MAX8841ELT33T [MAXIM]
Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in μDFN;
| 型号： | MAX8841ELT33T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in μDFN |
| 文件： | 总10页 (文件大小：343K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0629; Rev 0; 10/06
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
General Description
Features
♦ Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN
The MAX8840/MAX8841/MAX8842 ultra-low-noise, low-
dropout (LDO) linear regulators are designed to deliver
up to 150mA continuous output current. These regula-
tors achieve a low 120mV dropout for 120mA load cur-
rent. The MAX8840 uses an advanced architecture to
♦ 11µV
Output Noise at 100Hz to 100kHz
RMS
Bandwidth (MAX8840)
♦ 78dB PSRR at 1kHz (MAX8840)
♦ 120mV Dropout at 120mA Load
achieve ultra-low output voltage noise of 11µV
PSRR of 54dB at 100kHz.
and
RMS
♦ Stable with 1µF Ceramic Capacitor for Any Load
♦ Guaranteed 150mA Output
♦ Only Need Input and Output Capacitors (MAX8841)
♦ Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V,
2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and
Adjustable (MAX8842)
The MAX8841 does not require a bypass capacitor,
hence achieving the smallest PC board area. The
MAX8842 output voltage can be adjusted with an exter-
nal divider.
The MAX8840/MAX8841 are preset to a variety of volt-
ages in the 1.5V to 4.5V range. Designed with a p-channel
MOSFET series pass transistor, the MAX8840/MAX8841/
MAX8842 maintain very low ground current (40µA).
♦ Low 40µA Ground Current
♦ Excellent Load/Line Transient
♦ Overcurrent and Thermal Protection
The regulators are designed and optimized to work with
low-value, low-cost ceramic capacitors. The MAX8840
requires only 1µF (typ) of output capacitance for stability
with any load. When disabled, current consumption drops
to below 1µA.
Ordering Information
PART*
TEMP RANGE
PIN-PACKAGE
The MAX8840/MAX8841/MAX8842 are available in a tiny
1mm x 1.5mm x 0.8mm µDFN.
6 µDFN-6
1.5mm x 1.0mm
MAX8840ELTxy+T
-40°C to +85°C
6 µDFN-6
1.5mm x 1.0mm
Applications
Cellular and Cordless Phones
PDA and Palmtop Computers
Base Stations
MAX8841ELTxy+T**
MAX8842ELT+T**
-40°C to +85°C
-40°C to +85°C
6 µDFN-6
1.5mm x 1.0mm
*xy is the output voltage code (see the Output Voltage Selector
Guide). Other versions between 1.5V and 4.5V are available in
100mV increments. Contact factory for other versions.
Bluetooth Portable Radios and Accessories
Wireless LANs
Digital Cameras
Personal Stereos
**Future product—contact factory for availability.
+Denotes lead-free package.
Portable and Battery-Powered Equipment
Output Voltage Selector Guide appears at end of data sheet.
Typical Operating Circuits
Pin Configuration
TOP VIEW
INPUT
2V TO 6V
OUTPUT PRESET
1 5V TO 4 5V
IN
OUT
BP
OUT
N.C.
1
2
3
6
5
4
IN
GND
C
BP
10nF
C
IN
MAX8840
1μF
MAX8840
MAX8841
MAX8842
ON
SHDN
C
1μF
OUT
OFF
GND
BP (MAX8840)
N.C. (MAX8841)
FB (MAX8842)
SHDN
μDFN
(1.5mm x 1.0mm)
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________ 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.
