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MAX8881EUT25+MAXIMN/a1500avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT25+TMAXIMN/a1975avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT33+MAXIMN/a1500avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8880ETTMAXIMN/a2500avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8880ETT+MAXIMN/a1500avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8880ETT+T |MAX8880ETTTMAXIMN/a606avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8880EUT+T |MAX8880EUTTMAXIMN/a2500avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT18+T |MAX8881EUT18TMAXIN/a15avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT33+T |MAX8881EUT33TMAXIMN/a23190avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT50+ |MAX8881EUT50MAXN/a29avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT50+T |MAX8881EUT50TMAXN/a1000avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881EUT50+T |MAX8881EUT50TMAXIMN/a700avai12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK


MAX8881EUT33+T ,12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POKELECTRICAL CHARACTERISTICS(V = V + 1V, SHDN = IN, C = 4.7µF, T = -40°C to +85°C, unless otherwise n ..
MAX8881EUT50+ ,12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POKELECTRICAL CHARACTERISTICS(V = V + 1V, SHDN = IN, C = 4.7µF, T = -40°C to +85°C, unless otherwise n ..
MAX8881EUT50+T ,12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POKapplications where reverse battery protection and long♦ 2.5V to 12V Input Voltage Rangebattery life ..
MAX8881EUT50+T ,12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POKapplications where reverse battery protection and long♦ 2.5V to 12V Input Voltage Rangebattery life ..
MAX8881EUT50-T ,12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POKApplicationsSmoke Detectors PDAs Handy TerminalsBattery-Powered AlarmsCMOS Backup PowerRemote Trans ..
MAX8882EUTA5+T ,Dual, Low-Noise, Low-Dropout, 160mA Linear Regulators in SOT23features include short-circuit protection(MAX8883)and thermal-shutdown protection. The MAX8882 has ..
MB87L2250 ,MPEG2 Transport / Video and Audio Decoder with integrated 32-Bit RISC CPUapplications. MPEG decoding and transport demultiplexing are imple-mented in hardware. The on-chip ..
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MB88101A ,A/D Converter (With 4-channel Input at 12-bit Resolution)FEATURES• 4-channel analog input• One analog input channel selectable for conversion by external co ..
MB88101A ,A/D Converter (With 4-channel Input at 12-bit Resolution)FUJITSU SEMICONDUCTORDS04-13105-2EDATA SHEETLinear IC ConverterCMOSA/D Converter(With 4-channel I ..
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MAX8880ETT-MAX8880ETT+-MAX8880ETT+T-MAX8880EUT+T-MAX8881EUT18+T-MAX8881EUT25+-MAX8881EUT25+T-MAX8881EUT33+-MAX8881EUT33+T-MAX8881EUT50+-MAX8881EUT50+T
12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
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 2ΩPMOS 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 12VReverse Battery Protection2.5V to 12V Input Voltage Range±1.5% Output Voltage Accuracy200mA max Output Current2ΩPMOS Output DeviceShort-Circuit and Thermal Overload ProtectionPOK Output for Out-of-Regulation IndicatorFixed 1.8V, 2.5V, 3.3V, and 5V (MAX8881)
Adjustable from 1.25V to 5V (MAX8880)
Tiny 6-Pin SOT23 PackageThin 6-Pin TDFN Package
MAX8880/MAX8881
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK

GNDOUTPOK
MAX8880
MAX8881MAX8880
SOT23-6

TOP VIEW
SHDN
POKIN
GNDOUT354
TDFN3mm x 3mm

SHDN
Pin Configurations
OUT
GND
4.7μF1μF
OFFSHDN
VIN
2.5V TO 12V
REGULATION OK
VOUT
1.25V TO 5V
UP TO 200mA
POK
MAX8881
Typical Operating Circuit
________________________Applications

