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RN5T614

POWER MANAGEMENT SYSTEM DEVICE

Outline & Documents

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

Datasheet	Layout Guide	Package Info.
RN5T614 (1.12MB) Rev.1.1 (Jun.5,2012)	RN5T614 (1.56MB) Ver.1.1 (Sep.28,2012)	QFN0606-48

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/DC1: 1.20V (0.9V to 1.5V/12.5mV steps) @1200mA with RAMP control (For Core)
DC/DC2: 1.15V (0.9V to 1.5V/12.5mV steps and 1.8V) @1000mA with RAMP control (For Logic)
DC/DC3: 1.8V (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

LDO1: 3.0V (Always-on) @10mA
LDO2: 1.2V (0.9V/1.0V/1.1V/1.2V/1.3V) @30mA
LDO3: 1.2V (0.9V/1.0V/1.1V/1.2V/1.3V) @30mA
LDO4: 3.3V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @300mA
LDO5: 1.8V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @300mA
LDO6: 2.6V (1.2V/1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
LDO7: 3.0V (1.2V/1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
LDO8: 3.3V (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.