RE030 Datasheet

IC型號：
RE030
PDF描述：
RE030 [Updated 3/03. 12 Pages] RE030 is a dual mode Low Drop...
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ETC

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Features

鈥?/div>

Dual Mode Low Drop Out Voltage Regulator

Programmable Output Voltage Ranging from 1.75V to 2.1V

3V to 5.5V Supply Operation

180 mA Maximum Load Current in Full Power Mode

Maximum Current Consumption 70 碌A in Full Power Mode and 15 碌A in Low Power Mode

Power-down Mode Consumption Less Than 1 碌A

More Than 70dB (Typical) PSRR at 1 KHz

77 碌V

RMS

Output Noise in Full-power Mode

0.35 碌m CMOS Technology

Typical Application: Baseband Section Supply in Mobile Terminals

Description

RE030 is a dual mode Low Drop Out (LDO) voltage regulator macrocell with program-

mable output voltage ranging from 1.75V to 2.1V, rated for loads up to 180 mA in full

power mode and 5 mA in low power mode. (Both modes can be selected by the LP9

signal.) It is designed to be integrated with other analog cells, digital logic, microcon-

trollers, DSP cores and memory blocks into system-on-chip products.

The circuit consists of a PMOS pass device, an error amplifier and a feedback resis-

tive network, sized to achieve the required closed loop gain. These blocks make up

the regulating loop. An over-current and short circuit protection circuit has been

included to limit the output current delivered by the regulator, thus avoiding destruction

in case of a short circuit.

An external reference voltage V

(bandgap voltage) is necessary for correct function-

ality. The target reference voltage is 1.231V delivered, for example, by BG019. Double

pads on the supply voltage V

BAT1A

BAT1AA

and output voltage V

COREA

COREAA

are

used to reduce the total output resistance. Current reference is generated inside the

cell through a circuit supplied by a 2.5V 鹵 0.1V of regulated input voltage on V

SAUVC

Remote sense terminal V

CORES

provides regulation of the load by connecting it to the

output terminal near a critical point to improve performance of the regulator (e.g., con-

necting it to the package pin by double-bonding, thus avoiding the bonding resistance

influence). A ceramic capacitor of 2.2 碌F connected from V

COREA

COREAA

to ground is

needed as external compensation.

Figure 1.

Symbol

(1)

Embedded ASIC

Macrocell:

Power

Management for

Mobile

Terminals (PM)

RE030

1.75V to 2.1V

180 mA

Dual Mode LDO

Regulator

Note:

1. Pin names are written as they appear on the user screen when the symbol is

opened in the design tool environment.

Rev. 2706B鈥揚MGMT鈥?3/03

型號

版本

描述

廠商

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RE030

英文版

RE030 [Updated 3/03. 12 Pages] RE030 is a dual mode Low Drop...

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