ACT5830 datasheet(12/41 Pages) ACTIVE-SEMI

12 / 41 page

SYSTEM MANAGEMENT

ACT5830

Rev PrB, 05-Mar-08

Innovative Power

- 12 -

www.active-semi.com

ActivePMU

TM is a trademark of Active-Semi.

2CTM is a trademark of Philips Electronics.

nON

PWR_HOLD

I2C PROGRAMMING

OUT4, OUT5, OUT6

TCXO_EN, RX_EN, TX_EN

nRST

RESET TIMER ENABLE

OUT1

LDO1 ENABLE

VBUCK, OUT2, OUT3

REG, LDO2, LDO3 ENABLE

65ms

CHG_DETECT OR HF_PWR

87% of VREG or VOUT2

PWR_ON (PUSH-BUTTON)

87% of VOUT1

Open Drain Outputs

The ACT5830 includes two n-channel open drain

outputs (OD1 and OD2) that can be used for driving

external loads such as WLEDs or a vibrator motor,

as shown in the functional diagram. Each of the OD

output are enabled when either it's respective ODIx

pin in driven to a logic high.

nACOK Output

The ACT5830's nACOK output provides a logic-level

indication of the status of the voltage at CHG_IN.

nACOK is an open-drain output which sinks current

whenever VCHG_IN > 4V.

Thermal Overload Protection

The ACT5830 integrates thermal overload protection

circuitry to prevent damage resulting from excessive

thermal stress that may be encountered under fault

conditions, for example. This circuitry disables all

regulators if the ACT5830 die temperature exceeds

160°C, and prevents the regulators

from being enabled until the die temperature drops

by 20°C (typ), after which a normal startup routine

may commence.

Figure 2:

Startup and Shutdown Sequence

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