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19-5966; Rev 0; 6/11
E V A L U A T I O N K I T A V A I L A B L E
MAX15112
High-Efficiency, 12A, Current-Mode Synchronous
Step-Down Regulator with Integrated Switches
General Description
Features
SꢀContinuousꢀ12AꢀOutputꢀCurrentꢀOverꢀTemperature
The MAX15112 high-efficiency, current-mode step-down
regulator with integrated power switches operates from
2.7V to 5.5V and delivers up to 12A of output current in a
small 2mm x 3mm package. The MAX15112 offers excel-
lent efficiency with skip mode capability at light-load con-
ditions, yet provides unmatched efficiency under heavy
load conditions. The combination of small size and high
efficiency makes this device suitable for both portable
and nonportable applications.
Sꢀ 1ꢁꢀFeedbackꢀAccuracyꢀOverꢀLoad,ꢀLine,ꢀandꢀ
Temperature
SꢀOperatesꢀfromꢀ2.7Vꢀtoꢀ5.5VꢀSupply
SꢀInputꢀUndervoltageꢀLockout
Sꢀ AdjustableꢀOutputꢀRangeꢀfromꢀ0.6VꢀUpꢀtoꢀ0.94ꢀxꢀV
SꢀProgrammableꢀSoft-Start
IN
SꢀFactory-Trimmedꢀ1MHzꢀSwitchingꢀFrequency
The MAX15112 utilizes a current-mode control architecture
with a high-gain transconductance error amplifier, which
allows a simple compensation scheme and enables a
cycle-by-cycle current limit with fast response to line and
load transients. A factory-trimmed switching frequency of
1MHz (PWM operation) allows for a compact, all-ceramic
capacitor design.
SꢀStableꢀwithꢀLow-ESRꢀCeramicꢀOutputꢀCapacitors
SꢀSafe-StartupꢀintoꢀaꢀPrebiasedꢀOutput
SꢀExternalꢀReferenceꢀInput
SꢀSelectableꢀSkipꢀModeꢀOptionꢀforꢀImprovedꢀ
EfficiencyꢀatꢀLightꢀLoads
SꢀEnableꢀInput/PGOODꢀOutputꢀAllowsꢀSequencingꢀ
SꢀRemoteꢀGroundꢀSenseꢀforꢀImprovedꢀAccuracy
SꢀThermalꢀandꢀOvercurrentꢀProtection
Integrated switches with low on-resistance ensure high
efficiency at heavy loads while minimizing critical induc-
tances. The MAX15112’s simple layout and footprint
assure first-pass success in new designs.
SꢀTinyꢀ2.10mmꢀxꢀ3.05mm,ꢀ24-BumpꢀWLPꢀPackage
Other features of the MAX15112 include a capacitor-
programmable soft-start to reduce inrush current, safe
startup into a prebiased output, an enable input, and a
power-good output for power sequencing.
Applications
Notebooks
Servers
Distributed Power Systems
DDR Memory
Base Stations
The regulator is available in a 24-bump (4 x 6), 2.10mm
x 3.05mm WLP package, and is fully specified over the
-40NC to +85NC extended temperature range.
Ordering Information appears at end of data sheet.
Typical Operating Circuits
ON
EN
BST
OFF
C
BST
L
OUT
SKIP
AIN
V
OUT
LX
C
OUT
V
= 2.7V TO 5.5V
IN
MAX15112
R1
GSNS
IN
C
IN
FB
R
PULL
PGOOD
PGOOD
COMP
R2
SS/REFIN
GND
R
C
C
C
CC
C
SS
C
PWM MODE OPERATION
Typical Operating Circuits continued at end of data sheet.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX15112.related
Forꢀpricing,ꢀdelivery,ꢀandꢀorderingꢀinformation,ꢀpleaseꢀcontactꢀMaximꢀDirectꢀatꢀ1-888-629-4642,ꢀ
orꢀvisitꢀMaxim’sꢀwebsiteꢀatꢀwww.maxim-ic.com.