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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
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

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Low-Cost, Low-Dropout, Dual Linear Regulator
ABSOLUTE MAXIMUM RATINGS
IN1, IN2 to GND (Note 1).....................................................±12V
SET1, SHDN1, PWROK1 to GND.............. -0.3V to (VIN1 + 0.3V)
SET2, SHDN2, REF2 to GND ....................... -0.3V, (VIN2 + 0.3V)
Output Short-Circuit Duration ............................................Infinite
Continuous Power Dissipation (TA = +70°C)
16-Pin Narrow SO (derate 20mW/°C above +70°C) ............... 1W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) ............................ +300°C
Note 1: Connect SHDN1 to IN1 and SHDN2 to IN2 through 20kresistors to limit current flow in case a battery is reversed.
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 (Notes 2, 3)
(VIN_ = VOUT_(TYP) + 1V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Input Voltage Range
Output Voltage
Output Voltage Range
Maximum Output Current
Current Limit
Quiescent Current
Shutdown Supply Current
Dropout Voltage (Note 4)
Line Regulation
Load Regulation
OUT2 Voltage Noise
REFERENCE
REF2 Output Voltage
REF2 Line Regulation
REF2 Load Regulation
CONDITIONS
0mA < IOUT1 250mA,
0mA < IOUT2 100mA
MAX8862L
MAX8862T
MAX8862R
VIN1 = 2.5V min, VOUT1 = 2V
VIN2 = 2.5V min, VOUT2 = 2V
IOUT1
IOUT2
VIN1 = VIN2 = 11.5V
IOUT1 = IOUT2 = 1mA
IOUT1 = 200mA, MAX8862L/T
IOUT2 = 100mA, MAX8862L/T
IOUT1 = 200mA, MAX8862R
IOUT2 = 100mA, MAX8862R
IOUT1 = IOUT2 = 15mA
VIN1 = (VOUT1 (TYP) + 1V)
to 11.5V
VIN2 = (VOUT2 (TYP) + 1V)
to 11.5V
IOUT1 = 0mA to 250mA, COUT1 = 3.3µF
IOUT2 = 0mA to 100mA, COUT2 = 2.2µF
COUT2 = 2.2µF
ZOUT2 = 10mA
10Hz < f < 100kHz
10Hz < f < 1MHz
COUT2 = 100µF
ZOUT2 = 10mA
10Hz < f < 100kHz
10Hz < f < 1MHz
CREF2 = 0.1µF
VIN2 = 2.5V to 11.5V
IREF2 = 0µA to 10µA
MIN
2.5
4.80
3.050
2.75
2
250
100
TYP
4.95
3.175
2.85
580
250
200
0.01
1.5
160
160
165
180
0.03
0.02
0.015
0.02
277
875
211
667
1.230
1.250
1
6
MAX
11.5
5.15
3.300
2.95
11
UNITS
V
V
V
mA
mA
330 µA
1 µA
330
350
350
400
0.1
0.08
mV
%/V
%/mA
µVRMS
mVRMS
1.270
V
mV
mV
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Low-Cost, Low-Dropout, Dual Linear Regulator
ELECTRICAL CHARACTERISTICS (Notes 2, 3)
(VIN_ = VOUT_(TYP) + 1V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
PWROK1 OUTPUT
PWROK1 Trip Voltage
Falling edge at SET1
PWROK1 Hysteresis
Rising edge at SET1
PWROK1 Leakage Current
PWROK1 Low Voltage
SHDN
SHDN_ Logic Low
SHDN_ Logic High
SHDN_ Leakage Current
VPWROK1 = 11.5V
ISINK = 0.5mA
Shutdown mode, VIN_ = VOUT_(TYP) + 1V to 11.5V
Active mode, VIN_ = 11.5V
V SHDN_ = 11.5V
SET_ INPUT
SET_ Reference Voltage
SET_ = OUT_, IOUT1 = IOUT2 = 15mA
SET_ Input Bias Current
VSET_ = 1.30V
SET_ Threshold
Internal feedback
External feedback
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
MIN TYP
1.175
1.200
15
0.01
25
1.8
0.01
1.23
1.25
0.01
250
160
20
MAX UNITS
1.225
1
200
V
mV
µA
mV
0.45
1
V
V
µA
1.28
0.1
40
V
µA
mV
°C
ELECTRICAL CHARACTERISTICS (Notes 2, 3)
(VIN_ = VOUT_(TYP) + 1V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Input Voltage Range
Output Voltage
Output Voltage Range
Maximum Output Current
Current Limit
Quiescent Current
Shutdown Supply Current
Dropout Voltage (Note 4)
CONDITIONS
0mA < IOUT1 250mA,
0mA < IOUT2 100mA
MAX8862L
MAX8862T
MAX8862R
VIN1 = 2.5V min, VOUT1 = 2V
VIN2 = 2.5V min, VOUT2 = 2V
IOUT1
IOUT2
VIN1 = VIN2 = 11.5V
IOUT1 = IOUT2 = 1mA
IOUT1 = 200mA, MAX8862L/T
IOUT2 = 100mA, MAX8862L/T
IOUT1 = 200mA, MAX8862R
IOUT2 = 100mA, MAX8862R
MIN
2.5
4.80
3.050
2.740
2
250
100
TYP
4.95
3.175
2.85
580
250
200
0.01
1.5
160
160
165
180
MAX
11.5
5.15
3.300
2.960
11
UNITS
V
V
V
mA
mA
330 µA
1 µA
330
350 mV
350
400
_______________________________________________________________________________________ 3

