(PDF) MAX8868 Datasheet PDF | Maxim





MAX8868 Datasheet PDF

Part Number MAX8868
Description Low-Noise / Low-Dropout / 150mA Linear Regulators
Manufacture Maxim
Total Page 11 Pages
PDF Download Download MAX8868 Datasheet PDF

Features: Datasheet pdf 19-1302; Rev 1; 3/98 Low-Noise, Low-Dro pout, 150mA Linear Regulators in SOT23 _______________General Description The MAX8867/MAX8868 low-noise, low-dropout linear regulators operate from a 2.5V t o 6.5V input and deliver up to 150mA. T ypical output noise for these devices i s just 30µVRMS, and typical dropout is only 165mV at 150mA. The output voltag e is preset to voltages in the range of 2.5V to 5.0V, in 100mV increments. The MAX8867 and MAX8868 are pin-compatible with the MAX8863 and MAX8864, except f or the BP pin. Designed with an interna l P-channel MOSFET pass transistor, the MAX8867/MAX8868 maintain a low 100µA supply current, independent of the load current and dropout voltage. Other fea tures include a 10nA logic-controlled s hutdown mode, short-circuit and thermal -shutdown protection, and reverse batte ry protection. The MAX8868 also include s an auto-discharge function, which act ively discharges the output voltage to ground when the device is placed in shutdown. Both devices come i.

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MAX8868 datasheet
19-1302; Rev 3; 7/02
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
_______________General Description
The MAX8867/MAX8868 low-noise, low-dropout linear
regulators operate from a 2.5V to 6.5V input and deliver
up to 150mA. Typical output noise for these devices is
just 30µVRMS, and 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. The
MAX8867 and MAX8868 are pin-compatible with the
MAX8863 and MAX8864, except for the BP pin.
Designed with an internal P-channel MOSFET pass tran-
sistor, the MAX8867/MAX8868 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 thermal-
shutdown protection, and reverse battery protection.
The MAX8868 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 packages.
____________________________Features
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
________________________Applications
Cellular Telephones
Modems
Cordless Telephones
Hand-Held Instruments
PCS Telephones
Palmtop Computers
PCMCIA Cards
Electronic Planners
_________________Ordering Information
PART**
TEMP
RANGE
PIN-PACKAGE
MAX8867EUKxy-T
MAX8867EZKxy-T
MAX8867C/Dxy
MAX8868EUKxy-T
MAX8868EZKxy-T
MAX8868C/Dxy
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
SOT23-5 Regular
SOT23-5 Thin
Dice*
SOT23-5 Regular
SOT23-5 Thin
Dice*
*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
INPUT
2.5V TO 6.5V
IN OUT
CIN
1µF MAX8867
MAX8868
ON
OFF
SHDN
BP
CBP GND
0.01µF
COUT
1µF
OUTPUT
PRESET
2.5V TO 5.0V
150mA
__________________Pin Configuration
TOP VIEW
SHDN 1
5 BP
MAX8867
GND 2 MAX8868
IN 3
4 OUT
SOT23-5
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX8868 datasheet
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
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, BP to GND ..........................................-0.3V to (VIN + 0.3V)
Continuous Power Dissipation (TA = +70°C)
SOT23-5 Regular (derate 7.1mW/°C above +70°C) ....571mW
SOT23-5 Thin (derate 9.1mW/°C above +70°C) ..........727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
θJB (Regular)..................................................................140°C/W
θJB (Thin)........................................................................110°C/W
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = VOUT(NOMINAL) + 0.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
Input Voltage (Note 2)
Output Voltage Accuracy
Maximum Output Current
VIN
IOUT = 0mA, TA = +25°C
IOUT = 0mA to 120mA
2.5 6.5
-1.4 1.4
-3 2
150
Current Limit
Ground-Pin Current
Dropout Voltage (Note 2)
Line Regulation
Load Regulation
Output Voltage Noise
SHUTDOWN
ILIM
IQ
VLNR
VLDR
en
No load
IOUT = 150mA
IOUT = 1mA
IOUT = 50mA
IOUT = 150mA
VIN = (VOUT + 0.1V) to 6.5V, IOUT = 1mA
IOUT = 0mA to 120mA, COUT = 1µF
f = 10Hz to 100kHz,
CBP = 0.01µF
COUT = 10µF
COUT = 100µF
160
-0.15
390
85
100
1.1
55
165
0
0.01
30
20
180
120
0.15
0.04
SHDN Input Threshold
SHDN Input Bias Current
VIH VIN = 2.5V to 5.5V
VIL VIN = 2.5V to 5.5V
ISHDN VSHDN = VIN
Shutdown Supply Current
Shutdown Exit Delay
(Note 3)
IQ, SHDN VOUT = 0V
CBP = 0.1µF,
COUT = 1µF, no load
TA = +25°C
TA = +85°C
TA = +25°C
TA = +85°C
TA = +25°C
TA = -40°C to +85°C
2.0
0.4
0.01 100
0.5
0.01 1
0.2
30 150
300
Shutdown Discharge
Resistance
MAX8868 only
300
UNITS
V
%
mA
mA
µA
mV
%/V
%/mA
µVRMS
V
nA
µA
µs
2 _______________________________________________________________________________________




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