19-1818; Rev 1; 10/01
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
Features
♦
♦
♦
♦
♦
♦
♦
Two LDOs in Tiny SOT23
Up to 160mA Output Current (each LDO)
40µVRMS 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)
♦ Thermal-Overload and Short-Circuit Protection
♦ Output Current Limit
Selector Guide
VOUTA
VOUTB
MAX8882EUTJJ
2.85
2.85
AANR
MAX8882EUTAQ
3.3
2.5
AAPW
µP/DSP Core/IO Power
MAX8882EUTA5
3.3
1.8
AARY
Cellular and PCS Telephones
MAX8882EUTQ5
2.5
1.8
AAPX
PDAs and Palmtop Computers
MAX8882EUTGG
3.0
3.0
AAZT
Notebook Computers
MAX8883EUTJJ
2.85
2.85
AANS
Digital Cameras
MAX8883EUTAQ
3.3
2.5
AAPY
MAX8883EUTA5
3.3
1.8
AARZ
MAX8883EUTQ5
2.5
1.8
AAPZ
MAX8883EUTGG
3.0
3.0
AAZU
________________________Applications
Hand-Held Instruments
Pin Configurations
PART
TOP MARK
***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
TOP VIEW
OUTB 1
GND 2
6
MAX8882
5
PART
SHUTDOWN
TEMP
RANGE
PINPACKAGE
MAX8882EUT_ _*
Single
-40°C to +85°C
6 SOT23-6
MAX8883EUT_ _*
Dual
-40°C to +85°C
6 SOT23-6
OUTA
IN
*See Selector Guide
BP 3
4
Typical Operating Circuit
SHDN
SOT23-6
OUTA
VIN
2.5V to 6.5V
Pin Configurations continued at end of data sheet.
2.2µF
VOUTA
FIXED
(1.8V to 3.3V)
2.2µF
VOUTB
FIXED
(1.8V to 3.3V)
MAX8882
MAX8883
OUTB
SHDN_
IN
2.2µF
GND
(BP)
0.01µF
( ) ARE FOR MAX8882 ONLY.
________________________________________________________________ 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
MAX8882/MAX8883
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 Pchannel 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 reference 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.
MAX8882/MAX8883
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
ABSOLUTE MAXIMUM RATINGS
IN, SHDN, SHDNA, SHDNB, BP to GND...............-0.3V to +7.0V
OUTA, OUTB to GND ..................................-0.3V to (VIN + 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (TA = +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
(VIN = +3.6V, SHDN = SHDNA = SHDNB = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
Input Voltage
Undervoltage Lockout
Threshold
TYP
2.5
VIN_ rising, hysteresis 40mV typical
2.15
2.25
MAX
UNITS
6.5
V
2.40
V
TA = +25°C, IOUT_ = 1mA
-1
1
Output Voltage Accuracy
IOUT_ = 1mA
-2
2
-3
2
Maximum Output Current
Continuous
IOUT_ = 100µA to 160mA
160
Current Limit
Ground Current
Shutdown Supply Current
SHDN_ Input Threshold
SHDN_ Input Bias Current
Dropout Voltage
(Notes 2, 3)
Line Regulation
Output Voltage Noise
2
mA
160
550
No Load, VIN = 6.5V
165
IOUT_ = 80mA, both LDOs
170
SHDN_ = GND, TA = +25°C
0.01
SHDN_ = GND
0.1
VIH
265
1
1.6
VIL
0.4
SHDN_ = GND or IN, TA = +25°C
0
SHDN_ = GND or IN
100
0.05
IOUT_ = 1mA
1
IOUT_ = 40mA
36
IOUT_ = 80mA
72
144
0
0.2
VIN = (VOUT_ + 0.4V or 2.5V) to + 6.5V,
IOUT_ = 1mA
-0.2
%
10Hz to 100kHz, CBP = 0.01µF, COUT_ = 4.7µF,
IOUT_ = 1mA
MAX8882
40
10Hz to 100kHz, COUT_ = 4.7µF, IOUT_ = 10mA
MAX8883
320
_______________________________________________________________________________________
mA
µA
µA
V
nA
mV
%/V
µVRMS
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
(VIN = +3.6V, SHDN = SHDNA = SHDNB = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
100Hz, CBP = 0.01µF, COUT_ = 4.7µF
MAX8882
62
100Hz, COUT_ = 4.7µF
MAX8883
60
MAX
UNITS
Output Voltage AC PSRR
dB
Thermal Shutdown
Temperature
160
°C
Thermal Shutdown
Hysteresis
10
°C
Note 1: All units are 100% production tested at TA = +25°C. Limits over the operating temperature range are
guaranteed by design.
