MAX8655ETN+T Maxim Integrated Products, MAX8655ETN+T Datasheet
MAX8655ETN+T
Manufacturer Part Number
MAX8655ETN+T
Description
IC STEP-DN REG 25A 56-TQFN-EP
Manufacturer
Maxim Integrated Products
Type
Step-Down (Buck)r
Datasheet
1.MAX8655ETNT.pdf
(23 pages)
Specifications of MAX8655ETN+T
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
0.7 ~ 5.5 V
Current - Output
25A
Frequency - Switching
200kHz ~ 1MHz
Voltage - Input
4.5 ~ 25 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
56-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX8655 synchronous-PWM buck regulator oper-
ates from a 4.5V to 25V input and generates an output
voltage adjustable from 0.7V to 5.5V at loads up to 25A.
Integrated power MOSFETs provide a small footprint,
ease of layout, and reduced EMI. Removing the board
trace inductances ensures the highest efficiency at
high frequency.
The MAX8655 uses peak current-mode control architec-
ture with an adjustable (200kHz to 1MHz), constant-
switching frequency, which is externally synchronizable.
The MAX8655’s adjustable current limit uses the induc-
tor’s DC resistance to improve efficiency or an external
sense resistor for higher accuracy. Foldback type cur-
rent limit is available to reduce the power dissipation
under severe-overload or short-circuit conditions. A ref-
erence input is provided for use with a high-accuracy
external reference or for DDR and tracking applications.
Monotonic startup provides safe starting into a prebi-
ased output, where traditional step-down regulators
discharge the output capacitor during soft-start, creat-
ing a negative voltage at the output and possibly dam-
aging the load.
A 180° out-of-phase synchronization output is available
for synchronizing with another MAX8655.
An enable input is provided for on/off control and to
facilitate output sequencing. Output-voltage sensing for
programmable overvoltage protection is provided and
is independent of the feedback network to further
enhance the output overvoltage protection.
Overall, the MAX8655 provides enough flexibility for the
experienced user, as well as simplicity and ease of use
for non-power-supply engineers.
19-3982; Rev 2; 10/10
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
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.
MAX8655ETN+
PART
Point-of-Load Power Supplies
Telecom Power
Networking
Nonisolated DC-DC Power Modules
Servers and Workstations
Notebook Computers
IBA Power Supplies
________________________________________________________________ Maxim Integrated Products
-40°C to +85°C
Internal MOSFET, Step-Down Regulator
RANGE
Ordering Information
TEMP
General Description
Highly Integrated, 25A, Wide-Input,
Applications
PIN-PACKAGE
56 TQFN - E P *
( 8mm x 8m m )
o 25A Output Current
o Integrated Power MOSFETs
o Operates from 4.5V to 25V Supply
o 1% FB Voltage Accuracy Over Temperature
o Adjustable Output Voltage Down to 0.7V
o Adjustable Switching Frequency and External
o 180° Phase-Shifted Synchronization
o Adjustable Overcurrent Limit
o Adjustable Slope Compensation
o Selectable Current-Limit Mode: Latch-Off or
o Monotonic Output Voltage Rise at Startup into
o Output Sources and Sinks Current for DDR
o Enable Input
o Power-OK (POK) Output
o Adjustable Soft-Start
o Independently Adjustable Overvoltage Protection
Pin Configuration appears at end of data sheet.
SYNC OUTPUT
ENABLE INPUT
FSYNC INPUT
Synchronization from 200kHz to 1MHz
Automatic Recovery
Prebias Output
Applications
POWER-OK OUTPUT
VL
INPUT 7V
TO 28V
OFF
ON
POK
FSYNC
SYNCO
EN
BST
LXB
PVIN
AVL
Typical Operating Circuit
MAX8655
VLGND
CS+
CS-
VL
LX
IN
PVIN
Features
0.7V TO 5.5V
UP TO 25A
OUTPUT
1
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