MAX688 datasheet(2/12 Pages) MAXIM

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High-Accuracy, Low-Dropout

Linear Regulators

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = 3.8V, SHDN = VIN (MAX688/MAX689), RB = 0Ω, C1 = 2.2µF, C2 = 10µF, C3 = 10nF, TA = TMIN to TMAX, unless otherwise

noted. Typical values are at TA = +25°C.)

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.

Input Supply Voltage IN to GND ............................................12V

Terminal Voltages to GND

PFO (MAX687) ........................................-0.3V to VOUT + 0.3V

PFO (MAX688/MAX689) ......................................-0.3V to 12V

All Remaining Pins .....................................-0.3V to VIN + 0.3V

PFO Sink Current ...............................................................10mA

PFO Source Current (MAX687)...........................................10mA

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

µMAX (derate 4.1mW/°C above +70°C) ......................330mW

Operating Temperature Ranges

MAX68_C_A .......................................................0°C to +70°C

MAX68_E_A ....................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +165°C

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

MAX687/MAX688

(Note 1)

VBASE = VIN - 1V

PNP = FZT749, ILOAD = 100mA (Note 4)

VIN = 3.8V,

PNP = FZT749,

no load

(Note 3)

1µA

≤ IBASE ≤ 10mA

RB is connected from BASE to BLIM (Ω),

RB = 0Ω to 100Ω

CONDITIONS

µF

Load Capacitance

Start-Up Overshoot

µs

300

Start-Up Time

100

130

RB + 5Ω RB + 5Ω RB + 5Ω

Base-Current Limit

3.2

3.3

3.4

VOUT

Output Voltage

2.7

11.0

VIN

Supply Voltage

IBASE

BASE Sink Current

< 0.02

µA

150

250

IGND

Supply Current

3.13

3.3

3.47

VIN - VOUT

Dropout Voltage (Note 2)

mV/V

0.4

1.4

Line Regulation

Load Regulation

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

VIN = 3.8V, IBASE = 1mA

3.8V

≤ VIN ≤ 11.0V,

1µA

≤ IBASE ≤ 10mA

PNP = FZT749, ILOAD = 200mA, C2 = 20µF

3.8V

≤ VIN ≤ 11.0V,

IBASE = 1mA

MAX687/MAX688

MAX689

2.9

3.0

3.1

2.85

3.0

3.15

VIN = 3.5V, IBASE = 1mA

3.5V

≤ VIN ≤ 11.0V,

1µA

≤ IBASE ≤ 10mA

MAX689

3.5V

≤ VIN ≤ 11.0V,

IBASE = 1mA

0.4

1.4

Standby,

MAX688/MAX689

Shutdown

LINEAR REGULATOR

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