LTM4624_15 Datasheet, PDF (1/26 Pages) Linear Technology – 14VIN, 4A Step-Down DC/DC Module Regulator

LTM4624
14V_IN, 4A Step-Down DC/DC
µModule Regulator
Features
n _{Complete Solution in <1cm}² _{(Single-Sided PCB) or}
0.5cm² (Dual-Sided PCB)
n _{Wide Input Voltage Range: 4V to 14V}
n _{Input Voltage Down to 2.375V with External Bias}
n _{0.6V to 5.5V Output Voltage}
n _{4A DC, 5A Peak Output Current}
n _{±2% Total DC Output Voltage Error}
n _{Current Mode Control, Fast Transient Response}
n _{Output Voltage Tracking}
n _{Selectable Discontinuous Mode}
n _{Power Good Indicator}
n _{Overvoltage, Overcurrent and Overtemperature}
Protection
n _{6.25mm × 6.25mm × 5.01mm BGA Package}
Applications
n _{Telecom, Datacom, Networking and Industrial}
Equipment
n _{Medical Diagnostic Equipment}
n _{Data Storage Rack Units and Cards}
n _{Test and Debug Systems}
Description
The LTM^®4624 is a complete 4A step-down switching mode
µModule^® (micromodule) regulator in a tiny 6.25mm ×
6.25mm × 5.01mm BGA package. Included in the package
are the switching controller, power FETs, inductor and sup-
port components. Operating over an input voltage range of
4V to 14V or 2.375V to 14V with an external bias supply,
the LTM4624 supports an output voltage range of 0.6V to
5.5V, set by a single external resistor. Its high efficiency
design delivers 4A continuous, 5A peak, output current.
Only bulk input and output capacitors are needed.
The LTM4624 supports selectable discontinuous mode
operation and output voltage tracking for supply rail se-
quencing. Its high switching frequency and current mode
control enable a very fast transient response to line and
load changes without sacrificing stability.
Fault protection features include overvoltage, overcurrent
and overtemperature protection.
The LTM4624 is available with SnPb (BGA) or RoHS
compliant terminal finish.
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.
Click to view associated TechClip Videos.
Typical Application
4A, 1.5V Output DC/DC µModule Step-Down Regulator
V_IN
4V TO 14V
10µF
16V
0.1µF
V_IN
V_OUT
SV_IN
RUN _LTM4624
INTV_CC
PGOOD
MODE
COMP
TRACK/SS
FB
FREQ
GND SGND
V_OUT
1.5V
47µF _4A
6.3V
40.2k
4624 TA01a
12V_IN Efficiency vs Load Current
100
95
90
85
80
75
70
V_OUT = 5V
65
V_OUT = 3.3V
60
V_OUT = 2.5V
V_OUT = 1.5V
55
V_OUT = 1.2V
V_OUT = 1V
50
0
1
2
3
4
LOAD CURRENT (A)
4624 TA01b
For more information www.linear.com/LTM4624
4624fc
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