MAX889R datasheet(2/8 Pages) MAXIM

2 / 8 page

High-Frequency, Regulated,

200mA, Inverting Charge Pump

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = V SHDN = +5V, capacitors from Table 1, TA = 0

°C to +85°C, 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.

IN to GND .................................................................-0.3V to +6V

FB, SHDN, CAP+ to GND ............................-0.3V to (VIN + 0.3V)

AGND to GND .......................................................-0.3V to +0.3V

OUT to GND .............................................................-6V to +0.3V

CAP- to GND ............................................(VOUT - 0.3V) to +0.3V

Continuous Output Current ...............................................250mA

Output Short-Circuit Duration ........................................Indefinite

Continuous Power Dissipation (TA = +70

°C)

8-Pin SO (derate 5.88mW/

°C above +70°C)...............471mW

Operating Temperature Range...........................-40

°C to +85°C

Junction Temperature ......................................................+150

°C

Storage Temperature Range .............................-65

°C to +150°C

Lead Temperature (soldering, 10s) ................................+300

°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

VIN

RLOAD = 100

Ω

2.7

5.5

Output Voltage Range

VOUT

R LOAD = 100

Ω

-2.5

-VIN

IOUT(MAX)1

VIN = 5V, VOUT = -3.3V

200

Maximum Output Current

IOUT(MAX)2

VIN = 3.3V, VOUT = -2.5V

145

MAX889R

MAX889S

Quiescent Supply

Current (Free-Run Mode)

IQ(FREE-RUN)

No load, VFB = VIN

MAX889T

MAX889R

3.3

MAX889S

5.5

Quiescent Supply

Current (Regulated Mode)

IQ(REGULATED)

No load, VOUT regulated to

-3.3V

MAX889T

Shutdown Supply Current

I SHDN

V SHDN = 0

0.1

µA

Open-Loop Output

Resistance (Free-Run Mode)

VFB = VIN

2.0

4.5

Ω

Output Resistance

RO(REG1)

VOUT regulated to -3.3V

0.05

Ω

SHDN, FB Input Bias Current

±1

µA

FB Input Offset Voltage

ILOAD = 0

±3

±35

Load Regulation

IOUT = 0 to 200mA

IN Undervoltage Lockout

Threshold

VIN rising (30mV hysteresis)

2.3

2.6

SHDN Logic High

VIH

0.7 x VIN

SHDN Logic Low

VIL

VIN = +2.7V to +5.5V

0.3 x VIN

MAX889R

0.375

0.5

0.62

MAX889S

0.75

1.25

Switching Frequency

fOSC

MAX889T

1.5

2.5

MHz

Thermal Shutdown Threshold

Junction temperature rising

(15

°C hysteresis)

160

°C

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