IRU1209CSPBF

Data Sheet No. PD94134 revB IRU1206/IRU1207/IRU1208/IRU1209(PbF) 1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS FEATURES DESCRIPTION Low Dropout Voltage (500mV at 1A) 1% Voltage Reference Accuracy Low Ground Current 1µA Maximum Quiescent Current in Shutdown (IRU1207, IRU1208) Fast Transient Response Current Limit and Thermal Shutdown Error Flag Signal for Output out of Regulation (IRU1207, IRU1208) The IRU1206 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 only available and the dropout voltage is less than 1V, exceeding the minimum dropout characteristics of NPN/ PNP hybrid regulators. One common application of these regulators is where input is 3.3V and a 2.5V output is needed. APPLICATIONS Besides the low dropout of less than 0.5V, other features of the family of the parts are: micro-power shutdown capability and output UVLO detection where Flag pin is switched low when output is below 5% of its nominal point. 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 Switch Mode Power Supply (SMPS) TYPICAL APPLICATION VOUT 3 VOUT IRU1206XX Gnd 2 VIN C2 1 VIN C1 Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package. Basic Part (Non Lead-Free) TJ (°C) 2-Pin TO-252 3-Pin (D-PAK) SOT-223 (Y) Lead-Free 8-Pin Plastic SOIC (S) VOLTs Pin Functions 0 To 125 IRU1206-18CD IRU1206-18CY NA NA 1.8V VIN, VOUT, Gnd 0 To 125 IRU1206-25CD IRU1206-25CY NA NA 2.5V VIN, VOUT, Gnd 0 To 125 IRU1206-33CD IRU1206-33CY NA NA 3.3V VIN, VOUT, Gnd 0 To 125 NA NA IRU1207-18CS IRU1207-18CSPbF 1.8V VIN, VOUT, Gnd, Enable, Flag 0 To 125 NA NA IRU1207-25CS IRU1207-25CSPbF 2.5V VIN, VOUT, Gnd, Enable, Flag 0 To 125 NA NA IRU1207-33CS IRU1207-33CSPbF 3.3V VIN, VOUT, Gnd, Enable, Flag 0 To 125 NA NA IRU1208CS IRU1208CSPbF Adj VIN, VOUT, Gnd, Flag, Adj 0 To 125 NA NA IRU1209CS IRU1209CSPbF Adj VIN, VOUT, Gnd, Enable, Adj www.irf.com 1 IRU1206/IRU1207/IRU1208/IRU1209(PbF) 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 2-PIN PLASTIC TO-252 (D-Pak) IRU1206 3-PIN PLASTIC SOT-223 (Y) IRU1206 FRONT VIEW TOP VIEW 3 VOUT Tab is Gnd 1 θJA=70°C/W for 0.5" Sq pad VIN 8-PIN PLASTIC SOIC (S) IRU1208 IRU1207 1 8 2 7 3 6 4 5 Gnd Gnd Gnd Gnd θJA=55°C/W for 1" Sq pad Flag VIN VOUT Adj 1 8 2 7 3 6 4 5 Gnd Gnd Gnd Gnd θJA=55°C/W for 1" Sq pad 3 VOUT 2 Gnd 1 VIN θJA=90°C/W for 0.4" Sq pad IRU1209 TOP VIEW TOP VIEW TOP VIEW Enable VIN VOUT Flag Tab is Gnd Enable VIN VOUT Adj 1 8 2 7 3 6 4 5 Gnd Gnd Gnd Gnd θJA=55°C/W for 1" Sq pad ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over CIN=COUT=10µF, 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 is used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER Initial Voltage Accuracy (see Table 1 for nominal values) Line Regulation Load Regulation (Note 1) SYM Vo Output Voltage Temp Coef. Dropout Voltage (Note 2) ∆VO(T) ∆VI(O) Io=100mA (Note 4) Io=500mA (Note 4) Io=1000mA (Note 4) IQ VIN=Vo + 1 for all conditions: Io=100mA (Note 4) Io=500mA (Note 4) Io=1000mA (Note 4) ICL Vo=5% Below Regulation Point VIN(min) Ground Current (Note 3) Current Limit Minimum Input Voltage IRU1208, IRU1209 Adjust Pin Current Minimum Load Current 2 ∆VI ∆VL IADJ IO(min) TEST CONDITION Io=10mA, TA=25 C (Note 4) Vo + 1V