MAX1963_07 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN

19-3040; Rev 2; 5/07
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.
Applications
Notebook Computers
Cellular and PCS Telephones
Personal Digital Assistants (PDAs)
Hand-Held Computers
Digital Cameras
PCMCIA Cards
CD and MP3 Players
Features
♦ Low 1.62V Minimum Input Voltage
♦ Guaranteed 300mA Output Current
♦ ±2.5% Accuracy Over Load/Line/Temp
♦ Low 100mV Dropout at 300mA Load
♦ 2.2ms (MAX1963) or 70ms (MAX1976)
RESET Output Flag
♦ Supply Current Independent of Load and
Dropout Voltage
♦ Logic-Controlled Shutdown
♦ Thermal-Overload and Short-Circuit Protection
♦ Preset Output Voltages (0.75V to 3.0V)
♦ Tiny 6-Pin Thin SOT23 Package (<1.1mm High)
♦ Thin 6-Pin TDFN Package (<0.8mm High)
Ordering Information
PART*
TEMP RANGE
PIN-PACKAGE
PKG
CODE
MAX1963EZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6 Z6-1
MAX1963ETT_ _ _-T -40°C to +85°C 6 TDFN
T633-2
MAX1976EZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6 Z6-1
MAX1976ETT_ _ _-T -40°C to +85°C 6 TDFN
T633-2
*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.
Pin Configurations
Typical Operating Circuit
TOP VIEW
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
INPUT
1.62V TO 3.6V
C_IN
1μF
ON
OFF
OUTPUT
300mA ^{0.75V TO 3.0V}
IN
OUT
MAX1963
MAX1976
C_OUT ^LOGIC
4.7μF ^SUPPLY
100kΩ
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 Maxim’s website at www.maxim-ic.com.