19-1301; Rev 1; 3/98
Lo w -No is e , Lo w -Dro p o u t , 1 5 0 m A Lin e a r
Re g u la t o rs w it h ‘2 9 8 2 P in o u t
/MAX78
__________________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
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 ind us try-s ta nd a rd ‘2982 a nd offe r a n imp rove d
♦ 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 2.5V 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
tra ns is tor, the MAX8877/MAX8878 ma inta in 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 a miniature 5-pin SOT23 package.
(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
________________________Ap p lic a t io n s
_________________Ord e rin g In fo rm a t io n
Cellular Telephones
Cordless Telephones
PCS Telephones
PCMCIA Cards
PART**
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
Dice*
MAX8877C/Dxy
MAX8877EUKxy-T
MAX8878C/Dxy
MAX8878EUKxy-T
-40°C to +85°C
0°C to +70°C
5 SOT23-5
Dice*
-40°C to +85°C
5 SOT23-5
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
*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).
____________Typ ic a l Op e ra t in g Circ u it
_____________________P in Co n fig u ra t io n
TOP VIEW
INPUT
OUTPUT
2.5V TO 6.5V
PRESET
IN
OUT
2.5V TO 5.0V
150mA
1
2
3
5
4
OUT
BP
IN
GND
C
OUT
C
IN
1µF
1µF
MAX8877
MAX8878
MAX8877
MAX8878
ON
SHDN
BP
OFF
SHDN
GND
C
BP
0.01µF
SOT23-5
________________________________________________________________ Maxim Integrated Products
1
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