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MAX1901-MAX1904

Description
0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32
Categorysemiconductor    Analog mixed-signal IC   
File Size530KB,33 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

MAX1901-MAX1904 Overview

0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32

MAX1901-MAX1904 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals32
Rated input voltage15 V
Maximum limit input voltage30 V
Minimum limit input voltage4.2 V
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Processing package description5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
stateACTIVE
CraftsmanshipBICMOS
packaging shapeSQUARE
Package SizeChip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mountYes
Terminal formNO
Terminal spacing0.5000 mm
terminal coatingtin lead
Terminal locationFour
Packaging MaterialsUNSPECIFIED
Temperature levelINDUSTRIAL
control modePEAK current
Control TechnologyPulse width MODULATION
Maximum output current0.2000 A
Analog IC other typesDual switch controller
Switch configurationpush-pull
Maximum switching frequency550 kHz
19-2224; Rev 3; 12/03
500kHz Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
General Description
The MAX1901/MAX1902/MAX1904 are buck-topology,
step-down, switch-mode, power-supply controllers that
generate logic-supply voltages in battery-powered sys-
tems. These high-performance, dual/triple-output devices
include on-board power-up sequencing, power-good sig-
naling with delay, digital soft-start, secondary winding
control, low dropout circuitry, internal frequency-compen-
sation networks, and automatic bootstrapping.
Up to 97% efficiency is achieved through synchronous
rectification and Maxim’s proprietary Idle Mode™ control
scheme. Efficiency is greater than 80% over a 1000:1
load-current range, which extends battery life in system
suspend or standby mode. Excellent dynamic response
corrects output load transients within five clock cycles.
Strong 1A on-board gate drivers ensure fast external N-
channel MOSFET switching.
These devices feature a logic-controlled and synchroniz-
able, fixed-frequency, pulse-width modulation (PWM)
operating mode. This reduces noise and RF interference
in sensitive mobile communications and pen-entry appli-
cations. Asserting the
SKIP
pin enables fixed-frequency
mode, for lowest noise under all load conditions.
The MAX1901/MAX1902/MAX1904 include two PWM reg-
ulators, adjustable from 2.5V to 5.5V with fixed 5.0V and
3.3V modes. All these devices include secondary feed-
back regulation, and the MAX1902 contains a 12V/120mA
linear regulator. The MAX1901/MAX1904 include a sec-
ondary feedback input (SECFB), plus a control pin
(STEER) that selects which PWM (3.3V or 5V) receives the
secondary feedback signal. SECFB provides a method
for adjusting the secondary winding voltage regulation
point with an external resistor divider, and is intended to
aid in creating auxiliary voltages other than fixed 12V.
The MAX1901/MAX1902 contain internal output overvolt-
age and undervoltage protection features.
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
Features
97% Efficiency
4.2V to 30V Input Range
2.5V to 5.5V Dual Adjustable Outputs
Selectable 3.3V and 5V Fixed or Adjustable
Outputs (Dual Mode™)
12V Linear Regulator
Adjustable Secondary Feedback
(MAX1901/MAX1904)
5V/50mA Linear Regulator Output
Precision 2.5V Reference Output
Programmable Power-Up Sequencing
Power-Good (RESET) Output
Output Overvoltage Protection
(MAX1901/MAX1902)
Output Undervoltage Shutdown
(MAX1901/MAX1902)
333kHz/500kHz Low-Noise, Fixed-Frequency
Operation
Low-Dropout, 98% Duty-Factor Operation
2.5mW Typical Quiescent Power (12V input, both
SMPSs on)
4µA Typical Shutdown Current
MAX1901/MAX1902/MAX1904
Ordering Information
PART
MAX1901EAI
MAX1901ETJ
MAX1902EAI
MAX1902ETJ
MAX1904EAI
MAX1904ETJ
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 SSOP
32 Thin QFN 5mm x 5mm
28 SSOP
32 Thin QFN 5mm x 5mm
28 SSOP
32 Thin QFN 5mm x 5mm
________________________Applications
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
Desktop CPU Local DC-DC Converters
3.3V
INPUT
5V (RTC)
Functional Diagram
12V
5V
LINEAR
12V
LINEAR
3.3V
SMPS
5V
SMPS
5V
Idle Mode is a trademark of Maxim Integrated Products, Inc.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
ON/OFF
POWER-UP
SEQUENCE
POWER-
GOOD
RESET
________________________________________________________________
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.

MAX1901-MAX1904 Related Products

MAX1901-MAX1904 MAX1902 MAX1904 MAX1901 MAX1902ETJ
Description 0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32 0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32 0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32 0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32 0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32
Number of functions 1 1 1 1 1
Number of terminals 32 32 32 32 32
Maximum operating temperature 85 Cel 85 Cel 85 Cel 85 Cel 85 °C
Minimum operating temperature -40 Cel -40 Cel -40 Cel -40 Cel -40 °C
surface mount Yes Yes Yes Yes YES
Terminal form NO NO NO NO NO LEAD
Terminal location Four Four Four Four QUAD
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL
control mode PEAK current PEAK current PEAK current PEAK current CURRENT-MODE
Control Technology Pulse width MODULATION Pulse width MODULATION Pulse width MODULATION Pulse width MODULATION PULSE WIDTH MODULATION
Maximum output current 0.2000 A 0.2000 A 0.2000 A 0.2000 A 0.2 A
Switch configuration push-pull push-pull push-pull push-pull PUSH-PULL
Maximum switching frequency 550 kHz 550 kHz 550 kHz 550 kHz 550 kHz
Rated input voltage 15 V 15 V 15 V 15 V -
Maximum limit input voltage 30 V 30 V 30 V 30 V -
Minimum limit input voltage 4.2 V 4.2 V 4.2 V 4.2 V -
Processing package description 5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32 5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32 5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32 5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32 -
state ACTIVE ACTIVE ACTIVE ACTIVE -
Craftsmanship BICMOS BICMOS BICMOS BICMOS -
packaging shape SQUARE SQUARE SQUARE SQUARE -
Package Size Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE -
Terminal spacing 0.5000 mm 0.5000 mm 0.5000 mm 0.5000 mm -
terminal coating tin lead tin lead tin lead tin lead -
Packaging Materials UNSPECIFIED UNSPECIFIED UNSPECIFIED UNSPECIFIED -
Analog IC other types Dual switch controller Dual switch controller Dual switch controller Dual switch controller -
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