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MAX1935 Fiches technique(PDF) 1 Page - Maxim Integrated Products

No de pièce MAX1935
Description  500mA, Low-Voltage Linear Regulator in Tiny QFN
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1935 Fiches technique(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX1935 low-dropout linear regulator operates
from a 2.25V to 5.5V supply and delivers a guaranteed
500mA load current with low 175mV dropout. The high-
accuracy (±1.5%) output voltage is preset at an inter-
nally trimmed voltage or can be adjusted from 0.8V to
4.5V with an external resistive-divider.
An internal PMOS pass transistor allows low 210µA
supply current, making this device ideal for portable
equipment such as personal digital assistants (PDAs),
cellular phones, cordless phones, and other equip-
ment, including base stations and docking stations.
Other features include an active-low, power-OK output
that indicates when the output is out of regulation, a
0.02µA shutdown mode, short-circuit protection, and
thermal-shutdown protection. The MAX1935 comes in a
tiny 1.9W, 8-pin 3mm x 3mm thin QFN package.
Applications
Notebook Computers
Cellular and Cordless Telephones
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
o Guaranteed 500mA Output Current
o Output Down to 0.8V
o Low 175mV Dropout at 500mA
o ±1.5% Output Voltage Accuracy
Preset at 1.5V
Adjustable from 0.8V to 4.5V
o Power-OK Output
o Low 210µA Ground Current
o 0.02µA Shutdown Current
o Thermal-Overload Protection
o Output Current Limit
o Tiny 1.9W, 8-Pin 3mm x 3mm Thin QFN Package
500mA, Low-Voltage Linear Regulator
in Tiny QFN
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
8
7
6
5
OUT
OUT
SET
GND
SHDN
POK
IN
IN
MAX1935
THIN QFN
3mm x 3mm
TOP VIEW
Pin Configuration
Ordering Information
OUT
SET
GND
IN
SHDN
POK
COUT
10
µF
VOUT
0.8V TO 4.5V
CIN
1
µF
ON
OFF
R2
MAX1935
R1
TO
µC
RPOK
100k
VIN
2.25V TO 5.5V
Typical Operating Circuit
19-2599; Rev 0; 10/02
PART
TEMP RANGE
PIN-PACKAGE
MAX1935ETA*
-40
°C to +85°C
8 Thin QFN
3mm x 3mm
MAX1935ETA15*
-40
°C to +85°C
8 Thin QFN
3mm x 3mm
Selector Guide
PART
OUTPUT
VOLTAGE
TOP MARK
MAX1935ETA
Adjustable
ADB
MAX1935ETA15
1.5V
ADB
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
*Contact factory for preset output voltages.


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