19-1818; Rev 1; 10/01
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
General Description
The MAX8882/MAX8883 dual, low-noise, low-dropout
linear regulators operate from a +2.5V to +6.5V input
and deliver up to 160mA each of continuous current.
Both versions offer low output noise and low dropout of
only 72mV at 80mA. Designed with an internal P-
channel MOSFET pass transistor, the MAX8882/
MAX8883 maintain a low 165µA supply current (both
LDOs on), independent of the load current and dropout
voltage. Other features include short-circuit protection
and thermal-shutdown protection. The MAX8882 has a
single shutdown input and provides an external refer-
ence bypass pin to improve noise performance. The
MAX8883 includes two independent logic-controlled
shutdown inputs. The MAX8882/MAX8883 are both
available in a miniature 6-pin SOT23 package.
o
o
o
o
o
o
o
Features
Two LDOs in Tiny SOT23
Up to 160mA Output Current (each LDO)
40µV
RMS
Output Noise (MAX8882)
72mV Dropout at 80mA Load
Low 165µA Operating Supply Current
62dB PSRR (greater than 56dB to 100kHz)
Independent Low-Power Shutdown Controls
(MAX8883)
o
Thermal-Overload and Short-Circuit Protection
o
Output Current Limit
MAX8882/MAX8883
Selector Guide
PART
MAX8882EUTJJ
MAX8882EUTAQ
MAX8882EUTA5
MAX8882EUTQ5
MAX8882EUTGG
MAX8883EUTJJ
MAX8883EUTAQ
MAX8883EUTA5
MAX8883EUTQ5
MAX8883EUTGG
V
OUTA
2.85
3.3
3.3
2.5
3.0
2.85
3.3
3.3
2.5
3.0
V
OUTB
2.85
2.5
1.8
1.8
3.0
2.85
2.5
1.8
1.8
3.0
TOP MARK
AANR
AAPW
AARY
AAPX
AAZT
AANS
AAPY
AARZ
AAPZ
AAZU
________________________Applications
µP/DSP Core/IO Power
Cellular and PCS Telephones
PDAs and Palmtop Computers
Notebook Computers
Digital Cameras
Hand-Held Instruments
Pin Configurations
TOP VIEW
***Other
combinations between 1.8V and 3.3V are available in
100mV increments. Contact factory for other versions.
Minimum order quantity is 50,000 units.
Ordering Information
PART
OUTB
1
6
OUTA
SHUT-
DOWN
Single
Dual
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
6 SOT23-6
6 SOT23-6
MAX8882EUT_
_*
GND
2
MAX8882
5
IN
MAX8883EUT_
_*
*See
Selector Guide
BP
3
4
SHDN
Typical Operating Circuit
OUTA
V
IN
2.5V to 6.5V
2.2µF
MAX8882
IN
MAX8883
OUTB
SHDN_
2.2µF
GND
( ) ARE FOR MAX8882 ONLY.
(BP)
0.01µF
V
OUTA
FIXED
(1.8V to 3.3V)
V
OUTB
FIXED
(1.8V to 3.3V)
SOT23-6
Pin Configurations continued at end of data sheet.
2.2µF
________________________________________________________________
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.
