XC6501P491NR datasheet, PDF - EEWORLD Datasheet

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XC6501P491NR: DescriptionOutput Capacitor-Less, Low Power Consumption, High Speed LDO Regulator; File Size498KB，21 Pages; Manufacturer

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XC6501P491NR Overview

Output Capacitor-Less, Low Power Consumption, High Speed LDO Regulator

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XC6501

■GENERAL

DESCRIPTION

ETR0337-003

Output Capacitor-Less, Low Power Consumption, High Speed LDO Regulator

The XC6501 series is a 6.0V high speed, low noise CMOS LDO regulator that can provide stable output voltages within a range

of 1.2V to 5.0V (0.05V increments) even without a load capacitor C

. This is possible because phase compensation is carried

out internally unlike other LDOs where it is done externally. The series consists of a reference voltage source, driver transistor,

error amplifier, current limit circuit, and phase compensation circuit.

The CE function enables the circuit to be put into stand-by mode by inputting a low level signal to the CE pin thereby reducing

current consumption from an already low 13μA (in operation) to less than 0.1μA. In the stand-by mode, if a C

cap is used, the

electric charge stored at C

can be discharged via the internal auto-discharge switch and as a result, the V

OUT

pin quickly returns

to the V

level.

The current limit fold-back circuit operates as a short circuit protection and a current limiter function for the output pin.

■APPLICATIONS

●Mobile

phones

（RF,

Digital cash, I/O etc.）

●Portable

games

●Camera

modules

●Wireless

LAN modules

●LCD

modules

●Bluetooth

●Digital-TV

tuners

■FEATURES

Operating Voltage Range

Output Voltage Range

Dropout Voltage

Low Power Supply

Stand-by Current

Ripple Rejection

Protection Circuits

Output capacitor is not required

CL High Speed Auto Discharge

Packages

USP-3, USP-4

SSOT-24, SOT-25

1.4½6.0V

2.0½5.0V（Accuracy:±1%）

1.2½1.95V（Accuracy:±0.02V）

150mV＠I

OUT

=100mA,

OUT

=2.8V

13μA＠V

OUT

=2.8V

Less than 0.1μA

50dB＠f=1kHz,V

OUT

=2.8V

Current limit

（300mA,

TYP.）

Short circuit protection

Internal phase compensation

■TYPICAL

APPLICATION CIRCUIT

■TYPICAL

PERFORMANCE

CHARACTERISTICS

XC6501 Series

Ta=25

℃

,tr=tf=5μs

=0.1μF (ceramic)

3.2

(V)

3.0

2.8

2.6

2.4

2.2

2.0

Time (40μs/div)

Output Current

300

Output Current: I

OUT

(mA)

Without C

無し

=1.0μF

250

200

150

100

Output Voltage: V

OUT

1/21

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