ZSPM2000 Datasheet

© 2016 Integrated Device Technology, Inc.

35

January 27, 2016

5

External Component Selection

5.1.

Output Voltage Feedback Components

The ZSPM2000 supports direct output voltage feedback without external components up to an output voltage of

1.4V. However, adding a high-frequency low-pass filter in the sense path is highly recommended to remove high-

frequency disturbances from the sense signals. Placing these components as close as possible to the ZSPM2000

is recommended. For larger output voltages, a feedback divider is required. Using resistors with small tolerances

is recommended to guarantee good output voltage accuracy. Table 5.1 lists the required component values as a

function of the maximum supportable output voltage. It is mandatory that the selected resistors values are

configured in the Pink Power Designer™ GUI so that they can be taken into account for the configuration of the

ZSPM2000.

Figure 5.1

Output Voltage Sense Circuitry

Table 5.1

Output Voltage Feedback Component Overview

Nominal

Output Voltage

Maximum

Output Voltage

R4

R5

C7

1.20V

1.40V

open

1.0k

Ω

22pF

1.80V

2.1V

1.5k

Ω

750

Ω

47pF

2.50V

2.80V

1.0k

Ω

1.0k

Ω

47pF

3.30V

4.25V

1.0k

Ω

2.2k

Ω

33pF

5.00V

5.00V

1.0k

Ω

3.3k

Ω

33pF

VFBP

VFBN

R4

R5

C7

PGND

VOUT

ZSPM2000