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
MAX8882/MAX8883
ABSOLUTE MAXIMUM RATINGS
IN,
SHDN, SHDNA, SHDNB,
BP to GND...............-0.3V to +7.0V
OUTA, OUTB to GND ..................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............695mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-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
(V
IN
= +3.6V,
SHDN
=
SHDNA
=
SHDNB
= IN, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Input Voltage
Undervoltage Lockout
Threshold
Output Voltage Accuracy
Maximum Output Current
Current Limit
Ground Current
Shutdown Supply Current
SHDN_
Input Threshold
SHDN_
Input Bias Current
Dropout Voltage
(Notes 2, 3)
Line Regulation
No Load, V
IN
= 6.5V
I
OUT
_ = 80mA, both LDOs
SHDN_
= GND, T
A
= +25°C
SHDN_
= GND
V
IH
V
IL
SHDN_
= GND or IN, T
A
= +25°C
SHDN_
= GND or IN
I
OUT
_ = 1mA
I
OUT
_ = 40mA
I
OUT
_ = 80mA
V
IN
= (V
OUT
_ + 0.4V or 2.5V) to + 6.5V,
I
OUT
_ = 1mA
10Hz to 100kHz, C
BP
= 0.01µF, C
OUT
_ = 4.7µF,
I
OUT
_ = 1mA
10Hz to 100kHz, C
OUT
_ = 4.7µF, I
OUT
_ = 10mA
MAX8882
MAX8883
-0.2
0
0.05
1
36
72
0
40
320
144
0.2
%/V
mV
1.6
0.4
100
V
IN
_ rising, hysteresis 40mV typical
T
A
= +25°C, I
OUT
_ = 1mA
I
OUT
_ = 1mA
I
OUT
_ = 100µA to 160mA
Continuous
CONDITIONS
MIN
2.5
2.15
-1
-2
-3
160
160
165
170
0.01
0.1
1
550
265
2.25
TYP
MAX
6.5
2.40
1
2
2
mA
mA
µA
µA
V
nA
%
UNITS
V
V
Output Voltage Noise
µV
RMS
2
_______________________________________________________________________________________
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3.6V,
SHDN
=
SHDNA
=
SHDNB
= IN, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Voltage AC PSRR
100Hz, C
OUT
_ = 4.7µF
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
MAX8883
60
160
10
°C
°C
CONDITIONS
100Hz, C
BP
= 0.01µF, C
OUT
_ = 4.7µF
MAX8882
MIN
TYP
62
dB
MAX
UNITS
MAX8882/MAX8883
Note 1:
All units are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are
guaranteed by design.
Note 2:
The dropout voltage is defined as V
IN
- V
OUT
when V
IN
= V
OUT
(NOM). Specification only applies when V
OUT
≥
2.5V.
Note 3:
See the
Typical Operating Characteristics
for guaranteed specifications at voltages other than 3.3V.
Typical Operating Characteristics
(V
OUT
_ = 2.85V, I
OUT
_ = 80mA, V
IN
= +3.6V, C
OUT
_ = 2.2µF, C
BP
= 0.01µF, and C
IN
= 2.2µF, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX8882/3 toc01
SUPPLY CURRENT
vs. LOAD CURRENT
MAX8882/3 toc02
SUPPLY CURRENT
vs. TEMPERATURE
180
160
SUPPLY CURRENT (µA)
140
120
100
80
60
40
20
0
80mA LOAD, BOTH OUTPUTS
MAX8882/3 toc03
250
80mA LOAD, BOTH OUTPUTS
200
180
160
SUPPLY CURRENT (µA)
140
120
100
80
60
40
20
BOTH OUTPUTS LOADED
200
200
SUPPLY CURRENT (µA)
150
NO LOAD
100
50
0
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
0
0
10
20
30
40
50
60
70
80
LOAD CURRENT (mA)
-40
-15
10
35
60
85
TEMPERATURE (°C)
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX8882/3 toc04
DROPOUT vs. V
OUT
MAX8882/83 toc05
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
0.8
0.6
OUTPUT VOLTAGE (%)
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
MAX8882/83 toc06
90
75
DROPOUT VOLTAGE (mV)
60
45
30
15
0
0
10
20
30
40
50
60
70
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
200
180
160
140
DROPOUT (mV)
120
100
80
60
40
20
0
MEAN
GUARANTEED MAXIMUM
1.0
80
2.5
2.7
2.9
V
OUT
(V)
3.1
3.3
-40
-25
-10
5
20
35
50
65
80
LOAD CURRENT (mA)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
MAX8882/MAX8883
Typical Operating Characteristics (continued)
(V
OUT
_ = 2.85V, I
OUT
_ = 80mA, V
IN
= +3.6V, C
OUT
_ = 2.2µF, C
BP
= 0.01µF, and C
IN
= 2.2µF, unless otherwise noted.)
