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MAX8881EUT33-T

P1-P3P4-P6P7-P9P10-P12
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
General Description
The MAX8880/MAX8881 are ultra-low supply current,
low-dropout linear regulators, capable of delivering up
to 200mA. They are designed for battery-powered
applications where reverse battery protection and long
battery life are critical.
These regulators’ low 3.5µA supply current extends bat-
tery life in applications with long standby periods. Unlike
PNP-based designs, a 2Ω PMOS device maintains ultra-
low supply current throughout the entire operating range
and in dropout. The parts are internally protected from
output short circuits, reverse battery connection, and
thermal overload. An internal power-OK (POK) com-
parator indicates when the output is out of regulation.
The MAX8880 output is adjustable from 1.25V to 5V
using an external resistor-divider. The MAX8881 pro-
vides only factory-preset output voltages of 1.8V, 2.5V,
3.3V, or 5V (see Ordering Information). The devices are
available in 6-pin SOT23 and 6-pin TDFN packages.
Features
♦ 3.5µA Supply Current at 12V
♦ Reverse Battery Protection
♦ 2.5V to 12V Input Voltage Range
♦ ±1.5% Output Voltage Accuracy
♦ 200mA max Output Current
♦ 2Ω PMOS Output Device
♦ Short-Circuit and Thermal Overload Protection
♦ POK Output for Out-of-Regulation Indicator
♦ Fixed 1.8V, 2.5V, 3.3V, and 5V (MAX8881)
Adjustable from 1.25V to 5V (MAX8880)
♦ Tiny 6-Pin SOT23 Package
♦ Thin 6-Pin TDFN Package
MAX8880/MAX8881
12V, Ultra-Low-I
Q
, Low-Dropout
Linear Regulators with POK
________________________________________________________________ Maxim Integrated Products 1
GND
FBOUT
16POK
5
IN
MAX8880
MAX8881
MAX8880
SOT23-6
TOP VIEW
2
34
SHDN
POK IN
1
GND OUT
2 3
6 5 4
FB
TDFN
3mm x 3mm
SHDN
Pin Configurations
IN
OUT
FB
GND
4.7μF1μF
ON
OFF
SHDN
V
IN
2.5V TO 12V
REGULATION OK
V
OUT
1.25V TO 5V
UP TO 200mA
POK
MAX8881
Typical Operating Circuit
________________________Applications
19-1679; Rev 2; 12/07
Ordering Information
PART OUTPUT TEMP RANGE PIN-PACKAGE TOP MARK
MAX8880EUT-T Adjustable -40°C to +85°C 6 SOT23-6 AAHR
MAX8880ETT-T Adjustable -40°C to +85°C 6 TDFN AGS
MAX8881EUT18-T 1.8V -40°C to +85°C 6 SOT23-6 AAHS
MAX8881EUT25-T 2.5V -40°C to +85°C 6 SOT23-6 AAHT
MAX8881EUT33-T 3.3V -40°C to +85°C 6 SOT23-6 AAHU
MAX8881EUT50-T 5.0V -40°C to +85°C 6 SOT23-6 AAHV
Smoke Detectors
Battery-Powered Alarms
Remote Transmitters
Smart Battery Packs
PDAs
Handy Terminals
CMOS Backup Power
Real-Time Clocks
MAX8880/MAX8881
12V, Ultra-Low-I
Q
, Low-Dropout
Linear Regulators with POK
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT
+ 1V, SHDN = IN, C
OUT
= 4.7µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
IN to GND ................................................................-14V to +14V
SHDN to GND.............................................-0.3V to (V
IN
+ 0.3V),
-0.3V to +0.3V when V
IN
< 0V
OUT, FB to GND...............................-0.3V to +6V when V
IN
> 5.7V,
-0.3V to (V
IN
+ 0.3V) when 0V ≤ V
IN
≤ 5.7V,
-0.3V to +0.3V when V
IN
< 0V
POK to GND ...........................................................-0.3V to +14V
OUT Continuous Current...................................................200mA
OUT Short Circuit...........................................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)...........696mW
