MAX1640EEE datasheet(2/11 Pages) MAXIM

2 / 11 page

Adjustable-Output, Switch-Mode

Current Source with Synchronous Rectifier

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = +12V, VOUT = 6V, Circuit of Figure 2, 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.

Note 1: This ratio is generated by a 1:8 clock divider and is not an error source for current calculations.

IN to GND ...............................................................-0.3V to +28V

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

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

PDRV to GND .............................. (VLDOH - 0.3V) to (VIN + 0.3V)

NDRV to GND .........................................-0.3V to (VLDOL + 0.3V)

TOFF, REF, SET, TERM, CC to GND ......-0.3V to (VLDOL + 0.3V)

D0, D1 to GND .........................................................-0.3V to +6V

CS+, CS- to GND ...................................................-0.3V to +28V

PGND to GND.....................................................................±0.3V

Continuous Power Dissipation (TA = +70°C)

QSOP (derate 8.30mW/°C above +70°C) ................... 667mW

Operating Temperature Range

MAX164_EEE ...................................................-40°C to +85°C

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

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

IREF = 0 to 50µA

D0 = D1 = low

D0 = D1 = low (off mode)

D0 or D1 = high

VOUT = 2V to 24V

VIN = VOUT + 0.5V to 26V

MAX1641

MAX1640

VIN = 5.5V to 26V, ILOAD = 0 to 20mA

MAX1640

CONDITIONS

µA

VSET Input Current

Reference Load Regulation

1.96

2.00

2.04

VREF

Reference Voltage

4.05

4.20

4.35

VLDOL Undervoltage Lockout

µA

Output Current in Off Mode

500

Quiescent VIN Supply Current

0.1

%/V

0.1

0.4

Output Current Compliance

%/V

0.03

Current-Sense Line Regulation

37.5

147

150

153

142

150

158

Full-Scale Current-Sense

Threshold

VIN -

5.5

5.0

4.5

VLDOH

Linear-Regulator Output

Voltage, VIN Referenced

4.5

5.0

5.5

VLDOL

Linear-Regulator Output

Voltage, Ground Referenced

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

5.5

VIN

Input Voltage Range

FET Drive Output Resistance

PFET and NFET drive

Ω

Off-Time Range

µs

Off-Time Accuracy

RTOFF = 62kΩ

1.7

2.2

2.7

µs

Pulse-Trickle Mode Duty-Cycle

Period

D0 = low, D1 = high, RTOFF = 100kΩ

Pulse-Trickle Mode Duty Cycle

(Note 1)

D0 = low, D1 = high, RTOFF = 100kΩ

12.5

Quarter-Scale Current-Sense

Threshold

MAX1640

MAX1641

µA

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