MAX877EPA datasheet(2/12 Pages) MAXIM

2 / 12 page

5V/3.3V/3V/Adjustable-Output,

Step-Up/Step-Down DC-DC Converters

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (IN to PGND) .......................................0V to +7V

Output Short-Circuit Duration to PGND, AGND (Note 1)....30sec

Voltage Applied to:

LX (switch off).......................................................-0.3V to +7V

(switch on) ...................................30sec short to IN or OUT

OUT,

–

—

N...........................................................-0.3V to +7V

FB ..........................................................-0.3V to (OUT + 0.3V)

AGND to PGND ........................................................-0.3V, +0.3V

Reverse Battery Current....................................................900mA

Continuous Power Dissipation (TA = +70°C)

Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW

SO (derate 5.88mW/°C above +70°C) .........................471mW

CERDIP (derate 8.00mW/°C above +70°C) .................640mW

Operating Temperature Ranges:

MAX87_C_A ........................................................0°C to +70°C

MAX87_E_A .....................................................-40°C to +85°C

MAX87_MJA ..................................................-55°C to +125°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10sec) .............................+300°C

ELECTRICAL CHARACTERISTICS

(VIN = 2.7V, ILOAD = 0mA, LX = 22µH, COUT = 100µF,

–

—

N and ILIM connected to IN, AGND connected to PGND,

TA = TMIN to TMAX, typical values are at TA = +25°C, unless otherwise noted.)

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.

PARAMETER

SEL = 0V

CONDITIONS

MIN

TYP

MAX

Output Voltage

(MAX879 set to

3.3V)

(Note 3)

UNITS

MAX878/MAX879 (VOUT = 3.3V), ILOAD = 100mA, VIN = 2.5V

MAX877/MAX879 (VOUT = 5V), ILOAD = 100mA, VIN = 4V

MAX879, ILOAD = 0mA (Note 4)

SEL = Open

0V <

–

—

–

< VIN

VIN <

–

—

–

< 5V

–

—

–

= 0V

µA

Efficiency

MAX87_C, MAX87_E

Output Voltage Range

–

—

–

Bias Current

MAX87_M

Maximum Operating Voltage

(Notes 2, 3)

6.2

Shutdown Supply Current

100

Output Voltage

(MAX879 set to 5V)

(Note 3)

MAX877C/MAX879C: 0mA

≤ ILOAD ≤ 240mA,

2.7V

≤ VIN ≤ 6.2V;

MAX877E/MAX879E: 0mA

≤ ILOAD ≤ 220mA,

2.7V

≤ VIN ≤ 6.2V;

MAX877M/MAX879M: 0mA

≤ ILOAD ≤ 180mA,

2.7V

≤ VIN ≤ 6.2V

4.80

5.00

5.20

MAX878C/MAX879C: 0mA

≤ ILOAD ≤ 210mA,

1.8V

≤ VIN ≤ 6.2V;

MAX878E/MAX879E: 0mA

≤ ILOAD ≤ 200mA,

1.8V

≤ VIN ≤ 6.2V;

MAX878M/MAX879M: 0mA

≤ ILOAD ≤ 180mA,

1.8V

≤ VIN ≤ 6.2V

3.17

3.30

3.43

µA

ILOAD = 0mA, TA = +25°C

2.88

3.00

3.12

MAX877/MAX879 (VOUT = 5V), 0mA < ILOAD < 180mA,

TA = +25°C

2.5

6.0

Minimum Start-Up Voltage

(Notes 2, 6)

MAX878/MAX879 (VOUT = 3.3V), 0mA < ILOAD < 120mA,

TA = +25°C

1.5

MAX878C: 0mA

≤ ILOAD ≤ 210mA, 1.8V ≤ VIN ≤ 6.2V;

MAX878E: 0mA

≤ ILOAD ≤ 200mA, 1.8V ≤ VIN ≤ 6.2V;

MAX878M: 0mA

≤ ILOAD ≤ 180mA, 1.8V ≤ VIN ≤ 6.2V

No-Load Supply Current

ILOAD = 0mA (switch off)

195

310

µA

Note 1: The output may be shorted to ground continuously if the package power dissipation is not exceeded.

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