_______________Detailed Description

Jumper Selection

The 2-pin header JU1 selects the shutdown mode for

the MAX606 and JU2 selects the output voltage. Table

1 lists jumper options.

Table 1. Jumper Functions

Other Output Voltages

The MAX606 output voltage is pin-programmable to 5V

and 12.5V. The MAX606 EV kit comes with the output

voltage set at 5V through a cuttable trace between JU2

pins 1 and 2. If a 12V output is desired from the

MAX606 circuit, cut the trace between JU2 pins 1 and

2, install a jumper between JU2 pins 2 and 3, and

change C2 to a 1µF ceramic capacitor.

If an adjustable output voltage is desired from the cir-

cuit, cut the trace between JU2 pins 1 and 2 and add

the voltage-divider resistors R2 and R3 located on the

board’s solder side. Choose R2 and R3 as follows:

200nA (max), large values (up to 100k

Ω) can be used

for R3 with no significant loss of accuracy. C3, also pro-

vided on the solder side, is an optional feed-forward

capacitor that can reduce output voltage ripple at light

loads. If this feature is desired, choose a value of C3 in

the 4.7pF to 10pF range.

MAX606 Evaluation Kit

2

_______________________________________________________________________________________

JUMPER

STATE

FUNCTION

Open

SHDN pin connected to GND

through a 1M

Ω resistor.

MAX606 in shutdown mode,

JU1

Closed*

SHDN pin connected to VIN.

1–2*

(default trace)

FB pin connected to VIN.

2–3

FB pin connected to GND.

JU2

Open

FB pin connected to resistor-

divider R2 and R3, for

adjustable output voltage.

*

Indicates default setting

MAX606

U1

PGND

VIN

C6

22

µF

16V

JU2

JU1

3

2

1

GND

FB

SHDN

IN

LX

OUT

8

1

2

3

4

7

6

5

C4

0.01

µF

C5

0.1

µF

R1

1M

C3

OPEN

R2

OPEN

VOUT

5V

L1

5

µH

C1

2.2

µF

10V

GND

R3

OPEN

C2

4.7

µF

16V

D1

ZHCS1000

SS

GND

Figure 1. MAX606 EV Kit Schematic