MAX15038 Maxim Integrated Products, MAX15038 Datasheet
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MAX15038
Manufacturer Part Number
MAX15038
Description
2MHz Step-Down Regulator
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX15038.pdf
(19 pages)
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The MAX15038 high-efficiency switching regulator
delivers up to 4A load current at output voltages from
0.6V to 90% of V
making it ideal for on-board point-of-load and postregu-
lation applications. Total output error is less than ±1%
over load, line, and temperature ranges.
The MAX15038 features fixed-frequency PWM mode
operation with a switching frequency range of 500kHz
to 2MHz set by an external resistor. The MAX15038
provides the option of operating in a skip mode to
improve light-load efficiency. High-frequency operation
allows for an all-ceramic capacitor design. The high
operating frequency also allows for small-size external
components.
The low-resistance on-chip nMOS switches ensure high
efficiency at heavy loads while minimizing critical induc-
tances, making the layout a much simpler task with
respect to discrete solutions. Following a simple layout
and footprint ensures first-pass success in new designs.
The MAX15038 comes with a high bandwidth (28MHz)
voltage-error amplifier. The voltage-mode control archi-
tecture and the voltage-error amplifier permit a type III
compensation scheme to be utilized to achieve maxi-
mum loop bandwidth, up to 20% of the switching fre-
quency. High loop bandwidth provides fast transient
response, resulting in less required output capacitance
and allowing for all-ceramic-capacitor designs.
The MAX15038 provides two three-state logic inputs to
select one of nine preset output voltages. The preset
output voltages allow customers to achieve ±1% out-
put-voltage accuracy without using expensive 0.1%
resistors. In addition, the output voltage can be set to
any customer value by either using two external resis-
tors at the feedback with a 0.6V internal reference or
applying an external reference voltage to the REFIN
input. The MAX15038 offers programmable soft-start
time using one capacitor to reduce input inrush current.
Pin Configuration appears at end of data sheet.
19-4320; Rev 1; 12/09
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.
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IN
________________________________________________________________ Maxim Integrated Products
. The IC operates from 2.9V to 5.5V,
General Description
Applications
4A, 2MHz Step-Down Regulator
with Integrated Switches
o Internal 31mΩ R
o Continuous 4A Output Current Over Temperature
o ±1% Output Accuracy Over Load, Line, and
o Operates from 2.9V to 5.5V V
o Adjustable Output from 0.6V to (0.9 x V
o Soft-Start Reduces Inrush Supply Current
o 500kHz to 2MHz Adjustable Switching Frequency
o Compatible with Ceramic, Polymer, and
o Nine Preset and Adjustable Output Voltages
o Monotonic Startup for Safe-Start into Prebiased
o Selectable Forced PWM or Skip Mode for Light
o Overcurrent and Overtemperature Protection
o Output Current Sink/Source Capable with Cycle-
o Open-Drain Power-Good Output
o Lead-Free, 4mm x 4mm, 24-Pin Thin QFN Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
2.9V TO 5.5V
MAX15038ETG+
R
Temperature
Electrolytic Output Capacitors
Outputs
Load Efficiency
by-Cycle Protection
INPUT
DS(ON)
0.6V, 0.7V, 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.0V,
2.5V, and Adjustable
PART
Low-Side MOSFETs
Typical Operating Circuit
IN
EN
V
CTL2
CTL1
FREQ
REFIN
SS
MODE
DD
DS(ON)
-40°C to +85°C
TEMP RANGE
MAX15038
Ordering Information
GND
High-Side and 24mΩ
PWRGD
COMP
PGND
OUT
BST
LX
FB
IN
Supply
24 Thin QFN-EP*
PIN-PACKAGE
Features
IN
)
V
DD
OUTPUT
1.8V, 4A
1
Datasheet pdf - http://www.DataSheet4U.net/