RE031 Datasheet

IC型號：
RE031
PDF描述：
RE031 [Updated 3/03. 10 Pages] A dual mode Low Drop Out (LDO...
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119.28KB
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8頁
芯片廠家：
ETC

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Features

鈥?/div>

Low Quiescent Current, Low Drop Out Voltage Regulator

2.5V Fixed Output Voltage

3V to 5.5V Supply Operation

5 mA Maximum Load Current

Power-down Mode Consumption Less Than 1 碌A(chǔ)

0.35 碌m CMOS Technology

Typical Application: Real Time Clock (RTC), Backup Battery Supply in Mobile

Terminals

鈥?/div>

Maximum Current Consumption 10 碌A(chǔ)

Description

RE031 is a Low Drop Out (LDO) voltage regulator macrocell with a fixed 2.5V output

voltage, rated for loads up to 5 mA. It is designed to be integrated with other analog

cells, digital logic, microcontrollers, 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 internal reference voltage (bandgap voltage) has been

included. The target reference voltage is 1.2V, with a tolerance of 4%, delivered by an

external trimming code. Current reference is generated inside the cell through a circuit

supplied by V

BAT

. The remote sense terminal, V

SAUVS

, provides regulation at the load,

by connecting it together with the output terminal, V

SAUV

,, near a critical point to

improve the regulation performance (e.g., connecting them at the package pin by dou-

ble bonding thus avoiding the bonding resistance influence). A capacitor of 2.2 碌F

connected from V

SAUV

to ground is needed as external compensation.

Figure 1.

Symbol

(1)

Embedded ASIC

Macrocell:

Power

Management for

Mobile

Terminals (PM)

RE031

Fixed 2.5V

5 mA

Low Quiescent

Current

LDO Voltage

Regulator

trimbg20[9:0]

vbat2a

BG020

rst

vsauv

vbg20

vsauvs

vsauvc

gnd2

Note:

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

opened in the design tool environment.

Rev. 2707B鈥揚(yáng)MGMT鈥?3/03

型號

版本

描述

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RE030

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

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RE031 [Updated 3/03. 10 Pages] A dual mode Low Drop Out (LDO...

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