LTM4664A
30V to 58V Input, Dual 30A, Single 60A µModule
Regulator with Digital Power System Management
FEATURES
DESCRIPTION
The LTM®4664A is a complete nonisolated 48V input
high efficiency step-down µModule® regulator with dual
30A outputs. The switching controllers, power MOSFETs,
inductors and supporting components are included. Only
external capacitors are needed to complete the design.
Operating over a 30V to 58V input voltage range, the
LTM4664A supports an output voltage of 0.5V to 1.5V at up
to 75W. An intermediate output at 25% •V is also available.
The LTM4664A product video is available IoNn the website.
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Complete 48V Input to Low Voltage Dual 30A Supply
that Can Scale to 300A, Nonisolated
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Dual Analog Loops with Digital Interface for
Compensation, Control and Monitoring
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Input Voltage Range: 30V to 58V
Output Voltage Range: 0.5V to 1.2V at 30A/Channel
3% Output Current Readback Accuracy (–20° to 125°C)
87% Efficiency for 48V to 1V at 60A, 90% at 40A
0.5% Output Voltage Accuracy Over Temperature
400kHz PMBus-Compliant I C Serial Interface
16mm × 16mm × 7.72mm BGA Package
2
The LTM4664A dual 30A regulators utilize digitally pro-
grammable analog control loops, precision data acquisition
circuitry and EEPROM with ECC. The LTM4664A’s 2-wire
serial interface allows the 30A outputs to be margined,
tuned and ramped up and down at programmable slew
rates and sequencing delay times. True input current sense,
output currents and voltages, input and output power, tem-
peratures, uptime and peak values are all readable for Dual
30A Power System Management (PSM) channels.
APPLICATIONS
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48V Systems
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Computer and Networking Equipment
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Electronic Test Equipment
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Storage Systems
Click to view associated TechClip Videos.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258,
7420359, 8163643. Licensed under U.S. Patent 7000125 and other related patents worldwide.
TYPICAL APPLICATION
48V to VCORE at 60A
48V to 1V Up to 60A
95
PINS NOT SHOWN FOR 4:1 VOLTAGE DIVIDER:
48V
CER
+
–
VOUT2_SET, OVP_TRIP, VP_SET, INSNSS2 , INSNSS2 ,
UVS1, UVS2, HYS_PRGM1, HYS_PRGM2, TIMERS1,
90
85
80
75
70
INTV
CER
CBULK
CCS1
+
–
C
C
FLY1
FLY2
TIMERS2, INSNSS1 , INSNSS1 , FAULTS1, FAULTS2
10k
PINS NOT SHOWN FOR 2-PHASE 60A SECTION:
ON/OFF
VOUTC0_CFG, VTRIMC0_CFG, VOUTC1_CFG, VTRIMC1_CFG,
FSWPH_CFG, TSNSC0a, TSNSC0b, TSNSC1a, TSNSC1b,
PWM_C0, PWM_C1, GL_C0, GL_C1, PHFLT_C0, PHFLT_C1,
INTV
CC
EXTV SHARE_CLK, SCL, SDA, ALERT, SYNC
CC,
10k
PGOODVCORE
V
PGOOD_C0
OUT2
V
OUT2
CER
C
SWC0
BULK
FREQS1
48V , 1.0V
IN
EFFICIENCY
OUT
VCORE 60A
R
FREQS1
V
OUTC0
0
10
20
30
40
50
60
FREQS2
OUTPUT CURRENT (A)
C
OUT3
R
GND
FREQS2
4664A TA01c
SGND_C0_C1
INTV
CCS1
+
V
_C0
_C0
OSNS
4.7µF
–
V
OSNS
EXTV
LTM4664A
CCS1
V
OUT2
PGOOD_C1
PGOODVCORE
EXTV
CCS2
1µF
LOAD
SWC1
V
OUTC1
INTV
CCS2
4.7µF
+
C
OUT4
IN
LTM4664A
GND
V
OUT2
CER
IN
SGND_C0_C1
V
OUTC0
V
_
INS3 C0
0.5V TO 1.2V/30A
+
DUAL
PSM
BUCK
V /4
IN
V
_C1
_C1
OSNS
V
_
INS3 C1
48V
IN
4:1 DIVIDER
V
V
DD33
OUTC1
–
V
OSNS
V
0.5V TO 1.2V/30A
DD33
10k
V
V
/2
V
OUT2
OUT1
IN
PGOODS2
4664A TA01b
PGOODS2
4664A TA01a
INTV
CC
4.7µF
PMBus
R
SEL
V
DD25
COMPH1
COMPH0
Rev. 0
1
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