Maxim MAX8862LESE, MAX8862RESE, MAX8862TESE Datasheet

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 regulators use P-channel MOSFET pass transistors and maintain 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 thermal 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 optimized for superior transient and dynamic response, while the secondary regulator exhibits low-output, wideband 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 SHDN2

MAX8862

OUT1 OUT2

100k

PWROK1 GND SET1 SET2 GND

IN2

REF2

INPUT 2

2.5V TO 11.5V

1µF

OUTPUT 2 AT 100mA

2.2µF

0.1µF

____________________________Features

♦ Low Cost ♦ Guaranteed 250mA and 100mA Output Currents,

with Current Limiting

♦ Dual Mode Operation:

Fixed or Adjustable Output from +2V to +11V

♦ +2.5V to +11.5V Input Range ♦ 160mV Dropout Voltage at 200mA Output Current ♦ Low Supply Current—Even in Dropout

200µA Operating <1µA Shutdown

♦ Power-Good Indicator ♦ Reverse-Battery Protection ♦ Thermal Overload Protection

______________Ordering Information

PART*

MAX8862_ESE -40°C to +85°C

*Insert the desired suffix letter (from the table below) into the blank to complete the part number.

SUFFIX

L T R 2.85

TEMP. RANGE PIN-PACKAGE

16 Narrow SO

FIXED OUTPUT VOLTAGE (V)

4.95

3.175

__________________Pin Configuration

TOP VIEW

N.C.

SET1

15 14

OUT1

GND GND

12 11

REF2

SHDN2 IN2

SHDN1

PWROK1

GND GND

OUT2

SET2

N.C.

IN1

1 2 3 4

MAX8862

5 6 7 8

MAX8862

Narrow SO

Dual Mode is a trademark of Maxim Integrated Products.

________________________________________________________________

Maxim Integrated Products

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

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 (V

SET2, SHDN2, REF2 to GND....................... -0.3V, (V

Output Short-Circuit Duration ............................................Infinite

Continuous Power Dissipation (T

16-Pin Narrow SO (derate 20mW/°C above +70°C)............... 1W

= +70°C)

IN1 IN2

+ 0.3V) + 0.3V)

Note 1: Connect SHDN1 to IN1 and SHDN2 to IN2 through 20kΩ resistors to limit current flow in case a battery is reversed.

MAX8862

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)

= V

IN_

OUT_(TYP)

Output Voltage

Maximum Output Current

Current Limit

Dropout Voltage (Note 4)

Line Regulation

Load Regulation

OUT2 Voltage Noise

REFERENCE

REF2 Output Voltage C REF2 Line Regulation V REF2 Load Regulation I

+ 1V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

CONDITIONS

0mA < I 0mA < I

IN1

IN2

OUT1

OUT2

IN1

OUT1

OUT2

OUT1

OUT2

OUT1

OUT2

REF2

IN2

REF2

≤ 250mA,

OUT1

≤ 100mA

OUT2

= 2.5V min, V = 2.5V min, V

= V

= 11.5V

IN2

= I

OUT2

OUT1 OUT2

= 1mA

= 2V = 2V

= 200mA, MAX8862L/T = 100mA, MAX8862L/T = 200mA, MAX8862R = 100mA, MAX8862R

= I

= 15mA

OUT2

= 0mA to 250mA, C = 0mA to 100mA, C

= 2.2µF

= 10mA

= 100µF

= 10mA

= 0.1µF 1.230 1.250 1.270 V

= 2.5V to 11.5V 1 mV

= 0µA to 10µA 6 mV

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

MAX8862L MAX8862T MAX8862R

4.80 4.95 5.15

3.050 3.175 3.300

2.75 2.85 2.95

250 100

580 250

1.5 160 330 160 350 165 350 180 400

= (V

IN1

OUT1 (TYP)

to 11.5V V

= (V

IN2

OUT2 (TYP)

to 11.5V

= 3.3µF

OUT1

= 2.2µF

OUT2

10Hz < f < 100kHz

+ 1V)

0.03 0.1

0.02 0.08

0.015

0.02 277

10Hz < f < 1MHz 875 10Hz < f < 100kHz 10Hz < f < 1MHz

211 667

UNITSMIN TYP MAXPARAMETER

%/mA

µVRMS mV

V2.5 11.5Input Voltage Range

V211Output Voltage Range

µA200 330Quiescent Current µA0.01 1Shutdown Supply Current

%/V

RMS

2 _______________________________________________________________________________________

Low-Cost, Low-Dropout, Dual Linear Regulator

SHDN

ELECTRICAL CHARACTERISTICS (Notes 2, 3)

IN_

= V

OUT_(TYP)

+ 1V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

CONDITIONS

PWROK1 OUTPUT

Falling edge at SET1 V1.175 1.200 1.225PWROK1 Trip Voltage Rising edge at SET1

PWROK1

SINK

SHDN_

= 11.5V

= 0.5mA

= 11.5V

IN_

= V

IN_

= 11.5V

OUT_(TYP)

