PF1550

Power management integrated circuit (PMIC) for low power

application processors

Rev. 4.0 — 28 September 2018 Data sheet: advance information

1 General description

The PF1550 is a power management integrated circuit (PMIC) designed specifically for

use with i.MX processors on low-power portable, smart wearable and Internet-of-Things

(IoT) applications. It is also capable of providing full power solution to i.MX 7ULP, i.MX

6SL, 6UL, 6ULL and 6SX processors.

With three high efficiency buck converter, three linear regulators, RTC supply, and

battery linear charger, the PF1550 can provide power for a complete battery-powered

system, including application processors, memory, and system peripherals.

1.1 Features and benefits

This section summarizes the PF1550 features:

• Input voltage range to PMIC VBUSIN pin via USB bus or AC adapter: 4.1 V to 6.0 V

• Buck converters:

– SW1, 1.0 A; 0.6 V to 1.3875 V in 12.5 mV steps, or 1.1 V to 3.3 V in variable steps

– SW2, 1.0 A; 0.6 V to 1.3875 V in 12.5 mV steps, or 1.1 V to 3.3 V in variable steps

– SW3, 1.0 A; 1.8 V to 3.3 V in 100 mV steps

– Soft start

– Quiescent current 1.0 μA in ULP mode with light load

– Peak efficiency > 90 %

– Dynamic voltage scaling on SW1 and SW2

– Modes: forced PWM quasi-fixed frequency mode, adaptive variable-frequency mode

– Programmable output voltage, current limit and soft start

• LDO regulators

– LDO1, 0.75 to 1.5 V/1.8 to 3.3 V, 300 mA with load switch mode

– LDO2, 1.8 to 3.3 V, 400 mA

– LDO3, 0.75 to 1.5 V/1.8 to 3.3 V, 300 mA with load switch mode

– Quiescent current < 1.5 μA in Low-power mode

– Programmable output voltage

– Soft start and ramp

– Current limit protection

• Battery charger

– Supports single-cell Lithium Ion/Lithium Polymer batteries

– Linear charging (10 mA to 1500 mA input limit)

– Up to 6.5 V input operating range

– VSYS regulator can withstand transient and DC inputs from 0 V up to +22 V

– Programmable charge voltage (3.5 V to 4.44 V)

– Programmable charge current (100 mA to 1000 mA)

– Programmable charge termination current (5.0 mA to 50 mA)

NXP Semiconductors

PF1550

Power management integrated circuit (PMIC) for low power application processors

Data sheet: advance information Rev. 4.0 — 28 September 2018

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– Integrated 50 mΩ battery isolation MOSFET for operation with no/low battery

– Battery supplement mode

– Battery discharge overcurrent protection, up to 3.0 A

– USB_PHY low dropout linear regulator

– Programmable LED driver (status indicator)

– JEITA compliant battery temp sensing and charger control

– Key charging parameters can be configured and permanently stored in OTP

– I

C Control Interface permitting processor control and event detection

• LDO/switch supply

– RTC supply VSNVS 3.0 V, 2.0 mA

– Battery backed memory including coin cell charger

• DDR memory reference voltage, VREFDDR, 0.5 to 0.9 V, 10 mA

• OTP (One time programmable) memory for device configuration

– User programmable start-up sequence, timing, soft-start and power-down sequence

– Programmable regulator output voltages and charger parameters

• I

C interface

• User programmable Standby, Sleep/Low-power, and Off (REGS_DISABLE) modes

• Ambient temperature range −40 °C to 105 °C

1.2 Applications

• Smart mobile/wearable devices

• Low-power IoT applications

• Wireless game controllers

• Embedded monitoring systems

• Home automation

• POS

• E-Read