MAX8862LESE MAXIM [Maxim Integrated Products], MAX8862LESE Datasheet

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MAX8862LESE

Manufacturer Part Number
MAX8862LESE
Description
Low-Cost, Low-Dropout, Dual Linear Regulator
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Part Number:
MAX8862LESE+
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12 000
The MAX8862 low-cost, low-dropout, dual linear voltage
regulator is ideal for battery-powered and portable
applications. The regulators have independent supply
inputs and provide 250mA and 100mA, respectively,
with a full-load dropout voltage of 160mV. Both regula-
tors use P-channel MOSFET pass transistors and main-
tain low quiescent current independent of load current.
In dropout, the MOSFET does not suffer from excessive
base currents, as do saturated PNP transistors.
The MAX8862 output voltage is preset to 4.95V (L),
3.175V (T), or 2.85V (R). This device employs Dual
Mode™ operation, allowing user-adjustable outputs
from +2V to +11V with external resistors. The input
supply-voltage range is 2.5V to 11.5V. Other features
include independent shutdown, power-good indicator,
short-circuit and reverse-battery protection, and ther-
mal shutdown.
The MAX8862’s regulators are ideal power supplies for
the radio and the microcontroller (µC) used in digital,
cordless, and PCS phones. The main regulator is opti-
mized for superior transient and dynamic response,
while the secondary regulator exhibits low-output, wide-
band noise.
The MAX8862 comes in a 16-pin SO package with a
lead frame that uses multiple GND pins as a heat sink
for additional thermal dissipation.
________________________Applications
19-1117; Rev 0; 8/96
Dual Mode is a trademark of Maxim Integrated Products.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
__________Typical Operating Circuit
_______________General Description
OUTPUT 1
AT 250mA
INPUT 1
2.5V TO 11.5V
Low-Cost, Low-Dropout, Dual Linear Regulator
Cellular Phones
PCS Phones
Modems
Electronic Planners
3.3µF
1µF
100k
________________________________________________________________ Maxim Integrated Products
IN1
SHDN1
OUT1
GND SET1 SET2 GND
PWROK1
MAX8862
Cordless Phones
PCMCIA Cards
Hand-Held Instruments
SHDN2
OUT2
REF2
IN2
1µF
2.2µF
0.1µF
OUTPUT 2
AT 100mA
INPUT 2
2.5V TO 11.5V
____________________________Features
*Insert the desired suffix letter (from the table below) into the
blank to complete the part number.
______________Ordering Information
MAX8862_ESE
__________________Pin Configuration
Low Cost
Guaranteed 250mA and 100mA Output Currents,
with Current Limiting
Dual Mode Operation:
+2.5V to +11.5V Input Range
160mV Dropout Voltage at 200mA Output Current
Low Supply Current—Even in Dropout
Power-Good Indicator
Reverse-Battery Protection
Thermal Overload Protection
TOP VIEW
SUFFIX
Fixed or Adjustable Output from +2V to +11V
200µA Operating
<1µA Shutdown
PART*
R
L
T
PWROK1
SHDN1
OUT2
SET2
GND
GND
N.C.
IN1
TEMP. RANGE
-40°C to +85°C
1
2
3
4
5
6
7
8
FIXED OUTPUT VOLTAGE (V)
Narrow SO
MAX8862
3.175
4.95
2.85
16
15
14
13
12
11
10
9
16 Narrow SO
PIN-PACKAGE
N.C.
SET1
OUT1
GND
GND
REF2
SHDN2
IN2
1

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MAX8862LESE Summary of contents

Page 1

Rev 0; 8/96 Low-Cost, Low-Dropout, Dual Linear Regulator _______________General Description The MAX8862 low-cost, low-dropout, dual linear voltage regulator is ideal for battery-powered and portable applications. The regulators have independent supply inputs and provide 250mA and 100mA, respectively, with a ...

Page 2

Low-Cost, Low-Dropout, Dual Linear Regulator ABSOLUTE MAXIMUM RATINGS IN1, IN2 to GND (Note 1).....................................................±12V SET1, SHDN1, PWROK1 to GND.............. -0. SET2, SHDN2, REF2 to GND ....................... -0.3V, (V Output Short-Circuit Duration ............................................Infinite Continuous Power Dissipation (T = +70°C) ...

Page 3

Low-Cost, Low-Dropout, Dual Linear Regulator ELECTRICAL CHARACTERISTICS (Notes 1V 0°C to +85°C, unless otherwise noted. Typical values are at T IN_ OUT_(TYP) A PARAMETER PWROK1 OUTPUT PWROK1 Trip Voltage Falling edge at ...

Page 4

Low-Cost, Low-Dropout, Dual Linear Regulator ELECTRICAL CHARACTERISTICS (Notes 2, 3) (continued 1V -40°C to +85°C, unless otherwise noted. Typical values are at T IN_ OUT_(TYP) A PARAMETER OUT1 Line Regulation I ...

Page 5

Low-Cost, Low-Dropout, Dual Linear Regulator __________________________________________Typical Operating Characteristics ( 5.3V 1µF, C IN1 IN2 IN1 IN2 OUT1 otherwise noted.) QUIESCENT CURRENT vs. TEMPERATURE 260 240 12V IN1 IN2 220 ...

Page 6

Low-Cost, Low-Dropout, Dual Linear Regulator ____________________________Typical Operating Characteristics (continued 5.3V 1µF, C IN1 IN2 IN1 IN2 OUT1 otherwise noted.) OUT1 NOISE AND RIPPLE 5µs/div I = 250mA, AC COUPLED OUT1 OUT1 LOAD-TRANSIENT ...

Page 7

Low-Cost, Low-Dropout, Dual Linear Regulator ______________________________________________________________Pin Description PIN NAME 1 IN1 Main Regulator Supply Input (2.5V to 11.5V). Bypass with a 1µF, low-ESR capacitor to GND. SHDN1 2 Main Regulator Shutdown Input. A logic low turns off the main regulator ...

Page 8

Low-Cost, Low-Dropout, Dual Linear Regulator 1N1 BIAS SHDN1 1.25V IN2 BIAS SHDN2 REF2 1.25V Figure 1. Functional Diagram Output Voltage Selection The MAX8862’s Dual Mode operation allows a fixed or adjustable output voltage. In preset/internal-feedback mode (SET1/SET2 = GND), output ...

Page 9

Low-Cost, Low-Dropout, Dual Linear Regulator MAX8862 OUT_ SET_ GND Figure 2. Adjustable Output Voltage The MAX8862 provides a precision 1.25V reference at REF2. Bypass REF2 with a 0.1µF capacitor to ground. Larger bypassing capacitors will further reduce the secondary regulator’s ...

Page 10

Low-Cost, Low-Dropout, Dual Linear Regulator 100 PC-BOARD COPPER FOIL AREA (Cm Figure 3. Typical Copper Thermal Resistance vs. Copper Ground Pad Area 400 MAXIMUM CURRENT 350 300 (R) 250 ...

Page 11

Low-Cost, Low-Dropout, Dual Linear Regulator 70 OUT1 IN1 p IN1 C = 3.3µF OUT1 1mA OUT1 10mA OUT1 ...

Page 12

Low-Cost, Low-Dropout, Dual Linear Regulator ________________________________________________________Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are Maxim cannot assume ...

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