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Low-Cost, Low-Dropout, Dual Linear Regulator
ELECTRICAL CHARACTERISTICS (Notes 2, 3) (continued)
(VIN_ = VOUT_(TYP) + 1V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
Line Regulation
IOUT1 = IOUT2 = 15mA
VIN1 = (VOUT1 (TYP) + 1V)
to 11.5V
VIN2 = (VOUT2 (TYP) + 1V)
to 11.5V
Load Regulation
OUT2 Voltage Noise
REFERENCE
REF2 Output Voltage
REF2 Line Regulation
REF2 Load Regulation
PWROK1 OUTPUT
PWROK1 Trip Voltage
PWROK1 Hysteresis
PWROK1 Leakage Current
PWROK1 Low Voltage
SHDN
SHDN_ Logic Low
SHDN_ Logic High
SHDN_ Leakage Current
SET_ INPUT
SET_ Reference Voltage
SET_ Input Bias Current
SET_ Threshold
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
IOUT1 = 0 to 250mA, COUT1 = 3.3µF
COUT2 = 2.2µF, 10Hz < f < 1MHz, IOUT2 = 10mA
C = 2.2µF, ZOUT2 = 10mA
10Hz < f < 100kHz
10Hz < f < 1MHz
10Hz < f < 100kHz
C = 100µF, ZOUT2 = 10mA 10Hz < f < 1MHz
CREF2 = 0.1µF
VIN2 = 2.5V to 11.5V
IREF2 = 0µA to 10µA
Falling edge at SET1
Rising edge at SET1
VPWROK1 = 11.5V
ISINK = 0.5mA
Shutdown mode, VIN_ = VOUT_(TYP) + 1V to 11.5V
Active mode, VIN_ = 11.5V
V SHDN_ = 11.5V
SET_ = OUT_, IOUT1 = IOUT2 = 15mA
VSET_ = 1.30V
Internal feedback
External feedback
MIN TYP MAX UNITS
0.03
0.02
0.12
0.10
%/V
0.015
0.02
%/mA
- 277 -
- 875 -
- 211 - µVRMS
- 667 -
1.217
1.250
1
6
1.277
V
mV
mV
1.165
1.200
15
0.01
25
1.235
1
200
V
mV
µA
mV
0.45
V
2.0 V
0.02
1
µA
1.220
250
1.250
0.01
1.290
0.1
30
V
µA
mV
160
°C
10
Note 2: Guaranteed by design for TA = -40°C.
Note 3: Guaranteed for a junction temperature (TJ) equal to the operating temperature range. E-grade parts are guaranteed by
design to operate up to TJ = +125°C. For TJ above +125°C, specifications exceed the operating limits.
Note 4: Dropout voltage is (VIN_ - VOUT_) when VOUT_ falls to 100mV below its nominal value at VIN_ = (VOUT_ + 1V). For example,
the MAX8862 is tested by measuring the VOUT_ at (VIN_ = 5.95V for the MAX8862L, VIN_ = 4.175V for the MAX8862T, and
VIN_ = 3.85V for the MAX8862R) then VIN_ is lowered until VOUT_ falls 100mV below the measured value.
4 _______________________________________________________________________________________

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Low-Cost, Low-Dropout, Dual Linear Regulator
__________________________________________Typical Operating Characteristics
(VIN1 = VIN2 = 5.3V, CIN1 = CIN2 = 1µF, COUT1 = 3.3µF, COUT2 = 2.2µF, SHDN1 = IN1, SHDN2 = IN2. TA = +25°C, unless
otherwise noted.)
QUIESCENT CURRENT
vs. TEMPERATURE
260
QUIESCENT CURRENT
vs. LOAD CURRENT
120
SHUTDOWN CURRENT
vs. TEMPERATURE
120
240 VIN1 = VIN2 = 12V
220
200
180 VIN1 = VIN2 = 7V
160
140
120
100
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
110
IQ2
100
IQ1
90
80
0.001 0.01 0.1 1 10 100 1000
LOAD CURRENT (mA)
100
80
VIN1 = VIN2 = 12V
60
40
20
0
-40 -20
VIN1 = VIN2 = 7V
0 20 40 60 80 100
TEMPERATURE (°C)
OUTPUT VOLTAGE
vs. TEMPERATURE
3.27
3.26
3.25 OUT1
3.24
OUT2
3.23
3.22
3.21
OUTPUT VOLTAGE
vs. LOAD CURRENT
101
100
VOUT1
99
VOUT2
98
97
96
MAX8862T
OUTPUT VOLTAGE & QUIESCENT CURRENT
vs. SUPPLY VOLTAGE
4 260
VOUT1/VOUT2
240
3 220
2 (IQ1 + IQ2)
200
180
160
1 140
120
3.20
-40 -20
0 20 40 60 80 100
TEMPERATURE (°C)
95
0.001 0.01 0.1 1 10 100 1000
LOAD CURRENT (mA)
0 100
2 3 4 5 6 7 8 9 10 11 12
SUPPLY VOLTAGE (V)
DROPOUT VOLTAGE
vs. LOAD CURRENT
600
OVERSHOOT AND TIME
EXITING SHUTDOWN MODE
MAX8862TOC14
525
450
OUT2
375
A
0V
1V/div
300
225 1V/div
OUT1
150
B
75
0
0 40 80 120 160 200 240 280 320
0V
20µs/div
LOAD CURRENT (mA)
VIN1 = 5.3V, IOUT1 = 5mA
A = SHDN1, 0.8V TO 2.4V, 1V/div
B = OUT1, 1V/div
_______________________________________________________________________________________
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