Technology Licensed from International Rectifier APU1205 APU1205-18 / APU1205-25 / APU1205-28 APU1205-30 / APU1205-33 / APU1205-36 300mA ULTRA LOW DROPOUT POSITIVE ADJUSTABLE AND FIXED REGULATORS DESCRIPTION FEATURES SOT-23 Package Stable with 2.2mF Ceramic Capacitor 1% Voltage Reference Accuracy Only 270mV Dropout at 300mA and 170mV Dropout at 150mA 5mA Quiescent Current in Shutdown Current Limit and Thermal Shutdown Logic Input Enable Pin RoHS Compliant The APU1205 device is an efficient linear voltage regulator with better than 1% initial voltage accuracy, very low dropout voltage and very low ground current designed especially for hand held, battery powered applications. Other features of the device are: TTL compatible enable/ shutdown control input, current limiting and thermal shutdown. The APU1205 is available in fixed and adjustable output voltage versions in a small SOT-23 5-Pin package. APPLICATIONS Laptop, Notebook & Palmtop computers Battery Powered Equipments PCMCIA Vcc & Vpp Regulator Consumer Electronics High Efficiency Linear Power Supplies TYPICAL APPLICATION VIN 1 VIN VOUT 5 C1 2.2uF VOUT R1 2 Gnd 3 En ( Vo = 1.253 1+ C2 2.2uF R1 R2 ) R2 SD Enable Adj 4 Figure 1 - Typical application of the APU1205 ajustable voltage regulator. 3.3V 1 VIN 2 Gnd 3 En VOUT 5 2.5V C1 2.2uF SD Enable C2 2.2uF CBYP 4 C3 1000pF Figure 2 - Typical application of the APU1205-25 fixed voltage regulator. 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 5-PIN SOT-23 APU1205Y5 APU1205Y5-18 APU1205Y5-25 APU1205Y5-28 APU1205Y5-30 APU1205Y5-33 APU1205Y5-36 Data and specifications subject to change without notice. OUTPUT VOLTAGE Adj 1.8V 2.5V 2.8V 3.0V 3.3V 3.6V 200724062-1/4 APU1205 APU1205-18 / APU1205-25 / APU1205-28 APU1205-30 / APU1205-33 / APU1205-36 ABSOLUTE MAXIMUM RATINGS Input Voltage (V IN) ..................................................... Enable Input Voltage ................................................. Storage Temperature Range ....................................... Operating Junction Temperature Range ...................... 10V 10V -65°C To 150°C 0°C To 150°C PACKAGE INFORMATION 5-PIN SOT-23 (Y5) 5-PIN SOT-23 (Y5) En Gnd VIN 3 2 En Gnd VIN 1 3 2 1 Fixed Adjustable 4 5 Adj VOUT uJA=2568C/W 4 5 CBYP VOUT uJA=2568C/W ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over CIN=Co=22mF, Io=100mA, VIN(MIN)=2.5V(Adjustable devices) VIN=Vo + 1V(for fixed voltage devices), VOUT=VFB(for adjustable version only), CBYP=470pF(for fixed voltage devices), VENB=2V and TA=258C. Typical values refer to TA=258C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER Reference Voltage (See Table 1 for typical values) Line Regulation Load Regulation (Note 1) SYM Vo Dropout Voltage (Note 2) DVI(O) Ground Current (Note 3) IQ Ground Current-SD Activated Current Limit Thermal Regulation Adjust Pin Current Enable Pin Input LO Voltage Enable Pin Input HI Voltage Enable Pin Input LO Current Enable Pin Input HI Current DVI DVL IQ(SD) ICL DVP IADJ VEN(L) VEN(H) TEST CONDITION (Note 4) Vo + 1V<VIN<10V 1mA<Io<100mA 100mA<Io<300mA Io=100mA Io=100mA (Note 4) Io=50mA Io=50mA (Note 4) Io=150mA Io=150mA (Note 4) Io=300mA Io=300mA (Note 4) VEN =2V, Io=100mA Io=100mA (Note 4) Io=50mA Io=50mA (Note 4) Io=150mA Io=150mA (Note 4) Io=300mA Io=300mA (Note 4) VEN =0V to 0.8V or Open Vo=0V VIN=10V, Io=150mA, 10ms Pulse VIN=2.5V, Vo=VADJ Regulator OFF Regulator ON VEN(L) =0V to 0.8V VEN(H)=2V to VIN MIN -1 -2 320 TYP 0.005 0.8 0.1 10 13 85 100 170 204 270 324 120 240 420 540 2200 2900 7200 9300 5 420 0.05 0.1 MAX UNITS 1 % 2 %/V % 50 70 110 140 220 260 350 400 160 0.01 20 mA 600 2900 9500 0.8 2 mV mA mA %/W mA V V mA mA 2/4 APU1205 APU1205-18 / APU1205-25 / APU1205-28 APU1205-30 / APU1205-33 / APU1205-36 Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum differential voltage between VIN and VOUT required to maintain regulation at VOUT. It is measured when the output voltage drops 1% below its nominal value. Note 3: Ground current is the regulator quiescent current plus the pass transistor current. The total current from the supply is the sum of the load current plus the ground pin current. Note 4: The specification applies for the junction temperature of 0 to +1258C. PIN DESCRIPTIONS PIN # 1 PIN SYMBOL VIN PIN DESCRIPTION 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 minimum drop out voltage during the load transient response. This pin must always be higher than VOUT by at least the amount of the dropout voltage and some margin in order for the device to regulate properly. 2 Gnd Ground pin. This pin must be connected to the lowest potential in the system and all other pins must be at higher potential with respect to this pin. 3 En 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. 4 Adj (Adjustable Only) A resistor divider from this pin to the VOUT pin and ground sets the output voltage. To minimize the error due to the error amplifier, select the values of the resistor dividers to be less than 10KV. 4 CBYP (Fixed Only) A 470 to 1000pF bypass capacitor connected to this pin reduces the output noise. 5 VOUT The output of the regulator. A minimum of 2.2mF with max ESR of 1V capacitor must be connected from this pin to ground to insure stability. 5-PIN SOT-23 APU1205 APU1205-18 APU1205-25 APU1205-28 APU1205-30 APU1205-33 APU1205-36 Output Voltage 1.25V 1.8V 2.5V 2.8V 3.0V 3.3V 3.6V The output voltage of the adjustable device can be set using: ( Vo = 1.253 1+ R1 R2 ) Where: R1 = Resistor connected from output to the Adj pin R2 = Resistor connected from Adj pin to Gnd Table 1- Nominal output voltage vs. part number. 3/4 APU1205 APU1205-18 / APU1205-25 / APU1205-28 APU1205-30 / APU1205-33 / APU1205-36 BLOCK DIAGRAM 5 VOUT VIN 1 Adj 4 THERMAL SHUTDOWN 1.25V + 3 En Gnd 2 Figure 3 - APU1205 Adjustable output block diagram. VIN 1 CBYP 5 VOUT THERMAL SHUTDOWN 4 + 1.25V Gnd 2 3 En Figure 4 - APU1205-18, APU1205-25, APU1205-28, APU1205-30, APU1205-33 and APU1205-36 Fixed output block diagram. 4/4