MAX8885EUK25 ,150mA, Low-Dropout Linear Regulator with Power-OK OutputApplicationsPCS Phones ModemsPART TEMP. RANGE PIN-PACKAGEMAX8885EUK25 -40°C to +85°C 5 SOT23-5Cellu ..
MAX8885EUK25+ ,150mA, Low-Dropout Linear Regulator with Power OK OutputELECTRICAL CHARACTERISTICS(V = V + 1V, SHDN = I , T = -40°C to +85°C, unless otherwise noted. Typic ..
MAX8885EUK25+T ,150mA, Low-Dropout Linear Regulator with Power OK Outputfeatures a power-OK output that indicates♦ Thermal-Overload and Short-Circuit Protectionwhen the ou ..
MAX8885EUK27 ,150mA, Low-Dropout Linear Regulator with Power-OK OutputELECTRICAL CHARACTERISTICS(V = V + 1V, SHDN = I , T = -40°C to +85°C, unless otherwise noted. Typic ..
MAX8885EUK30+T ,150mA, Low-Dropout Linear Regulator with Power OK OutputApplicationsPCS Phones ModemsPART TEMP. RANGE PIN-PACKAGEMAX8885EUK25 -40°C to +85°C 5 SOT23-5Cellu ..
MAX8885EUK33 ,150mA, Low-Dropout Linear Regulator with Power-OK OutputFeaturesThe MAX8885 low-dropout (LDO) linear regulator operates Optimized for Low-Cost Tantalum Ca ..
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 ..
MB87L2250 ,MPEG2 Transport / Video and Audio Decoder with integrated 32-Bit RISC CPUProduct ProfileOctober 1998Edition 1.1MB87L2250 - MPEG2 Transport, Video andAudio Decoder with inte ..
MB87L2250 ,MPEG2 Transport / Video and Audio Decoder with integrated 32-Bit RISC CPUFEATURES• RISC CPU integrated (32-bit)Pin Assignment • 1 KByte I-Cache• 2.5 Frame Architecture• Onl ..
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 ..
MB88101APF ,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 ..
MAX8885EUK25-MAX8885EUK27-MAX8885EUK33
150mA, Low-Dropout Linear Regulator with Power-OK Output
General DescriptionThe MAX8885 low-dropout (LDO) linear regulator operates
from a +2.5V to +6.5V input voltage range and delivers up
to 150mA. It uses a P-channel MOSFET pass transistor to
allow a low 85µA supply current—which is independent of
the load—as well as LDO voltage. The MAX8885 is opti-
mized to operate with low-cost, high-ESR output capaci-
tors such as small case-size tantalum capacitors. It is ideal
for cost-sensitive portable equipment such as PCS and
cellular phones. For a pin-compatible, functionally equiva-
lent device for use with a low-ESR, ceramic output capaci-
tor, refer to the MAX8875 data sheet.
The MAX8885 features a power-OK output that indicates
when the output is out of regulation, and is available in
preset output voltage versions of 5.0V, 3.3V, 3.0V, 2.7V,
and 2.5V. Other features include 1µA (max) shutdown cur-
rent, short-circuit protection, thermal shutdown protection,
and reverse-battery protection. The MAX8885 is available
in a miniature 5-pin SOT23 package.
ApplicationsPCS PhonesModems
Cellular PhonesHand-Held Instruments
Cordless PhonesPalmtop Computers
PCMCIA CardsElectronic Planners
FeaturesOptimized for Low-Cost Tantalum CapacitorsPin Compatible with MIC5206Undervoltage Power-OK OutputPreset Output Voltages (±1% accuracy)Guaranteed 150mA Output Current85µA No-Load Supply CurrentLow 110mV Dropout at 100mA Load (165mV at
150mA load)Thermal-Overload and Short-Circuit ProtectionReverse-Battery Protection60dB PSRR at 100Hz1µA max Shutdown Current
MAX8885
150mA, Low-Dropout Linear Regulator
with Power-OK Outputypical Operating Circuit19-1576; Rev 0; 10/99
Pin Configuration
Ordering InformationOutput Voltage Selector Guide
MAX8885
150mA, Low-Dropout Linear Regulator
with Power-OK Output
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VIN= VOUT(NOMINAL)+ 1V, SHDN= IN, 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, SHDN, POK to GND...............................................-7V to +7V
SHDNto IN...............................................................-7V to +0.3V
OUT to GND................................................-0.3V to (VIN+ 0.3V)
Output Short-Circuit Duration........................................Indefinite
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........571mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
θJA..................................................................................140°C/W
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX8885
150mA, Low-Dropout Linear Regulator
with Power-OK Output
Note 1:Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed through cor-
relation using Statistical Quality Control (SQC) methods.
