MAX629CSLASHD datasheet(2/12 Pages) MAXIM

2 / 12 page

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

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC Input Voltage (Note 2)

2.7

5.5

VCC Supply Current

VFB = 1.3V

120

µA

VCC Shutdown Current

SHDN

= GND

0.04

µA

VCC Undervoltage Lockout

100mV hysteresis

2.3

2.5

2.65

Input Supply Voltage (Note 2)

Voltage applied to L1 (VIN)

0.8

|VOUT|

SHDN

, POL, ISET Logic

Levels

VIH

2.4

VIL

0.4

Positive Output Voltage

Circuit of Figure 2

Negative Output Voltage

Circuit of Figure 3

-|VIN|

-28

LX Switch-Current Limit

ISET = VCC

0.39

0.45

0.51

ISET = GND

0.20

0.25

0.33

LX On-Resistance

VCC = 5V

0.6

1.2

Ω

VCC = 3.3V

0.7

1.4

LX Leakage Current

VLX = 28V, TA = +85°C

0.05

2.5

µA

Maximum LX On-Time

6.5

8.5

10.0

µs

Minimum LX Off-Time

POL = GND

0.7

1.0

1.3

µs

POL = VCC

2.0

3.2

3.8

POL = GND, VFB < 1V

3.0

4.5

6.0

POL = VCC, VFB > 0.25V

3.0

4.5

6.0

FB Set Point

POL = GND (positive

output)

TA = 0°C to +85°C

1.225

1.250

1.275

TA = -40°C to +85°C

1.218

1.282

POL = VCC (negative

output)

TA = 0°C to +85°C

-15

TA = -40°C to +85°C

-25

FB Input Bias Current

REF Output Voltage

VCC = 2.7V to 5.5V,

no load on REF

TA = 0°C to +85°C

1.225

1.250

1.275

TA = -40°C to +85°C

1.218

1.282

Package Code

S8-4

Outline Number

21-0041

Land Pattern Number

90-0096

Thermal Resistance, Single-Layer Board:

Junction to Ambient θJA (C/W)

132°

Junction to Case θJC (C/W)

38°

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Maxim Integrated │ 2

MAX629

28V, Low-Power, High-Voltage,

Boost or Inverting DC-DC Converter

Absolute Maximum Ratings

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

Package Information

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