LTM4620A Datasheet, PDF (1/36 Pages) Linear Technology – Dual 13A or Single 26A DC/DC μModule Regulator Frequency Synchronization

LTM4620A
Dual 13A or Single 26A
DC/DC µModule Regulator
Features
Description
n _{Dual 13A or Single 26A Output}
n _{Wide Input Voltage Range: 4.5V to 16V}
n _{Output Voltage Range: 0.6V to 5.3V}
n _{±1.5% Maximum Total DC Output Error}
n _{Multiphase Current Sharing with Multiple}
LTM4620As Up to 100A
n _{Higher Efficiency and Wider VOUT Range Than LTM4620}
n _{Differential Remote Sense Amplifier}
n _{Current Mode Control/Fast Transient Response}
n _{Adjustable Switching Frequency}
n _{Overcurrent Foldback Protection}
n _{Frequency Synchronization}
n _{Internal Temperature Sensing Diode Output}
n _{Output Overvoltage Protection}
n _{Pin Compatible with the LTM4628 (Dual 8A) and}
LTM4620 (Dual 13A)
n _{15mm × 15mm × 4.41mm LGA Package}
Applications
n _{Telecom and Networking Equipment}
n _{Industrial Equipment}
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.
The LTM^®4620A is a complete dual 13A, or single 26A output
switching mode DC/DC power supply with wider V_OUT range
and higher efficiency than the LTM4620. Included in the
package are the switching controller, power FETs, inductors
and all supporting components. Operating from an input
voltage range of 4.5V to 16V, the LTM4620A supports two
outputs each with an output voltage range of 0.6V to 5.3V,
set by a single external resistor. Its high efficiency design
delivers up to 13A continuous current for each output. Only
a few input and output capacitors are needed.
The device supports frequency synchronization, multiphase
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 over-
current protection. The power module is offered in a
proprietary space saving and thermally enhanced 15mm
× 15mm × 4.41mm LGA package. The LTM4620A is
RoHS compliant.
Typical Application
26A, 5V Output DC/DC µModule^® Regulator
V_IN
7V TO 16V
10k*
22µF
25V ^120k
×4
5.1V*
0.1µF INTVCC
* PULL-UP RESISTOR AND
ZENER ARE OPTIONAL
INTV_CC
4.7µF
V_OUT
INTV_CC
5k
MODE_PLLIN CLKOUT INTV_CC
V_IN
TEMP
RUN1
RUN2
TRACK1
TRACK2
LTM4620A
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
×2
220pF
8.25k
100µF
6.3V
×2
PGOOD
V_OUT
5V
26A
4620A TA01a
For more information www.linear.com/4620A
5V Efficiency vs I_OUT
100
95
90
85
8V TO 5V EFF (650kHz)
12V TO 5V EFF (750kHz)
80
1 3 5 8 10 12 14 16 19 21 23
TOTAL OUTPUT CURRENT (A)
4620A TA01b
4620af
1