Rainbow-electronics MAX17409 Manual de usuario descargar pdf (Pagina 2)

MAX17409

1-Phase Quick-PWM GPU Controller

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V

= 12V, V

= V

= 5V, SHDN = ILIM = V

, SKIP = GNDS = PGND = GND, V

= V

CSP

= V

CSN

= 1.05V;

G5–G0 set for 1.05V (G0–G5 = 100110); T

= 0°C to +85°C, unless otherwise specified. Typical values are at T

= +25°C.) (Note 3)

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.

, V

to GND .....................................................-0.3V to +6V

G0–G5 to GND .........................................................-0.3V to +6V

CSP, CSN to GND ....................................................-0.3V to +6V

ILIM, THRM, VRHOT, PWRGD to GND ....................-0.3V to +6V

SKIP to GND.............................................................-0.3V to +6V

CCV, FB, IMON, REF to GND.....................-0.3V to (V

+ 0.3V)

SHDN to GND (Note 1)...........................................-0.3V to +30V

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

GNDS/OFSP, PGND to GND (Note 2) ...................-0.3V to +0.3V

Internal Driver (Note 2)

DL to PGND.............................................-0.3V to (V

+ 0.3V)

BST to GND .........................................................-0.3V to +36V

LX to BST...............................................................-6V to +0.3V

BST to V

..........................................................-0.3V to +30V

DH to LX .................................................-0.3V to (V

BST

+ 0.3V)

Continuous Power Dissipation (T

= +70°C)

28-Pin 4mm x 4mm TQFN

(derate 21.3mW/°C above +70°C) ............................1702mW

Operating Temperature Range .........................-40°C to +105°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +165°C

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

PWM CONTROLLER

Input Voltage Range V

, V

4.5 5.5 V

DC Output-Voltage Accuracy

Measured at FB with respect to GNDS;

includes load-regulation error (Note 4)

-6 +6 mV

Line Regulation Error V

= 4.5V to 5.5V, V

= 4.5V to 26V 0.1 %

GNDS Input Range -200 +200 mV

GNDS/OFSP Gain A

GNDS

V

OUT

/V

GNDS

, -200mV  V

GNDS

 +200mV 0.97 1.00 1.03 V/V

GNDS/OFSP Input Bias Current I

GNDS

-2 +2 µA

= 4.5V to 5.5V, I

REF

= 100µA 1.98 2.000 2.02

REF Voltage V

REF

= 0 to 1mA 1.97 2.000 2.02

Dynamic VID Slew-Rate Accuracy 11.0 12.5 14.0 mV/µs

Soft-Start/Soft-Shutdown

Slew-Rate Accuracy

1.248 1.56 1.872 mV/µs

TON

= 96.75k 142 167 192

TON

= 200k 300 333 366

On-Time (Note 5) t

= 12V, V

= 1.2V

TON

= 303.25k 425 500 575

Minimum Off-Time t

OFF(MIN)

Measured at DH (Note 5) 300 375 ns

TON Shutdown Input Current SHDN = GND, V

= 26V, V

= V

= 0 or 5V 0.01 0.1 µA

Note 1: SHDN might be forced to 12V for the purpose of debugging prototype breadboards using the no-fault test mode, which dis-

ables fault protection.

Note 2: Measurements valid using a 20MHz bandwidth limit.

1 2 3 4 5 6 7 ... 31 32

MAX17409 1

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