Note 1: 100% production tested at TA = +25°C and TA = +125°C. Limits at -40°C are guaranteed by design.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

OSCILLATOR

Frequency

225

250

275

kHz

Maximum Duty Cycle

87

%

87

87

SYNC High-Level Voltage

2.2

V

SYNC Low-Level Voltage

0.8

V

SYNC Frequency Range

150

350

kHz

PWM Modulator Gain

10

V/V

Ramp Level Shift (Valley)

0.3

V

POWER SWITCH

Switch On-Resistance

0.3

0.6

Ω

Switch Gate Charge

6

nC

Switch Leakage Current

10

µA

BST Leakage Current

10

µA

CHARGE PUMP

C- Output Voltage Low

MAX5082 only, sinking 10mA

0.1

V

C- Output Voltage High

MAX5082 only, relative to DVREG,

sourcing 10mA

0.1

V

DVREG to C+ On-Resistance

MAX5082 only, sourcing 10mA

10

Ω

LX to PGND On-Resistance

Sinking 10mA

12

Ω

CURRENT-LIMIT COMPARATOR

Pulse-Skip Threshold

100

200

300

mA

Cycle-by-Cycle Current Limit

1.9

2.7

3.5

A

Number of Consecutive ILIM

Events to Hiccup

4

Hiccup Timeout

512

Clock

periods

INTERNAL VOLTAGE REGULATOR

Output Voltage

MAX5082

4.75

5

5.25

V

MAX5083

7.6

8

8.4

Line Regulation

1

mV/V

1

Load Regulation

0.25

V

Dropout Voltage

0.5

V

0.5

THERMAL SHUTDOWN

Thermal Shutdown Temperature

Temperature rising

+160

°C

Thermal Shutdown Hysteresis

20

°C

MAX5082/MAX5083

1.5A, 40V, MAXPower Step-Down

DC-DC Converters

www.maximintegrated.com

Maxim Integrated │ 3

Electrical Characteristics (continued)