LTM4614_15 Datasheet, PDF (1/20 Pages) Linear Technology – Dual 4A per Channel Low VIN DC/DC Module Regulator

Features
n _{Dual 4A Output Power Supply}
n _{Input Voltage Range: 2.375V to 5.5V}
n _{4A DC Typical, 5A Peak Output Current Each}
n _{0.8V Up to 5V Output Each, Parallelable}
n _{±2% Max Total DC Output Error (0°C ≤ TJ ≤ 125°C)}
n _{Output Voltage Tracking}
n _{Up to 95% Efficiency}
n _{Programmable Soft-Start}
n _{Short-Circuit and Overtemperature Protection}
n _{Power Good Indicators}
n _{Small and Very Low Profile Package:}
15mm × 15mm × 2.82mm
Applications
n _{Telecom and Networking Equipment}
n _{FPGA Power}
n _{SERDES and Other Low Noise Applications}
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks
and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 5481178, 6580258,
6304066, 6127815, 6498466, 6611131, 6724174.
LTM4614
Dual 4A per Channel
Low V_IN DC/DC
µModule Regulator
Description
The LTM^®4614 is a complete 4A dual output switching mode
step-down µModule^® regulator. Included in the package
are the switching controllers, power FETs, inductors and
all support components. The dual 4A DC/DC converters
operate over an input voltage range of 2.375V to 5.5V.
The LTM4614 supports output voltages ranging from
0.8V to 5V. The regulator output voltages are set by a
single resistor for each output. Only bulk input and output
capacitors are needed to complete the design.
The low profile package (2.82mm) enables utilization of
unused space on the bottom of PC boards for high density
point of load regulation.
Additional features include overvoltage protection, foldback
overcurrent protection, thermal shutdown and programmable
soft-start. The power module is offered in a space saving and
thermally enhanced 15mm × 15mm × 2.82mm LGA pack-
age. The LTM4614 is RoHS compliant with Pb-free finish.
Different Combinations of Input and Output Voltages
NUMBER OF INPUTS NUMBER OF OUTPUTS
2
2
I_OUT(MAX)
4A, 4A
2 (Current Share,
1
8A
Ex. 3.3V and 5V)
1
2
4A, 4A
1
1
8A, see LTM4608A
Typical Application
Dual Output 4A DC/DC µModule Regulator
V_IN1
3.3V TO 5V
V_IN2
3.3V TO 5V
V_IN1
V_OUT1
FB1
10µF
LTM4614
V_IN2
10µF
V_OUT2
FB2
GND1 GND2
10k
5.76k
V_OUT1
1.2V/4A
100µF
V_OUT2
1.5V/4A
100µF
4614 F01a
Efficiency vs Output Current
91
V_IN = 3.3V
89
87
V_OUT
1.5V
85
83
V_OUT
1.2V
81
79
77
75
0
1
2
3
LOAD CURRENT (A)
4
4614 TA01b
4614fb
1