MAX17595/MAX17596/MAX17597

Peak-Current-Mode Controllers for

Flyback and Boost Regulators

9

Maxim Integrated

Pin Description

Pin Configuration

PIN

NAME

FUNCTION

1, 12

N.C.

No Connection

2

SLOPE

amount of slope compensation with reference-voltage soft-start mode. Connecting this pin to

4V enables reference voltage soft-start with default slope compensation of 50mV/Fs.

3

RT

set the PWM switching frequency.

4

DITHER/SYNC

Frequency Dithering Programming or Synchronization Connection. For spread-spectrum frequency

operation, connect a capacitor from DITHER to SGND, and a resistor from DITHER to RT. To

synchronize the internal oscillator to the externally applied frequency (MAX17595/MAX17596 only),

connect DITHER/SYNC to the synchronization pulse.

5

COMP

Transconductance Amplifier Output. Connect the frequency compensation network between

COMP and SGND.

6

FB

Transconductance Amplifier Inverting Input

7

SS

the soft-start time interval.

8

SGND

Signal Ground. Connect SGND to the signal ground plane.

9

CS

Current-Sense Input. Peak-current-limit trip voltage is 300mV (typ).

10

PGND

Power Ground. Connect PGND to the power ground plane.

11

NDRV

External Switching nMOS Gate-Driver Output

15

16

14

13

5

6

7

8

13

4

12

10

9

EN/ UVLO

OVI

EP

SGND

SS

FB

COMP

2

11

TQFN

MAX17595

MAX17596

TOP VIEW

+

15

16

14

13

5

6

7

8

13

4

12

10

9

EN/UVLO

OVI

EP

SGND

SS

FB

COMP

2

11

TQFN

MAX17597

+