Details, datasheet, quote on part number: XC6601B171MR
DescriptionLow Voltage Input LDO Voltage Regulator with Soft-start Function
CompanyTorex Semiconductor
DatasheetDownload XC6601B171MR datasheet


Features, Applications
Low Voltage Input LDO Voltage Regulator with Soft-Start Function 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 to 1.8V using laser trimming technology and ceramic capacitors can be used for the output stabilization capacitor (CL). 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 VIN to VOUT for charging CL at start-up can be reduced and makes the VIN 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 (CL) to be discharged via the internal auto-discharge switch which is located between the VOUT pin and the VSS pin. As a result the VOUT pin quickly returns to the VSS level.


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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

400mA (Limit:550mA TYP.) : 38mV@IOUT=100mA (TYP.) (at VBIAS ~ 6.0V (VBIAS 1.8V (0.05V increments) , IIN=1.0A (TYP.) , IIN=0.01A (TYP.) VBIAS=2.0V, VIN=0.4V (TYP.) : 150/125 (TYP.) @ VOUT=1.2V (TYP.) CL High Speed Auto-Discharge : Ceramic Capacitor Compatible SOT-25, SOT-89-5


package is recommended to solder as the recommended mount pattern and metal mask pattern for mounting strength. This pad should be electrically opened or connected to the VBIAS (No.1) pin.

PIN NUMBER SOT-25 SOT-89-5 PIN NAME VBIAS VIN VOUT VSS CE FUNCTION Power Supply Input Driver Transistor Input Output Ground ON/OFF Control

: CE High Active, Soft-Start Function Built-in, CL Auto Discharge Function

SYMBOL B MR DESCRIPTION Pull-Down Resistor Built-in No Pull-Down Resistor Built-in e.g.) VOUT(T)=1.2V=1,=2 0.1V increments e.g.) 1.2V=1,=2,=1 0.05V increments e.g.) 1.25V=1,=2,=B SOT-25 (Halogen & Antimony free) USP-6C (Halogen & Antimony free) SOT-89-5

DESCRIPTION Type of Regulators Output Voltage Output Voltage Type

The "-G" suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant. The device orientation is fixed in its embossed tape pocket. For reverse orientation, please contact your local Torex sales office or representative. (Standard orientation: R-, Reverse orientation: L-)

Under Voltage Lock Out CE/ Thermal Protection Current Limit R1
*Diodes inside the circuit are an ESD protection diode and a parasitic diode.


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