Rainbow-electronics MAX16904 Uživatelský manuál stáhnout pdf (Strana 6)

MAX16904

2.1MHz, High-Voltage,

600mA Mini-Buck Converter

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

SUP

= +14V, T

= +25°C, unless otherwise noted.)

Pin Description

TDFN-EP TSSOP-EP

NAME FUNCTION

1 1 BST Bootstrap Capacitor for High-Side Driver (0.1μF)

2 2, 3 SUP

Voltage Supply Input. Connect a 4.7μF ceramic capacitor from SUP to PGND. Place

the capacitor very close to the SUP pin. For the TSSOP-EP package, connect both SUP

pins together for proper operation.

3 4, 5 LX

Buck Switching Node. LX is high impedance when the device is off. For the TSSOP

package, connect both LX pins together for proper operation.

4 6, 7 PGND

Power Ground. For the TSSOP-EP package, connect both PGND pins together for proper

operation.

MAX16904

5 6OUTS PGOOD

TOP VIEW

7PGND SYNC

8LX BIAS

9SUP GND

TDFN

10BST EN

MAX16904

8 9OUTS N.C.

10PGND N.C.

6 11PGND PGOOD

14SUP GND

15SUP EN

16BST N.C.

12LX SYNC

TSSOP

13LX BIAS

Pin Configurations

LOAD TRANSIENT RESPONSE

(SKIP MODE)

MAX16904 toc09

200

s/div

LOAD

500mA/div

OUT

200mV/div

AC-COUPLED

PGOOD

5V/div

LOAD

= 100mA TO 600mA TO 100mA

UNDERVOLTAGE PULSE (COLD CRANK)

MAX16904 toc10

SUP

10V/div

OUT

5V/div

LOAD

1A/div

PGOOD

5V/div

14V

3.5V

10ms/div

LOAD

= 500mA

STANDBY CURRENT

vs. LOAD CURRENT

MAX16904 toc11

LOAD

(mA)

(μA)

0.1

100

150

200

250

300

0.01 1

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

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