IRU1205-XX

IRU1205 IRU1205-18 / IRU1205-25 / IRU1205-28 IRU1205-30 / IRU1205-33 / IRU1205-36 Data Sheet No. PD94133 FEATURES SOT-23 Package Stable with 2.2m F Ceramic Capacitor 1% Voltage Reference Accuracy Only 270mV Dropout at 300mA and 170mV Dropout at 150mA 5m A Quiescent Current in Shutdown Current Limit and Thermal Shutdown Logic Input Enable Pin 300mA ULTRA LOW DROPOUT POSITIVE ADJUSTABLE AND FIXED REGULATORS DESCRIPTION The IRU1205 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 IRU1205 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 C1 2.2uF 1 2 VIN VOUT 5 R1 C2 2.2uF R2 VOUT Vo = 1.253 1+ Gnd ( R1 R2 ) SD Enable 3 En Adj 4 Figure 1 - Typical application of the IRU1205 ajustable voltage regulator. 3.3V C1 2.2uF 1 2 VIN VOUT 5 C2 2.2uF 2.5V Gnd SD Enable 3 En CBYP 4 C3 1000pF Figure 2 - Typical application of the IRU1205-25 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 Rev. 2.3 07/16/02 5-PIN SOT-23 (L5) IRU1205CL IRU1205-18CL IRU1205-25CL IRU1205-28CL IRU1205-30CL IRU1205-33CL IRU1205-36CL SOT-23 MARKING AT00 AT18 AT25 AT28 AT30 AT33 AT36 www.irf.com OUTPUT VOLTAGE Adj 1.8V 2.5V 2.8V 3.0V 3.3V 3.6V 1 IRU1205 IRU1205-18 / IRU1205-25 / IRU1205-28 IRU1205-30 / IRU1205-33 / IRU1205-36 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 (L5) En Gnd VIN 3 2 1 3 5-PIN SOT-23 (L5) En Gnd VIN 2 1 AT00 4 5 Adjustable uJA=2568C/W 4 ATxx 5 Fixed uJA=2568C/W Adj VOUT CBYP VOUT ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over C =Co=22m F, Io=100m A, VIN(MIN)=2.5V(Adjustable IN devices) VIN=Vo + 1V(for fixed voltage devices), VOUT=VFB(for adjustable version only), CBYP=470pF(for AT18, AT25, AT28, AT30, AT33 and AT36), 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) Dropout Voltage (Note 2) SYM Vo D VI D VL D VI(O) TEST CONDITION (Note 4) Vo + 1V