MAX629 データシートの表示（PDF） - Maxim Integrated

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MAX629

28V, Low-Power, High-Voltage, Boost or Inverting DC-DC Converter

Maxim Integrated 

28V, Low-Power, High-Voltage,

Boost or Inverting DC-DC Converter

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC to GND) ..................................-0.3V to +6V

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

ISET, REF, FB, POL to GND .......................-0.3V to (VCC + 0.3V)

LX to GND ..............................................................-0.3V to +30V

Continuous Power Dissipation (TA = +70°C)

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 +165°C

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

ELECTRICAL CHARACTERISTICS

(VCC = +5V, CREF = 0.1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note1)

PARAMETER

VCC Input Voltage (Note 2)

VCC Supply Current

VCC Shutdown Current

VCC Undervoltage Lockout

Input Supply Voltage (Note 2)

SHDN, POL, ISET Logic Levels

Positive Output Voltage

Negative Output Voltage

LX Switch-Current Limit

LX On-Resistance

LX Leakage Current

Maximum LX On-Time

Minimum LX Off-Time

FB Set Point

FB Input Bias Current

REF Output Voltage

CONDITIONS

VFB = 1.3V

SHDN = GND

100mV hysteresis

Voltage applied to L1 (VIN)

VIH

VIL

Circuit of Figure 2

Circuit of Figure 3

ISET = VCC

ISET = GND

VCC = 5V

VCC = 3.3V

VLX = 28V, TA = +85°C

POL = GND

POL = VCC

POL = GND, VFB < 1V

POL = VCC, VFB > 0.25V

POL = GND

(positive output)

POL = VCC

(negative output)

TA = 0°C to +85°C

TA = -40°C to +85°C

TA = 0°C to +85°C

TA = -40°C to +85°C

VCC = 2.7V to 5.5V,

no load on REF

TA = 0°C to +85°C

TA = -40°C to +85°C

MIN

2.7

2.3

0.8

2.4

-VIN

0.39

0.20

6.5

0.7

2.0

3.0

3.0

1.225

1.218

-15

-25

1.225

1.218

TYP

80

0.04

2.5

0.45

0.25

0.6

0.7

0.05

8.5

1.0

3.2

4.5

4.5

1.250

0

5

1.250

MAX

5.5

120

1

2.65

VOUT

UNITS

V

µA

µA

V

V

V

0.4

28

V

-28

V

0.51

A

0.33

1.2

Ω

1.4

2.5

µA

10.0

µs

1.3

3.8

µs

6.0

6.0

1.275

V

1.282

15

mV

25

50

nA

1.275

V

1.282

2 _______________________________________________________________________________________

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