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
ABSOLUTE MAXIMUM RATINGS
IN to GND.................................................................-0.3V to +7V
Output Short-Circuit Duration ............................................Infinite
OUT, SHDN to GND ......................................-0.3V to (IN + 0.3V)
FB, BP, N.C. to GND..................................-0.3V to (OUT + 0.3V)
θ
..................................................................................477°C/W
JA
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
Continuous Power Dissipation (T = +70°C)
A
6-Pin µDFN (derate 2.1mW/°C above +70°C) .............0.168W
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 = V
+ 0.5V, T = -40°C to +85°C, unless otherwise noted. C = 1µF, C
= 1µF, C = 10nF. Typical values are at +25°C;
OUT BP
IN
OUT
A
IN
the MAX8842 is tested with 2.45V output, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
2
TYP
MAX UNITS
Input Voltage Range
V
6
V
IN
I
I
I
= 1mA, T = +25°C
-1
+1
+2
+3
OUT
OUT
OUT
A
Output Voltage Accuracy
= 100µA to 80mA, T = +25°C
A
-2
%
= 100µA to 80mA
-3
Maximum Output Current
Current Limit
I
150
150
mA
mA
OUT
I
OUT = 90% of nominal value
200
80
300
170
LIM
V
V
≥ 3V, I
≥ 3V, I
= 80mA
OUT
OUT
OUT
OUT
= 120mA
120
90
2.5V ≤ V
2.5V ≤ V
< 3V, I
< 3V, I
= 80mA
= 120mA
= 80mA
= 120mA
200
250
OUT
OUT
OUT
OUT
OUT
OUT
Dropout Voltage (Note 2)
Ground Current
mV
µA
135
120
180
40
2V ≤ V
2V ≤ V
< 2.5V, I
< 2.5V, I
OUT
OUT
I
= 0.05mA
90
OUT
I
Q
V
V
= V
- 0.1V, I = 0mA
OUT
220
0.001
0.003
0.003
0.05
78
500
IN
IN
OUT(nom)
Line Regulation
Load Regulation
V
V
= (V
+ 0.5V) to 6V, I = 0.1mA
OUT
%/V
LNR
LDR
OUT
I
= 1mA to 80mA
%/mA
OUT
T
T
= +25°C
= +85°C
1
A
Shutdown Supply Current
Ripple Rejection
I
SHDN = 0V
µA
dB
SHDN
A
MAX8840
f = 1kHz, I
= 10mA
OUT
MAX8841/MAX8842
MAX8840
72
75
PSRR
f = 10kHz, I
= 10mA
OUT
MAX8841/MAX8842
MAX8840
65
54
f = 100kHz, I
= 10mA
OUT
MAX8841/ MAX8842
46
2
_______________________________________________________________________________________
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
ELECTRICAL CHARACTERISTICS (continued)
(V = V
+ 0.5V, T = -40°C to +85°C, unless otherwise noted. C = 1µF, C
= 1µF, C = 10nF. Typical values are at +25°C;
OUT BP
IN
OUT
A
IN
the MAX8842 is tested with 2.45V output, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MAX8840
MIN
TYP
11
MAX UNITS
f = 100Hz to 100kHz,
= 10mA
I
LOAD
MAX8841/MAX8842
MAX8840
230
13
Output Noise Voltage
(RMS)
µV
f = 100Hz to 100kHz,
I
= 80mA
LOAD
MAX8841/MAX8842
230
Shutdown Exit Delay
SHDN Logic-Low Level
SHDN Logic-High Level
R
= 50Ω (Note 3)
300
0.4
µs
V
LOAD
V
V
= 2V to 6V
IN
IN
= 2V to 6V
= 6V, SHDN = 0V or
1.5
V
T
A
T
A
T
A
T
A
= +25°C
= +85°C
= +25°C
= +85°C
V
IN
SHDN Input Bias Current
µA
6V
0.01
0.006
0.01
160
0.1
FB Input Bias Current
(MAX8842)
V
= 6V, V = 1.3V
µA
°C
°C
IN
FB
Thermal Shutdown
Thermal-Shutdown
Hysteresis
10
Note 1: Limits are 100% tested at +25°C. Limits over operating temperature range are guaranteed by design.
Note 2: Dropout is defined as V - V when V is 100mV below the value of V for V = V + 0.5V.
IN
OUT
OUT
OUT
IN
OUT
Note 3: Time needed for V
to reach 90% of final value.
OUT
Typical Operating Characteristics
= 1µF, C = 10nF, T = +25°C, unless otherwise noted.)
