XC6603 Datasheet, PDF (1/29 Pages) Torex Semiconductor – 1A, 0.5V Low Input Voltage, High Speed LDO Regulator

XC6603 Series
ETR03070-002
1A, 0.5V Low Input Voltage, High Speed LDO Regulator
（Adjustable Soft-start time with an external component）
■GENERAL DESCRIPTION
The XC6603 series is a low voltage input (0.5V) operation and provides high accuracy ±15mV / ±20mV and can supply large
current efficiently due to its ultra low on-resistance even at low output voltages.
The series is ideally suited to the applications which require high current in low input/output voltages and consists of a N-ch
driver transistor, a voltage reference, an error amplifier, a current limiter, a foldback circuit, a thermal shutdown (TSD) circuit, an
under voltage lock out (UVLO) circuit, a soft-start circuit and a phase compensation circuit.
Output voltage is selectable in 0.1V increments within a range of 0.5V to 1.8V using laser trimming technology and ceramic
capacitors can be used for the output stabilization capacitor (C_L). The inrush current (I_RUSH) from V_IN to V_OUT for charging C_L at
start-up can be reduced and makes the V_IN stable. Soft-start time can be adjustable with connecting a capacitor to the SS pin.
The inrush current conflicts with the soft-start time, therefore if soft-start is set longer, the inrush current is decreased.
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 switch. As a result the V_OUT pin quickly returns to the V_SS level.
The CE pull-down function keeps the IC to be in stand-by mode even if the CE pin is left open.
■APPLICATIONS
● Smart phones / Mobile phones
● Digital still cameras / Camcorders
● Note PCs / Tablet PCs
● E-book Readers / Electronic dictionaries
● Wireless LAN
■TYPICAL APPLICATION CIRCUIT
■FEATURES
Maximum Output Current
ON Resistance
Bias Voltage Range
Input Voltage Range
Output Voltage Range
Output Voltage Accuracy
Ripple Rejection
Low Power Consumption
Stand-by Current
Under-voltage Lockout
Thermal Shutdown
Protection Circuit
Function
Output Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
: 1A (1.3A Limit)
: 0.15Ω＠V_BIAS=3.6V, V_OUT=1.2V
: 2.5V～6.0V
: 0.5V～3.0V
: 0.5V～1.8V (0.1V increments)
: ±0.015V＠V_OUT＜1.2V
±0.020V＠V_OUT≧1.2V
: 60dBï¼ f=1kHz (V_{BIAS_PSRR})
75dBï¼ f=1kHz (V_{IN_PSRR})
: 100μA (V_BIAS), 6.5μA (V_IN)＠V_OUT=1.2V
: 0.01μA (V_BIAS), 0.01μA (V_IN)
: 1.8V (VBIAS), 0.4V (VIN)
: 150℃＠detect, 125℃＠release
: Foldback Current Limit, TSD, UVLO
: Adjustable Soft-start time with an external component
CE Pull-Down (Active High)
C_L Auto Discharge
: Ceramic Capacitor Compatible (2.2μF)
: -40℃～+85℃
: USP-6C, SOT-26W
: EU RoHS Compliant, Pb Free
■TYPICAL PERFORMANCE
CHARACTERISTICS
XC6603A121xR-G
V_BIAS=3.6V, V_CE=0V→3.6V(tr=5μs), V_IN=1.5V
I_OUT=100mA, C_BIAS=C_IN=1.0μF, C_L=2.2μF, Ta=25℃
4
4
CE Input Voltage
2
3
0
2
Output Voltage
-2
1
-4
0
-6
-1
Time (1ms/div)
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