MAX8877 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8877 Datasheet PDF : 10 Pages
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19-1301; Rev 2; 1/01
Low-Noise, Low-Dropout, 150mA Linear
Regulators with '2982 Pinout
__________________General Description
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
dropout voltage. Typical output noise is 30µVRMS, and
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.
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.
________________________Applications
Cellular Telephones
Cordless Telephones
PCS Telephones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
____________________________Features
o Pin-Compatible with the Industry-Standard '2982
o Low Output Noise: 30µVRMS
o Low 55mV Dropout at 50mA Output
(165mV at 150mA output)
o Low 85µA No-Load Supply Current
o Low 100µA Operating Supply Current
(even in dropout)
o Thermal-Overload and Short-Circuit Protection
o Reverse Battery Protection
o Output Current Limit
o Preset Output Voltages (±1.4% Accuracy)
o 10nA Logic-Controlled Shutdown
_________________Ordering Information
PART**
TEMP.
RANGE
PIN-PACKAGE
MAX8877C/Dxy
MAX8877EUKxy-T
MAX8877EZKxy-T
MAX8878C/Dxy
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
Dice*
5 SOT23-5 Regular
5 SOT23-5 Thin
Dice*
MAX8878EUKxy-T -40°C to +85°C 5 SOT23-5 Regular
MAX8878EZKxy-T -40°C to +85°C 5 SOT23-5 Thin
*Dice are tested at TA = +25°C only.
**xy is the output voltage code (see Expanded Ordering
Information table at end of data sheet).
____________Typical Operating Circuit _____________________Pin Configuration
INPUT
2.5V TO 6.5V
IN
OUT
CIN
1µF
ON
OFF
MAX8877
MAX8878
SHDN
COUT
3.3µF
BP
CBP
GND
0.01µF
OUTPUT
PRESET
1.5V TO 5.0V
150mA
TOP VIEW
IN 1
5 OUT
MAX8877
GND 2 MAX8878
SHDN 3
4 BP
SOT23-5
REGULAR AND THIN
________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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