MAX5021 datasheet(2/11 Pages) MAXIM

2 / 11 page

Current-Mode PWM Controllers for Isolated

Power Supplies

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = +11V to +28V, VCS = 0, OPTO is unconnected, 10nF bypass capacitors at VIN and VCC, NDRV unconnected, TA = -40°C to

+85°C, unless otherwise noted. Typical values are at VIN = +12V, TA = +25°C, unless otherwise noted.) (Note 1)

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.

VIN to GND .............................................................-0.3V to +30V

VCC to GND ............................................................-0.3V to +13V

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

CS, OPTO to GND ....................................................-0.3V to +6V

NDRV Short-Circuit to GND........................................Continuous

Continuous Power Dissipation (TA = +70°C)

6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW

8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW

8-Pin PDIP (derate 9.1mW/°C above +70°C)................727mW

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

Storage Temperature Range .............................-55°C to +150°C

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

UNDERVOLTAGE LOCKOUT/STARTUP

Undervoltage Lockout Wakeup

Level

VUVR

VIN rising

Undervoltage Lockout Shutdown

Level

VUVF

VIN falling

9.3

10.9

VIN Supply Current at Startup

ISTART

VIN = +22V

µA

VIN Range

VIN

TUVR

VIN steps up from +9V to +26V

Undervoltage Lockout

Propagation Delay

TUVF

VIN steps down from +26V to +9V

µs

INTERNAL SUPPLY

VCC Regulator Set Point

VCCSP

VIN = +11V to +28V, sourcing 1µA to 5mA

from VCC

7.0

10.5

VIN = +28V, OPTO connected to GND

0.9

2.43

VIN Supply Current after Startup

IIN

VIN = +28V, OPTO unconnected (Note 2)

0.4

GATE DRIVER

RON(LOW) Measured at NDRV sinking 5mA

Driver Output Impedance

RON(HIGH) Measured at NDRV sourcing 5mA

Ω

Driver Peak Sink Current

ISINK

250

Driver Peak Source Current

ISOURCE

150

PWM COMPARATOR

Comparator Offset Voltage

VOPWM

VOPTO - VCS

600

750

900

CS Input Bias Current

ICS

-2

µA

Propagation Delay from

Comparator Input to NDRV

TPWM

25mV overdrive

Minimum On-Time

TON(MIN)

150

CURRENT-LIMIT COMPARATOR

Current-Limit Trip Threshold

VCS

540

600

660

Current-Limit Propagation Delay

from Comparator Input to NDRV

TCL

25mV overdrive

MAX5021 Datasheet(PDF) 2 Page - Maxim Integrated Products

MAX5021 Datasheet(HTML) 2 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11

Datasheet Download

Link URL