US1206/1207/1208/1209 1A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE & FIXED REGULATOR PRELIMINARY DATASHEET FEATURES DESCRIPTION Low Droput Voltage (500mV at 1A) 1% Voltage Reference Accuracy Low Ground Current 10uA Quiescent Current in Shutdown (US1207,1208) Fast Transient Response Current Limit and Thermal Shutdown Error Flag Signal for Output out of Regulation (US1207,1209) Pin Compatible with MIC39100/101/102 series The US1206 family of devices are ultra low dropout 1A regulators using PNP transistor as the pass element. These products are ideal when a single input supply is available only and the dropout voltage is less than 1V, exceeding the minimum dropout characteristics of NPN/ PNP hybrid regulators. One common application of these regulators are where input is 3.3V and a 2.5V output is needed. Besides the low dropout of less than 0.5V, other features of the family of the parts are; micropower shutdown capability and output UVLO detection where Flag pin is switched low when output is below 5% of its nominal point. The US1206-XX in SOT223 is pin compatible with MIC39100-XX, US1207 and 1209 in SO8 power package are compatible with MIC39101 and 39102 respectively. APPLICATIONS 2.5V Supply from 3.3V Input for the new generation of Logic ICs Computer Mother Board, Add on Cards High Efficiency Post Regulator in SMPS TYPICAL APPLICATION US1206-XX Vout 3 Gnd 2 Vin 1 Vout C2 1206app1-1.0 Vin C1 PACKAGE ORDER INFORMATION Tj (°C) 0 TO 125 0 TO 125 0 TO 125 0 TO 125 0 TO 125 0 TO 125 0 TO 125 0 TO 125 Rev. 1.1 6/26/00 3 LEAD TO252 US1206-18CD US1206-25CD US1206-33CD NA NA NA NA NA 5 LEAD TO263 US1206-18CY US1206-25CY US1206-33CY US1207-18CM US1207-25CM US1207-33CM US1208CM US1209CM 8 PIN PLASTIC SOIC Power US1206-18CM US1206-25CM US1206-33CM US1207CS US1207CS US1207CS US1208CS US1209CS Voltage 1.8V 2.5V 3.3V 1.8V 2.5V 3.3V Adj Adj Pin Functions Vin, Vout, GND Vin, Vout, GND Vin, Vout, GND Vin, Vout, GND, Enable, Flag Vin, Vout, GND, Enable, Flag Vin, Vout, GND, Enable, Flag Vin, Vout, GND, Flag, Adj Vin, Vout, GND, Adj, Enable 2-1 US1206/1207/1208/1209 ABSOLUTE MAXIMUM RATINGS Input Voltage (Vin) ............................................................. 12V Enable Input Voltage ........................................................... 12V Storage Temperature Range ................................ -65°C TO 150°C Operating Junction Temperature Range ...................... 0°C TO 135°C PACKAGE INFORMATION 5 PIN PLASTIC TO263 ( M ) or 5 PIN POWER FLEX (P) US1207 US1208 US1209 FRONT VIEW FRONT VIEW Flag Vout Gnd Vin Enable 5 4 3 2 1 4 3 2 1 4 3 2 1 8 2 7 3 6 4 5 Gnd Gnd Gnd Gnd Flag Vin Vout Adj Tab is Gnd 8 2 7 3 6 4 5 Gnd Gnd Gnd Gnd Enable Vin Vout Adj Gnd 1 Vin 1 8 2 7 3 6 4 5 Gnd Gnd Gnd Gnd θJA=55°C/W for 1" Sq pad 3 PIN PLASTIC SOT223 ( Y ) US1206 TOP VIEW Vout θJA=70°C/W for 0.5" Sq pad 1 2 TOP VIEW 1 4 Vout US1209 3 PIN PLASTIC TO252 ( D ) US1206 FRONT VIEW 3 3 θJA=35°C/W for 0.5" square pad TOP VIEW 1 Adj Vout Gnd Vin Enable 5 θJA=35°C/W for 0.5" square pad 8 PIN PLASTIC POWER SOIC ( S ) US1207 US1208 Enable Vin Vout Flag FRONT VIEW FRONT VIEW Adj Vout Gnd Vin Flag 5 TOP VIEW 3 PIN PLASTIC TO263 ( M ) US1206-XX Vin Tab is Gnd 3 Vout 2 Gnd 1 θJA=90°C/W for 0.4" Sq pad Vin ELECTRICAL SPECIFICATIONS Unless otherwise specified ,these specifications apply over ,Cin=Cout=10uF,Vin=Vo+1V, Vout=Vfb (for adjustable version only), and Ta=25 °C. Typical values refer to Ta=25 °C.Low duty cycle pulse testing are used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS Reference Voltage Vo Io=10mA -1 1 % See Table 1 for typical values (Note 4) -2 2 Line Regulation dVi Vo+1V<Vin<12 0.06 %/V Load Regulation (note 1) dVL 10mA<Io<1A 0.7 % 1mA<Io<150mA 0.5 % Output voltage Temp Coef. dVoT 20 100 ppm/°C Dropout Voltage (note 2) dVio Io=100mA (Note 4) 100 200 mV Io=500mA (Note 4) 300 400 mV Io=1000mA (Note 4) 500 650 mV Ground Current (Note 3) Iq Vin=Vo +1 Io=100mA (Note 4) 3 mA Io=500mA (Note 4) 15 mA Io=1000mA (Note 4) 50 mA Current Limit Icl Vo=0V 1.1 A Minimum Input Voltage Vinmin 2.1 2.3 V US1208,1209 Adjust Pin Current Iadj Vin=2.5V,Vo=Vadj (Note 4) 0.1 uA Minimum Load Current