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MAX8855AETJ+

Description
voltage regulators - switching regulators dual 5A 2mhz step-down regulator
CategoryPower/power management    The power supply circuit   
File Size287KB,20 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
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MAX8855AETJ+ Overview

voltage regulators - switching regulators dual 5A 2mhz step-down regulator

MAX8855AETJ+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFN
package instructionHVQCCN, LCC32,.2SQ,20
Contacts32
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time21 weeks
Other featuresALSO OPERATES IN ADJUSTABLE MODE FROM 0.6V TO 3.24V
Analog Integrated Circuits - Other TypesDUAL SWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage3.6 V
Minimum input voltage2.3 V
Nominal input voltage3.3 V
JESD-30 codeS-XQCC-N32
length5 mm
Humidity sensitivity level1
Number of functions1
Number of terminals32
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current9.6 A
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC32,.2SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationPHASE-SHIFT
Maximum switching frequency2200 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width5 mm
19-0726; Rev 4; 10/11
KIT
ATION
EVALU
BLE
AVAILA
Dual, 5A, 2MHz Step-Down Regulators
General Description
Features
o
27mΩ On-Resistance Internal MOSFETs
o
Dual, 5A, PWM Step-Down Regulators
o
Fully Protected Against Overcurrent,
Short Circuit, and Overtemperature
o
±1% Output Accuracy Over Load, Line,
and Temperature
o
Operates from 2.25V to 3.6V Supply
o
REFIN on One Channel for Tracking or
External Reference
o
Integrated Boost Diodes
o
Adjustable Output from 0.6V to 0.9 x V
IN
o
Soft-Start Reduces Inrush Supply Current
o
0.5MHz to 2MHz Adjustable Switching,
or FSYNC Input
o
All-Ceramic-Capacitor Design
o
180° Out-of-Phase Operation Reduces Input
Ripple Current
o
Individual Enable Inputs and PWRGD Outputs
o
Safe-Start into Prebiased Output
o
Available in 5mm x 5mm Thin QFN Package
o
Sink/Source Current in DDR Applications
MAX8855/MAX8855A
The MAX8855/MAX8855A high-efficiency, dual step-down
regulators are capable of delivering up to 5A at each out-
put. The devices operate from a 2.25V to 3.6V supply, and
provide output voltages from 0.6V to 0.9 x V
IN
, making them
ideal for on-board point-of-load applications. Total output
error is less than ±1% over load, line, and temperature.
The MAX8855/MAX8855A operate in PWM mode with a
switching frequency ranging from 0.5MHz to 2MHz, set
by an external resistor. It can also be synchronized to
an external clock in the same frequency range. Two
internal switching regulators operate 180° out-of-phase
to reduce the input ripple current, and consequently
reduce the required input capacitance. The high
operating frequency minimizes the size of external
components. High efficiency, internal dual-nMOS
design keeps the board cool under heavy loads. The
voltage-mode control architecture and the high-band-
width (> 15MHz typ) voltage-error amplifier allow a type
III compensation scheme to be utilized to achieve fast
response under both line and load transients, and also
allow for ceramic output capacitors.
Programmable soft-start reduces input inrush current.
Two enable inputs allow the turning on/off of each out-
put individually, resulting in great flexibility for system-
level designs. A reference input is provided to facilitate
output-voltage tracking applications. The MAX8855/
MAX8855A are available in a 32-pin TQFN (5mm x 5mm)
package with 0.8mm max height.
Ordering Information
PART
MAX8855ETJ+
MAX8855AETJ+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 TQFN-EP*
32 TQFN-EP*
Applications
ASIC/CPU/DSP Power Supplies
DDR Power Supplies
Set-Top Box Power Supplies
Printer Power Supplies
Network Power Supplies
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Typical Operating Circuit
INPUT1
2.25V TO 3.6V
IN1 IN2
BST1
BST2
LX1
LX2
INPUT2
2.25V TO 3.6V
OUTPUT1
1.2V / 5A
OUTPUT2
1.5V / 5A
PGND1
PGND2
MAX8855/
MAX8855A
FB1
FB2
COMP1
TYPE III
COMPENSATION
COMP2
TYPE III
COMPENSATION
PWRGD1 PWRGD2
ON
OFF
EN1
GND
EN2
OFF
ON
Pin Configuration appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

MAX8855AETJ+ Related Products

MAX8855AETJ+ MAX8855AETJ+T MAX8855ETJ+T
Description voltage regulators - switching regulators dual 5A 2mhz step-down regulator voltage regulators - switching regulators dual 5A 2mhz step-down regulator voltage regulators - switching regulators dual 5A 2mhz step-down regulator
Is it Rohs certified? conform to conform to conform to
Maker Maxim Maxim Maxim
package instruction HVQCCN, LCC32,.2SQ,20 HVQCCN, QCCN, LCC32,.2SQ,20
Reach Compliance Code compli compliant compliant
ECCN code EAR99 EAR99 EAR99
Factory Lead Time 21 weeks 21 weeks 22 weeks
control mode VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE
JESD-30 code S-XQCC-N32 S-XQCC-N32 S-PQCC-N32
Number of terminals 32 32 32
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Package body material UNSPECIFIED UNSPECIFIED PLASTIC/EPOXY
encapsulated code HVQCCN HVQCCN QCCN
Package shape SQUARE SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER
surface mount YES YES YES
Maximum switching frequency 2200 kHz 2200 kHz 1100 kHz
technology BICMOS BICMOS BICMOS
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal form NO LEAD NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm 0.5 mm
Terminal location QUAD QUAD QUAD
Is it lead-free? Lead free - Lead free
Other features ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6V TO 3.24V OPERATES IN ADJUSTABLE MODE FROM 0.6V TO 3.24V -
Analog Integrated Circuits - Other Types DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER -
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION -
Maximum input voltage 3.6 V 3.6 V -
Minimum input voltage 2.3 V 2.25 V -
Nominal input voltage 3.3 V 3.3 V -
length 5 mm 5 mm -
Humidity sensitivity level 1 - 1
Number of functions 1 1 -
Maximum output current 9.6 A 9.6 A -
Encapsulate equivalent code LCC32,.2SQ,20 - LCC32,.2SQ,20
Peak Reflow Temperature (Celsius) NOT SPECIFIED - 225
Certification status Not Qualified - Not Qualified
Maximum seat height 0.8 mm 0.8 mm -
Switch configuration PHASE-SHIFT PHASE-SHIFT -
Maximum time at peak reflow temperature NOT SPECIFIED - NOT SPECIFIED
width 5 mm 5 mm -
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