MAX618 Maxim, MAX618 Datasheet
MAX618
Manufacturer Part Number
MAX618
Description
28V / PWM / Step-Up DC-DC Converter
Manufacturer
Maxim
Datasheet
1.MAX618.pdf
(14 pages)
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The MAX618 CMOS, PWM, step-up DC-DC converter
generates output voltages up to 28V and accepts
inputs from +3V to +28V. An internal 2A, 0.3Ω switch
eliminates the need for external power MOSFETs while
supplying output currents up to 500mA or more. A
PWM control scheme combined with Idle Mode™ oper-
ation at light loads minimizes noise and ripple while
maximizing efficiency over a wide load range. No-load
operating current is 500µA, which allows efficiency up
to 93%.
A fast 250kHz switching frequency allows the use of
small surface-mount inductors and capacitors. A shut-
down mode extends battery life when the device is not
in use. Adaptive slope compensation allows the
MAX618 to accommodate a wide range of input and
output voltages with a simple, single compensation
capacitor.
The MAX618 is available in a thermally enhanced 16-
pin QSOP package that is the same size as an industry-
standard 8-pin SO but dissipates up to 1W. An
evaluation kit (MAX618EVKIT) is available to help
speed designs.
19-1462; Rev 0; 6/99
Idle Mode is a trademark of Maxim Integrated Products.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
TOP VIEW
Automotive-Powered DC-DC Converters
Industrial +24V and +28V Systems
LCD Displays
Palmtop Computers
COMP
SHDN
GND
GND
LX
LX
LX
FB
________________________________________________________________ Maxim Integrated Products
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General Description
MAX618
QSOP
Pin Configuration
28V, PWM, Step-Up DC-DC Converter
Applications
16
15
14
13
12
11
10
9
GND
PGND
PGND
PGND
GND
VL
IN
GND
MAX618EEE
3V TO 28V
Adjustable Output Voltage Up to +28V
Up to 93% Efficiency
Wide Input Voltage Range (+3V to +28V)
Up to 500mA Output Current at +12V
500µA Quiescent Supply Current
3µA Shutdown Current
250kHz Switching Frequency
Small 1W 16-Pin QSOP Package
PART
V
IN
Typical Operating Circuit
IN
SHDN
VL
COMP
TEMP. RANGE
-40°C to +85°C
MAX618
Ordering Information
PGND
GND
LX
FB
16 QSOP
PIN-PACKAGE
Features
V
UP TO 28V
OUT
1
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