LTM4622A
1
Rev B
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Dual Ultrathin 2A or Single 4A
Step-Down DC/DC µModule Regulator
is a complete dual 2A step-down switching
mode µModule
®
(micromodule) regulator in a tiny ultrathin
6.25mm × 6.25mm × 1.82mm LGA and 2.42mm BGA pack-
ages. Included in the package are the switching controller,
power FETs, inductor and support components. Operating
over an input voltage range of 3.6V to 20V, the LTM4622A
supports an output voltage range of 1.5V to 12V, set by a
single external resistor. Its high efficiency design delivers
dual 2A continuous, 3A peak, output current. Only a few
ceramic input and output capacitors are needed.
The LTM4622A supports selectable Burst Mode operation
and output voltage tracking for supply rail sequencing. 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 input overvoltage, output
overcurrent and overtemperature protection.
The LTM4622A is available with SnPb (BGA) or RoHS
compliant terminal finish.
Product Selection Guide
PART NUMBER V
IN
RANGE
V
OUT
RANGE
I
OUT
LTM4622
3.6V to 20V
0.6V to 5.5V
Dual 2.5A or Single 5A
LTM4622A
1.5V to 12V
Dual 2A or Single 4A
3.3V and 5V Dual Output DC/DC Step-Down µModule Regulator
12V Input, 3.3V and 5V Output,
Efficiency vs Load Current
APPLICATIONS
n
Complete Solution in <1cm
2
n
Wide Input Voltage Range: 3.6V to 20V
n
1.5V to 12V Output Voltage
n
Dual 2A (3A Peak) or Single 4A Output Current
n
±1.5% Maximum Total Output Voltage Regulation
Error Over Load, Line and Temperature
n
Current Mode Control, Fast Transient Response
n
External Frequency Synchronization
n
Multiphase Parallelable with Current Sharing
n
Output Voltage Tracking and Soft-Start Capability
n
Selectable Burst Mode
®
Operation
n
Overvoltage Input and Overtemperature Protection
n
Power Good Indicators
n
6.25mm × 6.25mm × 1.82mm LGA and
6.25mm × 6.25mm × 2.42mm BGA Packages
n
General Purpose Point-of-Load Conversion
n
Telecom, Networking and Industrial Equipment
n
Medical Diagnostic Equipment
n
Test and Debug Systems
All registered trademarks and trademarks are the property of their respective owners.
LOAD CURRENT (A)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0
70
75
80
85
90
95
100
EFFICIENCY (%)
4622A TA01b
V
OUT
= 5V
V
OUT
= 3.3V
13.3k
4622A TA01a
4.7µF
25V
V
IN
8V TO 20V
V
OUT1
3.3V, 2A
47µF
V
OUT1
V
OUT2
5V, 2A
47µF
V
OUT2
FB1
COMP1
COMP2
GND
LTM4622A
PGOOD1
PGOOD2
V
IN2
V
IN1
RUN1
RUN2
INTVCC
SYNC/MODE
TRACK/SS1
TRACK/SS2
FREQ
8.25k
FB2
