1A, 0.5V Low Input Voltage, High Speed LDO Regulator (Adjustable Current Limit)

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 (CL). 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 ILIM 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 (CL) to be discharged via the internal switch. As a result the VOUT pin quickly returns to the VSS level. The CE pull-down function keeps the IC to be in stand-by mode even if the CE pin is left open.

Feature

MaximumOutput Current 1A(1.3ALimit)
On Resistance 0.15Ω@VBIAS=3.6V,VOUT=1.2V
Bias Voltage Range 2.5V~6.0V
Input Voltage Range 0.5V~3.0V
Output Voltage Range 0.5V~1.8V(0.1V increments)
Output VoltageAccuracy ±0.015V@VOUT<1.2V
±0.020V@VOUT≧1.2V
Ripple Rejection 60dB@f=1kHz(VBIAS_PSRR)
75dB@f=1kHz(VIN_PSRR)
Quiescent Current 100μA(VBIAS),6.5μA(VIN)@VOUT=1.2V
Stand-by Current 0.01μA(VBIAS),0.01μA(VIN)
UVLO 1.8V(VBIAS),0.4V(VIN)
TSD 150℃@Detect,125℃@Release
Protection Circuits Foldback Current Limit,TSD,UVLO
Functions Adjustable Soft-start time with an external component
CE Pull-Down (Active High)
CL Auto Discharge
Capacitor Low ESR Ceramic(2.2μF)
Operating Ambient Temperature -40℃~+85℃
Environmentally Friendly EU RoHS compliant, Pb free

Typical Application Circuit

Technical Document

Packages

Package Number of Pins Pcs/Reel Package Size(mm)
SOT-26W 6 3,000 2.8 x 2.9 x 1.3
USP-6C 6 3,000 1.8 x 2.0 x 0.6

XC6604 Series Part Numbers

Part number Sample Type Output Voltage Output Voltage Accuracy Packages EDA Online Store
XC6604A051ER-G With Soft-start, Adjustable Current Limit with an external resistor 0.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A051MR-G With Soft-start, Adjustable Current Limit with an external resistor 0.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A061ER-G With Soft-start, Adjustable Current Limit with an external resistor 0.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A061MR-G With Soft-start, Adjustable Current Limit with an external resistor 0.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A071ER-G With Soft-start, Adjustable Current Limit with an external resistor 0.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A071MR-G With Soft-start, Adjustable Current Limit with an external resistor 0.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A081ER-G With Soft-start, Adjustable Current Limit with an external resistor 0.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A081MR-G With Soft-start, Adjustable Current Limit with an external resistor 0.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A091ER-G With Soft-start, Adjustable Current Limit with an external resistor 0.9V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A091MR-G With Soft-start, Adjustable Current Limit with an external resistor 0.9V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A101ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.0V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A101MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.0V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A111ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.1V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A111MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.1V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A121ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.2V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A121MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.2V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A131ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.3V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A131MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.3V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A141ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.4V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A141MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.4V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A151ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A151MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A161ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A161MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A171ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A171MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604A181ER-G With Soft-start, Adjustable Current Limit with an external resistor 1.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604A181MR-G With Soft-start, Adjustable Current Limit with an external resistor 1.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B051ER-G Without Soft-start, Adjustable Current Limit with an external resistor 0.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B051MR-G Without Soft-start, Adjustable Current Limit with an external resistor 0.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B061ER-G Without Soft-start, Adjustable Current Limit with an external resistor 0.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B061MR-G Without Soft-start, Adjustable Current Limit with an external resistor 0.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B071ER-G Without Soft-start, Adjustable Current Limit with an external resistor 0.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B071MR-G Without Soft-start, Adjustable Current Limit with an external resistor 0.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B081ER-G Without Soft-start, Adjustable Current Limit with an external resistor 0.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B081MR-G Without Soft-start, Adjustable Current Limit with an external resistor 0.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B091ER-G Without Soft-start, Adjustable Current Limit with an external resistor 0.9V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B091MR-G Without Soft-start, Adjustable Current Limit with an external resistor 0.9V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B101ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.0V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B101MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.0V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B111ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.1V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B111MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.1V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B121ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.2V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B121MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.2V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B131ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.3V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B131MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.3V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B141ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.4V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B141MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.4V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B151ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B151MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.5V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B161ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B161MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.6V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B171ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B171MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.7V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W
XC6604B181ER-G Without Soft-start, Adjustable Current Limit with an external resistor 1.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) USP-6C
XC6604B181MR-G Without Soft-start, Adjustable Current Limit with an external resistor 1.8V ±0.015V(VOUT<1.2V),±0.020V(VOUT≧1.2V) SOT-26W

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