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LTM4630A fiches techniques PDF

Linear Technology - Dual 18A or Single 36A DC/DC uModule Regulator

Numéro de référence LTM4630A
Description Dual 18A or Single 36A DC/DC uModule Regulator
Fabricant Linear Technology 
Logo Linear Technology 





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LTM4630A fiche technique
LTM4630A
Dual 18A or Single 36A
DC/DC µModule Regulator
Features
n Dual 18A or Single 36A Output
n Input Voltage Range: 4.5V to 15V
n Output Voltage Range: 0.6V to 5.3V
n ±1.5% Maximum Total DC Output Error Over Line,
Load and Temperature
n Higher Light Load Efficiency and Wider VOUT Range
Than LTM4630
n Differential Remote Sense Amplifier
n Current Mode Control/Fast Transient Response
n Multiphase Parallel Current Sharing Up to 144A
n Internal Temperature Monitor
n Pin Compatible with the LTM4620A (Dual 13A,
Single 26A) and LTM4630 (Dual 18A, Single 36A)
n Adjustable Switching Frequency or Synchronization
n Overcurrent Foldback Protection
n Selectable Burst Mode® Operation, Pulse Skipping
Mode Operation
n Soft-Start/Voltage Tracking
n Output Overvoltage Protection
n 16mm × 16mm × 4.41mm LGA Package
Applications
n Telecom and Networking Equipment
n Storage and ATCA Cards
n Industrial Equipment
Description
The LTM®4630A is a dual 18A or single 36A output switch-
ing mode step-down DC/DC µModule® (micromodule)
regulator with wider VOUT range and higher efficiency
than LTM4630. Included in the package are the switch-
ing controllers, power FETs, inductors and all supporting
components. Operating from an input voltage range of
4.5V to 15V, the LTM4630A supports two outputs each
with an output voltage range of 0.6V to 5.3V, 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 capacitors are needed. The LTM4630A
is pin compatible with the LTM4620 and LTM4620A (dual
13A, single 26A) and the LTM4630 (dual 18A, single 36A).
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 LTM4630A is offered in 16mm
× 16mm × 4.41mm LGA package.
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
INTVCC
4.7µF
VIN
4.5V TO 15V
22µF
25V 120k
×4
0.1µF
PINS UNUSED IN
THIS APPLICATION:
CLKOUT
EXTVCC
SW1
SW2
VOUTS2
75k
10k
PGOOD
INTVCC
VIN
TEMP
TRACK1
TRACK2
fSET
RUN1
RUN2
PHASMD
SGND
PGOOD1
LTM4630A
PGOOD2
VOUT1
VOUTS1
DIFFOUT
VFB1
VFB2
COMP1
COMP2
VOUT2
DIFFP
DIFFN
GND MODE_PLLIN
4630A TA01a
100µF +
6.3V
60.4k
100µF
6.3V
470µF
6.3V
+
VOUT
470µF
6.3V
For more information www.linear.com/LTM4630A
1E.ff2iVciOeUnTcyanvds 3IO.U3TVOUT
100
95
90
85
80
75 12 VIN, 1.2VOUT, 300kHz
70
12 VIN, 3.3VOUT, 600kHz
5 VIN, 1.2VOUT, 300kHz
5 VIN, 3.3VOUT, 500kHz
65
0 2 4 6 8 10 12 14 16 18
LOAD CURRENT (A)
4630A TA01b
4630af
1

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