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XC6419 Series
Dual LDO Regulator (ch1: 300mA, ch2: 100mA) with ON/OFF Switch
V
OUT
=2.8V
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300
OutputCurrent : I
OUT
[mA]
DropoutVoltage : Vdif [mV]
85℃
25℃
-40℃
1CH最大出力電流
300mA
2CH最大出力電流
100mA
2CH
1CH
GENERAL DESCRIPTION
The XC6419 series is a dual CMOS LDO regulator. The series features high accuracy, low output noise, high
ripple rejection and low dropout and consists of a voltage reference, error amplifier, driver transistor, current limiter,
thermal shutdown circuit and phase compensation circuit. Each output voltage is set independently by laser
trimming and selectable in 0.05V increments within a range of 0.8 to 5.0V.
The EN function turns each output of the two regulators off independently. In this state, the electric charge at the
output capacitor (C
L
) is discharged via the internal auto-discharge switch, and as a result the V
OUT
voltage quickly
returns to the V
SS
level. The output stabilization capacitor (C
L
) is also compatible with low ESR ceramic
capacitors. The high level of output stability is maintained even during frequent load fluctuations, due to the
excellent transient response performance. VR1 and VR2 are completely isolated so that a cross talk during load
fluctuations is minimized.
APPLICATIONS
●Mobile phones
●
Cordless phones, Wireless communication equipment
●Portable games
●Digital still cameras, Digital video cameras
●Portable audio equipment
●PDAs
■FEATURES
Input Voltage Range : 1.5～6.0V
Maximum Output Current : 300mA (ch1), 100mA (ch2)
Output Voltage Range
: 0.8～5.0V
Output Accuracy : ±1% (XC6419A/B)
±20mV@ V
OUT
≦2.0V
±2% (XC6419C/D)
±30mV@ V
OUT
≦1.5V
Dropout Voltage
（V
OUT
=2.8V）
:
115mV＠I
OUT
=200mA (ch1)
115mV＠I
OUT
=50mA (ch2)
Low Power Consumption : 28μA (ch1), 23μA (ch2)
Stand-by Current
: Less than 0.1μA
Ripple Rejection
: 60dB＠f=1kHz
Current Limit : 400mA (ch1), 150mA (ch2)
Low ESR Capacitor
CL High Speed Discharge
Small Packages : USP-6C, SOT-26
TYPICAL APPLICATION CIRCUITS
123
46
5
ETR0338-004
TYPICAL PERFORMANCE
CHARACTERISTICS
Dropout Voltage vs. Output Current
V
OUT
=2.8V
ch2 Maximum Output Current
ch1 Maximum Output Current
Output Current : I
OUT
(mA)
Dropout Voltage
: Vdif (mV)
ch2
ch1