OUT BP A
(V = V
IN
+ 0.5V, C = 1µF, C
IN
OUT
MAX8840
OUTPUT VOLTAGE ACCURACY
vs. LOAD CURRENT
MAX8840
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
MAX8840
OUTPUT VOLTAGE vs. INPUT VOLTAGE
3.5
3.0
2.5
0 6
0.4
0 2
0
1.0
0.8
I
= 1mA
OUT
I
= 0mA
0.6
OUT
0.4
0.2
2.0
1.5
0
-0.2
-0.4
-0.6
-0.8
-1.0
I
= 150mA
OUT
-0 2
-0.4
-0 6
1.0
0.5
0.0
0
1
2
3
4
5
6
0
25
50
75
100
125
150
-40
-15
10
35
60
85
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
Typical Operating Characteristics (continued)
= 1µF, C = 10nF, T = +25°C, unless otherwise noted.)
OUT BP A
(V = V
IN
+ 0.5V, C = 1µF, C
IN
OUT
MAX8440
MAX8840
DROPOUT VOLTAGE vs. OUTPUT VOLTAGE
MAX8840
DROPOUT VOLTAGE vs. LOAD CURRENT
GROUND PIN CURRENT vs. INPUT VOLTAGE
200
180
160
140
120
100
80
250
200
150
100
50
350
300
250
200
150
100
I
= 80mA
OUT
I
= 150mA
LOAD
T
= +25°C
A
T
= +85°C
A
T
= -40°C
A
I
= 0mA
LOAD
60
40
20
0
50
0
0
0
25
50
75
100
125
150
2.0
2 2
2.4
2.6
2.8
3.0
3.2
0
1
2
3
4
5
INPUT VOLTAGE (V)
OUTPUT (V)
INPUT VOLTAGE (V)
MAX8840
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX8840
MAX8840
GROUND PIN CURRENT vs. LOAD CURRENT
GROUND PIN CURRENT vs. TEMPERATURE
350
300
250
200
150
100
50
50
45
40
35
30
90
80
70
60
50
40
30
20
10
V
= 5.5V
IN
V
IN
= 3.8V
I
C
= 10mA
= 10nF
LOAD
BP
0
0
0
25
50
75
100
125
150
-40
-15
10
35
60
85
0.01
0.1
1
10
100
1000
LOAD CURRENT (mA)
TEMPERATURE (°C)
FREQUENCY (kHz)
MAX8841
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX8840
OUTPUT NOISE-SPECTRAL DENSITY
MAX8840
OUTPUT NOISE
vs. FREQUENCY
MAX8840 toc11
MAX8840 toc12
90
80
10,000
1000
100
V
= 3.8V
= 10mA
IN
I
LOAD
V
= 11μV
NOISE
RMS
70
60
50
20μV/div
40
30
20
10
0
I
= 10mA
0.1
LOAD
10
0 01
400μs/div
0 01
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
4
_______________________________________________________________________________________
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
Typical Operating Characteristics (continued)
= 1µF, C = 10nF, T = +25°C, unless otherwise noted.)
