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MAX1700 Fiches technique(PDF) 1 Page - Maxim Integrated Products

No de pièce MAX1700
Description  1-Cell to 3-Cell, High-Power 1A, Low-Noise, Step-Up DC-DC Converters
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1700 Fiches technique(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX1700/MAX1701 are high-efficiency, low-noise,
step-up DC-DC converters intended for use in battery-
powered wireless applications. They use a synchro-
nous-rectified pulse-width-modulation (PWM) boost
topology to generate 2.5V to 5.5V outputs from battery
inputs such as one to three NiCd/NiMH cells or one Li-
Ion cell. Both devices have an internal 1A, 130m
Ω N-
channel MOSFET switch and a 250m
Ω P-channel
synchronous rectifier.
With their internal synchronous rectifier, the MAX1700/
MAX1701 deliver 5% better efficiency than similar non-
synchronous converters. They also feature a pulse-
frequency-modulation (PFM) standby mode to improve
efficiency at light loads, and a 3µA shutdown mode.
The MAX1700/MAX1701 come in 16-pin QSOP pack-
ages (which occupy the same space as an 8-pin SO).
The MAX1701 includes two comparators to generate
power-good and low-battery warning outputs. It also
contains a gain block that can be used to build a linear
regulator using an external P-channel pass device.
For higher-power outputs, refer to the MAX1703. For
dual outputs (step-up and linear regulator), refer to the
MAX1705/MAX1706. For an on-board analog-to-digital
converter, refer to the MAX848/MAX849.
The MAX1701 evaluation kit is available to speed design
time.
Applications
Digital Cordless Phones
Personal Communicators
PCS Phones
Palmtop Computers
Wireless Handsets
Hand-Held Instruments
Two-Way Pagers
Features
o Up to 96% Efficiency
o 1.1 VIN Guaranteed Start-Up
o 0.7V to 5.5V Input Range
o Up to 800mA Output
o Step-Up Output (adjustable from 2.5V to 5.5V)
o PWM/PFM Synchronous-Rectified Topology
o External Clock or Internal 300kHz Oscillator
o 3µA Logic-Controlled Shutdown
o Power-Good Output (MAX1701)
o Low-Battery Comparator (MAX1701)
o Uncommitted Gain Block (MAX1701)
1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
________________________________________________________________
Maxim Integrated Products
1
PGND
GND
FB
ONA
REF
ONB
POUT
LX
OUT
ON
INPUT
0.7V TO 5.5V
OR
OFF
OFF
ON
SYNC
PWM
PFM
OUTPUT
3.3V OR ADJ
UP TO 800mA
CLK/SEL
MAX1700
Pin Configurations
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
I.C.
I.C.
POUT
OUT
LX
PGND
FB
I.C.
I.C.
I.C. = INTERNAL CONNECTION. LEAVE OPEN OR CONNECT TO GND
MAX1700
QSOP
I.C.
REF
I.C.
CLK/SEL
GND
ONB
ONA
Typical Operating Circuit
19-4759; Rev 1; 1/99
PART
MAX1700EEE
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
16 QSOP
EVALUATION
KIT MANUAL
FOLLOWS
DATA
SHEET
Ordering Information
MAX1701EEE
-40°C to +85°C
16 QSOP
Pin Configurations continued at end of data sheet.
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.


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