XC6601_2 Datasheet, PDF (1/33 Pages) Torex Semiconductor – Low Voltage Input LDO Voltage Regulator with Soft-Start Function

XC6601 Series
Low Voltage Input LDO Voltage Regulator with Soft-Start Function
ETR0335_005
■GENERAL DESCRIPTION
The XC6601 series is a low voltage input CMOS LDO regulator which provides highly accurate (±20mV) outputs and can
supply current efficiently due to its ultra low on-resistance even at low output voltages. The series is ideally suited to the
applications which require very low dropout voltage operation and consists of a voltage reference, an error amplifier, a driver
transistor, a current limiter, a fold back circuit, a thermal shutdown (TSD) circuit, an under voltage lock out (UVLO) circuit,
soft-start circuit and a phase compensation circuit.
Output voltage is selectable in 0.05V increments within a range of 0.7V to 1.8V using laser trimming technology and ceramic
capacitors can be used for the output stabilization capacitor (C_L).
The over current protection circuit (the current limiter and the fold back circuit) as well as the thermal shutdown circuit (the
TSD circuit) are built-in. These two protection circuits will operate when either the output current reaches the current limit
level or the junction temperature reaches the temperature limit level.
With the built-in UVLO function, the regulator output is forced OFF when the voltage level at the VBIAS pin or the VIN pin falls
below the UVLO voltage level. With the soft-start function, the inrush current from V_IN to V_OUT for charging C_L at start-up can
be reduced and makes the V_IN stable.
The CE function enables the output to be turned off and the series to be put in stand-by mode resulting in greatly reduced
power consumption. At the time of entering the stand-by mode, the series enables the electric charge at the output capacitor
(C_L) to be discharged via the internal auto-discharge switch which is located between the V_OUT pin and the V_SS pin. As a
result the V_OUT pin quickly returns to the V_SS level.
■APPLICATIONS
●Mobile phones
●Cordless phones
●Wireless communication equipment
●Portable games
●Cameras
●Audio visual equipment
●Portable AV equipment
●PDAs
■FEATURES
Maximum Output Current
Dropout Voltage
Bias Voltage Range
Input Voltage Range
Output Voltage Range
Output Voltage Accuracy
Power Consumption
UVLO
TSD (Detect/Release)
Soft-Start Time
Operating Temperature Range
Function
Low ESR Capacitor
Packages
Environmentally Friendly
: 400mA (Limit:550mA TYP.)
: 38mV@IOUT=100mA (TYP.)
(at VBIAS - VOUT=2.4V)
: 2.5V ~ 6.0V (VBIAS - VOUT≧1.2V)
: 1.0V ~ 3.0V(VIN≦VBIAS)
: 0.7V ~ 1.8V (0.05V increments)
:±20mV
: IBIAS=25μA , IIN=1.0μA (TYP.)
IBIAS=0.01μA , IIN=0.01μA (TYP.)
: VBIAS=2.0V, VIN=0.4V (TYP.)
: 150℃/125℃ (TYP.)
: 240μs @ V_OUT=1.2V (TYP.)
: -40℃ ~ +85℃
: CL High Speed Auto-Discharge
: Ceramic Capacitor Compatible
: USP-6C, SOT-25, SOT-89-5
: EU RoHS Compliant, Pb Free
■ TYPICAL APPLICATION CIRCUIT
●VBIAS =3.6V , VIN =1.8V , VOUT =1.5V
■ TYPICAL PEFORMANCE
CHARACTERISTICS
●Dropout Voltage vs. Output Current
XC6 6 0 1 B1 2 1 MR
300
VBIAS=3.0V
250
VBIAS=3.3V
VBIAS=3.6V
200
VBIAS=4.2V
VBIAS=5.0V
150
Ta=25 [℃]
100
50
0
0
100
200
300
400
　Output Current: IOUT(mA)
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