MAX8877-MAX8878 MAXIM [Maxim Integrated Products], MAX8877-MAX8878 Datasheet

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MAX8877-MAX8878

Manufacturer Part Number
MAX8877-MAX8878
Description
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
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 30µV
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.
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 a miniature 5-pin SOT23 package.
________________________Applications
19-1301; Rev 1; 3/98
____________Typical Operating Circuit
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
__________________General Description
ON
Cellular Telephones
Cordless Telephones
PCS Telephones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
INPUT
2.5V TO 6.5V
OFF
1 F
C
IN
C
0.01 F
BP
________________________________________________________________ Maxim Integrated Products
IN
SHDN
BP
Low-Noise, Low-Dropout, 150mA Linear
MAX8877
MAX8878
GND
OUT
C
1 F
OUT
OUTPUT
PRESET
2.5V TO 5.0V
150mA
Regulators with ‘2982 Pinout
RMS
, and
* Dice are tested at T
** xy is the output voltage code (see Expanded Ordering
____________________________Features
_________________Ordering Information
_____________________Pin Configuration
MAX8877C/Dxy
MAX8877EUKxy-T
MAX8878C/Dxy
MAX8878EUKxy-T
Information table at end of data sheet).
Pin-Compatible with the Industry-Standard ‘2982
Low Output Noise: 30µV
Low 55mV Dropout at 50mA Output
(165mV at 150mA output)
Low 85µA No-Load Supply Current
Low 100µA Operating Supply Current
(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
TOP VIEW
PART**
SHDN
GND
A
IN
= +25°C only.
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
1
2
3
0°C to +70°C
0°C to +70°C
SOT23-5
MAX8877
MAX8878
RMS
5
4
OUT
BP
Dice*
5 SOT23-5
Dice*
5 SOT23-5
PIN-PACKAGE
1

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MAX8877-MAX8878 Summary of contents

Page 1

... The output voltage is preset to voltages in the range of 2.5V 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 ...

Page 2

Low-Noise, Low-Dropout, 150mA Linear Regulators with ‘2982 Pinout ABSOLUTE MAXIMUM RATINGS IN to GND ....................................................................-7V to +7V Output Short-Circuit Duration ............................................Infinite SHDN to GND..............................................................-7V to +7V SHDN to IN ...............................................................-7V to +0.3V OUT GND ..........................................-0. Continuous ...

Page 3

Low-Noise, Low-Dropout, 150mA Linear __________________________________________Typical Operating Characteristics ( 0.5V 1µ OUT(NOMINAL) IN OUTPUT VOLTAGE vs. LOAD CURRENT (MAX887_EUK25) 2.60 2.55 2.50 2.45 2. 100 LOAD CURRENT (mA) GROUND PIN CURRENT vs. ...

Page 4

Low-Noise, Low-Dropout, 150mA Linear Regulators with ‘2982 Pinout ____________________________Typical Operating Characteristics (continued 0.5V 1µ OUT(NOMINAL) IN DROPOUT VOLTAGE vs. LOAD CURRENT (MAX887_EUK25) 250 T = +85°C A 200 T = +25°C A ...

Page 5

... MAX887_EUK50 50mA LOAD FUNCTION LOAD-TRANSIENT RESPONSE NEAR DROPOUT 3.01V V OUT 3.00V 2.99V 50mA I LOAD 10 s/div MAX887_EUK30 0.1V, IN OUT 0mA TO 50mA IN LOAD ENTERING SHUTDOWN V SHDN OUT 0V 500 s/div MAX8878, NO LOAD MAX8877-20 V OUT I LOAD MAX8877-23 V SHDN V OUT 5 ...

Page 6

... For example, the MAX8877EUK33 has a preset output voltage of 3.3V (see Expanded Ordering Information ). Internal P-Channel Pass Transistor The MAX8877/MAX8878 feature a 1.1Ω typical P-channel MOSFET pass transistor ...

Page 7

... BA printed circuit board, copper traces, and other materi- als to the surrounding air. The GND pin of the MAX8877/MAX8878 performs the dual function of providing an electrical connection to ground and channeling heat away. Connect the GND pin to ground using a large pad or ground plane. ...

Page 8

... Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products ply voltage. In battery-powered systems, this will deter- mine the useful end-of-life battery voltage. Because the MAX8877/MAX8878 use a P-channel MOSFET pass transistor, their dropout voltage is a function of drain-to- source on-resistance (R current (see Typical Operating Characteristics ). ...

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