IC Phoenix
 
Home ›  MM80 > MAX8554EEE,4.5V to 28V Input / Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications
MAX8554EEE Fast Delivery,Good Price
Part Number:
If you need More Quantity or Better Price,Welcom Any inquiry.
We available via phone +865332716050 Email
Partno Mfg Dc Qty AvailableDescript
MAX8554EEEMAXIMN/a420avai4.5V to 28V Input / Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications


MAX8554EEE ,4.5V to 28V Input / Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load ApplicationsELECTRICAL CHARACTERISTICS(V = V = +12V, V = V = +2.5V, V = +5V, C = 4.7µF, C = 1µF, C = 0.22µF, V ..
MAX8554EEE+ ,4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load ApplicationsFeaturesThe MAX8553 is a 4.5V to 28V input-voltage, synchro-♦ Up to 25A Output-Current Capabilityno ..
MAX8555AEUB ,Low-Cost, High-Reliability, 0.5V to 3.3V ORing MOSFET ControllersFeaturesCritical loads often employ parallel-connected power♦ Simple, Integrated, and Inexpensive M ..
MAX8555AEUB ,Low-Cost, High-Reliability, 0.5V to 3.3V ORing MOSFET ControllersApplications*Exposed paddlePoint-of-Load SuppliesPin ConfigurationsPower-Supply ModulesServersTOP V ..
MAX8555AEUB+ ,Low-Cost, High-Reliability, 0.5V to 3.3V ORing MOSFET ControllersFeaturesCritical loads often employ parallel-connected power♦ Simple, Integrated, and Inexpensive M ..
MAX8556ETE ,PLASTIC ENCAPSULATED DEVICESTable of Contents I. ........Device Description V. ........Quality Assurance Information II ..
MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY
MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY
MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY
MB82D01171A-80LLPBN , 16 Mbit (1 M word x 16 bit) Mobile Phone Application Specific Memory
MB82D01171A-80LLPBN , 16 Mbit (1 M word x 16 bit) Mobile Phone Application Specific Memory
MB82D01171A-90LLPBT , 16 Mbit (1 M word x 16 bit) Mobile Phone Application Specific Memory


MAX8554EEE
4.5V to 28V Input / Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications
General Description
The MAX8553 is a 4.5V to 28V input-voltage, synchro-
nous step-down controller that provides a complete
power-management solution for DDR memory. The
MAX8553 generates 1/2 VREFINvoltage for VTT and
VTTR. The VTT and VTTR tracking voltages are main-
tained within 1% of 1/2 VREFIN. The MAX8554 is a 4.5V to
28V input voltage, nontracking step-down controller with
a low 0.6V feedback threshold voltage. The MAX8553/
MAX8554 use Maxim’s proprietary Quick-PWM™ archi-
tecture for fast transient response and operate with
selectable pseudo-fixed frequencies. Both controllers
can operate without an external bias supply.
The controllers operate in synchronous-rectification mode
to ensure balanced current sourcing and sinking capabili-
ty of up to 25A. The MAX8553/MAX8554 also provide up
to 95% efficiency, making them ideal for server and point-
of-load applications. Additionally, a low 5µA shutdown
current allows for longer battery life in notebook applica-
tions. Lossless current monitoring is achieved by monitor-
ing the low-side MOSFET’s drain-to-source voltage. The
MAX8553/MAX8554 have an adjustable foldback current
limit to withstand a continuous output overload and short
circuit. Digital soft-start provides control of inrush current
during power-up. Overvoltage protection shuts the con-
verter down and discharges the output capacitor. The
MAX8553/MAX8554 come in space-saving 16-pin QSOP
packages.
Applications

Wide-Input Power Supplies
Servers and Storage Applications
ASIC and CPU Core Voltages
Notebook and LCD-PC Power Supplies
DDR I and DDR II Memory Power Supplies
AGTL Bus Termination Supplies
Features
Up to 25A Output-Current CapabilityQuick-PWM Control for Fast Loop ResponseUp to 95% Efficiency4.5V to 28V Input Voltage RangeNo External Bias Supply Required0 to 3.6V Input REFIN Range (MAX8553)Automatically Sets VTT and VTTR to within ±1%
of 1/2 VREFIN- (MAX8553)
Low 0.6V Feedback Threshold (MAX8554)200kHz/300kHz/400kHz/550kHz Selectable
Switching Frequencies
Adjustable Foldback Current LimitOvervoltage ProtectionDigital Soft-Start
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
Ordering Information
Typical Operating Circuit

19-3017; Rev 0; 10/03
Pin Configurations appear at end of data sheet.

Quick-PWM is a trademark of Maxim Integrated Products, Inc.
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VV+= VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN= +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0V, ILIM = VL,
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V+, EN/HSD, EN, HSD to GND...............................-0.3V to +30V
PGND to GND.......................................................-0.3V to +0.3V
VTT, REFIN, POK, OUT, FB, VL to GND...................-0.3V to +6V
REF, VTTR, DL, ILIM, FSEL to GND............-0.3V to (VVL + 0.3V)
LX to PGND...............................................................-2V to +30V
BST to GND............................................................-0.3V to +36V
DH to LX...................................................................-0.3V to +6V
LX to BST..................................................................-6V to +0.3V
REF Short Circuit to GND...........................................Continuous
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derated 8.3mW/°C above +70°C)........667mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)

(VV+= VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN= +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0V, ILIM = VL,
PGND = LX = GND, BST = VL, TA= 0°C to +85°C.Typical values are at TA= +25°C, unless otherwise specified.)
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)

(VV+= VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN= +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0V, ILIM = VL,
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)

(VV+= VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN= +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0V, ILIM = VL,
PGND = LX = GND, BST = VL, TA= 0°C to +85°C.Typical values are at TA= +25°C, unless otherwise specified.)
ELECTRICAL CHARACTERISTICS

(VV+ = VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN = +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND
= LX = POK = GND, BST = VL, TA= -40°C to +85°C, unless otherwise specified.) (Note 3)
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)

(VV+ = VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN = +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND
= LX = POK = GND, BST = VL, TA= -40°C to +85°C, unless otherwise specified.) (Note 3)
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)

(VV+ = VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN = +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND
= LX = POK = GND, BST = VL, TA= -40°C to +85°C, unless otherwise specified.) (Note 3)
Note 1:
Consult factory for applications that require higher than 3.5V output.
Note 2:
On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX forced to 0V, BST
forced to 5V, and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching
speeds.
Note 3:
Specifications to -40°C are guaranteed by design and are not production tested.
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
Typical Operating Characteristics

(VV+ = 12V, VOUT = 1.8V, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applicationsypical Operating Characteristics (continued)

(VV+ = 12V, VOUT = 1.8V, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applicationsypical Operating Characteristics (continued)

(VV+ = 12V, VOUT = 1.8V, circuit of Figure1, TA = +25°C, unless otherwise noted.)
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
Functional Diagrams
MAX8553/MAX8554
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ic,good price


TEL:86-533-2716050      FAX:86-533-2716790
   

©2020 IC PHOENIX CO.,LIMITED