PIMXRT516SCVJ2A datasheet(40/128 Pages) NXP

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i.MX RT1170 Crossover Processors Data Sheet for Consumer Products, Rev. 1, 05/2021

NXP Semiconductors

Electrical characteristics

4.2.4

DCDC

DCDC can be configured to operate on power-save mode when the load current is less than 50 mA. During

the power-save mode, the converter operates with reduced switching frequency in PFM mode and with a

minimum quiescent current to maintain high efficiency.

DCDC can detect the peak current in the P-channel switch. When the peak current exceeds the threshold,

DCDC will give an alert signal, and the threshold can be configured. By this way, DCDC can roughly

detect the current loading.

DCDC also includes the following protection functions:

•

Over current protection. In run mode, DCDC shuts down when detecting abnormal large current in

the P-type power switch.

•

Over voltage protection. DCDC shuts down when detecting the output voltage is too high.

•

Low voltage detection. DCDC shuts down when detecting the input voltage is too low.

Table 22 shows DCDC characteristics.

Table 22. DCDC characteristics

Description

Min

Typ

Max

Unit

Comments

Input voltage

3.3

3.6

—

Output voltage

• 1.0 V output

0.6

1.375

25 mV per step

• 1.8 V output

1.5

1.8

2.275

25 mV per step

• 1.0 V output

—

150

850

—

• 1.8 V output

—

150

——

Efficiency

• DCDC run mode

—

80%

—

150 mA@vdd1p0

80 mA@vdd1p8

• DCDC low power mode

—

80%

—

300

A@vdd1p0

300

A@vdd1p8

Output voltage accuracy

• DCDC Run mode

-2.5%

—

2.5%

—

Maximum 50 mV

Vp-p@vdd1p0

• DCDC Low power mode

-6%

—

Over current detection

—

1.5

—

The typical value can be

configured as 1.5 A and

2 A by register.

Over voltage detection

• Output 1.8 V

—

2.5

2.75

—

• Output 1.0 V

—

1.5

1.65

—

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