Iomin 1 mA 2-2 Rev. 1.1 6/26/00 US1206/1207/1208/1209 US1207,1208 Ground Current-S.D Activated Enable pin input LO voltage Enable pin input HI voltage Enable pin input LO current Enable pin input HI current US1207,1209 Flag Output Threshold Voltage Flag Output Hysterises Voltage Flag Output Saturation Voltage SYM Iqsd Venl Venh TEST CONDITION Enable=0V Regulator OFF (Note 4) Regulator ON (Note 4) Venl=0V to 0.8V (Note 4) Venh=2V to Vin (Note 4) MIN TYP MAX 0.01 1 0.8 UNITS uA V V uA uA 2 0.1 100 2 600 Vthfg Vhys Vfsat 3.8 %Vo Output Ramping Up 0.8 %Vo Io=5mA 400 mV Io=500uA 230 mV Note 1 : Low duty cycle pulse testing with Kelvin con- Note 3 : Ground current is the the regulator quiescent nections are required in order to maintain accurate data. current plus the pass transistor current. The total curNote 2 : Drop-out voltage is defined as the minimum rent from the supply is the sum of the load current plus differential voltage between Vin and Vout required to main- the ground pin current. tain regulation at Vout. It is measured when the output Note 4 : The specification applies for the junction temvoltage drops 1% below its nominal value. perature of 0 to +125°C. Pin DescRIPTIONS PIN DESCRIPTION A resistor divider from this pin to the Vout pin and ground sets the output voltage. An open collector output that switches low when the output voltage drops about 4% below its expected regulated voltage. The output of the regulator .A minimum of 2.2uF capacitor must be connected from this pin to ground. Ground pin. This pin must be connected to the lowest potential in the system & all other pins must be at higher potential with respect to this pin. Enable pin. A low signal or left open on this pin shuts down the output.This pin must be tied HI or to Vin for normal operation. The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimumdrop out voltage during the load transient response. This pin must always be 0.6V higher than Vout in order for thedevice to regulate properly. PIN SYMBOL Adj US1208,1209 Flag US1208 Vout All devices GND All devices Enable US1207,1209 Vin All devices Part Number US1206-18 US1206-25 US1206-33 US1207-18 US1207-25 US1207-33 US1208 US1209 Output Voltage 1.8V 2.5V 3.3V 1.8V 2.5V 3.3V 1.24V 1.24V APPLICATION INFORMATION Stability The US120X series of regulators require the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. A minimum of 2.2uF capacitance and the ESR in the range of 0.5 to 2 ohm insures the stability of the system. Table 1- Output voltage v.s. part number Rev. 1.1 6/26/00 2-3 US1206/1207/1208/1209 TYPICAL APPLICATION US1206-XX Vout 3 Gnd 2 Vin 1 Vout C2 1206app1-1.0 Vin C1 Figure 1- Typical application of US1206 Ref Desig C1 C2 2-4 Description Capacitor Capacitor Qty 1 1 Part # 10uF, Tantalum 10uF, Tantalum Manuf AVX AVX Rev. 1.1 6/26/00 US1206/1207/1208/1209 TYPICAL APPLICATION Flag 5 Vout 4 Error Flag Vout R1 US1207 Gnd 3 Vin 2 Enable 1 C2 1207app1-1.0 S.D. Enable Vin Pin numbers in this schematic apply only to TO263(M) package. C1 Figure 1- Typical application of US1207 Ref Desig C1 C2 R1 Rev. 1.1 6/26/00 Description Capacitor Capacitor Resistor Qty 1 1 1 Part # 10uF, Tantalum 10uF, Tantalum 10kΩ , 5% Manuf AVX AVX Panasonic 2-5 US1206/1207/1208/1209 TYPICAL APPLICATION Adj 5 Vout 4 Vout R1 US1208 Gnd 3 Vin 2 Flag 1 C2 R2 R3 1208app1-1.1 Error Flag Vo= 1.24 X (1 + R1/R2) Vin C1 Pin numbers in this schematic apply only to TO263(M) package. Figure 2- Typical application of US1208 in 3.3V to 2.5V regulator Ref Desig C1 C2 R1 R2 2-6 Description Capacitor Capacitor Resistor Resistor Qty 1 1 1 1 Part # 10uF, Tantalum 10uF, Tantalum 127Ω , 1% 124Ω , 1% Manuf AVX AVX Rev. 1.1 6/26/00 US1206/1207/1208/1209 TYPICAL APPLICATION Adj 5 Vout 4 Vout R1 US1209 Gnd 3 Vin 2 Enable 1 C2 R2 1209app1-1.1 S.D. Enable Vo= 1.24 X (1 + R1/R2) Vin C1 Pin numbers in this schematic apply only to TO263(M) package. Figure 2- Typical application of US1209 in 3.3V to 2.5V regulator Ref Desig C1 C2 R1 R2 R3 Rev. 1.1 6/26/00 Description Capacitor Capacitor Resistor Resistor Resistor Qty 1 1 1 1 1 Part # 10uF, Tantalum 10uF, Tantalum 127Ω , 1% 124Ω , 1% 10kΩ , 5% Manuf AVX AVX 2-7