Rainbow Electronics MAX1976 - Manual

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
♦ ±1.5% 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)
MAX1963/MAX1976
Low-Input-Voltage, 300mA LDO Regulators
with
RESET
in SOT and TDFN
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3040; Rev 0; 10/03
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.
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
TOP VIEW
TDFN
3mm x 3mm
I.C.
OUT
RESET GND
IN
SHDN
1
2
3
6
5
4
MAX1963
MAX1976
GND
RESET SHDN
1 6 OUT IN
MAX1963
MAX1976
THIN SOT23
2
3 4
I.C. 5
Pin Configurations
*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.
Selector Guide appears at end of data sheet.
MAX1963
MAX1976
INPUT
1.62V TO 3.6V
C
OUT
4.7 µF
ON
OFF
IN
C IN
1 µF
300mA
SHDN
GND
OUTPUT
0.75V TO 3.0V
LOGIC
SUPPLY
100k Ω
TO µC
OUT
RESET
Typical Operating Circuit