MAX746CSLASHD datasheet(3/16 Pages) MAXIM

3 / 16 page

High-Efficiency, PWM, Step-Down,

N-Channel DC-DC Controller

_______________________________________________________________________________________

Note 1:

The soft-start fault current is the current sink capability of SS when VREF < 1V or when the device is in shutdown.

Note 2:

ISUPP is the supply current drawn by V+, which includes the current drawn by the charge pump. The charge pump

doubles the current drawn by HIGH from the V+ input, so ISUPP = IV+ + 2IHIGH.

ELECTRICAL CHARACTERISTICS (continued)

(V+ = 10V, ILOAD = 0A, IREF = 0µA, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SHDN Input Leakage Current

SYMBOL

MIN

TYP

MAX

UNITS

LBO Output Voltage Low

VOL

0.4

LBI Threshold Voltage

1.96

2.00

2.04

Compensation Pin Impedance

Ω

EXT Source Current

270

LBI Input Leakage Current

LBO Output Leakage Current

µA

SHDN Input Voltage Low

VIL

0.4

SHDN Input Voltage High

VIH

2.0

EXT Output Low

EXT Output High

VHIGH - 0.1

0.25

EXT Sink Current

160

MAX746E/M

CONDITIONS

SHDN = 10V

ISINK = 0.5mA

LBI falling

VHIGH = 15V, VEXT = 2.5V

LBI = 2.5V

V+ = 15V, LBO = 15V, LBI = 2.5V

VHIGH forced to 15V, IEXT = -1mA

VHIGH forced to 15V, IEXT = 1mA

VHIGH = 15V, VEXT = 12.5V

MAX746C

1.97

2.00

2.03

100

0.1

100

Charge-Pump Output Voltage

Maximum Duty Cycle

VHIGH

V+ + 4

V+ + 5

V+ + 6

VLIMIT

125

150

175

V+ = 6V

IHIGH = 0mA to 10mA

V+ – CS

Current-Sense Amplifier

Current-Limit Threshold

MAX746C/D Datasheet(PDF) 3 Page - Maxim Integrated Products

MAX746C/D Datasheet(HTML) 3 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Datasheet Download

Link URL