MAX8864 MAXIM [Maxim Integrated Products], MAX8864 Datasheet

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MAX8864

Manufacturer Part Number
MAX8864
Description
Low-Dropout, 120mA Linear Regulators
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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
19-0466; Rev 4; 7/12
Dual Mode is a trademark of Maxim Integrated Products.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
__________Typical Operating Circuit
_______________General Description
Cordless Telephones
PCS Telephones
Cellular Telephones
PCMCIA Cards
BATTERY
1µF
C
IN
Low-Dropout, 120mA Linear Regulators
SHDN
IN
GND
MAX8863
MAX8864
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
SET
OUT
C
1µF
OUT
OUTPUT
VOLTAGE
o Low Cost
o Low, 55mV Dropout Voltage @ 50mA I
o Low, 68µA No-Load Supply Current
o Low, 350µV
o Miniature External Components
o Thermal Overload Protection
o Output Current Limit
o Reverse Battery Protection
o Dual Mode™ Operation: Fixed or Adjustable
o Low-Power Shutdown
____________________________Features
* Alternate marking information: CY_ _ = MAX8863T,
CZ_ _ = MAX8863S, DA_ _ = MAX8864T, DB_ _ = MAX8864S
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX8863TEUK+T
MAX8863SEUK+T
MAX8863REUK+T
MAX8864TEUK+T
MAX8864SEUK+T
MAX8864REUK+T
__________________Pin Configuration
______________Ordering Information
Low, 80µA Operating Supply Current (even in
dropout)
(1.25V to 6.5V) Output
PART
TOP VIEW
RMS
SHDN
GND
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Output Noise
IN
1
2
3
MAX8863
MAX8864
SOT23
PACKAGE
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23
PIN-
5
4
SET
OUT
OUT
SOT TOP
MARK*
AABW
AABG
AABH
AABE
AABF
AABV
1

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MAX8864 Summary of contents

Page 1

... Dual Mode™ Operation: Fixed or Adjustable (1.25V to 6.5V) Output o Low-Power Shutdown ______________Ordering Information PART MAX8863TEUK+T MAX8863SEUK+T MAX8863REUK+T MAX8864TEUK+T MAX8864SEUK+T MAX8864REUK+T * Alternate marking information: CY_ _ = MAX8863T, CZ_ _ = MAX8863S, DA_ _ = MAX8864T, DB_ _ = MAX8864S + Denotes a lead(Pb)-free/RoHS-compliant package. __________________Pin Configuration TOP VIEW SHDN OUTPUT VOLTAGE C OUT 1µF OUT Output Noise ...

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

... GND A MIN PARAMETER SYMBOL SHDN Input Bias Current I Shutdown Supply Current I QSHDN Shutdown Discharge Resistance (MAX8864) SET INPUT Set Reference Voltage (Note 4) Set Input Leakage Current (Note 4) THERMAL PROTECTION Thermal Shutdown Temperature T ∆T Thermal Shutdown Hysteresis Note 2: Limits are 100% production tested at T relation using Statistical Quality Control (SQC) Methods ...

Page 4

Low-Dropout, 120mA Linear Regulators ____________________________Typical Operating Characteristics (continued +3.6V 1µ 1µF, MAX886_T OUT SUPPLY CURRENT vs. INPUT VOLTAGE 50mA LOAD 0mA LOAD 60 50 ...

Page 5

... LOAD OUT LOAD TRANSIENT 3.16V V 3.15V OUT 3.14V I LOAD 10µs/div 0.2V 0mA to 50mA OUT LOAD COUPLED OUT MAX8864 SHUTDOWN (NO LOAD OUT SHDN 0V 500µs/div NO LOAD = +25°C, unless otherwise noted.) A 3.16V V 3.15V OUT 3.14V I LOAD 3.16V V 3 ...

Page 6

... Low-Dropout, 120mA Linear Regulators ______________________________________________________________Pin Description PIN NAME Active-Low Shutdown Input. A logic low reduces the supply current to 0.1nA. On the MAX8864, a logic low 1 SHDN also causes the output voltage to discharge to GND. Connect to IN for normal operation. Ground. This pin also functions as a heatsink. Solder to large pads or the circuit board ground plane to max- ...

Page 7

... The output can be shorted to ground for an indefinite time period without damaging the part. Thermal overload protection limits total power dissipa- tion in the MAX8863/MAX8864. When the junction tem- perature exceeds T sends a signal to the shutdown logic, turning off the pass transistor and allowing the IC to cool. The thermal sensor will turn the pass transistor on again after the IC’ ...

Page 8

... JA package to the surrounding air. The GND pin of the MAX8863/MAX8864 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. Reverse Battery Protection ...

Page 9

... In battery-powered systems, this will deter- mine 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 R multiplied by the load current (see Electrical Characteristics ) ...

Page 10

Low-Dropout, 120mA Linear Regulators REVISION REVISION NUMBER DATE Added lead-free designation and updated continuous power dissipation and 3 5/11 θ 7/12 Corrected units for TOC 7 Maxim cannot assume responsibility for use of any circuitry other than circuitry ...

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