Regulator. LTM4603-1 Datasheet

LTM4603-1 Datasheet PDF

Part LTM4603-1
Description 6A DC/DC uModule Regulator
Feature Features n Complete Switch Mode Power Supply n Wide Input Voltage Range: 4.5V to 20V n 6A DC Typi.
Manufacture Linear Technology
Datasheet
Download LTM4603-1 Datasheet

Features n Complete Switch Mode Power Supply n Wide Input LTM4603-1 Datasheet





LTM4603-1
Features
n Complete Switch Mode Power Supply
n Wide Input Voltage Range: 4.5V to 20V
n 6A DC Typical, 8A Peak Output Current
n 0.6V to 5V Output Voltage
n Output Voltage Tracking and Margining
n Remote Sensing for Precision Regulation (LTM4603
Only)
n Typical Operating Frequency: 1MHz
n PLL Frequency Synchronization
n 1.5% Regulation
n Current Foldback Protection (Disabled at Start-Up)
n Pin Compatible with the LTM4601
n Pb-Free (e4) RoHS Compliant Package with Gold
Finish Pads
n Ultrafast Transient Response
n Current Mode Control
n Up to 93% Efficiency at 5VIN, 3.3VOUT
n Programmable Soft-Start
n Output Overvoltage Protection
n Small Footprint, Low Profile (15mm × 15mm ×
2.82mm) Surface Mount LGA Package
Applications
n Telecom and Networking Equipment
n Servers
n Industrial Equipment
n Point of Load Regulation
LTM4603/LTM4603-1
20V, 6A DC/DC µModule
Regulator with PLL, Output
Tracking and Margining
Description
The LTM®4603 is a complete 6A step-down switch mode
DC/DC µModule® regulator with onboard switching con-
troller, MOSFETs, inductor and all support components.
The device is housed in a small surface mount 15mm ×
15mm × 2.82mm LGA package. Operating over an input
voltage range of 4.5V to 20V, the LTM4603 supports an
output voltage range of 0.6V to 5V as well as output volt-
age tracking and margining. The high efficiency design
delivers 6A continuous current (8A peak). Only bulk input
and output capacitors are needed to complete the design.
The low profile (2.82mm) and light weight (1.7g) package
easily mounts on the unused space on the back side of
PC boards for high density point of load regulation. The
µModule regulator can be synchronized with an external
clock for reducing undesirable frequency harmonics and
allows PolyPhase® operation for high load currents.
A high switching frequency and adaptive on-time current
mode architecture deliver a very fast transient response
to line and load changes without sacrificing stability. An
onboard remote sense amplifier can be used to accurately
regulate an output voltage independent of load current.
The onboard remote sense amplifier is not available in the
LTM4603-1. The LTM4603/LTM4603-1 are pin compatible
with the 12A LTM4601/LTM4601-1.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Typical Application
1.5V/6A Power Supply with 4.5V to 20V Input
VIN
4.5V TO 20V
CIN
CLOCK SYNC
TRACK/SS CONTROL
ON/OFF
392k
VIN
PGOOD
PLLIN TRACK/SS
VOUT
RUN
COMP
INTVCC
DRVCC
MPGM
LTM4603
SGND PGND
VFB
MARG0
MARG1
VOUT_LCL
DIFFVOUT
VOSNS+
VOSNS–
fSET
100pF
MARGIN
CONTROL
40.2k
VOUT
1.5V
6A
COUT
5% MARGIN
4603 TA01a
Efficiency vs Load Current with 12VIN
100
95
90
85
80
75
70
65
60
55
50
45
40
0
1
12VIN, 1.2VOUT
12VIN, 1.5VOUT
12VIN, 1.8VOUT
12VIN, 2.5VOUT
12VIN, 3.3VOUT
12VIN, 5VOUT
2 34 5 6 7
LOAD CURRENT (A)
4603 TA01b
4603fb
1



LTM4603-1
LTM4603/LTM4603-1
Absolute Maximum Ratings
(Note 1)
INTVCC, DRVCC, VOUT_LCL, VOUT (VOUT ≤ 3.3V
with Remote Sense Amp)............................. –0.3V to 6V
PLLIN, TRACK/SS, MPGM, MARG0, MARG1,
PGOOD, fSET...............................–0.3V to INTVCC + 0.3V
RUN.............................................................. –0.3V to 5V
VFB, COMP................................................. –0.3V to 2.7V.
VVOINS.N..S..+..,..V..O..S..N..S.........................................................–..0....3..V...t.o...I.N–T0V.3CVC
to 20V
+ 0.3V
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature............................................ 125°C
Storage Temperature Range................... –55°C to 125°C
Pin Configuration
TOP VIEW
VIN fSET
MARG0
MARG1
PGND
DRVCC
VFB
PGOOD
VOUT
SGND
VOSNS+/NC2*
DIFFVOUT/NC3*
VOUT_LCL
VOSNS–/NC1*
LGA PACKAGE
118-LEAD (15mm × 15mm × 2.82mm)
TJMAX = 125°C, θJA = 15°C/W, θJC = 6°C/W
θJA DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS, WEIGHT = 1.7g
*LTM4603-1 ONLY
Order Information
LEAD FREE FINISH
TRAY
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTM4603EV#PBF
LTM4603EV#PBF
LTM4603V
118-Lead (15mm × 15mm × 2.82mm) LGA –40°C to 85°C
LTM4603IV#PBF
LTM4603IV#PBF
LTM4603V
118-Lead (15mm × 15mm × 2.82mm) LGA –40°C to 85°C
LTM4603EV-1#PBF
LTM4603EV-1#PBF LTM4603V-1
118-Lead (15mm × 15mm × 2.82mm) LGA –40°C to 85°C
LTM4603IV-1#PBF
LTM4603IV-1#PBF
LTM4603V-1
118-Lead (15mm × 15mm × 2.82mm) LGA –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
See Note 2.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
Electrical Characteristics The l denotes the specifications which apply over the –40°C to 85°C
operating temperature range (Note 2), otherwise specifications are at TA = 25°C, VIN = 12V, per typical application (front page)
configuration.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN(DC)
VOUT(DC)
Input DC Voltage
Output Voltage
Input Specifications
CIN = 10µF ×2, COUT = 2× 100µF X5R Ceramic
VIN = 5V, VOUT = 1.5V, IOUT = 0A
VIN = 12V, VOUT = 1.5V, IOUT = 0A
l
l
l
4.5
1.478
1.478
1.5
1.5
20
1.522
1.522
V
V
V
VIN(UVLO)
IINRUSH(VIN)
Undervoltage Lockout Threshold
Input Inrush Current at Start-Up
IOUT = 0A
IOUT = 0A. VOUT = 1.5V
VIN = 5V
VIN = 12V
3.2 4
0.6
0.7
V
A
A
4603fb
2




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