LTM4630_15 Datasheet, PDF (1/34 Pages) Linear Technology – Dual 18A or Single 36A DC/DC Module Regulator

LTM4630
Dual 18A or Single 36A
DC/DC µModule Regulator
FEATURES
n _{Dual 18A or Single 36A Output}
n _{Wide Input Voltage Range: 4.5V to 15V}
n _{Output Voltage Range: 0.6V to 1.8V}
n _{±1.5% Maximum Total DC Output Error Over Line,}
Load and Temperature
n _{Differential Remote Sense Amplifier}
n _{Current Mode Control/Fast Transient Response}
n _{Adjustable Switching Frequency}
n _{Overcurrent Foldback Protection}
n _{Multiphase Parallel Current Sharing with Multiple}
LTM4630s Up to 144A
n _{Frequency Synchronization}
n _{Internal Temperature Monitor}
n _{Pin Compatible with the LTM4620 and LTM4620A (Dual}
13A, Single 26A) and LTM4628 (Dual 8A, Single 16A)
n _{Selectable Burst Mode}^® _Operation
n _{Soft-Start/Voltage Tracking}
n _{Output Overvoltage Protection}
n _{16mm × 16mm × 4.41mm LGA and 16mm × 16mm ×}
5.01mm BGA Packages
APPLICATIONS
n _{Telecom and Networking Equipment}
n _{Storage and ATCA Cards}
n _{Industrial Equipment}
DESCRIPTION
The LTM^®4630 is a dual 18A or single 36A output switching
mode step-down DC/DC µModule^® (micromodule) regula-
tor. Included in the package are the switching controllers,
power FETs, inductors, and all supporting components.
Operating from an input voltage range of 4.5V to 15V, the
LTM4630 supports two outputs each with an output voltage
range of 0.6V to 1.8V, each set by a single external resistor.
Its high efficiency design delivers up to 18A continuous
current for each output. Only a few input and output ca-
pacitors are needed. The LTM4630 is pin compatible with
the LTM4620 and LTM4620A (dual 13A, single 26A) and
the LTM4628 (dual 8A, single 16A).
The device supports frequency synchronization, multi-
phase operation, Burst Mode operation and output voltage
tracking for supply rail sequencing and has an onboard
temperature diode for device temperature monitoring. High
switching frequency and a current mode architecture enable
a very fast transient response to line and load changes
without sacrificing stability.
Fault protection features include overvoltage and
overcurrent protection. The LTM4630 is offered in 16mm
× 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm
BGA packages. The LTM4630 is ROHS compliant.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620,
6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending.
TYPICAL APPLICATION
36A, 1.2V Output DC/DC µModule Regulator
INTV_CC
4.7µF
10k
V_IN
4.5V TO 15V
10k
22µF
25V 120k
×4
5.1V
0.1µF
121k
MODE_PLLIN CLKOUT INTV_CC
V_IN
TEMP
RUN1
RUN2
TRACK1
TRACK2
LTM4630
f_SET
PHASMD
SGND GND
DIFFP
EXTV_CC PGOOD1
V_OUT1
V_OUTS1
DIFFOUT
SW1
V_FB1
V_FB2
COMP1
COMP2
V_OUTS2
V_OUT2
SW2
PGOOD2
DIFFN
PGOOD
+
100µF
6.3V
60.4k
100µF ⁺
6.3V
PGOOD
470µF
6.3V
470µF
6.3V
V_OUT
1.2V
36A
4630 TA01a
For more information www.linear.com/LTM4630
1.2V_OUT Efficiency vs I_OUT
95
V_IN = 5V
90
85
V_IN = 12V
80
75
70
65
0 2 4 6 8 10 12 14 16 18
OUTPUT CURRENT (A)
4630 TA01b
4630fa
1