MAX16936

36V, 220kHz to 2.2MHz Step-Down Converter

with 28µA Quiescent Current

8

Maxim Integrated

Pin Descriptions

Pin Configurations

PIN

NAME

FUNCTION

TSSOP

TQFN

1

16

SYNCOUT

Open-Drain Clock Output. SYNCOUT outputs 180N out-of-phase signal relative to the

internal oscillator. Connect to OUT with a resistor between 100I and 1k

W for 2MHz

operation. For low frequency operation, use a resistor between 1k

W and 10kW.

2

1

FSYNC

Synchronization Input. The device synchronizes to an external signal applied to FSYNC.

Connect FSYNC to AGND to enable skip mode operation. Connect to BIAS or to an

external clock to enable fixed-frequency forced PWM mode operation.

3

2

FOSC

Resistor-Programmable Switching Frequency Setting Control Input. Connect a resistor

from FOSC to AGND to set the switching frequency.

4

3

OUT

Switching Regulator Output. OUT also provides power to the internal circuitry when the

output voltage of the converter is set between 3V to 5V during standby mode.

5

4

FB

Feedback Input. Connect an external resistive divider from OUT to FB and AGND to set

the output voltage. Connect to BIAS to set the output voltage to 5V.

6

5

COMP

Error Amplifier Output. Connect an RC network from COMP to AGND for stable

operation. See the Compensation Network section for more information.

7

6

BIAS

Linear Regulator Output. BIAS powers up the internal circuitry. Bypass with a 1FF

capacitor to ground.

8

7

AGND

Analog Ground

9

8

BST

High-Side Driver Supply. Connect a 0.22FF capacitor between LX and BST for

proper operation.

+

+

TSSOP

13

4

14

3

15

2

16

1

TOP VIEW

10

7

11

6

9

8

12

5

EP

EP

15

16

14

13

6

5

7

8

12

PGND

4

12

11

9

SYNCOUT

BST

AGND

BIAS

COMP

3

10

LX

TQFN

PGOOD

MAX16936

MAXX16936