6-Pin TDFN (derate 24.4mW/°C above +70°C) ........1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature.........................................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
Input Voltage Range V
IN
2.5 12 V
Supply Current I
IN
V
IN
= 12V 3.5 10 μA
Shutdown Supply Current
I
IN
(
SHDN
)
V
SHDN
= 0, V
IN
= 12V, V
OUT
= 0, T
A
= +25°C
1.5 3 μA
Input Undervoltage Lockout V
UVLO
2.1 2.4 V
T
A
= +25°C
1.238 1.257 1.276
T
A
= 0°C to +85°C
1.232 1.282
FB Voltage, Adjustable
Mode
V
FB
MAX8880,
I
OUT
= 20mA
T
A
= -40°C to +85°C 1.219 1.295
V
T
A
= +25°C
-1.5
1.5
T
A
= 0°C to +85°C -2 2
OUT Voltage Accuracy
(Note 2)
MAX8881,
I
OUT
= 20mA
T
A
= -40°C to +85°C
-3 3
%
OUT Voltage Range V
OUT
MAX8880
1.25
5.5 V
OUT Line Regulation V
IN
= V
OUT
+ 1V to 12V
0.01 0.05
%/V
OUT Load Regulation (Note 3)
I
OUT
= 10μA to 100mA
0.006 0.015
%/mA
Current Limit (Note 3) I
OUT
200 400
mA
Dropout Voltage (Notes 3, 4) ΔV
DO
I
OUT
= 50mA
100 200
mV
IN Reverse Leakage Current I
IN(REV)
V
IN
= -12V, V
SHDN
= 0 1mA
Foldback Current Limit
I
OUT
(
SC
)
V
IN
= 5V, V
OUT
= 0
250
mA
V
IH
2
SHDN Input Threshold
V
IL
V
IN
= 2.5V to 12V
0.5
V
SHDN Input Bias Current V
SHDN
= 0 to 12V, T
A
= +25°C
-100 100
nA
FB Input Bias Current I
FB
FB = 1.25V, T
A
= +25°C, MAX8880 only 0 2 20 nA
T
A
= +25°C
87.5 90.5 93.5
Falling
T
A
= -40°C to +85°C
86 95
POK Trip Threshold
Hysteresis 1.5
% of
V
OUT
POK Off-Current I
POK
V
POK
= 12V, T
A
= +25°C
100
nA
POK Low Voltage V
POK
I
POK
= 1mA 50
200
mV
MAX8880/MAX8881
12V, Ultra-Low-I
Q
, Low-Dropout
Linear Regulators with POK
_______________________________________________________________________________________ 3
0
1.0
0.5
2.5
2.0
1.5
4.0
3.5
3.0
4.5
042681012
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX8880/1-01
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
I
OUT
= 30 mA
NO LOAD
0
1.5
1.0
0.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
MAX8880/1-02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
OUT
= 1.8V
0
150
100
50
200
250
300
350
400
450
500
0 50 100 150 200
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX8880/1-03
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
70
60
50
40
30
20
10
0.1 101 100 1k 10k
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX8880/1-04
FREQUENCY (Hz)
PSRR (dB)
10 100 10k1k 100k
FREQUENCY (Hz)
10
1
0.01
0.10
MAX186-14A
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
NOISE (µV/√Hz)
0
50
100
150
200
250
300
350
400
0 20406080100
OUTPUT NOISE
vs. LOAD CURRENT
MAX8880/1-06
LOAD CURRENT (mA)
OUTPUT NOISE (μV
RMS
)
V
OUT
= 1.8V
C
OUT
= 1.0μF
C
OUT
= 4.7μF
Typical Operating Characteristics
(V
IN
= 5V, V
OUT
= 3.3V, I
OUT
= 30mA, C
OUT
= 4.7µF, T
A
= +25°C, unless otherwise noted. See Figure 1.)
Note 1: All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2: Output accuracy with respect to nominal preset voltages. FB = OUT.
Note 3: This specification is valid for V
IN
> 3V.
Note 4: The dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 1V.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT
+ 1V, SHDN = IN, C
OUT
= 4.7µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
Thermal Shutdown Threshold T
TSD
(Hysteresis = 15°C)
160
°C
OUT Noise
V
OUT
(
NOISE
)
f = 10Hz to 100kHz, I
OUT
= 1mA
300
μV
RMS
P1-P3P4-P6P7-P9P10-P12

MAX8881EUT33-T

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Buy MAX8881EUT33-T
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 12V Linear Regulato
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