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LTM4676A Datenblatt(PDF) 80 Page - Linear Technology

Teilenummer LTM4676A
Bauteilbeschribung  Dual 13A or Single 26A 關Module Regulator with Digital Power System Management
Download  136 Pages
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Hersteller  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTM4676A Datenblatt(HTML) 80 Page - Linear Technology

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LTM4676A
80
4676afa
For more information www.linear.com/LTM4676A
Typical applicaTions
CINH
22µF
×3
CINL
220µF
10k
×7
VIN
5.75V to 26.5V
PWM CLOCK SYNCH.
TIME BASE SYNCH.
• SLAVE ADDRESS = 1000101_R/W (0X45)
• 750kHz SWITCHING FREQUENCY
• NO GUI CONFIGURATION AND NO
PART-SPECIFIC PROGRAMMING REQUIRED
IN MULTI-MODULE SYSTEMS, CONFIGURING
RAIL_ADDRESS IS RECOMMENDED.
• SETTING MFR_PWM_CONFIG[7]=1b CONFIGURES THE VOUT1
CONTROL LOOP TO USE THE VOSNS0+/VOSNS0– DIFFERENTIAL-SENSE
PIN-PAIR AS THE FEEDBACK SIGNAL FOR REGULATING VOUT1.
COUT
100µF
×10
VOUT, 5V
ADJUSTABLE
UP TO 26A
OPTIONAL: INSTALLING U2 AWAY FROM HEAT SOURCES
ALLOWS INTVCC LDO LOSSES NORMALLY INCURRED BY
THE LTM4676A TO BE DISSIPATED INSTEAD BY THE LT3060.
THERMAL-DERATING CAN THUS BE IMPROVED
VIN0
VIN1
SVIN
VDD33
LOAD
SCL
SDA
ALERT
RUN0
RUN1
GPIO0
GPIO1
SYNC
SHARE_CLK
WP
4.22k
1%
±50ppm/°C
10.7k
1%
±50ppm/°C
U1
LTM4676A
4676A F42
+
16.2k
1%
±50ppm/°C
3.83k
1%
±50ppm/°C
SMBus INTERFACE WITH
PMBus COMMAND SET
ON/OFF CONTROL, FAULT
MANAGEMENT, POWER
SEQUENCING
IN
RSET1
13.3k
RSET2
1.62k
OUT
SHDN
ADJ
U2
LT3060
GND REF/BYP
VOUT0
TSNS0a
TSNS0b
ISNS0a+
ISNS0b+
ISNS0a–
ISNS0b–
VORB0+
VOSNS0+
VOSNS0–
VORB0
VORB1
VOUT1
TSNS1a
TSNS1b
ISNS1a+
ISNS1b+
ISNS1a–
ISNS1b–
VOSNS1
SGND
Figure 42. 26A, 5V Output DC/DC µModule Regulator with Serial Interface
Figure 43. Output Derating Curve of Figure 42 Circuit Tested on DC1811B-B, 12VIN, No Heat Sink
AMBIENT TEMPERATURE (°C)
30 40
0
2
6
8
10
20
22
24
26
14
50
70
4676A F43
4
16
18
12
90
120
110
60
80
100
400LFM, WITH U2, RSET1 AND RSET2 INSTALLED: θJA = 6.2°C/W
200LFM, WITH U2, RSET1 AND RSET2 INSTALLED: θJA = 7.9°C/W
400LFM, WITH U2, RSET1 AND RSET2 NOT USED: θJA = 7.3°C/W
200LFM, WITH U2, RSET1 AND RSET2 NOT USED: θJA = 8.9°C/W


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