OUT BP A
(V = V
IN
+ 0.5V, C = 1µF, C
IN
OUT
MAX8840
MAX8840
OUTPUT NOISE vs. BP CAPACITANCE
MAX8840
LOAD-TRANSIENT RESPONSE
LOAD-TRANSIENT RESPONSE NEAR DROPOUT
MAX8840 toc15
MAX8840 toc14
25
20
V = 3.1V
IN
I = 0 TO 50mA
LOAD
V
= 3 5V
= 0 TO 50mA
IN
I
LOAD
15
10
5
V
V
OUT
OUT
10mV/div
10mV/div
0
1ms/div
1ms/div
1
10
100
BP CAPACITANCE (nF)
MAX8840
EXITING SHUTDOWN WAVEFORM
MAX8840
LINE-TRANSIENT RESPONSE
MAX8840
ENTERING SHUTDOWN DELAY
MAX8840 toc17
MAX8840 toc16
MAX8840 toc18
V
R
= 2.85V
C
= 0.01μF
OUT
BP
V
= 3.5V TO 4V
IN
= 47Ω
LOAD
SHUTDOWN
VOLTAGE
SHUTDOWN
VOLTAGE
OUTPUT
VOLTAGE
2V/div
OUTPUT
VOLTAGE
2V/div
V
OUT
2mV/div
20μs/div
200μs/div
40μs/div
MAX8840
REGION OF STABLE C
MAX8840
SHUTDOWN EXIT DELAY
ESR
OUT
vs. LOAD CURRENT
MAX8840 toc19
100
V
= 3V
OUT
C
= 100nF
BP
V
OUT
1V/div
10
1
SHUTDOWN
VOLTAGE
0.1
0.01
20μs/div
0
25
50
75
100
125
150
LOAD CURRENT (mA)
_______________________________________________________________________________________
5
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
Pin Description
PIN
NAME
FUNCTION
MAX8840
MAX8841
MAX8842
1
2
3
1
2
3
1
2
3
IN
Unregulated Input Supply
Ground
GND
SHDN
Shutdown. Pull low to disable the regulator.
Noise Bypass for Low-Noise Operation. Connect a 10nF capacitor
from BP to OUT. It is shorted to OUT in shutdown mode.
4
—
—
BP
—
5
—
4
5
FB
Adjustable Output Feedback Point
4, 5
N.C.
No Connection. Not internally connected.
Regulated Output Voltage. Bypass with a capacitor to GND. See the
Capacitor Selection and Regulator Stability section.
6
6
6
OUT
reduces quiescent current. PNP-based regulators waste
considerable current in dropout when the pass transis-
tor saturates. They also use high base-drive current
under heavy loads. The MAX8840/MAX8841/MAX8842
do not suffer from these problems and consume only
40µA of quiescent current in light load and 220µA in
dropout (see the Typical Operating Characteristics).
Detailed Description
The MAX8840/MAX8841/MAX8842 are ultra-low-noise,
low-dropout, low-quiescent current linear regulators
designed for space-restricted applications. The parts
are available with preset output voltages ranging from
1.5V to 4.5V. These devices can supply loads up to
150mA. As shown in the Functional Diagram, the
MAX8840/MAX8841 consist of an innovative bandgap
core and noise bypass circuit, error amplifier, p-chan-
nel pass transistor, and internal feedback voltage-
divider. The MAX8842 allows for adjustable output with
an external feedback network.
Output Voltage Selection
The MAX8840/MAX8841 are supplied with factory-set
output voltages from 1.5V to 4.5V, in 100mV increments
(see the Ordering Information). The MAX8842 features
a user-adjustable output through an external feedback
network (see the Typical Operating Circuits).
The 1.225V bandgap reference is connected to the
error amplifier’s inverting input. The error amplifier com-
pares this reference with the feedback voltage and
amplifies the difference. If the feedback voltage is
lower than the reference voltage, the pass-transistor
gate is pulled low. This allows more current to pass to
the output and increases the output voltage. If the feed-
back voltage is too high, the pass transistor gate is
pulled high, allowing less current to pass to the output.
The output voltage is fed back through an internal resis-
tor voltage-divider connected to the OUT pin.
To set the output of the MAX8842, use the following
equation:
V
V
⎛
⎞
⎠
OUT
R1 = R2 X
-1
⎟
⎜
⎝
REF
where R2 is chosen to be less than 240kΩ and V
=
REF
1.225V. Use 1% or better resistors.
Shutdown
The MAX8840/MAX8841/MAX8842 feature a low-power
shutdown mode that reduces quiescent current less
than 1µA. Driving SHDN low disables the voltage refer-
ence, error amplifier, gate-drive circuitry, and pass
transistor (see the Functional Diagram), and the device
output enters a high-impedance state. Connect SHDN
to IN for normal operation.
An external bypass capacitor connected to BP
(MAX8840) reduces noise at the output. Additional
blocks include a current limiter, thermal sensor, and
shutdown logic.
