RN5T614
POWER MANAGEMENT SYSTEM DEVICE

RN5T614 is the power management IC for GPS-PND/MID and Smart-Phone.
It integrates three high-efficiency step-down DC/DC controllers, eight low dropout regulators, power control logic, Li-ion Battery Charger, I2C-Bus Interface, voltage detections, thermal shut-down, UVLO and etc.

Features

System

  • Thermal Shutdown Function
  • Reset Detector Function
  • UVLO Function
  • I2C-Bus Interface @400kHz (Input voltage range: 1.7V-3.4V)

High Efficiency Step-down DC/DC Converters

  • DC/DC11.20V (0.9V to 1.5V/12.5mV steps) @1200mA with RAMP control (For Core)
  • DC/DC21.15V (0.9V to 1.5V/12.5mV steps and 1.8V) @1000mA with RAMP control (For Logic)
  • DC/DC31.8V (1.8V to 3.3V by external resistors) @500mA (For Memory)
  • DC/DC on/off control pin for DC/DC1 and DC/DC2

Low Drop Voltage Regulators

  • LDO13.0V (Always-on) @10mA
  • LDO21.2V (0.9V/1.0V/1.1V/1.2V/1.3V) @30mA
  • LDO31.2V (0.9V/1.0V/1.1V/1.2V/1.3V) @30mA
  • LDO43.3V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @300mA
  • LDO51.8V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @300mA
  • LDO62.6V (1.2V/1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
  • LDO73.0V (1.2V/1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
  • LDO83.3V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA

Li-ion Battery Charger

  • Support AC adapter charging
  • With the current limit protection and charge current control, the limited power can be efficiently supplied to the system and the battery.
  • The system can power on even when Li-ion Battery is low voltage or open.
  • The device can withstand up to 6.5V on VCHG pin. However, it can withstand high voltage by combining a high voltage protection IC (up to 28V by using BD6040 of ROHM).
  • Rapid timer and Trickle timer integrated.
  • Monitor for the battery thermistor built in.
  • No external MOSFET required.
  • If system loads over AC adapter current rating, the battery will supply the current to the system.
  • Chip temperature detection circuit for over temperature protection integrated.

Package

  • QFN0606-48

Process

  • CMOS

Applications

  • Portable Device (Tablet, Smart Phone, MID, GPS-PND etc.)
  • Information Appliance (STB, HDMI-Dongle etc.)