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PDF MAX1659 Data sheet ( Hoja de datos )
| Número de pieza | MAX1659 | |
| Descripción | Low-Dropout Linear Regulators | |
| Fabricantes | Maxim Integrated | |
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19-1263; Rev 0; 7/97
350mA, 16.5V Input,
Low-Dropout Linear Regulators
_______________General Description
The MAX1658/MAX1659 linear regulators maximize bat-
tery life by combining ultra-low supply currents and low
dropout voltages. They feature Dual Mode™ operation,
which presets the output to 3.3V (MAX1658) or 5V
(MAX1659), or permits it to be adjusted between 1.25V
and 16V. The regulator supplies up to 350mA, with a
typical dropout of 650mV for the MAX1658 and 490mV
for the MAX1659. With their P-channel MOSFET pass
transistor, these devices maintain a low quiescent cur-
rent from zero output current to the full 350mA, even in
dropout. They support input voltages ranging from 2.7V
to 16.5V.
The MAX1658/MAX1659 feature a 1µA shutdown mode,
reverse battery protection, short-circuit protection, and
thermal shutdown. They are available in a special high-
power (1.2W), 8-pin SO package designed specifically
for compact applications.
________________________Applications
Digital Cordless Phones
PCS Phones
Cellular Phones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
__________Typical Operating Circuit
____________________________Features
o Wide Input Voltage Range: 2.7V to 16.5V
o Low, 490mV Dropout at 350mA Output Current
(MAX1659)
o 30µA Supply Current
o 1µA Max Shutdown Current
o High-Power (1.2W) 8-Pin SO Package
o Dual Mode Operation Output:
Fixed 3.3V (MAX1658)
Fixed 5.0V (MAX1659)
or Adjustable (1.25V to 16V)
o Thermal Overload Protection
o Current-Limit Protection
o Reverse Battery Protection
______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX1658C/D
0°C to +70°C
Dice*
MAX1658ESA -40°C to +85°C
8 SO
MAX1659C/D
0°C to +70°C
Dice*
MAX1659ESA -40°C to +85°C
8 SO
*Dice are tested at TA = +25°C, DC parameters only.
__________________Pin Configuration
INPUT
UP TO 16.5V
ON
OFF
OUTPUT
3.3V OR 5V,
OR ADJ. (DOWN TO 1.25V);
UP TO 350mA
IN OUT
MAX1658
MAX1659
SHDN
GND SET
TOP VIEW
SET 1
SHDN 2
IN 3
OUT 4
MAX1658
MAX1659
8 GND
7 IN
6 IN
5 OUT
SO
Dual Mode is a trademark of Maxim Integrated Products.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
http://www.Datasheet4U.com
1 page  
350mA, 16.5V Input,
Low-Dropout Linear Regulators
____________________________Typical Operating Characteristics (continued)
(VIN = 5V (MAX1658), VIN = 6V (MAX1659); SHDN = IN; SET = GND; CIN = 0.1µF; COUT = 10µF tantalum; TA = +25°C; unless
otherwise noted.)
MAX1658 OVERSHOOT AND
TIME EXITING SHUTDOWN
MAX1658/59TOC14
MAX1659 OVERSHOOT AND
TIME EXITING SHUTDOWN
MAX1658/59TOC15
3.3V
5V
A
0V A
0V
B
100µs/div
A: OUTPUT VOLTAGE (1V/div)
B: SHDN PIN VOLTAGE (2V/div)
OUTPUT NOISE
B
100µs/div
A: OUTPUT VOLTAGE (2V/div)
B: SHDN PIN VOLTAGE (2V/div)
OUTPUT NOISE DENSITY
vs. FREQUENCY
104
103
10ms/div
10Hz TO 100kHz NOISE, VOUT = 5V (1mV/div), IOUT = 165mA
102
10
10
VOUT = 5V
IOUT = 165mA
FREQUENCY (Hz)
50k
______________________________________________________________Pin Description
PIN NAME
1 SET
2
3, 6, 7
SHDN
IN
4, 5 OUT
8 GND
FUNCTION
Output Voltage Input. Connecting SET to ground selects the factory-preset 3.3V (MAX1658) or 5V
(MAX1659) output voltage. For an adjustable output voltage, connect SET to a resistive voltage divider from
OUT to GND.
Shutdown Input. When SHDN is low, the device turns off and typically draws 0.1µA of supply current.
Unregulated Input Supply Voltage, 2.7V to 16.5V input range. The IN pins also serve as heatsinks. Connect
to a copper plane to achieve maximum thermal dissipation.
Regulated Output Voltage. Fixed or adjustable from 1.25V to 16V. Sources up to 350mA. For stable opera-
tion, bypass with a 10µF, low-ESR (<0.2Ω) capacitor from OUT to GND. For improved load-transient
response, use a larger low-ESR capacitor.
Ground
_______________________________________________________________________________________ 5
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350mA, 16.5V Input,
Low-Dropout Linear Regulators
NOTES
______________________________________________________________________________________ 11
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX1659.PDF ] | |
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