19-1302; Rev 3; 7/02
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
____________________________Features
♦ Low Output Noise: 30µVRMS
________________________Applications
_________________Ordering Information
Cellular Telephones
Modems
Cordless Telephones
Hand-Held Instruments
PCS Telephones
Palmtop Computers
PCMCIA Cards
Electronic Planners
♦ 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
PART**
TEMP
RANGE
MAX8867EUKxy-T
-40°C to +85°C
SOT23-5 Regular
MAX8867EZKxy-T
-40°C to +85°C
SOT23-5 Thin
MAX8867C/Dxy
PIN-PACKAGE
0°C to +70°C
Dice*
MAX8868EUKxy-T
-40°C to +85°C
SOT23-5 Regular
MAX8868EZKxy-T
-40°C to +85°C
SOT23-5 Thin
MAX8868C/Dxy
0°C to +70°C
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
__________________Pin Configuration
TOP VIEW
INPUT
2.5V TO 6.5V
IN
CIN
1µF
OUT
MAX8867
MAX8868
ON
COUT
1µF
OUTPUT
PRESET
2.5V TO 5.0V
150mA
SHDN 1
GND 2
5
BP
4
OUT
MAX8867
MAX8868
SHDN
OFF
CBP
0.01µF
BP
GND
IN 3
SOT23-5
________________________________________________________________ Maxim Integrated Products
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.
1
MAX8867/MAX8868
_______________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 transistor, the MAX8867/MAX8868 maintain a low 100µA
supply current, independent of the load current and
dropout voltage. Other features include a 10nA logiccontrolled shutdown mode, short-circuit and thermalshutdown 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.
MAX8867/MAX8868
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
Input Voltage (Note 2)
SYMBOL
CONDITIONS
VIN
IOUT = 0mA, TA = +25°C
Output Voltage Accuracy
IOUT = 0mA to 120mA
Maximum Output Current
Current Limit
Ground-Pin Current
MAX
UNITS
2.5
TYP
6.5
V
-1.4
1.4
-3
2
150
ILIM
IQ
Dropout Voltage (Note 2)
160
85
IOUT = 150mA
100
IOUT = 1mA
1.1
IOUT = 50mA
55
IOUT = 150mA
165
∆VLNR
VIN = (VOUT + 0.1V) to 6.5V, IOUT = 1mA
Load Regulation
∆VLDR
IOUT = 0mA to 120mA, COUT = 1µF
en
f = 10Hz to 100kHz,
CBP = 0.01µF
VIH
VIN = 2.5V to 5.5V
VIL
VIN = 2.5V to 5.5V
-0.15
%
mA
390
No load
Line Regulation
Output Voltage Noise
MIN
mA
180
µA
120
mV
0
0.15
%/V
0.01
0.04
%/mA
COUT = 10µF
30
COUT = 100µF
20
µVRMS
SHUTDOWN
SHDN Input Threshold
SHDN Input Bias Current
ISHDN
Shutdown Supply Current
IQ, SHDN
VSHDN = VIN
VOUT = 0V
Shutdown Exit Delay
(Note 3)
CBP = 0.1µF,
COUT = 1µF, no load
Shutdown Discharge
Resistance
MAX8868 only
2
2.0
0.4
TA = +25°C
0.01
TA = +85°C
0.5
TA = +25°C
0.01
TA = +85°C
0.2
TA = +25°C
30
TA = -40°C to +85°C
100
1
150
300
300
_______________________________________________________________________________________
V
nA
µA
µs
Ω
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
(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
UNITS
THERMAL PROTECTION
Thermal-Shutdown
Temperature
TSHDN
155
°C
Thermal-Shutdown
Hysteresis
∆TSHDN
15
°C
Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed through
correlation using Statistical Quality Control (SQC) Methods.
Note 2: The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V.
Note 3: Time needed for VOUT to reach 95% of final value.
__________________________________________Typical Operating Characteristics
(VIN = VOUT(NOMINAL) + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25°C, unless otherwise noted.)
MAX886 E_K50
OUTPUT VOLTAGE vs. LOAD CURRENT
2.55
2.50
MAX8867/8-02
5.1
5.0
2.45
4.9
2.40
4.8
110
105
GROUND PIN CURRENT (µA)
MAX8867/8-01
5.2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.60
GROUND PIN CURRENT
vs. LOAD CURRENT
MAX8867/8-03
MAX886 E_K25
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX886 E_K50
100
95
MAX886 E_K25
90
85
80
75
70
65
50
100
50
100
150
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAX886 E_K25
GROUND PIN CURRENT vs. INPUT VOLTAGE
MAX886 E_K50
GROUND PIN CURRENT vs. INPUT VOLTAGE
40
20
80
NO LOAD
60
40
1
2
3
4
INPUT VOLTAGE (V)
5
6
5
MAX886 E_K50
4
3
2
MAX886 E_K25
0
0
0
150
1
20
0
100
OUTPUT VOLTAGE vs. INPUT VOLTAGE
OUTPUT VOLTAGE (V)
NO LOAD
60
ILOAD = 50mA
100
GROUND PIN CURRENT (µA)
80
50
6
MAX8867/8-05
ILOAD = 50mA
100
0
LOAD CURRENT (mA)
120
MAX8867/8-04
120
GROUND PIN CURRENT (µA)
60
0
150
MAX8867/8-06
0
0
1
2
3
4
INPUT VOLTAGE (V)
5
6
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
_______________________________________________________________________________________
3
MAX8867/MAX8868
ELECTRICAL CHARACTERISTICS (continued)
____________________________Typical Operating Characteristics (continued)
(VIN = VOUT(NOMINAL) + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25°C, unless otherwise noted.)
