MAX1963A Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN

19-3684; Rev 0; 5/05
Low-Input-Voltage, 300mA LDO Regulators
with RESET in SOT and TDFN
General Description
The MAX1963A/MAX1976A low-dropout linear regula-
tors 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 (MAX1963A)
or 70ms (MAX1976A) after the output voltage reaches
regulation. These devices are offered in thin SOT23 and
thin DFN packages. An internal pMOS pass transistor
allows the low supply current to remain independent of
load and dropout voltage, making these devices ideal for
portable battery-powered equipment.
Applications
Notebook/Handheld Computers
Cellular/Smart/PDA Phones
DSC, CD/MP3 Players
PCMCIA Cards
Pin Configurations
TOP VIEW
IN 1
6 OUT
MAX1963A
GND 2 _MAX1976A 5 I.C.
SHDN 3
4 RESET
THIN SOT23
8 765
MAX1963A
MAX1976A
1 234
TDFN
2mm x 2mm
6
5
4
MAX1963A
MAX1976A
1
2
3
TDFN
3mm x 3mm
Selector Guide appears at end of data sheet.
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 (MAX1963A) or 70ms (MAX1976A)
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)
♦ TDFN Package (<0.8mm High)
Ordering Information
PART*
TEMP RANGE PIN-PACKAGE
MAX1963AEZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6
MAX1963AETT_ _ _-T -40°C to +85°C 6 TDFN-6 3mm x 3mm
MAX1963AETA_ _ _-T -40°C to +85°C 8 TDFN-8 2mm x 2mm
MAX1976AEZT_ _ _-T -40°C to +85°C 6 Thin SOT23-6
MAX1976AETT_ _ _-T -40°C to +85°C 6 TDFN-6 3mm x 3mm
MAX1976AETA_ _ _-T -40°C to +85°C 8 TDFN-8 2mm x 2mm
*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.
Typical Operating Circuit
INPUT
1.62V TO 3.6V
C_IN
1µF
ON
OFF
UP TO
OUTPUT
300mA ^{0.75V TO 3.0V}
IN
OUT
MAX1963A
MAX1976A
C_OUT ^LOGIC
4.7µF ^SUPPLY
100kΩ
SHDN
RESET
TO µC
GND
________________________________________________________________ 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.