Note 2: Limits are 100% tested at TA = 25°C. Limits over the temperature range and relevant supply voltage range are guaranteed

by design and characterization.

Note 3: This supply current excludes the switching current due to the external MOSFETs’ gate charge.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CURRENT LIMIT

ILIM_ reference current

4.5

5

5.5

µA

Adjustable Cycle-by-Cycle

Peak Current-Limit Threshold

0.6V < ILIM_ <2V

30

100

mV

Peak Current-Limit Threshold

Programming Gain

0.6V < ILIM_ <2V

42.5

50

57.5

mV/V

ILIM_ THRESHOLD

Low-Voltage Threshold

Rising

0.3

0.4

0.5

V

High-Voltage Threshold

-1.5

-1

-0.5

V

ILIMSEL THRESHOLD

Low-Voltage Threshold

Rising

0.4

V

ERROR AMPLIFIER

Feedback Regulation Voltage

786.5

800

813.5

mV

FB _ Input Leakage Current

-100

0

+100

nA

Transconductance

1.7

2

2.3

mA/V

POWER-GOOD OUTPUTS

PGOOD_ Threshold

103

110

113

% of

FB_

87

90

93

PGOOD_ Output Low Level

0.05

0.15

0.25

V

PGOOD_ Leakage Current

-100

+100

nA

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

160

°C

Thermal-Shutdown Hysteresis

20

°C

MAX17559

60V, Dual-Output, Synchronous

Step-Down Controller

www.maximintegrated.com

Maxim Integrated │ 6

Electrical Characteristics (continued)