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MAX1963 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Input-Voltage, 300mA LDO Regulators with RESETin SOT and TDFN | |||
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19-3040; Rev 0; 10/03
Low-Input-Voltage, 300mA LDO Regulators
with RESET in SOT and TDFN
General Description
The MAX1963/MAX1976 low-dropout linear regulators
operate from a +1.62V to +3.6V supply and deliver a
guaranteed 300mA continuous load current with a low
100mV dropout. The high-accuracy (±0.5%) output
voltage is preset to an internally trimmed voltage in the
+0.75V to +3.0V range. An active-low, open-drain reset
output remains asserted for at least 2.2ms (MAX1963)
or 70ms (MAX1976) after the output voltage reaches
regulation. These devices are offered in 6-pin thin
SOT23 and 6-pin 3mm x 3mm thin DFN packages.
An internal PMOS pass transistor allows the low supply
current to remain independent of load and dropout volt-
age, making these devices ideal for portable battery-pow-
ered equipment such as personal digital assistants
(PDAs), cell phones, cordless phones, and notebook com-
puters. Other features include logic-controlled shutdown,
short-circuit protection, and thermal-overload protection.
Features
o Low 1.62V Minimum Input Voltage
o Guaranteed 300mA Output Current
o ±1.5% Accuracy Over Load/Line/Temp
o Low 100mV Dropout at 300mA Load
o 2.2ms (MAX1963) or 70ms (MAX1976)
RESET Output Flag
o Supply Current Independent of Load and
Dropout Voltage
o Logic-Controlled Shutdown
o Thermal-Overload and Short-Circuit Protection
o Preset Output Voltages (0.75V to 3.0V)
o Tiny 6-Pin Thin SOT23 Package (<1.1mm High)
o Thin 6-Pin TDFN Package (<0.8mm High)
Applications
Notebook Computers
Cellular and PCS Telephones
Personal Digital Assistants (PDAs)
Hand-Held Computers
Digital Cameras
PCMCIA Cards
CD and MP3 Players
Ordering Information
PART*
TEMP RANGE PIN-PACKAGE
MAX1963EZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6
MAX1963ETT_ _ _-T -40°C to +85°C 6 TDFN
MAX1976EZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6
MAX1976ETT_ _ _-T -40°C to +85°C 6 TDFN
*Insert the desired three-digit suffix (see the Selector Guide) into
the blanks to complete the part number. Contact the factory for
other output voltages.
TOP VIEW
Pin Configurations
IN 1
6 OUT OUT 1
6 IN
GND 2
MAX1963
MAX1976
5 I.C.
I.C. 2
MAX1963
MAX1976
5 SHDN
SHDN 3
RESET 3
4 RESET
4 GND
THIN SOT23
TDFN
3mm x 3mm
Typical Operating Circuit
INPUT
1.62V TO 3.6V
CIN
1µF
ON
OFF
OUTPUT
300mA 0.75V TO 3.0V
IN
OUT
MAX1963
MAX1976
COUT LOGIC
4.7µF SUPPLY
100kâ¦
SHDN
RESET
TO µC
GND
Selector Guide appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maximâs website at www.maxim-ic.com.
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