MAX886 E_K50
OUTPUT VOLTAGE vs. TEMPERATURE
2.50
5.10
5.00
4.90
2.45
ILOAD = 50mA
180
GROUND PIN CURRENT (µA)
ILOAD = 50mA
OUTPUT VOLTAGE (V)
2.55
GROUND PIN CURRENT vs. TEMPERATURE
200
MAX8867/8-08
ILOAD = 50mA
OUTPUT VOLTAGE (V)
5.20
MAX8867/8-07
2.60
MAX8867/8-09
MAX886 E_K25
OUTPUT VOLTAGE vs. TEMPERATURE
160
140
MAX886 E_K50
120
100
80
MAX886 E_K25
60
40
20
4.80
-20
0
20
40
60
80
-20
0
20
40
60
80
100
-40
0
20
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
MAX886 E_K25
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX886 E_K50
DROPOUT VOLTAGE vs. LOAD CURRENT
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
DROPOUT VOLTAGE (mV)
TA = +85°C
150
TA = +25°C
100
TA = -40°C
150
60
COUT = 10µF
TA = +25°C
50
PSRR (dB)
200
TA = +85°C
100
TA = -40°C
COUT = 1µF
40
30
20
50
ILOAD = 50mA
CBP = 0.1µF
10
0
0
40
60
80
100 120
140
0
160
20
LOAD CURRENT (mA)
60
80
100 120
140
OUTPUT NOISE (µVRMS)
1
COUT = 1µF
COUT = 10µF
ILOAD = 10mA
f = 10Hz TO 100kHz
70
50
MAX886 E_K50
40
MAX886 E_K30
20
MAX886 E_K25
COUT = 10µF
0
10
FREQUENCY (kHz)
100
1000
10
100
60
50
MAX886 E_K50
40
MAX886 E_K30
30
20
MAX886 E_K25
0
0.001
0.01
BP CAPACITANCE (µF)
1000
COUT = 10µF
CBP = 0.01µF
f = 10Hz TO 100kHz
10
10
0.01
1
OUTPUT NOISE vs. LOAD CURRENT
60
30
0.1
FREQUENCY (kHz)
80
MAX8867/8-13
CBP = 0.01µF
ILOAD = 10mA
1
0.01
OUTPUT NOISE vs. BP CAPACITANCE
10
0.1
0
160
LOAD CURRENT (mA)
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
0.1
40
OUTPUT NOISE (µVRMS)
20
MAX8867/8-14
0
100
70
MAX8867/8-11
MAX8867/8-10
200
50
4
-20
TEMPERATURE (°C)
250
DROPOUT VOLTAGE (mV)
0
-40
100
MAX8867/8-12
-40
0.1
1
10
LOAD CURRENT (mA)
_______________________________________________________________________________________
100
MAX8867/8-15
2.40
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT
LOAD-TRANSIENT RESPONSE
3.01V
3.01V
3.00V
3.00V
VOUT
2.99V
LINE-TRANSIENT RESPONSE
MAX8867/8-20
MAX8867/8-19
MAX8867/8-18
4V
VIN
3V
VOUT
2.99V
3.001V
VOUT
50mA
50mA
2.999V
ILOAD
ILOAD
0mA
0mA
10µs/div
MAX886 E_K30, VIN = VOUT + 0.1V,
CIN = 10µF, ILOAD = 0mA TO 50mA
10µs/div
MAX886 E_K30, VIN = VOUT + 0.5V,
CIN = 10µF, ILOAD = 0mA TO 50mA
MAX8868
ENTERING SHUTDOWN
MAX886 E_K50
SHUTDOWN EXIT DELAY
MAX886 E_K25
SHUTDOWN EXIT DELAY
MAX8867/8-25
2V
100µs/div
MAX886 E_K30, ILOAD = 50mA
MAX8867-23
MAX8867-21
VSHDN
VSHDN
2V
CBP = 0.01µF
0V
0V
0V
4V
VOUT
CBP = 0.1µF
1V
CBP = 0.1µF
VOUT
2V
0V
0V
500µs/div
NO LOAD
CBP = 0.01µF
0V
2V
VOUT
VSHDN
2V
5µs/div
5µs/div
ILOAD = 50mA
ILOAD = 50mA
MAX886 E_K25
10Hz TO 100kHz OUTPUT NOISE
REGION OF STABLE COUT ESR
vs. LOAD CURRENT
MAX8867/8-17
MAX8867/8-16
100
COUT ESR (Ω)
10
VOUT
50µV/div
COUT = 1µF
1
COUT = 10µF
STABLE REGION
0.1
0.01
1ms/div
COUT = 10µF, CBP = 0.1µF, ILOAD = 10mA
0
20
40
60
80
100
120
140
LOAD CURRENT (mA)
_______________________________________________________________________________________
5
MAX8867/MAX8868
____________________________Typical Operating Characteristics (continued)
(VIN = VOUT(NOMINAL) + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25°C, unless otherwise noted.)
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
______________________________________________________________Pin Description
PIN
NAME
1
SHDN
Active-Low Shutdown Input. A logic low reduces the supply current to 10nA. On the MAX8868, 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 a large pad or the circuit-board ground plane to
maximize power dissipation.
3
IN
Regulator Input. Supply voltage can range from 2.5V to 6.5V. Bypass with a 1µF capacitor to GND (see
Capacitor Selection and Regulator Stability section).
4
OUT
5
BP
IN
SHDN
FUNCTION
Regulator Output. Sources up to 150mA. Bypass with a 1µF (