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XC6501D38ANR

Description
Output Capacitor-Less, Low Power Consumption, High Speed LDO Regulator
File Size498KB,21 Pages
Manufacturer
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XC6501D38ANR Overview

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

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
L
. 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
L
cap is used, the
electric charge stored at C
L
can be discharged via the internal auto-discharge switch and as a result, the V
OUT
pin quickly returns
to the V
SS
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,
V
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
C
IN
=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
L
C
L
無し
C
L
=1.0μF
250
200
150
100
50
0
Output Voltage: V
OUT
1/21
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