19-1679; Rev 2; 12/07
Ordering Information
PARTOUTPUTTEMP RANGEPIN-PACKAGETOP MARK
MAX8880EUT-T
Adjustable-40°C to +85°C6 SOT23-6AAHR
MAX8880ETT-TAdjustable-40°C to +85°C6 TDFNAGS
MAX8881EUT18-T
1.8V-40°C to +85°C6 SOT23-6AAHS
MAX8881EUT25-T2.5V-40°C to +85°C6 SOT23-6AAHT
MAX8881EUT33-T3.3V-40°C to +85°C6 SOT23-6AAHU
MAX8881EUT50-T5.0V-40°C to +85°C6 SOT23-6AAHV
Smoke Detectors
Battery-Powered Alarms
Remote Transmitters
Smart Battery Packs
PDAs
Handy Terminals
CMOS Backup Power
Real-Time Clocks
MAX8880/MAX8881
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VIN= VOUT + 1V, SHDN= IN, COUT= 4.7µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +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
SHDNto GND.............................................-0.3V to (VIN+ 0.3V),
-0.3V to +0.3V when VIN< 0V
OUT, FB to GND...............................-0.3V to +6V when VIN> 5.7V,
-0.3V to (VIN + 0.3V) when 0V ≤VIN≤5.7V,
-0.3V to +0.3V when VIN < 0V
POK to GND...........................................................-0.3V to +14V
OUT Continuous Current...................................................200mA
OUT Short Circuit...........................................................Indefinite
Continuous Power Dissipation (TA= +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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

Input Voltage RangeVIN2.512V
Supply CurrentIINVIN = 12V3.510μA
Shutdown Supply CurrentIIN(SHDN)V SHDN = 0, VIN = 12V, VOUT = 0, TA = +25°C1.53μA
Input Undervoltage LockoutVUVLO2.12.4V
TA = +25°C1.2381.2571.276
TA = 0°C to +85°C1.2321.282FB Voltage, Adjustable
ModeVFBMAX8880,
IOUT = 20mA
TA = -40°C to +85°C1.2191.295
TA = +25°C-1.51.5
TA = 0°C to +85°C-22OUT Voltage Accuracy
(Note 2)
MAX8881,
IOUT = 20mA
TA = -40°C to +85°C-33
OUT Voltage RangeVOUTMAX88801.255.5V
OUT Line RegulationVIN = VOUT + 1V to 12V0.010.05%/V
OUT Load Regulation (Note 3)IOUT = 10μA to 100mA0.0060.015%/mA
Current Limit (Note 3)IOUT200400mA
Dropout Voltage (Notes 3, 4)ΔVDOIOUT = 50mA100200mV
IN Reverse Leakage CurrentIIN(REV)VIN = -12V, V SHDN = 01mA
Foldback Current LimitIOUT(SC)VIN = 5V, VOUT = 0250mA
VIH2SHDN Input ThresholdVILVIN = 2.5V to 12V0.5V
SHDN Input Bias CurrentV SHDN = 0 to 12V, TA = +25°C-100100nA
FB Input Bias CurrentIFBFB = 1.25V, TA = +25°C, MAX8880 only0220nA
TA = +25°C87.590.593.5Falling
TA = -40°C to +85°C8695POK Trip Threshold
Hysteresis1.5
% of
VOUT
POK Off-CurrentIPOKVPOK = 12V, TA = +25°C100nA
POK Low VoltageVPOKIPOK = 1mA50200mV
MAX8880/MAX8881
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK

SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX8880/1-01
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
IOUT = 30 mA
NO LOAD
SUPPLY CURRENT
vs. TEMPERATURE
MAX8880/1-02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
VOUT = 1.8V
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX8880/1-03
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
0.11011001k10k
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY

MAX8880/1-04
FREQUENCY (Hz)
PSRR (dB)10010k1k100k
FREQUENCY (Hz)
MAX186-14A
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY

NOISE (µV/
Hz)
OUTPUT NOISE
vs. LOAD CURRENT
MAX8880/1-06
LOAD CURRENT (mA)
OUTPUT NOISE (
RMS
VOUT = 1.8V
COUT = 1.0μF
COUT = 4.7μF
Typical Operating Characteristics

(VIN= 5V, VOUT= 3.3V, IOUT= 30mA, COUT= 4.7µF, TA= +25°C, unless otherwise noted. See Figure 1.)
Note 1:
All devices are 100% production tested at TA= +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 VIN> 3V.
Note 4:
The dropout voltage is defined as VIN- VOUT, when VOUTis 100mV below the value of VOUTfor VIN= VOUT+ 1V.
ELECTRICAL CHARACTERISTICS (continued)

