MAX618EEE 查看數據表（PDF） - Maxim Integrated
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MAX618EEE Datasheet PDF : 15 Pages
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MAX618
EVALUATION KIT AVAILABLE
28V Internal Switch, Step-Up DC-DC Converter
General Description
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™ operation at light
loads minimizes noise and ripple while maximizing effi-
ciency 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.
Applications
●● Industrial +24V and +28V Systems
●● LCD Displays
●● Palmtop Computers
Pin Configuration
TOP VIEW
+
GND 1
LX 2
LX 3
LX 4
MAX618
SHDN 5
COMP 6
FB 7
GND 8
QSOP
16 GND
15 PGND
14 PGND
13 PGND
12 GND
11 VL
10 IN
9 GND
Features
●● 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
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX618EEE+
-40°C to +85°C
16 QSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Application Circuit
VIN
3V TO
28V
IN
LX
MAX618
SHDN
PGND
VL
FB
COMP
GND
VOUT
UP TO
28V
Idle Mode is a trademark of Maxim Integrated Products, Inc.
19-1462; Rev 2; 4/15
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