19-1301; Rev 2; 1/01
Low-Noise, Low-Dropout, 150mA Linear
Regulators with '2982 Pinout
__________________General Description
____________________________Features
The MAX8877/MAX8878 low-noise, low-dropout linear
regulators operate from a 2.5V to 6.5V input and deliver
up to 150mA. These devices are pin-compatible with
the industry-standard '2982 and offer an improved
ꢀ Pin-Compatible with the Industry-Standard '2982
ꢀ Low Output Noise: 30µV
RMS
ꢀ Low 55mV Dropout at 50mA Output
dropout voltage. Typical output noise is 30µV
, and
RMS
(165mV at 150mA output)
typical dropout is only 165mV at 150mA. The output
voltage is preset to voltages in the range of 1.5V to
5.0V, in 100mV increments.
ꢀ Low 85µA No-Load Supply Current
ꢀ Low 100µA Operating Supply Current
Designed with an internal P-channel MOSFET pass
transistor, the MAX8877/MAX8878 maintain a low
100µA supply current, independent of the load current
and dropout voltage. Other features include a 10nA
logic-controlled shutdown mode, short-circuit and ther-
mal-shutdown protection, and reverse battery protec-
tion. The MAX8878 also includes an auto-discharge
function, which actively discharges the output voltage
to ground when the device is placed in shutdown. Both
devices come in regular and thin 5-pin SOT23 pack-
ages.
(even in dropout)
ꢀ Thermal-Overload and Short-Circuit Protection
ꢀ Reverse Battery Protection
ꢀ Output Current Limit
ꢀ Preset Output Voltages ( 1.4% Accuracy)
ꢀ 10nA Logic-Controlled Shutdown
________________________Applications
_________________Ordering Information
Cellular Telephones
Cordless Telephones
PCS Telephones
PCMCIA Cards
TEMP.
RANGE
PART**
PIN-PACKAGE
MAX8877C/Dxy
MAX8877EUKxy-T
MAX8877EZKxy-T
MAX8878C/Dxy
MAX8878EUKxy-T
MAX8878EZKxy-T
0°C to +70°C Dice*
-40°C to +85°C 5 SOT23-5 Regular
-40°C to +85°C 5 SOT23-5 Thin
0°C to +70°C Dice*
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
-40°C to +85°C 5 SOT23-5 Regular
-40°C to +85°C 5 SOT23-5 Thin
*Dice are tested at T = +25°C only.
A
**xy is the output voltage code (see Expanded Ordering
Information table at end of data sheet).
____________Typical Operating Circuit
_____________________Pin Configuration
TOP VIEW
INPUT
OUTPUT
2.5V TO 6.5V
PRESET
IN
OUT
1.5V TO 5.0V
150mA
1
2
3
5
4
OUT
BP
IN
GND
C
C
OUT
3.3µF
IN
1µF
MAX8877
MAX8878
MAX8877
MAX8878
ON
SHDN
OFF
BP
SHDN
GND
C
BP
0.01µF
SOT23-5
REGULAR AND THIN
________________________________________________________________ Maxim Integrated Products
1
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or visit Maxim’s website at www.maxim-ic.com.