Internal p-Channel Pass Transistor
The MAX8840/MAX8841/MAX8842 feature a 1Ω (typ)
p-channel MOSFET pass transistor. This provides seve-
ral advantages over similar designs using a pnp pass
transistor, including longer battery life. The p-channel
MOSFET requires no base drive, which considerably
Current Limit
The MAX8840/MAX8841/MAX8842 include a current
limiter, which monitors and controls the pass transis-
tor’s gate voltage, limiting the output current to 200mA.
6
_______________________________________________________________________________________
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
For design purposes, consider the current limit to be
Applications Information
150mA (min) to 300mA (max). The output can be shorted
to ground for an indefinite amount of time without dam-
aging the part.
Capacitor Selection
and Regulator Stability
Use a 1µF capacitor on the MAX8840/MAX8841/
MAX8842 input and a 1µF capacitor on the output.
Larger input capacitor values and lower ESRs provide
better noise rejection and line-transient response.
Reduce output noise and improve load-transient
response, stability, and power-supply rejection by
using large output capacitors. Note that some ceramic
dielectrics exhibit large capacitance and ESR variation
with temperature. With dielectrics such as Z5U and
Y5V, it may be necessary to use a 2.2µF or larger output
capacitor to ensure stability at temperatures below
-10°C. With X7R or X5R dielectrics, 1µF is sufficient at all
operating temperatures. A graph of the Region of Stable
Thermal-Overload Protection
Thermal-overload protection limits total power dissipation
in the MAX8840/MAX8841/MAX8842. When the junction
temperature exceeds T = +160°C, the thermal sensor
J
signals the shutdown logic, turning off the pass transistor
and allowing the IC to cool down. The thermal sensor
turns the pass transistor on again after the IC’s junction
temperature drops by 10°C, resulting in a pulsed output
during continuous thermal-overload conditions.
Thermal-overload protection is designed to protect the
MAX8840/MAX8841/MAX8842 in the event of a fault
condition. For continual operation, do not exceed the
absolute maximum junction temperature rating of T =
J
+150°C.
C
ESR vs. Load Current is shown in the Typical
OUT
Operating Characteristics.
Use a 0.01µF bypass capacitor at BP (MAX8840) for
low-output voltage noise. The leakage current going into
the BP pin should be less than 10nA. Increasing the
capacitance slightly decreases the output noise. Values
above 0.1µF and below 0.001µF are not recommended.
Operating Region and Power Dissipation
The MAX8840/MAX8841/MAX8842 maximum power
dissipation depends on the thermal resistance of the
case and circuit board, the temperature difference
between the die junction and ambient, and the rate of
airflow. The power dissipation across the device is:
Noise, PSRR, and Transient Response
The MAX8840/MAX8841/MAX8842 are designed to
deliver ultra-low noise and high PSRR, as well as low
dropout and low quiescent currents in battery-powered
systems. The MAX8840 power-supply rejection is 78dB
at 1kHz and 54dB at 100kHz. The MAX8841/MAX8842
PSRR is 72dB at 1kHz and 46dB at 100kHz (see the
Power-Supply Rejection Ratio vs. Frequency graph in
the Typical Operating Characteristics).
P = I (V - V
OUT IN
)
OUT
The maximum power dissipation is:
= (T - T ) / (θ + θ )
CA
P
MAX
J
A
JC
where T - T is the temperature difference between
J
A
the MAX8840/MAX8841/MAX8842 die junction and the
surrounding air, θ is the thermal resistance of the
JC
package, and θ
is the thermal resistance through the
CA
PC board, copper traces, and other materials to the
surrounding air.
When operating from sources other than batteries,
improved supply-noise rejection and transient response
can be achieved by increasing the values of the input
and output bypass capacitors, and through passive fil-
tering techniques. The Typical Operating Characteristics
show the MAX8840/MAX8841/MAX8842 line- and load-
transient responses.
The GND pin of the MAX8840/MAX8841/MAX8842 per-
forms the dual function of providing an electrical con-
nection to ground and channeling heat away. Connect
the GND pin to ground using a large pad or ground
plane.
