MAX1839EEP datasheet(2/26 Pages) MAXIM

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = 8.2V, VSH/SUS = VSH = 5.5V, MINDAC = GND, 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.

VBATT to GND ...........................................................-0.3V to 30V

VBST, VSYNC to GND.................................................-0.3V to 34V

VBST to VLX .................................................................-0.3V to 6V

VDH to VLX.................................................-0.3V to (VBST + 0.3V)

VLX to GND...................................................-6V to (VBST + 0.3V)

VL to GND...................................................................-0.3V to 6V

VCCV, VCCI, VREF, VDL1, VDL2 to GND .........-0.3V to (VL + 0.3V)

VMINDAC, VCTFB, VCSAV to GND ................................-0.3V to 6V

VCS to GND...................................................-0.6V to (VL + 0.3V)

VMODE to GND.............................................................-6V to 12V

VCRF/SDA, VCRF, VCTL/SCL, VCTL, VSH/SUS,

V SH to GND ............................................................-0.3V to 6V

Continuous Power Dissipation (TA = +70°C)

20-Pin QSOP (derate 9.1mW/°C above +70°C)...........727mW

Operating Temperature .......................................-40°C to +85°C

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

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SUPPLY AND REFERENCE

VL = VBATT

4.6

5.5

VBATT Input Voltage Range

VL = open

VBATT = 28V

3.2

VBATT Quiescent Current, Operation

with Full Duty Cycle on DH

DH = DL1 = DL2 = open

VBATT = VL = 5V

3.2

VBATT Quiescent Current, Shutdown

SH/SUS = SH = GND

µA

VL Output Voltage, Normal Operation

6V < VBATT < 28V, 0 < ILOAD < 15mA

5.0

5.35

5.5

VL Output Voltage, Shutdown

SH/SUS = SH = GND, no load

3.5

4.5

5.5

VL rising (leaving lockout)

4.6

VL Undervoltage Lockout Threshold

VL falling (entering lockout)

4.0

VL Undervoltage Lockout Hysteresis

300

REF Output Voltage, Normal

Operation

4.5V < VL < 5.5V, IREF = 40

µA

1.96

2.00

2.04

VL POR Threshold

0.9

2.7

SWITCHING REGULATOR

DH Driver On-Resistance

Ω

DL1, DL2 Driver On-Resistance

Ω

Minimum DH Switching Frequency

1/tDH, SYNC = CS or GND, not synchronized

kHz

DH Minimum Off-Time

250

375

500

DH Maximum Duty Cycle

SYNC Synchronization Range

Detect falling edges on SYNC

200

kHz

SYNC Input Current

0 < VSYNC < 30V

-2

µA

SYNC Input Threshold

SYNC falling, referred to CS

400

500

600

SYNC Input Hysteresis

Referred to the SYNC input threshold

100

150

SYNC Threshold Crossing to DL1,

DL2 Toggle Delay

VSYNC = 0 to 5V, CDL_1 and CDL_2 < 100pF,

50% point on SYNC to 50% point on DL1 or DL2

120

CS Overcurrent Threshold

408

450

492

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