(VIN= VOUT + 1V, SHDN= IN, COUT= 4.7µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

Thermal Shutdown ThresholdTTSD(Hysteresis = 15°C)160°C
OUT Noise VOUT(NOISE)f = 10Hz to 100kHz, IOUT = 1mA300μVRMS
CHANGE FROM NOMINAL OUTPUT
VOLTAGE vs. TEMPERATURE
MAX8880/1-10
TEMPERATURE (°C)
CHANGE FROM NOMINALOUTPUT
VOLTAGE (%)
REGION OF STABLE COUT ESR
vs. OUTPUT CURRENT
MAX8880/1-11
OUTPUT CURRENT (mA)
OUT
ESR (150
STABLE REGION
COUT = 10µF
COUT = 4.7µF
200µs/div
LINE-TRANSIENT RESPONSE

MAX8880/1-12
9.75V
CH1 = VIN, 500mV/div, AC COUPLED
CH2 = VOUT, 20mV/div, AC COUPLED
VOUT = 5V, IOUT = 5mA
400µs/div
LOAD-TRANSIENT RESPONSE

MAX8880/1-13
32.5mA
1.25mA
CH1 = IOUT, 12.5mA/div
CH2 = VOUT, 100mV/div, AC COUPLED
VOUT(NOMINAL) = 5V, VIN = 9V
400µs/div
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT

MAX8880/1-14
32.5mA
1.25mA
CH1 = IOUT, 12.5mA/div
CH2 = VOUT, 100mV/div, AC COUPLED
VIN = 5.2V, VOUT(NOMINAL) = 5V
100µs/div
TURN-ON RESPONSE

MAX8880/1-15
1.8V
CH1 = SHDN, 2V/div
CH2 = VOUT, 1V/div
VIN = 4.0V
MAX8880/MAX8881
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK
Typical Operating Characteristics (continued)

(VIN= 5V, VOUT= 3.3V, IOUT= 30mA, COUT= 4.7µF, TA= +25°C, unless otherwise noted. See Figure 1.)
OUTPUT VOLTAGE ERROR
vs. LOAD CURRENT
MAX8880/1-07
LOAD CURRENT (mA)
OUTPUT VOLTAGE ERROR (%)
SUPPLY CURRENT
vs. LOAD CURRENT
MAX8880/1-08
LOAD CURRENT (mA)
SUPPLY CURRENT (10050150200
OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX8880/1-09
INPUT VOLTAGE (V)
OUTPUT VOTLAGE (V)
MAX8880/MAX8881
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK
Detailed Description

The MAX8880/MAX8881 are low-dropout, low-quies-
cent current linear regulators designed primarily for
battery-powered applications (Figure 1). The MAX8880
provides an adjustable output voltage from 1.25V to 5V
using an external resistor-divider. The MAX8881 is
available in factory preset output voltages of 1.8V, 2.5V,
3.3V, and 5V. Both devices have a +1.25V reference,
error amplifier, MOSFET driver, and P-channel pass
transistor (Figure 2).
Low-Dropout Regulator

The 1.25V reference is connected to the error amplifi-
er’s inverting input. The error amplifier compares this
reference with the selected feedback voltage and
amplifies the difference. The MOSFET driver reads the
error signal and applies the appropriate drive to the P-
channel pass transistor. If the feedback voltage is lower
than the reference voltage, the pass-transistor gate is
pulled lower, allowing more current to pass, increasing
the output voltage. If the feedback voltage is higher
than the reference voltage, the pass-transistor gate is
driven higher, allowing less current to pass to the out-
put. The output voltage is fed back through either an
internal resistor voltage divider by externally connect-
ing FB to OUT (MAX8881), or an external resistor net-
work connected to FB (MAX8880). Additional blocks
include an output current limiter, reverse battery pro-
tection, a thermal sensor, shutdown logic, and a POK
comparator to indicate when the output is out of regula-
tion (Figure 2).
Internal P-Channel Pass Transistor

