MAX8862 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Cost, Low-Dropout, Dual Linear Regulator

19-1117; 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 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
Cellular Phones
Cordless Phones
PCS Phones
PCMCIA Cards
Modems
Hand-Held Instruments
Electronic Planners
__________Typical Operating Circuit
INPUT 1
2.5V TO 11.5V
1µF
OUTPUT 1
AT 250mA
3.3µF
IN1
SHDN1
IN2
SHDN2
MAX8862
OUT1
OUT2
100k
PWROK1
REF2
GND SET1 SET2 GND
INPUT 2
2.5V TO 11.5V
1µF
OUTPUT 2
AT 100mA
2.2µF
0.1µF
____________________________Features
o Low Cost
o Guaranteed 250mA and 100mA Output Currents,
with Current Limiting
o Dual Mode Operation:
Fixed or Adjustable Output from +2V to +11V
o +2.5V to +11.5V Input Range
o 160mV Dropout Voltage at 200mA Output Current
o Low Supply Current—Even in Dropout
200µA Operating
<1µA Shutdown
o Power-Good Indicator
o Reverse-Battery Protection
o Thermal Overload Protection
______________Ordering Information
PART*
TEMP. RANGE PIN-PACKAGE
MAX8862_ESE
-40°C to +85°C 16 Narrow SO
*Insert the desired suffix letter (from the table below) into the
blank to complete the part number.
SUFFIX
L
T
R
FIXED OUTPUT VOLTAGE (V)
4.95
3.175
2.85
__________________Pin Configuration
TOP VIEW
IN1 1
SHDN1 2
PWROK1 3
GND 4
GND 5
OUT2 6
SET2 7
N.C. 8
MAX8862
16 N.C.
15 SET1
14 OUT1
13 GND
12 GND
11 REF2
10 SHDN2
9 IN2
Narrow SO
Dual Mode is a trademark of Maxim Integrated Products.
________________________________________________________________ Maxim Integrated Products 1
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