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MAX1961EEP

Description
Switching Controllers 1MHz PWM Step-Down
CategoryPower/power management    The power supply circuit   
File Size313KB,29 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX1961EEP Overview

Switching Controllers 1MHz PWM Step-Down

MAX1961EEP Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
Parts packaging codeQSOP
package instructionQSOP-20
Contacts20
Reach Compliance Codenot_compliant
ECCN codeEAR99
Factory Lead Time1 week
Other featuresALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 4.95V
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage2.35 V
Nominal input voltage3.3 V
JESD-30 codeR-PDSO-G20
JESD-609 codee0
length8.65 mm
Humidity sensitivity level1
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP20,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)240
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationPHASE-SHIFT
Maximum switching frequency1120 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9 mm
Base Number Matches1
19-2740; Rev 1; 6/09
IT
TION K
VALUA
E
BLE
AVAILA
2.35V to 5.5V, 0.5% Accurate, 1MHz PWM
Step-Down Controllers with Voltage Margining
General Description
The MAX1960/MAX1961/MAX1962 high-current, high-
efficiency voltage-mode step-down DC-DC controllers
operate from a 2.35V to 5.5V input and generate output
voltages down to 0.8V at up to 20A. An on-chip charge
pump generates a regulated 5V for MOSFET drive.
Additionally, adaptive dead-time drivers allow a
wide variety of MOSFETs to be used without risking
shoot-through.
Fixed-frequency PWM operation and external synchro-
nization make these controllers suitable for telecom
and datacom applications. The operating frequency is
programmable to either 500kHz or 1MHz, or from
450kHz to 1.2MHz with an external clock. A clock output
is provided to synchronize another converter for 180°
out-of-phase operation. A high closed-loop bandwidth
provides excellent transient response for applications
with dynamic loads.
Lossless current sensing in the MAX1960 and
MAX1961 is achieved by monitoring the drain-to-source
voltage of the low-side external FET. The current limit is
scalable to accommodate a wide variety of MOSFETs
and load currents. The MAX1962 has 10% accurate
sense-resistor-based current limiting.
The MAX1960 and MAX1962 have an adjustable output
voltage from 0.8V to 4.95V. The MAX1961 and
MAX1962 have four preset output voltages (1.5V, 1.8V,
2.5V, and 3.3V) and feature 0.5% voltage accuracy
over temperature, line, and load variations. The
MAX1960 and MAX1961 also feature voltage-margining
control inputs that shift the output voltage up or down
by 4% for system testing.
Features
o
0.5% Accurate Output
o
Operates from 2.35V to 5.5V Supply
o
Generates Low Output Voltage Down to 0.8V
o
o
o
o
o
o
o
o
o
o
On-Chip Charge Pump Provides 5V Gate Drive
Ceramic or Electrolytic Capacitors
94% Efficiency
External Synchronization from 450kHz to 1.2MHz
500kHz/1MHz Fixed-Frequency PWM Operation
Fast Transient Response
Two Converters Can Operate 180° Out-of-Phase
±4% Voltage Margining for System Test
10% Accurate Current Sensing (MAX1962)
Adaptive Dead Time Prevents Shoot-Through
MAX1960/MAX1961/MAX1962
Ordering Information
PART
MAX1960EEP
MAX1961EEP
MAX1962EEP
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 QSOP
20 QSOP
20 QSOP
Typical Operating Circuit
INPUT
2.35V TO 5.5V
C+
V
CC
C-
AV
DD
MAX1960
V
DD
Applications
ASIC, FPGA, DSP, and CPU Core and I/O Voltages
Cellular Base Stations
Telecom and Network Equipment
Server and Storage Systems
VOLTAGE
MARGINING
AND ON/OFF
CTL1
BST
CTL2
COMP
DH
OUTPUT
0.8 TO 0.87
V
IN
UP TO 20A
REF
LX
DL
GND
PGND
ILIM
OPTIONAL
SYNCHRONIZATION
FSET/SYNC
Pin Configurations and Selector Guide appear at the end
of the data sheet.
CLKOUT
180° OUT-OF-PHASE
CLKOUT
FB
________________________________________________________________
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.

MAX1961EEP Related Products

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Description Switching Controllers 1MHz PWM Step-Down Switching Controllers 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining Switching Controllers 1MHz PWM Step-Down Switching Controllers 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining Switching Controllers 1MHz PWM Step-Down IC REG CTRLR BUCK 20QSOP Fixed Resistor, Thin Film, 0.25W, 2640ohm, 100V, 0.5% +/-Tol, 50ppm/Cel, Surface Mount, 1005, CHIP
Is it Rohs certified? incompatible incompatible incompatible incompatible incompatible conform to conform to
package instruction QSOP-20 QSOP-20 QSOP-20 QSOP-20 QSOP-20 SSOP, SSOP20,.25 CHIP
Reach Compliance Code not_compliant not_compliant not_compliant not_compliant not_compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
JESD-609 code e0 e0 e0 e0 e0 e3 e4
Number of terminals 20 20 20 20 20 20 2
Maximum operating temperature 85 °C 85 °C 85 °C 85 °C 85 °C 85 °C 155 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C -55 °C
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMT
surface mount YES YES YES YES YES YES YES
technology BICMOS BICMOS BICMOS BICMOS BICMOS BICMOS THIN FILM
Terminal surface Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Matte Tin (Sn) Gold (Au) - with Nickel (Ni) barrier
Is it lead-free? Contains lead Contains lead Contains lead Contains lead Contains lead Lead free -
Parts packaging code QSOP QSOP QSOP QSOP QSOP SSOP -
Contacts 20 20 20 20 20 20 -
Other features ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 4.95V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 4.95V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 4.95V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 4.95V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 4.95V - ANTI-SULFUR, FLAME PROOF, NON-INDUCTIVE
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER -
control mode VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE -
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION -
Maximum input voltage 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V -
Minimum input voltage 2.35 V 2.35 V 2.35 V 2.35 V 2.35 V 2.35 V -
Nominal input voltage 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V -
JESD-30 code R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 -
length 8.65 mm 8.65 mm 8.65 mm 8.65 mm 8.65 mm 8.65 mm -
Humidity sensitivity level 1 1 1 1 1 1 -
Number of functions 1 1 1 1 1 1 -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY -
encapsulated code SSOP SSOP SSOP SSOP SSOP SSOP -
Encapsulate equivalent code SSOP20,.25 SSOP20,.25 SSOP20,.25 SSOP20,.25 SSOP20,.25 SSOP20,.25 -
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR -
Peak Reflow Temperature (Celsius) 240 245 240 245 240 260 -
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified -
Maximum seat height 1.75 mm 1.75 mm 1.75 mm 1.75 mm 1.75 mm 1.73 mm -
Switch configuration PHASE-SHIFT PHASE-SHIFT PHASE-SHIFT PHASE-SHIFT PHASE-SHIFT PUSH-PULL -
Maximum switching frequency 1120 kHz 1120 kHz 1120 kHz 1120 kHz 1120 kHz 1120 kHz -
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL -
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING -
Terminal pitch 0.635 mm 0.635 mm 0.635 mm 0.635 mm 0.635 mm 0.635 mm -
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL -
Maximum time at peak reflow temperature 20 NOT SPECIFIED 20 NOT SPECIFIED 20 NOT SPECIFIED -
width 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm -
Base Number Matches 1 - 1 1 1 1 -
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