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MAX1927-MAX1928

Description
0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10
Categorysemiconductor    Analog mixed-signal IC   
File Size244KB,12 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

MAX1927-MAX1928 Overview

0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10

MAX1927-MAX1928 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals10
Rated input voltage3.6 V
Maximum limit input voltage5.5 V
Minimum limit input voltage2.6 V
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Processing package descriptionMICRO MAX PACKAGE-10
stateACTIVE
CraftsmanshipBICMOS
packaging shapeSQUARE
Package SizeSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mountYes
Terminal formGULL WING
Terminal spacing0.5000 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelINDUSTRIAL
control modePEAK CURRENT
Control TechnologyPULSE WIDTH MODULATION
Maximum output current0.8000 A
Analog IC other typesSWITCHING REGULATOR
Switch configurationBUCK
Maximum switching frequency1200 kHz
19-2527; Rev 0; 7/02
Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
General Description
The MAX1927/MAX1928 800mA step-down converters
power low-voltage microprocessors in compact equip-
ment requiring the highest possible efficiency. The
MAX1927/MAX1928 are optimized for generating low
output voltages (down to 750mV) at high efficiency
using small external components. The supply voltage
range is from 2.6V to 5.5V and the guaranteed minimum
output current is 800mA. 1MHz pulse-width modulation
(PWM) switching allows for small external components.
A unique control scheme minimizes ripple at light loads,
while maintaining a low 140µA quiescent current.
The MAX1927/MAX1928 include a low on-resistance
internal MOSFET switch and synchronous rectifier to
maximize efficiency and minimize external component
count. No external diode is needed. 100% duty-cycle
operation allows for a dropout voltage of only 340mV at
800mA. Other features include internal soft-start,
power-OK (POK) output, and selectable forced PWM
operation for lower noise at all load currents.
The MAX1928 is available with several preset output
voltages: 1.5V (MAX1928-15), 1.8V (MAX1928-18), and
2.5V (MAX1928-25). The MAX1927R has adjustable
output range down to 0.75V. The MAX1927/MAX1928
are available in a tiny 10-pin µMAX package.
o
800mA Output Current
o
Output Voltages from 0.75V to 5V
o
2.6V to 5.5V Input Voltage Range
o
Power-OK Output
o
No Schottky Diode Required
o
Selectable Forced PWM Operation
o
1MHz Fixed-Frequency PWM Operation
o
140µA Quiescent Current
o
Soft-Start
o
10-Pin µMAX Package
Features
MAX1927/MAX1928
Ordering Information
PART
MAX1927REUB
PRESET
TEMP
PIN-
OUTPUT
PACKAGE
RANGE
VOLTAGE
Adj. to 0.75V -40°C to +85°C 10 µMAX
1.5V
1.8V
2.5V
-40°C to +85°C 10 µMAX
-40°C to +85°C 10 µMAX
-40°C to +85°C 10 µMAX
Applications
WCDMA Handsets
PDAs and Palmtops
DSP Core Power
Battery-Powered Equipment
MAX1928EUB15
MAX1928EUB18
MAX1928EUB25
Pin Configuration
TOP VIEW
PWM
1
GND
REF
FB
COMP
2
3
4
5
10
POK
9
BATT
V
IN
2.6V TO 5.5V
Typical Operating Circuit
PWM
L1
LX
SHDN
R
C
COMP
C
C
C
f
FB
C2
V
OUT
0.75V AT 800mA
BATT
C1
MAX1927R
MAX1928
8
LX
7
PGND
6
SHDN
MAX1927R
POK
µMAX
REF
PGND
GND
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX1927-MAX1928 Related Products

MAX1927-MAX1928 MAX1927
Description 0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10
Number of functions 1 1
Number of terminals 10 10
Rated input voltage 3.6 V 3.6 V
Maximum limit input voltage 5.5 V 5.5 V
Minimum limit input voltage 2.6 V 2.6 V
Maximum operating temperature 85 Cel 85 Cel
Minimum operating temperature -40 Cel -40 Cel
Processing package description MICRO MAX PACKAGE-10 MICRO MAX PACKAGE-10
state ACTIVE ACTIVE
Craftsmanship BICMOS BICMOS
packaging shape SQUARE SQUARE
Package Size SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mount Yes Yes
Terminal form GULL WING GULL WING
Terminal spacing 0.5000 mm 0.5000 mm
terminal coating TIN LEAD TIN LEAD
Terminal location DUAL DUAL
Packaging Materials PLASTIC/EPOXY PLASTIC/EPOXY
Temperature level INDUSTRIAL INDUSTRIAL
control mode PEAK CURRENT PEAK CURRENT
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum output current 0.8000 A 0.8000 A
Analog IC other types SWITCHING REGULATOR SWITCHING REGULATOR
Switch configuration BUCK BUCK
Maximum switching frequency 1200 kHz 1200 kHz
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