Step Down 300kHz 28-Pin SSOP N Tube
File Size286KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC3720EGN#PBF Overview

DC/DC Cntrlr Single-OUT Step Down 300kHz 28-Pin SSOP N Tube

LTC3720EGN#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Number of Outputs1
TopologyStep Down
Output Voltage (V)1.05 to 1.825
Maximum Switching Frequency (kHz)300
Minimum Input Voltage (V)4
Maximum Input Voltage (V)36
Operating Supply Voltage (V)4 to 36
Maximum Supply Current (mA)2
Minimum Switching Frequency (kHz)150
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Pin Count28
Standard Package NameSOP
Supplier PackageSSOP N
MountingSurface Mount
Package Height1.5(Max)
Package Length9.98(Max)
Package Width3.99(Max)
PCB changed28
Lead ShapeGull-wing
LTC3720
Single Phase VRM8.5
Current Mode Step-Down Controller
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
5-Bit Programmable Output Voltage:
1.05V to 1.825V (VRM8.5)
No Sense Resistor Required
2% to 87% Duty Cycle at 200kHz
t
ON(MIN)
100ns
Supports Active Voltage Positioning
True Current Mode Control
Stable with Ceramic C
OUT
Dual N-Channel MOSFET Synchronous Drive
Power Good Output Voltage Monitor
Wide V
IN
Range: 4V to 36V
±1%
0.8V Reference
Adjustable Current Limit
Adjustable Switching Frequency
Forced Continuous Control Pin
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Micropower Shutdown: I
Q
< 30µA
Available in 28-Lead Narrow SSOP Package
The LTC
®
3720 is a synchronous step-down switching
regulator controller for CPU power. An output voltage
between 1.05V and 1.825V is selected by a 5-bit code
(Intel VRM8.5 VID specification). The controller uses a
valley current control architecture to deliver very low duty
cycles without requiring a sense resistor. Operating fre-
quency is selected by an external resistor and is compen-
sated for variations in V
IN
and V
OUT
.
Discontinuous mode operation provides high efficiency
operation at light loads. A forced continuous control pin
reduces noise and RF interference and can assist second-
ary winding regulation by disabling discontinuous mode
operation when the main output is lightly loaded.
Fault protection is provided by internal foldback current
limiting, an output overvoltage comparator and optional
short-circuit shutdown timer. Soft-start capability for sup-
ply sequencing is accomplished using an external timing
capacitor. The regulator current limit level is also user
programmable. Wide supply range allows operation from
4V to 36V at the input.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No R
SENSE
is a trademark of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
APPLICATIO S
s
s
Power Supplies for Pentium
®
Processors
Notebook Computers and Servers
TYPICAL APPLICATIO
LTC3720
PGOOD
I
ON
0.1µF
RUN/SS
470pF
20k
SGND
BOOST
V
CC
INTV
CC
VID4
VID3
5-BIT VID
VID2
VID1
VID0
SENSE
+
BG
PGND
SENSE¯
V
OSENSE
I
TH
V
IN
TG
SW
330k
IRF7811W
×2
0.33µF
CMDSH-3
L1
1µH
10µF
×5
V
IN
5V TO 24V
+
UPS840
+
C
OUT
270µF
2V
×4
EFFICIENCY (%)
V
OUT
1.05V TO 1.825V
20A
4.7µF
IRF7811W
×3
C
OUT
: CORNELL DUBILIER
ESRE271M02B
L1: SUMIDA CEP125-IROMC
3720 F01a
Figure 1. High Efficiency Step-Down Converter
U
Efficiency vs Output Current
100
V
OUT
= 1.45V
95 L1 = 1µH
90
85
80
75
70
65
60
55
0.01
1
10
0.1
OUTPUT CURRENT (A)
100
3720 F01b
U
U
V
IN
= 5V
V
IN
= 15V
3720f
1
I would like to ask why the data in ATmega16 EEPROM cannot be saved after power failure? ? ? ?
Here is a small program I wrote to write 0X08 to 0X02 in EEPROM: #include #includevoid port_init(void) {PORTA = 0xFF;DDRA= 0xFF;PORTB = 0x00;DDRB= 0x00;PORTC = 0x00; //m103 output onlyDDRC= 0x00;PORTD...
bingyannan Embedded System
I want a 4-layer PCB for study.
I have only been in contact with circuits for a short time. I want to find a 4-layer PCB board to see how others design multi-layer boards. Thank you everyone...
曹伟1993 PCB Design
2010 EEWORLD Person of the Year Selection Results Announced
The results of the 2010 EEWORLD Person of the Year selection have been announced. First of all, I would like to thank everyone for their support of EEWORLD 's work over the past year, thank the selfle...
EEWORLD社区 Suggestions & Announcements
The cc2430 circuit board cannot run the 2006 protocol stack. Is there something wrong with the Mac?
I would like to ask everyone:I designed a cc2430 circuit board with no peripheral devices, which is basically the same as Wireless Dragon's early products.When I downloaded the 2006 protocol stack, th...
yang_kuiwu RF/Wirelessly
Ask a SQL Server subscription and publishing question
I want to create a publication on my PC and then use SQL CE to subscribe to it. Do I need to set different login names for creating the publication and subscribing to the publication? How do I set it?...
zqrain Embedded System
rtos's story on Mars (reprinted)
[align=left][font=宋体][size=2]When the Spirit and Opportunity landed on Mars and stirred up a new wave of Mars fever, I found this article I translated last year to read the episode of that year. Since...
jorya_txj Embedded System

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1993  2209  1828  896  2762  41  45  37  19  56 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号