MAX1921 Evaluation Kit

2

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Component Suppliers

SUPPLIER

PHONE

FAX

WEBSITE

Sumida

847-545-6700

847-545-6720

www.sumida.com

Taiyo Yuden

800-348-2496

847-925-0899

www.t-yuden.com

TDK

847-803-6100

847-390-4405

www.tdk.com

Toko

847-297-0070

847-699-1194

www.tokoam.com

Table 1. JU1 Functions

Table 2. MAX1921 EV Kit Corresponding

Output Voltage

SHUNT

LOCATION

SHDN PIN

MAX1921 OUTPUT

1 and 2

Connected to

VIN

MAX1921 enabled,

VOUT = 1.8V

2 and 3

Connected to

GND

MAX1921 disabled,

VOUT = 0V

Open

Connected to

SHDN pad

External signal

enables or disables

the MAX1921 output

PART NUMBER

MAX1921 EV KIT OUTPUT

VOLTAGE (V)

MAX1920EUT-T

Adjustable

MAX1921EUT15-T

1.5

MAX1921EUT18-T

1.8

MAX1921EUT25-T

2.5

MAX1921EUT30-T

3.0

MAX1921EUT33-T

3.3

Detailed Description

Shutdown Mode

The MAX1921 EV kit features a shutdown mode that

reduces the MAX1921 quiescent current to 0.1µA, pre-

serving battery life. The setting of jumper JU1 selects

the circuit operating modes. Table 1 shows the func-

tions of JU1.

Evaluating Other Output Voltages

The MAX1921 EV kit can be used to evaluate the

MAX1921EUT15-T/25-T/30-T/33-T and the MAX1920EUT-T.

Replace MAX1921EUT18-T with a MAX1921EUT15-T/25-

T/30-T/33-T or MAX1920EUT-T. Table 2 lists the corre-

sponding output voltages. To evaluate different output

voltages, select L1, C2, C3, R1, and R2 for optimum per-

formance according to the Design Procedure section of

the MAX1920/MAX1921 data sheet.

Note: Please indicate that you are using the MAX1920/MAX1921 when contacting these component suppliers.