ADC AD-75D II User Manual download pdf (Page 3)

POWER MANAGEMENT SYSTEM DEVICE

1. Outline

RC5T7315 is the Power management LSI that integrates Regulators, Battery Charger, and RTC in one chip.

2. Feature

■ Power Supplies

 13 Linear Regulators

 Five Voltage Detectors (DET1, DETIO, DET2, UVLO, and SHDET)

 Reference Voltage Source

 3ch Step-down DCDC Converters

■ Serial Interface

The interface circuit with CPU consists of 16-bit serial register (8-bit command and 8-bit address), the

address decoder, and the transmitting register (8 bits).

■ GPIO

THIS BLOCK IS COMPOSED OF 14 I/O PINS WITH PULL-UP/DOWN CONTROL FUNCTION.

THE INPUT SIGNALS TO GPIO PINS ARE OUTPUT TO INTC BLOCK, AND THEY BECOME ONE OF THE

INTERRUPT GENERATION FACTORS.

■ INTC Interrupt Controller (INTC)

INTC block detects the state change of external input signals (GPIO 14 bits) and the internal interrupt

signals, and then it generates interrupt signals.

■ 10bit ADC

10bit ADC has 8-channel input ports with a multiplexer.

■ Battery Charger

-There are two external power supply input pins; VCHG1 and VCH2.

-When both VCHG1 and VCHG2 pins have a proper input of voltage range;

the priority is given to VCHG1 pin input. Proper voltage range: 4.0V < V

VCHG 1(VCHG2)

< 6.3V

-The efficient power supply to the system and battery is performed by the current limit protection and the

charge current control.

-Various timers for the charge control are integrated.

-Chip temperature detection circuit is integrated, and it prevents the chip overheating due to the charge.

-Thermistor temperature monitoring circuit is integrated, and it stops charging at the detection of error

temperature while charging. Also, the temperature can be monitored by the integrated ADC.

-LED connection pin is equipped; the external LED can be turned on。

-Maximum allowable current from VBAT pin to VSYS pin: 1.6A.

-VCHG1 and VCHG2 pin: 7V withstand (absolute maximum ratings)

■ Reset Control

The Reset Control circuit generates the RESETB signal by the 7 factors.

■ Real Time Clock

- The time and calendar data are transferred to CPU through serial transfer.

- Integrates the periodic interrupt circuit with alarm function

(RTC interrupt request can be output to INTOUT pin through INTC block).

- All the registers of integrated RTC have their own backup in BKBAT (REGRTC: always ON).

■ Package

CSP0606-120 (0.5mm pitch, PKG thickness = 1mm@MAX)

■ Process

CMOS 0.18μm

1 2 3 4 5 6 7 8 ... 18 19

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ADC AD-75D II User Manual Page 3

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