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MAX1572ETC075

Description
800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET
CategoryPower/power management    The power supply circuit   
File Size269KB,11 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

MAX1572ETC075 Overview

800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET

MAX1572ETC075 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeQFN
package instructionHVQCCN, LCC12,.16SQ,32
Contacts12
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage2.6 V
Nominal input voltage3.6 V
JESD-30 codeS-XQCC-N12
JESD-609 codee0
length4 mm
Humidity sensitivity level1
Number of functions1
Number of terminals12
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current2.1 A
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC12,.16SQ,32
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)245
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency2200 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formNO LEAD
Terminal pitch0.8 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width4 mm
19-2837; Rev 0; 4/03
KIT
ATION
EVALU
E
BL
AVAILA
800mA, 2MHz, PWM DC-to-DC
Step-Down Converter with
RESET
General Description
Features
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
Up to 97% Efficiency
2MHz PWM Switching
800mA Guaranteed Output Current
Low 48µA Quiescent Current
Power-Saving Modes: Pulse-Group, Pulse-Skip,
Forced-PWM Mode
0.75V to 2.5V Preset Output Range
(in 50mV Increments)
Voltage-Positioning Load Transients
5mV
P-P
Output Ripple
Tiny 2.2µH Inductor
10µF Ceramic Output Capacitor
Low 0.1µA Shutdown Current
No External Schottky Diode Required
Soft-Start with Zero Inrush Current
170ms (min)
RESET
Output
Small 12-Pin, 4mm x 4mm Thin QFN Package
MAX1572
The MAX1572 is a fixed-frequency, synchronous step-
down DC-to-DC converter to power low-voltage micro-
processor/DSP cores in portable equipment requiring
high efficiency in a limited PC board area. The features
are optimized for high efficiency over a wide load range,
small external component size, low output ripple, and
excellent transient response. The input supply voltage
range is from 2.6V to 5.5V, while the output is internally
fixed from 0.75V to 2.5V in 50mV increments with a
guaranteed output current of 800mA. The high 2MHz
switching allows tiny low-cost capacitors and a low-pro-
file inductor, while the power-saving pulse-group mode
reduces quiescent current to 48µA (typ) with light loads.
To reduce noise and RF interference, the converter can
be configured to provide forced-PWM operation.
The MAX1572 includes a low on-resistance internal
MOSFET switch and synchronous rectifier to maximize
efficiency and minimize external component count. No
external diode is needed. Other features include soft-
start to eliminate inrush current at startup and a 170ms
(min)
RESET
output to provide power-on/undervoltage
reset. The MAX1572 is available in a 12-pin, 4mm x
4mm thin QFN package with exposed paddle.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1572ETC075
-40°C to +85°C
12 Thin QFN-EP**
MAX1572ETC130
-40°C to +85°C
12 Thin QFN-EP**
MAX1572ETC150
-40°C to +85°C
12 Thin QFN-EP**
MAX1572ETC180
-40°C to +85°C
12 Thin QFN-EP**
MAX1572ETC250
-40°C to +85°C
12 Thin QFN-EP**
MAX1572ETCxyz*
-40°C to +85°C
12 Thin QFN-EP**
*xyz
is for the output voltage (e.g., MAX1572ETC165 has a
1.65V output). Minimum order quantity is 2500.
**EP
= Exposed paddle.
Applications
Cell Phones and Smart Phones
PDAs, Palmtops, and Notebook Computers
MP3 and DVD Players
Digital Cameras and Camcorders
PCMCIA Cards
Hand-Held Instruments
Selector Guide appears at end of data sheet.
Typical Operating Circuit
INPUT
2.6V TO 5.5V
BATT
LX
2.2µH
OUTPUT
0.75V TO 2.5V
800mA
Pin Configuration
LX
8
TOP VIEW
9
EN1
10
11
12
1
RESET
PGND
7
6
EN2
GND
MAX1572
ABATT
PGND
GND
BATT
MAX1572
5
4
ABATT
MODE
SELECT
EN1
EN2
SS
GND
OUT
RESET
OUT
2
SS
3
GND
4mm x 4mm
THIN QFN
________________________________________________________________
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.

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