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY
MAX8882/3 toc07
PSRR vs. FREQUENCY
70
60
50
PSRR (dB)
40
30
20
10
0
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
100Ω LOAD
120
100Ω LOAD
100
80
60
40
20
0
0.01
0.1
1
10
100
THERMAL
COUPLING
CAPACITVE
COUPLING
1000
FREQUENCY (kHz)
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
MAX8882/3 toc09
MAX8882 OUTPUT NOISE
(10Hz to 100kHz)
MAX8882/3 toc10
10000
NOISE DENSITY (nV/√Hz)
1000
V
OUT
_
500µV/div
(AC-COUPLED)
100
10
0.01
0.1
1
10
100
1000
1ms/div
LINE TRANSIENT
MAX8882/3 toc11
LOAD TRANSIENT
(V
IN
= 3.35V, I
LOAD
= 0 TO 80mA)
4.5V
3.5V
1V/div
V
OUT
_
MAX8882/3 toc12
V
IN
V
OUT
_
20mV/div
(AC-COUPLED)
I
LOAD
0
50µs/div
10µs/div
4
_______________________________________________________________________________________
MAX8882/3 toc08
20mV/div
(AC-COUPLED)
50mA/div
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
Typical Operating Characteristics (continued)
(V
OUT
_ = 2.85V, I
OUT
_ = 80mA, V
IN
= +3.6V, C
OUT
_ = 2.2µF, C
BP
= 0.01µF, and C
IN
= 2.2µF, unless otherwise noted.)
LOAD TRANSIENT NEAR DROPOUT
MAX8882/3 toc13
MAX8882/MAX8883
SHUTDOWN RESPONSE
MAX8882/3 toc14
R
LOAD
= 100Ω
V
OUT
20mV/div
OUTPUT
VOLTAGE
0
20V/div
V
IN
= V
OUT
+ 0.1V
I
LOAD
50µA/div
0
SHUTDOWN
VOLTAGE
0
1ms/div
1V/div
10µs/div
Pin Description
PIN
MAX8882
1
MAX8883
1
NAME
FUNCTION
Regulator B Output. Sources up to 160mA continuous current. Bypass with a
2.2µF (<0.5Ω typ ESR) capacitor to GND (see the
Capacitor Selection and
Regulator Stability
section).
Ground. This pin also functions as a heatsink. Solder to a large pad or the
circuit-board ground plane to maximize thermal dissipation.
Reference Noise Bypass. Bypass with a low-leakage 0.01µF ceramic
capacitor for reduced noise at both outputs.
Shutdown A Input. A logic low shuts down regulator A. If
SHDNA
and
SHDNB
are both low, both regulators and the reference turn off, and supply
current is reduced to 10nA. If either
SHDNA
or
SHDNB
is a logic high, the
reference is on. Connect to IN for normal operation.
Shutdown B Input. A logic low shuts down regulator B. If
SHDNA
and
SHDNB
are both low, both regulators and the reference turn off, and supply
current is reduced to 10nA. If either
SHDNA
or
SHDNB
is a logic high, the
reference is on. Connect to IN for normal operation.
Shutdown Input. A logic low shuts down both regulators and the reference,
reducing the entire supply current to 10nA. Connect to IN for normal
operation.
Regulator Input. Supply voltage can range from +2.5V to +6.5V. This input
also supplies the on-chip reference. Bypass with 2.2µF to GND (see the
Capacitor Selection and Regulator Stability
section).
Regulator A Output. Sources up to 160mA continuous current. Bypass with
a 2.2µF (<0.5Ω typ ESR) capacitor to GND (see the
Capacitor Selection and
Regulator Stability
section).
OUTB
2
3
2
—
GND
BP
—
3
SHDNA
—
4
SHDNB
4
—
SHDN
5
5
IN
6
6
OUTA
_______________________________________________________________________________________
5
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