LTM4614 Datasheet, PDF (1/20 Pages) Linear Technology – Dual 4A per Channel Low VIN DC/DC μModule 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% 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
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 DC/DC power supply. 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 ca-
pacitors 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
package. The LTM4614 is Pb-free and RoHS compliant.
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
4614fa
1