Note 2: The dropout voltage is defined as VIN - VOUT when VIN = VOUT (NOM). Specification only applies when VOUT ≥ 2.5V.
Note 3: See the Typical Operating Characteristics for guaranteed specifications at voltages other than 3.3V.
Typical Operating Characteristics
(VOUT_ = 2.85V, IOUT_ = 80mA, VIN = +3.6V, COUT_ = 2.2µF, CBP = 0.01µF, and CIN = 2.2µF, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. LOAD CURRENT
NO LOAD
100
50
0
140
120
100
80
60
1
2
3
4
5
100
80
60
40
20
20
0
0
10
20
30
40
50
60
70
80
-40
-15
10
35
60
85
LOAD CURRENT (mA)
TEMPERATURE (°C)
DROPOUT VOLTAGE
vs. LOAD CURRENT
DROPOUT vs. VOUT
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
DROPOUT (mV)
45
TA = -40°C
GUARANTEED MAXIMUM
120
100
80
MEAN
60
15
20
30
40
50
LOAD CURRENT (mA)
60
70
80
0.8
0.6
0.4
0.2
0
-0.2
-0.4
40
-0.6
20
-0.8
0
0
1.0
MAX8882/83 toc06
160
140
TA = +85°C
30
180
OUTPUT VOLTAGE (%)
60
200
MAX8882/3 toc04
TA = +25°C
75
10
120
SUPPLY VOLTAGE (V)
90
0
80mA LOAD, BOTH OUTPUTS
140
40
6
MAX8882/3 toc03
160
0
0
DROPOUT VOLTAGE (mV)
BOTH OUTPUTS LOADED
180
SUPPLY CURRENT (µA)
150
MAX8882/3 toc02
160
200
MAX8882/83 toc05
SUPPLY CURRENT (µA)
180
SUPPLY CURRENT (µA)
80mA LOAD, BOTH OUTPUTS
200
200
MAX8882/3 toc01
250
SUPPLY CURRENT
vs. TEMPERATURE
-1.0
2.5
2.7
2.9
VOUT (V)
3.1
3.3
-40
-25
-10
5
20
35
50
65
80
TEMPERATURE (°C)
_______________________________________________________________________________________
3
MAX8882/MAX8883
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VOUT_ = 2.85V, IOUT_ = 80mA, VIN = +3.6V, COUT_ = 2.2µF, CBP = 0.01µF, and CIN = 2.2µF, unless otherwise noted.)
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY
60
40
30
20
10
0
100Ω LOAD
100
80
60
THERMAL
COUPLING
40
CAPACITVE
COUPLING
20
0
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
100
FREQUENCY (kHz)
FREQUENCY (kHz)
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
MAX8882 OUTPUT NOISE
(10Hz to 100kHz)
MAX8882/3 toc09
10000
1000
MAX8882/3 toc10
PSRR (dB)
50
120
MAX8882/3 toc08
100Ω LOAD
CHANNEL-TO-CHANNEL ISOLATION (dB)
70
MAX8882/3 toc07
PSRR vs. FREQUENCY
NOISE DENSITY (nV/√Hz)
MAX8882/MAX8883
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
1000
500µV/div
(AC-COUPLED)
VOUT_
100
10
0.01
0.1
1
10
100
1000
1ms/div
LOAD TRANSIENT
(VIN = 3.35V, ILOAD = 0 TO 80mA)
LINE TRANSIENT
MAX8882/3 toc11
MAX8882/3 toc12
4.5V
VIN
3.5V
20mV/div
(AC-COUPLED)
VOUT_
1V/div
20mV/div
(AC-COUPLED)
VOUT_
50mA/div
ILOAD
0
50µs/div
4
10µs/div
_______________________________________________________________________________________
Dual, Low-Noise, Low-Dropout, 160mA Linear
Regulators in SOT23
LOAD TRANSIENT NEAR DROPOUT
SHUTDOWN RESPONSE
MAX8882/3 toc13
MAX8882/3 toc14
RLOAD = 100Ω
20mV/div
VOUT
OUTPUT
VOLTAGE
20V/div
0
VIN = VOUT + 0.1V
50µA/div
ILOAD
0
SHUTDOWN
VOLTAGE
1V/div
0
10µs/div
1ms/div
Pin Description
PIN
NAME
FUNCTION
1
OUTB
Regulator B Output. Sources up to 160mA continuous current. Bypass with a
2.2µF (