The MAX8880/MAX8881 feature a 2ΩP-channel MOS-
FET pass transistor. This provides advantages over
similar designs using PNP pass transistors, including
longer battery life. The P-channel MOSFET requires no
base drive, which reduces quiescent current consider-
ably. PNP-based regulators waste considerable current
in dropout when the pass transistor saturates. They
also use high base-drive currents under large loads.
The MAX8880/MAX8881 do not suffer from these prob-
lems and consume only 3.5µA of supply current (see
Typical Operating Characteristics).
Dropout Voltage

A regulator’s minimum input-output differential (or
dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines
the useful end-of-life battery voltage. Because the
MAX8880/MAX8881 use a P-channel MOSFET pass
transistor, their dropout voltage is RDS(ON)(2Ω) multi-
plied by the load current (see Electrical Characteristics).
R2*
100k
OUT
GND
4.7μF
1μF
SHDN
2.5V TO 12V
REGULATION OK
POK
MAX8881
VIN
VOUT
*OPTIONAL
Figure 1. Standard Application Circuit
PIN
MAX888_ (SOT)MAX888_ (TDFN)NAMEFUNCTION
4INInput Voltage. Bypass with a 1µF capacitor to GND.2GNDGround3OUTOutput Voltage. Bypass with a 4.7µF capacitor (<0.5Ω ESR) to GND for load
currents up to 200mA. For load currents up to 40mA, 1µF is acceptable.FBFeedback Set Point, 1.25V (MAX8880 only). Output sense, connect to OUT
externally (MAX8881 only).5SHDN
ON/OFF Control. Regulator is ON when V SHDN > 2V. If unused, connect to
IN. If reverse battery protection of the SHDN input is desired, connect a
100kΩ resistor in series with SHDN.6POKPOK Output, Open Drain. Low when OUT is out of regulation or in shutdown.
Connect POK to OUT through a high-value resistor for a simple error—EPExposed paddle (TDFN only). Connect to the circuit ground plane.
Pin Description
MAX8880/MAX8881
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK
Reverse Battery Protection

The MAX8880/MAX8881 have a unique protection
scheme that limits the reverse supply current to less
than 1mA when VINis forced below ground. The circuit
monitors the polarity of IN, disconnecting the internal
circuitry and parasitic diodes when the battery is
reversed. This feature prevents the device from electri-
cal stress and damage when the battery is connected
backwards. If reverse battery protection is needed,
drive SHDNthrough a 100kΩresistor.
Current Limiting

The MAX8880/MAX8881 include a current limiter. When
the output is shorted to ground, drive to the output
PMOS is limited. The output can be shorted to ground
without damage to the part.
Thermal Overload Protection

Thermal overload protection limits total power dissipa-
tion in the MAX8880/MAX8881. When the internal junc-
tion temperature exceeds TJ= +160°C, the thermal
sensor signals the shutdown logic, turning off the pass
transistor and allowing the IC to cool. The thermal sen-
sor turns the pass transistor on again after the IC’s
junction temperature cools by 15°C, resulting in a
pulsed output during continuous thermal-overload con-
ditions.
Thermal-overload protection is designed to protect the
MAX8880/MAX8881 in the event of fault conditions. For
continuous operation, do not exceed the absolute maxi-
mum junction temperature rating of TJ(MAX)= +150°C.
Operating Region and Power Dissipation

The MAX8880/MAX8881’s maximum power dissipation
depends on the thermal resistance of the case and cir-
cuit board, the temperature difference between the die
junction and ambient air, and the rate of airflow. The
power dissipation in the device is P = IOUT(VIN-
VOUT). The maximum power dissipation allowed is:OUT
GND
4.7μF
1μF
SHDN
2.5V TO 12V
UP TO 200mAREGULATION OKPOK
MAX8880
VINVOUT
1.25V TO 5.5V
Figure 3. Adjustable Output Using External Feedback Resistors
SHUTDOWN
LOGIC
ERROR
AMP
1.25V
REF
91%
REF
OUT
POK
GND
SHDN
MAX8881
THERMAL
SENSOR
REVERSE
BATTERY
PROTECTION
MOS DRIVER
WITH ILIMIT
POK
Figure 2. Functional Diagram
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