MAX8865T Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Dual, Low-Dropout, 100mA Linear Regulators

19-0485; Rev 0; 4/96
Dual, Low-Dropout, 100mA Linear Regulators
_______________General Description
The MAX8865 and MAX8866 dual, low-dropout linear
regulators operate from a +2.5V to +5.5V input range
and deliver up to 100mA. At 200mA total load, the
PMOS pass transistors keep the supply current at
145µA, making these devices ideal for battery-operated
portable equipment such as cellular phones, cordless
phones, and modems.
The devices feature Dual Mode™ operation: their out-
put voltages are preset (at 3.15V for the “T” versions,
2.84V for the “S” versions, or 2.80V for the “R” versions)
or can be adjusted with external resistor dividers. Other
features include independent low-power shutdown,
short-circuit protection, thermal shutdown protection,
and reverse battery protection. The MAX8866 also
includes an auto-discharge function, which actively dis-
charges the selected output voltage to ground when
the device is placed in shutdown mode. Both devices
come in a miniature 8-pin µMAX package.
____________________________Features
o Low Cost
o Low, 55mV Dropout Voltage @ 50mA I_OUT
o Low, 105µA No-Load Supply Current
o Low, 145µA Operating Supply Current (even in
dropout)
o Low, 350µV_RMS Output Noise
o Independent, Low-Current Shutdown Control
o Thermal Overload Protection
o Output Current Limit
o Reverse Battery Protection
o Dual Mode Operation: Fixed or Adjustable (1.25V
to 5.5V) Outputs
________________________Applications
Cordless Telephones
Modems
PCS Telephones
Hand-Held Instruments
Cellular Telephones
Palmtop Computers
PCMCIA Cards
Electronic Planners
______________Ordering Information
PART
MAX8865TEUA
MAX8865SEUA
MAX8865REUA
MAX8866TEUA
MAX8866SEUA
MAX8866REUA
TEMP. RANGE
PIN-
PACKAGE
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 µMAX
PRESET
V_OUT (V)
3.15
2.84
2.80
3.15
2.84
2.80
__________Typical Operating Circuit
C_IN
2µF
BATTERY
SHDN2
OUT1
IN
OUT2
MAX8865
MAX8866
SHDN1
SHDN2
GND SET1 SET2
C_OUT1
1µF
OUTPUT
VOLTAGE 1
OUTPUT
VOLTAGE 2
C_OUT2
1µF
__________________Pin Configuration
TOP VIEW
OUT1 1
IN ²
GND 3
OUT2 4
MAX8865
MAX8866
µMAX
8 SET1
7 SHDN1
6 SHDN2
5 SET2
Dual Mode is a trademark of Maxim Integrated Products.
________________________________________________________________ Maxim Integrated Products 1
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