Note 2:Dropout voltage is defined as VIN- VOUT, when VOUTis 100mV below the value of VOUTfor VIN= VOUT+ 0.5V.
ELECTRICAL CHARACTERISTICS (continued)(VIN= VOUT(NOMINAL)+ 1V, SHDN= IN, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Typical Operating Characteristics(MAX8885EUK30, VIN= +3.6V, CIN= 1µF, COUT= 4.7µF, SHDN= IN, TA= +25°C, unless otherwise noted.)
150mA, Low-Dropout Linear Regulator
with Power-OK Output
Typical Operating Characteristics (continued)(MAX8885EUK30, VIN= +3.6V, CIN= 1µF, COUT= 4.7µF, SHDN= IN, TA= +25°C, unless otherwise noted.)
150mA, Low-Dropout Linear Regulator
with Power-OK Output100µs/div
LINE-TRANSIENT RESPONSE3.00V
2.98V
3.02V
VIN
VOUT
MAX8885toc13
5µs/div
LOAD-TRANSIENT RESPONSE3.05V
3.0V
50mA
VOUT
25mV/div
ILOAD
25mA/div
MAX8885toc14
100µs/div
SHUTDOWN DELAYVOUT
1V/div
MAX8885toc16
VSHDN
1V/div
200µs/div
POK OUTPUTVPOK
2V/div
VOUT
2V/div
MAX8885toc17
VIN
1V/div
10ms/div
POK STARTUP RESPONSE2.5V
2.5V
2.5V
VPOK
2.5V/div
VOUT
2.5V/div
MAX8885toc18
VIN
2.5V/div
Typical Operating Characteristics (continued)(MAX8885EUK30, VIN= +3.6V, CIN= 1µF, COUT= 4.7µF, SHDN= IN, TA= +25°C, unless otherwise noted.)
MAX8885
MAX8885
150mA, Low-Dropout Linear Regulator
with Power-OK Output
Pin Description
Detailed DescriptionThe MAX8885 is a low-dropout, low-quiescent-current
linear regulator designed primarily for battery-powered
applications using low-cost, high-ESR tantalum capaci-
tors. The device delivers up to 150mA and is available
with preset output voltages of 2.5V, 2.7V, 3.0V, 3.3V, or
5.0V. The MAX8885 consists of a 1.25V reference, error
amplifier, P-channel pass transistor, power-OK compara-
tor, and internal feedback voltage divider (Figure 1).
The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares
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
lower, which allows more current to pass to the output
and increases the output voltage. If the feedback volt-
age is too high, the pass-transistor gate is pulled up,
allowing less current to pass to the output. The output
voltage is fed back through an internal resistor voltage
divider connected to the OUT pin.
Additional blocks include a current limiter, reverse-bat-
tery protection, thermal sensor, and shutdown logic.
Output VoltageThe MAX8885 is supplied with factory-set output volt-
ages of 2.5V, 2.7V, 3.0V, 3.3V, or 5.0V. The part num-
ber’s two-digit suffix identifies the nominal output
voltage. For example, the MAX8885EUK33 indicates a
preset output voltage of 3.3V (see Output Voltage
Selector Guide).
Internal P-Channel Pass TransistorThe MAX8885 features a 1.1Ω(typ) P-channel MOSFET
pass transistor. This provides several advantages over
similar designs using PNP pass transistors, including
longer battery life. The P-channel MOSFET requires no
base drive, which reduces quiescent current signifi-
cantly. PNP-based regulators waste considerable cur-
rent in dropout when the pass transistor saturates. They
also use high base-drive currents under large loads.
The MAX8885 does not suffer from these problems and
consumes only 100µA of quiescent current whether in
dropout, light-load, or heavy-load applications (see
Typical Operating Characteristics).
Power-OK Output (POK)When the output voltage goes out of regulation—as dur-
ing dropout, current limit, or thermal shutdown—POK
goes low. POK is an open-drain N-channel MOSFET. To
obtain a logic-level output, connect a pull-up resistor
from POK to OUT. To minimize current consumption,
make this resistor as large as practical. A 100kΩresis-
tor works well for most applications. The POK function is
not active during shutdown. A capacitor to GND may be
added to generate a power-on-reset (POR) delay, which
can operate down to VIN≤1V. (See POK Startup
Response in the Typical Operating Circuit.)
Current LimitThe MAX8885 includes a current limiter that monitors
and controls the pass transistor’s gate voltage, limiting
the output current to 390mA (typ). For design purpos-
es, consider the current limit to be 160mA (min) to
600mA (max). The output can be shorted to ground for
an indefinite period of time without damaging the part.
Thermal-Overload ProtectionWhen the junction temperature exceeds TJ= +170°C,
the thermal sensor signals the shutdown logic, turning
off the pass transistor and allowing the IC to cool. The
