XC6602 Series

1A, 0.5V Input Voltage, High Speed LDO Regulator

The XC6602 series is a low voltage input (0.5V) with bias voltage 2.5V 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 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, 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). The XC6602 series optimizes the rise time internally with a built-in soft-start function.

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.

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Typical Application Circuit


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
Ripple Rejection 60dB@f=1kHz(VBIAS_PSRR),75dB@f=1kHz(VIN_PSRR)
Quiescent Current 100μA(VBIAS),6.5μA@VOUT=1.2V(VIN)
Stand-by Current 0.01μA(VBIAS),0.01μA(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
Operating Ambient Temperature -40℃~85℃
Capacitor Low ESR Ceramic(2.2μF)
Environmentally Friendly EU RoHS compliant, Pb free



Technical Document

Quality Reports


QuestionWhat is a big difference between XC6602 and other high speed regulators?

Most high speed regulators use a Pch MOSFET as the transistor, which tends to have a large on-resistance for a low VIN and does not allow the VIN below the minimum operating voltage of the IC. XC6602 adopts an Nch MOSFET as the driver transistor to realize the low-input voltage operation and ultralow on-resistance.

QuestionWhat is the more efficient usage of XC6602?

It can more efficiently output a large current with a lower input-output dropout voltage to step down the input voltage by a DC/DC converter and branch the output to use of XC6602 as the core power source of the LSI, than to directly introduce the voltage from a high speed regulator. For example, if you want to get 1.5V from 3.6V for the core power source of the LSI, you can efficiently output a large current by stepping it down to 1.8V at first by the DC/DC converter with high efficiency and branching the 1.8V by use of the XC6602 series. It is about 35% more efficient than directly introducing the 1.5V from a high speed regulator.