max8874teukt Maxim Integrated Products, Inc., max8874teukt Datasheet

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max8874teukt

Manufacturer Part Number
max8874teukt
Description
Low-dropout 120ma Linear Regulators
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The MAX8873T/S/R and MAX8874T/S/R low-dropout lin-
ear regulators operate from a +2.5V to +6.5V input
range and deliver up to 120mA. A PMOS pass transis-
tor allows the low, 82µA supply current to remain inde-
pendent of load, making these devices ideal for
battery-operated portable equipment such as cellular
phones and cordless phones.
The devices feature Dual Mode™ operation: their out-
put voltage is 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 an external resistor divider. Total error on
the output is ±3.5%. Output voltages are set on the low
side of popular ranges so that power drain is minimized
for longer battery life. Other features include low-power
shutdown, short-circuit protection, thermal shutdown
protection, and reverse battery protection. The
MAX8874 also includes an auto-discharge function,
which actively discharges the output voltage to ground
when the device is placed in shutdown mode. Both
devices come in a miniature 5-pin SOT23 package.
For dual versions, refer to the MAX8865/MAX8866 data
sheet. For low-noise versions with 30µV
noise, refer to the MAX8877/MAX8878.
________________________Applications
19-1257; Rev 1; 3/98
Dual Mode is a trademark of Maxim Integrated Products.
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.
__________Typical Operating Circuit
_______________General Description
Cordless Telephones
PCS Telephones
Cellular Telephones
PCMCIA Cards
BATTERY
1µF
C
IN
________________________________________________________________ Maxim Integrated Products
Low-Dropout, 120mA Linear Regulators
SHDN
IN
GND
MAX8873
MAX8874
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
SET
OUT
RMS
C
1µF
OUT
OUTPUT
VOLTAGE
output
____________________________Features
__________________Pin Configuration
______________Ordering Information
MAX8873TEUK-T
MAX8873SEUK-T
MAX8873REUK-T -40°C to +85°C
MAX8874TEUK-T -40°C to +85°C
MAX8874SEUK-T -40°C to +85°C
MAX8874REUK-T -40°C to +85°C
LP2980 Pin-Compatible SOT23 Package
Low, 55mV Dropout Voltage at 50mA I
(130mV at 120mA)
Low, 73µA No-Load Supply Current
Low, 82µA Operating Supply Current (even in
dropout)
Miniature External Components
Thermal Overload Protection
Output Current Limit
Reverse Battery Protection
Dual Mode Operation: Fixed or Adjustable
(1.25V to 6.5V) Output
Low-Power Shutdown
TOP VIEW
PART
SHDN
GND
IN
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
1
2
3
SOT23-5
MAX8873
MAX8874
PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
4
5
PIN-
OUT
SET
OUT
SOT TOP
MARK
ABZH
ABZM
ABZK
ABZL
ABZJ
ABZI
1

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max8874teukt Summary of contents

Page 1

Rev 1; 3/98 Low-Dropout, 120mA Linear Regulators _______________General Description The MAX8873T/S/R and MAX8874T/S/R low-dropout lin- ear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transis- tor allows the low, 82µA ...

Page 2

Low-Dropout, 120mA Linear Regulators ABSOLUTE MAXIMUM RATINGS V to GND ..................................................................-7V to +7V IN Output Short-Circuit Duration ............................................Infinite SET to GND ..............................................................-0.3V to +7V SHDN to GND..............................................................-7V to +7V SHDN to IN .................................................................-7V to 0.3V OUT to GND ................................................-0.3V to ...

Page 3

Low-Dropout, 120mA Linear Regulators ELECTRICAL CHARACTERISTICS (continued +3.6V unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL SET INPUT SET Reference Voltage (Note 3) V SET SET ...

Page 4

Low-Dropout, 120mA Linear Regulators ____________________________Typical Operating Characteristics (continued +3.6V 1µ 1µF, MAX887_T OUT SUPPLY CURRENT vs. INPUT VOLTAGE 100 I = 50mA LOAD 0mA LOAD 60 ...

Page 5

Low-Dropout, 120mA Linear Regulators ____________________________Typical Operating Characteristics (continued +3.6V 1µ 1µF, MAX887_T OUT LINE-TRANSIENT RESPONSE 3.16V V 3.15V OUT 3.14V 4. 3.6V 50 s/div I = 50mA ...

Page 6

Low-Dropout, 120mA Linear Regulators ______________________________________________________________Pin Description PIN NAME Regulator Input. Supply voltage can range from 2.5V to 6.5V. Bypass with 1µF to GND (see Capacitor 1 IN Selection and Regulator Stability ). Ground. This pin also functions as a heatsink. ...

Page 7

Low-Dropout, 120mA Linear Regulators 5 1 OUT IN MAX8873 MAX8874 3 4 SHDN SET C IN BATTERY 1µF GND 2 Figure 2. Adjustable Output Using External Feedback Resistors Internal P-Channel Pass Transistor The MAX8873/MAX8874 feature a 1.1Ω typical P-chan- nel ...

Page 8

Low-Dropout, 120mA Linear Regulators Operating Region and Power Dissipation Maximum power dissipation of the MAX8873/MAX8874 depends on the thermal resistance of the case and cir- cuit board, the temperature difference between the die junction and ambient air, and the rate ...

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