XC6604 Datasheet, PDF (1/30 Pages) Torex Semiconductor – 0.5V Low Input, 1A High Speed LDO Regulator with Adjustable Current Limit

XC6604 Series
ETR03071-002
0.5V Low Input, 1A High Speed LDO Regulator with Adjustable Current Limit
■GENERAL DESCRIPTION
The XC6604 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 fold-back 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). When the output current reaches the current limit, the output
voltage drops as well as the output current is decreased as a function of the foldback circuit. The current limit can be
adjustable with connecting a resistor to the I_LIM pin.
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
■FEATURES
Maximum Output Current
: 1A (1.3A Limit)
ON Resistance
Bias Voltage Range
: 0.15Ω＠V_BIAS=3.6V, V_OUT=1.2V
: 2.5V～6.0V
Input Voltage Range
: 0.5V～3.0V
Output Voltage Range
: 0.5V～1.8V (0.1V increments)
Output Voltage Accuracy
: ±0.015V＠V_OUT＜1.2V
Ripple Rejection
±0.020V＠V_OUT ≧1.2V
: 60dBï¼ f=1kHz (V_{BIAS_PSRR})
75dBï¼ f=1kHz (V_{IN_PSRR})
Low Power Consumption
: 100μA (V_BIAS), 6.5μA (V_IN)＠V_OUT=1.2V
Stand-by Current
: 0.01μA (V_BIAS), 0.01μA (V_IN)
Under-voltage Lockout
: 1.8V (VBIAS), 0.4V (VIN)
Thermal Shutdown
: 150℃＠detect, 125℃＠release
Protection Circuit
: Foldback Current Limit, TSD, UVLO
Function
: Soft-start
CE Pull-Down (Active High)
C_L High Speed Discharge
Operating Ambient Temperature : -40℃～+85℃
Output Capacitor
: Ceramic Capacitor Compatible (2.2μF)
Packages
: USP-6C, SOT-26W
Environmentally Friendly
: EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.0
XC6604x121MR-G
V_BIAS=V_CE=3.6V, V_IN=1.5V
C_BIAS=C_IN=1.0μF, C_L=2.2μF, Ta=25℃
RLIM2=0kΩ
RLIM2=22kΩ
RLIM2=56kΩ
RLIM2=120kΩ
0.5
1.0
1.5
Output Current: I_OUT(A)
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