SHDN_ Logic Low SHDN_ Logic High SHDN_ Leakage Current

V I

Shutdown mode, V Active mode, V V

SET_ INPUT

SET_ Threshold

SET_ = OUT_, I V

= 1.30V

SET_

Internal feedback External feedback

OUT1

= I

OUT2

THERMAL PROTECTION

ELECTRICAL CHARACTERISTICS (Notes 2, 3)

= V

IN_

OUT_(TYP)

Output Voltage

Maximum Output Current

Current Limit

Dropout Voltage (Note 4)

+ 1V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

CONDITIONS

0mA < I 0mA < I

IN1

IN2

OUT1

OUT2

IN1

OUT1

OUT2

OUT1

OUT2

≤ 250mA,

OUT1

≤ 100mA

OUT2

= 2.5V min, V = 2.5V min, V

= V

= 11.5V

IN2

= I

OUT2

OUT1 OUT2

= 1mA

= 2V = 2V

= 200mA, MAX8862L/T = 100mA, MAX8862L/T = 200mA, MAX8862R = 100mA, MAX8862R

= 15mA

+ 1V to 11.5V

MAX8862L MAX8862T MAX8862R

250

160Thermal Shutdown Temperature

20Thermal Shutdown Hysteresis

4.80 4.95 5.15

3.050 3.175 3.300

2.740 2.85 2.960

250 100

580 250

1.5 160 330 160 350 165 350 180 400

MAX8862

UNITSMIN TYP MAXPARAMETER

mV15PWROK1 Hysteresis

µA0.01 1PWROK1 Leakage Current

mV25 200PWROK1 Low Voltage

V0.45 V1.8

µA0.01 1

V1.23 1.25 1.28SET_ Reference Voltage

µA0.01 0.1SET_ Input Bias Current

°C

UNITSMIN TYP MAXPARAMETER

V2.5 11.5Input Voltage Range

V211Output Voltage Range

µA200 330Quiescent Current µA0.01 1Shutdown Supply Current

_______________________________________________________________________________________ 3

Low-Cost, Low-Dropout, Dual Linear Regulator

SHDN

ELECTRICAL CHARACTERISTICS (Notes 2, 3) (continued)

= V

IN_

OUT_(TYP)

Line Regulation

MAX8862

Load Regulation

OUT2 Voltage Noise

REFERENCE

REF2 Output Voltage C REF2 Line Regulation V REF2 Load Regulation

PWROK1 OUTPUT

PWROK1 Trip Voltage Falling edge at SET1 1.165 1.200 1.235 V PWROK1 Hysteresis Rising edge at SET1 15 mV PWROK1 Leakage Current V PWROK1 Low Voltage I

+ 1V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

CONDITIONS

= (V

IN1

= I

OUT1

OUT2

C = 2.2µF, Z

C = 100µF, Z

REF2

= 2.5V to 11.5V 1 mV

IN2

REF2

PWROK1

SINK

= 15mA

OUT2

= 0 to 250mA, C

OUT1

= 3.3µF

= 2.2µF, 10Hz < f < 1MHz, I

= 10mA

OUT2

= 10mA

OUT2

= 0.1µF 1.217 1.250 1.277 V

= 0µA to 10µA 6 mV

= 11.5V 0.01 1 µA

= 0.5mA 25 200 mV

OUT1 (TYP)

to 11.5V V

= (V

IN2

OUT2 (TYP)

to 11.5V

OUT2

10Hz < f < 100kHz 10Hz < f < 1MHz 10Hz < f < 100kHz 10Hz < f < 1MHz

+ 1V)

= 10mA

- 277 -

- 875 -

- 211 -

- 667 -

0.03 0.12

0.02 0.10

0.015

0.02

UNITSMIN TYP MAXPARAMETER

%/V

%/mA

µV

RMS

SHDN_ Logic Low SHDN_ Logic High SHDN_ Leakage Current

= V

IN_

OUT_(TYP)

Active mode, V V

= 11.5V 0.02 1 µA

SHDN_

= 11.5V 2.0 V

IN_

+ 1V to 11.5V

SET_ INPUT

SET_ Reference Voltage SET_ = OUT_, I SET_ Input Bias Current V

SET_ Threshold

= 1.30V 0.01 0.1 µA

SET_

Internal feedback 30 External feedback 250

OUT1

= I

= 15mA 1.220 1.250 1.290 V

OUT2

THERMAL PROTECTION

Thermal Shutdown Temperature 160 Thermal Shutdown Hysteresis 10

Note 2: Guaranteed by design for TA= -40°C. Note 3: Guaranteed for a junction temperature (T

design to operate up to T

Note 4: Dropout voltage is (VIN_ - V

the MAX8862 is tested by measuring the V V

= 3.85V for the MAX8862R) then V

IN_

= +125°C. For TJabove +125°C, specifications exceed the operating limits.

_) when V

OUT

) equal to the operating temperature range. E-grade parts are guaranteed by

_ falls to 100mV below its nominal value at VIN_ = (V

OUT

_ at (V

OUT

is lowered until V

IN_

= 5.95V for the MAX8862L, V

IN_

falls 100mV below the measured value.

OUT_

= 4.175V for the MAX8862T, and

IN_

4 _______________________________________________________________________________________

0.45 VShutdown mode, V

_ + 1V). For example,

OUT

°C

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