Dropout Voltage
A regulator’s minimum dropout voltage determines the
lowest usable supply voltage. In battery-powered sys-
tems, this determines the useful end-of-life battery volt-
age. Because the MAX8840/MAX8841/MAX8842 use a
p-channel MOSFET pass transistor, their dropout voltage
Noise Reduction
For the MAX8840, an external 0.01µF bypass capacitor
between BP and OUT with an innovative noise bypass
scheme reduces output noises dramatically, exhibiting
11µV
of output voltage noise with C
= 0.01µF
BP
RMS
and C
= 1µF. Startup time is minimized by a power-
OUT
is a function of drain-to-source on-resistance (R
)
on circuit that precharges the bypass capacitor.
DS(ON)
multiplied by the load current (see the Typical Ope-
rating Characteristics).
_______________________________________________________________________________________
7
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
Functional Diagram
IN
SHDN
SHUTDOWN AND
POWER-ON CONTROL
ERROR
AMP
MOS DRIVER
P
WITH I
MAX8840
MAX8841
MAX8842
LIMIT
OUT
**
THERMAL
SENSOR
1.225V REFERENCE
AND NOISE BYPASS
FB***
**
GND
*MAX8840 ONLY
**MAX8840/MAX8841 ONLY
***MAX8842 ONLY
BP*
8
_______________________________________________________________________________________
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
Typical Operating
Output Voltage Selector Guide
Circuits (continued)
PART
V
(V)
TOPMARK
MN
MO
LX
OUT
1.6
1.8
1.9
2.5
2.6
2.7
2.8
MAX8840ELT16+T
MAX8840ELT18+T
MAX8840ELT19+T
MAX8840ELT25+T
MAX8840ELT26+T
MAX8840ELT27+T
MAX8840ELT28+T
MAX8840ELT29+T
MAX8840ELT30+T
MAX8840ELT31+T
MAX8840ELT33+T
MAX8841ELT15+T
MAX8841ELT18+T
MAX8841ELT25+T
MAX8841ELT26+T
MAX8841ELT28+T
MAX8841ELT29+T
MAX8841ELT89+T
MAX8841ELT31+T
MAX8841ELT33+T
MAX8841ELT45+T
MAX8842ELT+T
INPUT
2V TO 6V
OUTPUT PRESET
1.5V TO 4.5V
IN
OUT
MP
MK
LU
C
IN
MAX8841
1μF
ON
SHDN
C
OUT
OFF
1μF
LV
2.85
3
LW
LZ
GND
3.1
3.3
1.5
1.8
2.5
2.6
2.8
2.85
2.9
3.1
3.3
4.5
ML
MM
MQ
MR
MS
MT
INPUT
2V TO 6V
OUTPUT ADJUSTABLE
1 5V TO 4 5V
IN
OUT
FB
C
IN
R1
MAX8842
1μF
MU
MV
MW
MX
MY
MZ
ON
SHDN
C
OUT
OFF
1μF
R2
GND
Adjustable
NA
(Note: Standard output voltage options, shown in bold, are
available. Contact the factory for other output voltages between
1.5V and 4.5V. Minimum order quantity is 15,000 units.)
Chip Information
TRANSISTOR COUNT: 284
PROCESS: BiCMOS
_______________________________________________________________________________________
9
Ultra-Low-Noise, High PSRR, Low-Dropout,
150mA Linear Regulators in µDFN
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
TABLE 1
Translation Table for Calendar Year Code
Calendar Year 2005 2006 2007 2008
2009
2010
2011
2012
2013
2014
Legend:
Marked with bar
Blank space - no bar required
TABLE 2
Translation Table for Payweek Binary Coding
Payweek 06-11 12-17 18-23 24-29 30-35
36-41 42-47
48-51 52-05
Legend:
Marked with bar
Blank space - no bar required
I
E
PACKAGE OUTLINE, 6L uDFN, 1.5x1.0x0.8mm
A
ROVA
DOCUMEN CON RO NO
REV
2
21-0147
D
2
-DRAWING NOT TO SCALE-
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2006 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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