Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - LDO voltage regulator Positive, fixed or adjustable SOT 23 5

__________________General Description

The MAX8863T/S/R and MAX8864T/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, 80µA supply current to remain inde-

pendent of load, making these devices ideal for

battery-operated portable equipment such as cellular

phones, cordless phones, and modems.

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. Other fea-

tures include low-power shutdown, short-circuit protec-

tion, thermal shutdown protection, and reverse battery

protection. The MAX8864 also includes an auto-dis-

charge function, which actively discharges the output

voltage to ground when the device is placed in shut-

down mode. Both devices come in a miniature 5-pin

SOT23 package.

________________________Applications

Cordless Telephones Modems

PCS Telephones Hand-Held Instruments

Cellular Telephones Palmtop Computers

PCMCIA Cards Electronic Planners

____________________________Features

o Low Cost

o Low, 55mV Dropout Voltage at 50mA I

OUT

o Low, 68µA No-Load Supply Current

Low, 80µA Operating Supply Current (even in

dropout)

o Low, 350µV

RMS

Output Noise

o Miniature External Components

o Thermal Overload Protection

o Output Current Limit

o Reverse Battery Protection

o Dual Mode Operation: Fixed or Adjustable (1.25V

to 6.5V) Output

o Low-Power Shutdown

19-0466; Rev 5; 4/13

MAX8863T/S/R,

MAX8864T/S/R

Low-Dropout, 120mA Linear Regulators

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

SOT23

TOP VIEW

GND

OUT

SET

SHDN

MAX8863

MAX8864

__________________Pin Configuration

MAX8863

MAX8864

OUT

GND SET

SHDN

OUT

1μF

BATTERY

OUTPUT

VOLTAGE

__________Typical Operating Circuit

______________Ordering Information

Dual Mode is a trademark of Maxim Integrated Products, Inc.

Alternate marking information: CY_ _ = MAX8863T,

CZ_ _ = MAX8863S, DA_ _ = MAX8864T, DB_ _ = MAX8864S

Denotes a lead(Pb)-free/RoHS-compliant package.

PART

TEMP RANGE

PIN-

PACKAGE

SOT TOP

MARK*

MAX8863TEUK+T

-40°C to +85°C 5 SOT23

AABE

MAX8863TMUK/PR3

-55°C to +125°C 5 SOT23

AFMK

MAX8863SEUK+T

-40°C to +85°C 5 SOT23

AABF

MAX8863REUK+T

-40°C to +85°C 5 SOT23

AABV

MAX8864TEUK+T

-40°C to +85°C 5 SOT23

AABG

MAX8864SEUK+T

-40°C to +85°C 5 SOT23

AABH

MAX8864REUK+T

-40°C to +85°C 5 SOT23

AABW

Summary of content (10 pages)

PAGE 1
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators __________________General Description ____________________________Features The MAX8863T/S/R and MAX8864T/S/R low-dropout linear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 80µA supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones, cordless phones, and modems.
PAGE 2
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators ABSOLUTE MAXIMUM RATINGS VIN to GND ..................................................................-7V to +7V Output Short-Circuit Duration ............................................Infinite SET to GND ..............................................................-0.3V to +7V SHDN to GND..............................................................-7V to +7V SHDN to IN ...............................................................
PAGE 3
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators ELECTRICAL CHARACTERISTICS (continued) (VIN = +3.6V, VGND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS SHDN Input Bias Current I SHDN V SHDN = VIN Shutdown Supply Current IQSHDN VOUT = 0V MIN TYP MAX TA = +25°C 0 100 TA = TMAX 0.05 TA = +25°C 0.0001 TA = TMAX 0.
PAGE 4
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators ____________________________Typical Operating Characteristics (continued) (VIN = +3.6V, CIN = 1µF, COUT = 1µF, MAX886_T, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE vs. TEMPERATURE 70 ILOAD = 0mA 60 50 40 30 ILOAD = 50mA 90 80 3.20 3.15 3.10 20 70 60 50 40 30 20 3.05 10 10 3.00 2 4 3 5 -20 0 20 40 80 60 100 -20 0 20 40 60 80 100 DROPOUT VOLTAGE vs. LOAD CURRENT POWER-SUPPLY REJECTION RATIO vs.
PAGE 5
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators ____________________________Typical Operating Characteristics (continued) (VIN = +3.6V, CIN = 1µF, COUT = 1µF, MAX886_T, TA = +25°C, unless otherwise noted.) LOAD TRANSIENT LINE TRANSIENT 3.16V 3.16V VOUT 3.15V VOUT 3.15V 3.14V 3.14V VIN 4.6V ILOAD 3.6V 10μs/div ILOAD = 0mA to 50mA, CIN = 10µF, VOUT IS AC COUPLED 50μs/div ILOAD = 50mA, VOUT IS AC COUPLED LOAD TRANSIENT LOAD TRANSIENT 3.16V 3.16V VOUT 3.15V VOUT 3.15V 3.14V 3.
PAGE 6
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators ______________________________________________________________Pin Description PIN NAME FUNCTION 1 SHDN Active-Low Shutdown Input. A logic low reduces the supply current to 0.1nA. On the MAX8864, a logic low also causes the output voltage to discharge to GND. Connect to IN for normal operation. 2 GND Ground. This pin also functions as a heatsink. Solder to large pads or the circuit board ground plane to maximize thermal dissipation.
PAGE 7
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators MAX8863 MAX8864 CIN BATTERY 1μF OUTPUT VOLTAGE OUT IN SHDN R1 20pF SET R2 GND COUT 1μF RL Choose R2 = 100kΩ to optimize power consumption, accuracy, and high-frequency power-supply rejection. The total current through the external resistive feedback and load resistors should not be less than 10µA. Since the VSET tolerance is typically less than ±25mV, the output can be set using fixed resistors instead of trim pots.
PAGE 8
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators Operating Region and Power Dissipation Maximum power dissipation of the MAX8863/MAX8864 depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the rate of air flow. The power dissipation across the device is P = IOUT (VIN VOUT).
PAGE 9
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators Input-Output (Dropout) Voltage A regulator’s minimum input-output voltage differential (or dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this will determine the useful end-of-life battery voltage. Because the MAX8863/MAX8864 use a P-channel MOSFET pass transistor, their dropout voltage is a function of RDS(ON) multiplied by the load current (see Electrical Characteristics).
PAGE 10
MAX8863T/S/R, MAX8864T/S/R Low-Dropout, 120mA Linear Regulators Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 3 5/11 Added lead-free designation and updated continuous power dissipation and θJA specs 1, 2 4 7/12 Corrected units for TOC 7 5 4/13 Updated Ordering Information and Electrical Characteristics 4 1, 3 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product.