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MAX1790 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX1790
Description  Low-Noise Step-Up DC-DC Converter
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1790 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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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.
General Description
The MAX1790 boost converter incorporates high-perfor-
mance (at 1.2MHz), current-mode, fixed-frequency, pulse-
width modulation (PWM) circuitry with a built-in 0.21
N-channel MOSFET to provide a highly efficient regulator
with fast response.
High switching frequency (640kHz or 1.2MHz selectable)
allows easy filtering and faster loop performance. An
external compensation pin provides the user flexibility in
determining loop dynamics, allowing the use of small, low
equivalent series resistance (ESR) ceramic output capaci-
tors. The device can produce an output voltage as high as
12V from an input as low as 2.6V.
Soft-start is programmed with an external capacitor, which
sets the input current ramp rate. In shutdown mode, cur-
rent consumption is reduced to 0.1µA. The MAX1790 is
available in a space-saving 8-pin µMAX package. The
ultra-small package and high switching frequency allow
the total solution to be less than 1.1mm high.
Applications
LCD Displays
PCMCIA Cards
Portable Applications
Hand-Held Devices
Features
o 90% Efficiency
o Adjustable Output from VIN to 12V
o 1.6A, 0.21Ω, 14V Power MOSFET
o +2.6V to +5.5V Input Range
o Pin-Selectable 640kHz or 1.2MHz Switching
Frequency
o 0.1µA Shutdown Current
o Programmable Soft-Start
o Small 8-Pin µMAX Package
Low-Noise Step-Up DC-DC Converter
________________________________________________________________ Maxim Integrated Products
1
IN
LX
GND
1
2
8
7
SS
FREQ
FB
COMP
µMAX
TOP VIEW
3
4
6
5
MAX1790
SHDN
LX
IN
VIN
2.6V TO 5V
GND
FREQ
VOUT
COMP
SHDN
FB
MAX1790
ON/OFF
SS
Typical Operating Circuit
19-1563; Rev 0; 1/00
PART
MAX1790EUA
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
8 µMAX
EVALUATION
KIT MANUAL
FOLLOWS
DATA
SHEET
Pin Configuration
Ordering Information


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