MPC18730EPSLASHR2 datasheet(14/38 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

18730

FUNCTIONAL DESCRIPTION

INTRODUCTION

FUNCTIONAL DESCRIPTION

INTRODUCTION

The 18730 power management integrated circuit provides

five independent output voltages for the micro controller from

either a single cell Li-Ion or from a single cell Ni-MH or dry

cell. The PMIC includes two DC to DC converters and three

low drop out linear regulators. The output voltage for each of

the five output voltages is set independently through a 3-wire

serial interface. The PMIC has multiple wakeup, sleep, and

reset modes to minimize power consumption for portable

equipment. In single cell Li-Ion applications two DC-DC

converters are configured as buck regulators. In single cell

Ni-MH or dry cell applications, one DC-DC converter is

configured as a boost regulator, and the other as buck-boost

regulator.

FUNCTIONAL TERMINAL DESCRIPTION

CLEAR TERMINAL (CLR)

This Clear input signal makes clear internal latches for

WAKE signal holding. The WAKE control circuit can not

receive another WAKE input until the latch is cleared by this

Clear input.

WAKE SIGNAL TERMINALS (WAKE1B, WAKE2B,

WAKE3B, WAKE4B) ... ACTIVE LOW

Any one WAKE input signal of these four WAKE inputs

awakes this device from sleep mode. The WAKE signals can

be made with external low side mechanical switch and

resistance that is pulled up to VSTB rail.

LOW-SIDE SWITCH OUTPUT TERMINAL (LSWO)

Low-Side switch output that is turned on with ‘CLR’ signal.

It can be used for external key input latches clear.

LOW VOLTAGE BATTERY TERMINAL (LVB)

This input terminal is used for temporarily power supply

while wake up for 1cell Ni-MH battery or 1cell dry cell battery

(= Low Voltage Battery) use. It has to be connected to VB rail.

When Li-Ion battery is used, the terminal has to be open.

HIGH VOLTAGE BATTERY TERMINAL (HVB)

This input terminal is used for temporarily power supply

while wake up for Li-Ion battery (= High Voltage Battery) use.

It has to be connected to the VB rail. When a Ni-MH battery

is used, the terminal has to be connected to ground level.

STANDBY VOLTAGE TERMINAL (V_STBY)

Standby Voltage is made from LVB or HVB that depends

on which battery is used. This voltage is used for internal

logic and analog circuit at standby (sleep) mode temporarily

before ‘VO1’ voltage is established.

VOLTAGE INPUT TERMINALS (VO1, VO2)

This power supply input terminal named ‘VO1 or VO2’ is

for internal logic and analog circuits and for input of ‘VCC1’

output via power switch. Input for ‘VCC2’ is ‘VO2IN’ terminal.

It is supplied from the output of Channel-1 or Channel-2 DC/

DC converter as ‘VO1 or VO2.

VOLTAGE OUTPUT TERMINALS (VCC1, VCC2)

Output ‘VO1’ or ‘VO2’ voltage controlled internal power

switch.

POWER INPUT TERMINALS (VI1, VI2)

The power input terminals (VI1, VI2) are drain terminals on

the top side FET of the DC/DC converter switcher. They are

the power input for the buck converter and output for the

boost converter.

SWITCHING TERMINALS (SW1, SW2)

Switching Terminals (SW1, SW2) are the output of the half

bridge and connect to the external inductance.

POWER GROUND TERMINALS (PGND1, PGND2,

PGND3)

Ground level node for DC/DC converter and Charge Pump

portion.

INVERTED RESET OUTPUT TERMINALS (RSTO1B,

RSTO2B)

Reset signal output for external MPU or the something

controller. RSTO1B keeps ‘Low’ level while the VO1 voltage

is less than internal reference voltage. RSTO2B follows to

VO2 voltage.

RESET DELAY CAPACITOR TERMINALS (CRST1,

CSRT2)

The capacitor which is connected to this terminal decide

delay time to negate Reset signal from exceeding the

reference voltage level.

RESET 1 ADJUSTMENT TERMINAL (RST1ADJ)

Used to adjust the reset level with external resistance

which is connected to VO1 for RSTO1B.

DUTY CONTROL TERMINALS (DTC1, DTC2)

Connected external voltage to this terminal via

capacitance can control the duty of DC/DC converter

switching. Use of the terminal for this is not recommended.

MPC18730EP/R2 Datasheet(PDF) 14 Page - Freescale Semiconductor, Inc

MPC18730EP/R2 Datasheet(HTML) 14 Page - Freescale Semiconductor, Inc

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