MWPR1124ZVHT datasheet(72/86 Pages) NXP

72 / 86 page

Table 47. DC-DC Converter Specifications (continued)

Characteristics

Conditions

Symbol

Min

Typ

Max

Unit

DCDC Transition Operating

Behavior

LSS➔Run

t_DCDCbuck_L

S S➔RUN

—

DCDC Turn on Time

TDCDC_ON_buck

—

2.29

—

DCDC Settling Time for

increasing voltage

TDCDC_SETTLE_bu

—

0.371

—

DCDC Settling Time for

decreasing voltage

C = capacitance

attached to the

DCDC V1P8

output rail.

V1 = the initial

output voltage of

the DCDC

V2 = the final

output voltage of

the DCDC

I2 = the load on

the DCDC output

expressed in

Amperes.

TDCDC_SETTLE_bu

—

(C*(V1-V2)/I2

—

1. This is the steady state DC output power. It requires VDCDC_IN >= 1.7V in boost mode. Excessive transient current

load from external device will cause 1p8V and 1P5 output voltage unregulated temporary.

2. This is the frequency that will be observed at LN and LP pins.

3. The voltage output level can be controlled by programming DCDC_VDD1P8CTRL_TRG field in DCDC_REG3.

4. The output current specification in both buck and boost modes represents the maximum current the DC-DC converter

can deliver. The MWPR1x24 radio and MCU blocks current consumption is not excluded. Note that the maxium output

power of the DC-DC converter is 125mW. The available supply current for external device depends on the energy

consumed by the internal peripherals in MWPR1x24.

5. When using DC-DC in low power mode(pulsed mode), current load must be less than 0.5 mA.

6. The minimum VDD_1P5_boost is the maximum of either what is programmed using

DCDC_VDD1P5CTRL_TRG_BOOST field in DCDC_REG3 or VDCDC_IN_boost + 0.05V. For example, if VDCDC_IN =

0.9V, minimum VDD_1P5 is as programmed in DCDC_VDD1P5CTRL_ TRG_BOOST. If VDCDC_IN = 1.5V, minimum

VDD_1P5 = 1.5 + 0.05V is 1.55V.

7. 1.8 V is the default value of the DC-DC 1.5 V output voltage in boost mode. The user can program

DCDC_VDD1P5CTRL_TRG_BOOST field in register DCDC_REG3 to control 1.5 V output voltage level. For reliable

radio operation, a voltage level of 1.425 V is required. VDD_1P5 must not be programmed higher than VDD_1P8.

8. 1.5 V is intended to supply power to MWPR1x24 only. It is not designed to supply power to an external device.

9. Turn on time is measured from the application of power (to DCDC_IN) to when the DCDC_REG0[DCDC_STS_DC_OK]

bit is set. Code execution may begin before the DCDC_REG0[DCDC_STS_DC_OK] bit is set. Full device specification is

not guaranteed until the bit sets.

10. In Buck mode, the maximum VDD_1P8 output is the minimum of either VDCDC_IN_BUCK minus 50 mV or 3.5 V. For

example, if VDCDC_IN = 1.85V, maximum VDD_1P8 is 1.8V. If VDCDC_IN = 4.2V, maximum VDD_1P8 is 3V.

11. 1.5 V is the default value of DCDC VDD_1P5 in buck mode. The user can program DCDC_VDD1P5CTRL_TRG_BUCK

field in register DCDC_REG3 to control 1P5 output voltage level. For Radio operation, minimum 1.425 V is required.

VDD_1P5 must not be programmed higher than VDD_1P8.

7.7 Ratings

MCU Electrical Characteristics

MWPR1124ZVHT/MWPR1024IZVHT Data Sheet, Rev. 0, 04/2018

NXP Semiconductors

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