MAX603 Maxim Integrated Products, MAX603 Datasheet

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MAX603

Manufacturer Part Number
MAX603
Description
Manufacturer
Maxim Integrated Products
Datasheet

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The 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.
________________________Applications
™ Dual Mode is a trademark of Maxim Integrated Products.
19-0269; Rev 0; 9/94
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
BATTERY
5V and 3.3V Regulators
1.25V to 11V Adjustable Regulators
Battery-Powered Devices
Pagers and Cellular Phones
Portable Instruments
Solar-Powered Instruments
C
10 F
IN
________________________________________________________________ Maxim Integrated Products
OFF
IN
GND
MAX603
MAX604
5V/3.3V or Adjustable, Low-Dropout,
SET
OUT
Low I
C
10 F
OUT
VOLTAGE
OUTPUT
Q
, 500mA Linear Regulators
* Dice are tested at T
** Contact factory for availability.
____________________________Features
__________________Pin Configuration
______________Ordering Information
MAX603CPA
MAX603CSA
MAX603C/D
MAX603EPA
MAX603ESA
MAX603MJA
MAX604CPA
MAX604CSA
MAX604C/D
MAX604EPA
MAX604ESA
MAX604MJA
500mA Output Current, with Foldback Current
Limiting
High-Power (1.8W) 8-Pin SO Package
Dual Mode™ Operation: Fixed or Adjustable
Output from 1.25V to 11V
Large Input Range (2.7V to 11.5V)
Internal 500mA P-Channel Pass Transistor
15µA Typical Quiescent Current
2µA (Max) Shutdown Mode
Thermal Overload Protection
Reverse-Current Protection
TOP VIEW
PART
GND
GND
OFF
IN
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
1
2
3
4
A
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
= +25°C, DC parameters only.
DIP/SO
MAX603
MAX604
8
7
6
5
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
OUT
GND
GND
SET
PIN-PACKAGE
1

Related parts for MAX603

MAX603 Summary of contents

Page 1

... 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. ...

Page 2

... 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 ( (MAX603) or 4.3V (MAX604 Typical values are +25°C.) (Note 1) J ...

Page 3

... Adjustable, Low-Dropout, ELECTRICAL CHARACTERISTICS (continued (MAX603) or 4.3V (MAX604 Typical values are +25°C.) (Note 1) J PARAMETER SYMBOL Reverse-Current Protection ∆V Threshold (Note 5) Reverse Leakage Current I RVL Start-Up Overshoot V OSH Time Required to Exit Shutdown t START Dual-Mode SET Threshold V SET TH SET Reference Voltage ...

Page 4

... Adjustable, Low-Dropout, Low I , 500mA Linear Regulators Q __________________________________________Typical Operating Characteristics ( for MAX603 5.3V for MAX604, OFF = OUTPUT VOLTAGE vs. LOAD CURRENT 1.01 1.00 0.99 0.98 0. 3.3V, 5V, 10V OUT NORMALIZED TO 0.96 OUTPUT VOLTAGE AT 1mA 0.95 0 100 LOAD CURRENT (mA) OUTPUT VOLTAGE vs. TEMPERATURE 104 103 ...

Page 5

... Adjustable, Low-Dropout, _____________________________Typical Operating Characteristics (continued for MAX603 5.3V for MAX604, OFF = LOAD-TRANSIENT RESPONSE MAX603 OUT 2ms/div A: OUTPUT VOLTAGE (100mV/div 500mA (HIGH 5mA (LOW) OUT OUT ______________________________________________________________Pin Description PIN NAME 1 IN Regulator Input. Supply voltage can range from 2.7V to 11.5V. ...

Page 6

... SET voltage and selects the feedback path used. If SET is below 80mV, internal feedback is used and the output voltage is regulat for the MAX603 or 3.3V for the MAX604. Additional blocks include a foldback current limiter, reverse current protection, thermal sensor, and shutdown logic. ...

Page 7

... Otherwise, spurious conditions could cause the voltage at SET to exceed the 80mV dual-mode threshold. A low input on the OFF pin shuts down the MAX603/ MAX604. In the off mode, the pass transistor, control circuit, reference, and all biases are turned off, reduc- ing the supply current below 2µ ...

Page 8

... BA printed circuit board, copper traces and other materials to the surrounding air. The 8-pin SOIC package for the MAX603/MAX604 features a special lead frame with a lower thermal resistance and higher allowable power dissipation. The thermal resistance of this package is = 42°C/W, compared with ...

Page 9

... C Normally, use 0.1µF to 10µF capacitors on the input OUT 10 F and 10µF on the output of the MAX603/MAX604. The larger input capacitor values provide better supply- noise rejection and line-transient response. Improve load-transient response, stability, and power-supply rejection by using large output capacitors. For stable operation over the full temperature range and with load currents up to 500mA, 10µ ...

Page 10

... In battery-powered systems, this will determine the useful end-of-life battery voltage. Because the MAX603/MAX604 use a P-channel MOSFET pass tran- sistor, their dropout voltage is a function of r plied by the load current (see Electrical Characteristics ). Quickly stepping up the input voltage from the dropout voltage can result in overshoot ...

Page 11

Adjustable, Low-Dropout, ________________________________________________________Package Information ______________________________________________________________________________________ Low I , 500mA Linear Regulators 0° - 15° PACKAGE PLASTIC ...

Page 12

... 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. 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1994 Maxim Integrated Products ...

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