MAX604EPA ,3.3V or adjustable, low-dropout, low quiescent currrent, 500mA linear regulator.Features' 500mA Output Current, with Foldback CurrentThe MAX603/MAX604 low-dropout, low quiescent c ..
MAX604ESA ,5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear RegulatorsMAX603/MAX60419-0269; Rev 0; 9/945V/3.3V or Adjustable, Low-Dropout, Low I , 500mA Linear Regulator ..
MAX604ESA ,5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear RegulatorsELECTRICAL CHARACTERISTICS(V = 6V (MAX603) or 4.3V (MAX604), C = C = 10µF, OFF = V , SET = GND, T = ..
MAX604ESA+ ,5V/3.3V or Adjustable, Low-Dropout, Low-IQ, 500mA Linear RegulatorsELECTRICAL CHARACTERISTICS(V = 6V (MAX603) or 4.3V (MAX604), C = C = 10µF, OFF = V , SET = GND, T = ..
MAX604ESA+T ,5V/3.3V or Adjustable, Low-Dropout, Low-IQ, 500mA Linear RegulatorsFeatures' 500mA Output Current, with Foldback CurrentThe MAX603/MAX604 low-dropout, low quiescent c ..
MAX6063AEUR+T ,Precision, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage ReferencesFeaturesThe MAX6061–MAX6068 are precision, low-dropout,♦ Ultra-Small 3-Pin SOT23 Packagemicropower ..
MAZL068H ,Small-signal deviceapplications intended.(4) The products and product specifications described in this material are su ..
MAZL120H ,Small-signal deviceElectrical characteristics within part numbers T = 25°CaZener operatingZener voltage Reverse curre ..
MAZM068H ,Small-signal deviceElectrical characteristics within part numbers T = 25°C ± 3°CaZener Zener riseReverse currentZener ..
MAZS024 ,Small-signal deviceElectrical characteristics within part numbers T = 25°C±3°CaTemperatureReverse Zener operatingcoef ..
MAZS033 ,Small-signal deviceAbsolute Maximum Ratings T = 25°CaParameter Symbol Rating UnitRepetitive peak forward current I 20 ..
MAZS047 ,Small-signal deviceFeatures0.01±0.01• SS-Mini type 2-pin package (SSMini2-F1)• Low noise type2• V rank classified(V = ..
MAX604EPA
3.3V or adjustable, low-dropout, low quiescent currrent, 500mA linear regulator.
_______________General DescriptionThe MAX603/MAX604 low-dropout, low quiescent cur-
rent, linear regulators supply 5V, 3.3V, or an adjustable
output for currents up to 500mA. They are available in a
1.8W SO package. Typical dropouts are 320mV at 5V
and 500mA, or 240mV at 3.3V and 200mA. Quiescent
currents are 15µA typ and 35µA max. Shutdown turns
off all circuitry and puts the regulator in a 2µA off mode.
A unique protection scheme limits reverse currents
when the input voltage falls below the output. Other fea-
tures include foldback current limiting and thermal
overload protection.
The output is preset at 3.3V for the MAX604 and 5V for
the MAX603. In addition, both devices employ Dual
Mode™ operation, allowing user-adjustable outputs
from 1.25V to 11V using external resistors. The input
voltage supply range is 2.7V to 11.5V.
The MAX603/MAX604 feature a 500mA P-channel
MOSFET pass transistor. This transistor allows the
devices to draw less than 35µA over temperature, inde-
pendent of the output current. The supply current
remains low because the P-channel MOSFET pass tran-
sistor draws no base currents (unlike the PNP transis-
tors of conventional bipolar linear regulators). Also,
when the input-to-output voltage differential becomes
small, the internal P-channel MOSFET does not suffer
from excessive base current losses that occur with sat-
urated PNP transistors.
________________________Applications5V and 3.3V Regulators
1.25V to 11V Adjustable Regulators
Battery-Powered Devices
Pagers and Cellular Phones
Portable Instruments
Solar-Powered Instruments
____________________________Features500mA Output Current, with Foldback Current
LimitingHigh-Power (1.8W) 8-Pin SO PackageDual Mode™Operation: Fixed or Adjustable
Output from 1.25V to 11VLarge Input Range (2.7V to 11.5V) Internal 500mA P-Channel Pass Transistor15µA Typical Quiescent Current2µA (Max) Shutdown ModeThermal Overload ProtectionReverse-Current Protection
______________Ordering InformationDice are tested at TA= +25°C, DC parameters only.Contact factory for availability.
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 500mA Linear Regulators
__________________Pin Configuration
__________Typical Operating Circuit19-0269; Rev 0; 9/94
™ Dual Mode is a trademark of Maxim Integrated Products.
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 500mA Linear Regulators
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VIN= 6V (MAX603) or 4.3V (MAX604), CIN= COUT= 10µF, OFF= VIN, SET = GND, TJ= TMINto TMAX, unless otherwise noted.
Typical values are at TJ= +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.
Supply Voltage (IN or OUT to GND).......................-0.3V to +12V
Output Short-Circuit Duration..............................................1 min
Continuous Output Current...............................................600mA
SET, OFFInput Voltages...........................-0.3V to the greater of
(IN + 0.3V) or (OUT + 0.3V)
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C)............727mW
SO (derate 23.6mW/°C above +70°C).............................1.8W
CERDIP (derate 8.00mW/°C above +70°C).................640mW
Operating Temperature Ranges
MAX60_C_A........................................................0°C to +70°C
MAX60_E_A.....................................................-40°C to +85°C
MAX60_MJA..................................................-55°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
Note 1:Electrical specifications are measured by pulse testing and are guaranteed for a junction temperature (TJ) equal to the
operating temperature range. C and E grade parts may be operated up to a TJof +125°. Expect performance similar to
M grade specifications. For TJbetween +125°C and +150°C, the output voltage may drift more.
Note 2:(VIN- VOUT) is limited to keep the product (IOUTx (VIN- VOUT)) from exceeding the package power dissipation limits.
Note 3:Dropout Voltage is (VIN- VOUT) when VOUTfalls to 100mV below its nominal value at VIN= VOUT+ 2V. For example, the
MAX603 is tested by measuring the VOUTat VIN= 7V, then VINis lowered until VOUTfalls 100mV below the measured value.
The difference (VIN- VOUT) is then measured and defined as ΔVDO.
Note 4:Foldback Current Limit was characterized by pulse testing to remain below the maximum junction temperature.
Note 5: The Reverse-Current Protection Threshold is the output/input differential voltage (VOUT- VIN) at which reverse-current
protection switchover occurs and the pass transistor is turned off.
Note 6:Noise is tested using a bandpass amplifier with two poles at 10Hz and two poles at 10kHz.
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 500mA Linear Regulators
ELECTRICAL CHARACTERISTICS (continued)(VIN= 6V (MAX603) or 4.3V (MAX604), CIN= COUT= 10µF, OFF= VIN, SET = GND, TJ= TMINto TMAX, unless otherwise noted.
Typical values are at TJ= +25°C.) (Note 1)
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 500mA Linear Regulators
__________________________________________Typical Operating Characteristics(VIN= 7V for MAX603, VIN= 5.3V for MAX604, OFF= VIN, SET = GND, CIN= COUT= 10µF, RL= 1kΩ, TJ = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX603/4-TOC-01
LOAD CURRENT (mA)
NORMALIZED OUTPUT VOLTAGE
QUIESCENT CURRENT vs. LOAD CURRENT
MAX603/4-TOC-02
LOAD CURRENT (mA)
QUIESCENT CURRENT (100
OUTPUT VOLTAGE AND
QUIESCENT CURRENT vs. SUPPLY VOLTAGE MAX1603/4 TOC-03
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
QUIESCENT CURRENT (12395711
104
OUTPUT VOLTAGE vs.
TEMPERATURE
MAX603/4-TOC-04
TEMPERATURE (°C)
NORMALIZED OUTPUT VOLTAGE (%)-35856525-15105
QUIESCENT CURRENT vs.
TEMPERATURE
MAX603/4-TOC-05
TEMPERATURE (°C)
QUIESCENT CURRENT (-35856525-15105
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX603/4-TOC-06
LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
300100700600400200
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 500mA Linear Regulators
_____________________________Typical Operating Characteristics (continued)(VIN= 7V for MAX603, VIN= 5.3V for MAX604, OFF= VIN, SET = GND, CIN= COUT= 10µF, RL= 1kΩ, TJ = +25°C, unless otherwise noted.)
______________________________________________________________Pin DescriptionFigure 1.Test Circuit
MAX603/MAX604
_______________Detailed DescriptionThe MAX603/MAX604 are low-dropout, low-quiescent-
current linear regulators designed primarily for battery-
powered applications. They supply an adjustable 1.25V
to 11V output or a preselected 5V (MAX603) or 3.3V
(MAX604) output for load currents up to 500mA. As
illustrated in Figure 2, they consist of a 1.20V reference,
error amplifier, MOSFET driver, P-channel pass transis-
tor, dual-mode comparator, and internal feedback volt-
age divider.
The 1.20V bandgap reference is connected to the error
amplifier’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, the pass transistor gate is pulled
lower, allowing more current to pass and increasing the
output voltage. If the feedback voltage 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 either an internal
resistor voltage divider connected to the OUT pin, or an
external resistor network connected to the SET pin. The
dual-mode comparator examines the SET voltage and
selects the feedback path used. If SET is below 80mV,
internal feedback is used and the output voltage is regulat-
ed to 5V for the MAX603 or 3.3V for the MAX604.
Additional blocks include a foldback current limiter, reverse
current protection, thermal sensor, and shutdown logic.
Internal P-Channel Pass TransistorThe MAX603/MAX604 feature a 500mA P-channel
MOSFET pass transistor. This provides several advan-
tages over similar designs using PNP pass transistors,
including longer battery life.
The P-channel MOSFET requires no base drive, which
reduces quiescent current considerably. PNP based
regulators waste considerable amounts of current in
dropout when the pass transistor saturates. They also
use high base-drive currents under large loads. The
MAX603/MAX604 do not suffer from these problems
and consume only 15µA of quiescent current under
light and heavy loads, as well as in dropout.
5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 500mA Linear RegulatorsFigure 2.Functional Diagram
