L387A

L387A ® VERY LOW DROP 5V REGULATOR WITH RESET .. .. . PRECISE OUTPUT VOLTAGE (5 V ± 4 %) VERY LOW DROPOUT VOLTAGE OUTPUT CURRENT IN EXCESS OF 500mA POWER-ON, POWER-OFF INFORMATION (RESET FUNCTION) HIGH NOISE IMMUNITY ON RESET DELAY CAPACITOR DESCRIPTION The L387A is a very low drop voltage regulator in a Pentawatt® package specially designed to provide stabilized 5V supplies in consumer and industrial applications. Thanks to its very low input/output voltage drop this device is very useful in battery powered equipment, reducing consumption and prolonging battery life. A reset output makes the L387A particularly suitable for microprocessor systems. This output provides a reset signal when power is applied (after an external programmable delay) and goes low when ABSOLUTE MAXIMUM RATINGS Symbol Vi Tj, Tstg (t s) Parameter D.C. Input Voltage uc Pentawatt® c u d o r P ORDERING NUMBER : L387A e t le power is removed, inhibiting the microprocessor. An hysteresis on reset delay capacitor raises the immunity to the ground noise. o s b O - Junction and Storage Temperature Range ) s t( Value 35 Unit V –55 to 150 °C d o r P e APPLICATION CIRCUIT t e l o s b O * Min 33 µF and max. ESR ≤ 3 Ω over temperature range. July 2003 1/6 L387A PIN CONNECTION (Top views) BLOCK DIAGRAM c u d e t le ) s ( ct Rth t e l o j-c a s e s b O 2/6 o r P o s b O - u d o r P e THERMAL DATA ) s t( Thermal Resistance Junction-case Max 4 °C/W L387A ELECTRICAL CHARACTERISTICS (refer to the test circuit, Vi = 14.4 V, Tj = 25 °C, Co = 100 µF; unless otherwise specified) Symbol Parameter Output Voltage Vo Operating Input Voltage Test Conditions Io = 5 mA to 500 mA Tj = 25 °C – 40 ≤ Tj ≤ 125 °C (*), Over Full T Range (– 40 to 125 °C) (see note **) VI ∆Vo Line Regulation Vi = 6 V to 26 V ∆Vo VI – Vo Load Regulation Io = 5 mA to 500 mA Dropout Voltage VO = V O NOM – 100 mV Io = 350 mA Io = 500 mA Quiescent Current Iq Vi = 6.2 V Typ. 5.00 5.00 Max. 5.20 5.25 26 Unit V V V 5 50 mV 15 60 mV 0.40 0.60 0.65 0.8 V V Io = 0 mA Io = 150 mA Io = 350 mA Io = 500 mA 5 20 60 100 15 35 100 160 mA mA mA mA Io = 500 mA 160 – 0.5 180 mA mV/°C Io = 5 mA ∆ Vo ∆T SVR Temperature Output Voltage Drift ISC Output Short Circuit Current VR Reset Output Voltage IR Reset Output Leakage Current IR = 3 mA 1 < Vo < 4.70 V IR = 16 mA 1.5 < Vo < 4.75 V Over Full T (– 40 °C ≤ Tj ≤ 125 °C) Vo in Regulation VR = 5V Over Full T Range td Delay Time for Reset Output Cd = 100 nF Over Full T Range Supply Voltage Rejection Io = 350 mA Co = 100 µF e t le V4 Hysteresis Voltage o r P 60 1.6 A 0.5 0.8 V V 50 µA ms V 10 Vo – 0.15 20 V4 @ Reset out H to L Transition 3.2 VRT (off) Vo + 0.05 V – 0.04 V 3.9 V4 @ Reset out L to H Transition Over Full T Range 3.7 (s) t c u od r P e c u d ) s t( 25 V4 = 3 V Power on VoThreshold Comparator Threshold (pin 4) t e l o VH o s b O - Vo @ Reset out H to L Transition, Over Full T Range Charging Current (current generator) VRT (on) f = 120 Hz Vi = 12 V ± 5 Vpp 1.2 VRT (off) IC4 Min. 4.80 4.75 4.75 Vo @ Reset out L to H Transition , Over Full T Range 30 4.3 450 µA V V V mV (*) For a DC voltage 26 < Vi < 37 V the device is not operating. (**) Design limits are guaranteed (but not 100 % production tested) over the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. s b O 3/6 L387A Figure 1 : Dropout Voltage vs. Output Current. Figure 2 : Quiescent Current vs. Output Current. Figure 3 : Output Voltage vs. Temperature. c u d e t le ) s ( ct u d o r P e t e l o s b O 4/6 o s b O - o r P ) s t( L387A DIM. A C D D1 E E1 F F1 G G1 H2 H3 L L1 L2 L3 L4 L5 L6 L7 L9 L10 M M1 V4 V5 Dia MIN. mm TYP. 2.4 1.2 0.35 0.76 0.8 1.0 3.2 6.6 3.4 6.8 10.05 17.55 15.55 21.2 22.3 17.85 15.75 21.4 22.5 2.6 15.1 6.0 2.1 4.3 4.23 3.75 4.5 4.0 3.65 MAX. MIN. 4.8 1.37 2.8 0.094 1.35 0.047 0.55 0.014 1.19 0.030 1.05 0.031 1.4 0.039 3.6 0.126 7.0 0.260 10.4 10.4 0.396 18.15 0.691 15.95 0.612 21.6 0.831 22.7 0.878 1.29 3.0 0.102 15.8 0.594 6.6 0.236 2.7 0.008 4.8 0.17 4.75 0.167 4.25 0.148 40˚ (typ.) 90˚ (typ.) 3.85 0.144 inch TYP. 0.134 0.268 0.703 0.620 0.843 0.886 0.178 0.157 MAX. 0.189 0.054 0.110 0.053 0.022 0.047 0.041 0.055 0.142 0.276 0.409 0.409 0.715 0.628 0.850 0.894 0.051 0.118 0.622 0.260 0.106 0.189 0.187 0.167 (s) t c u d o r P e D1 L5 c u d e t le 0.152 L1 C Weight: 2.00gr o s b O - o r P E M1 M D V5 L2 H2 L3 t e l o s b O ) s t( Pentawatt V L A OUTLINE AND MECHANICAL DATA F E E1 V4 H3 G G1 Dia. F F1 L9 L4 L10 L7 L6 H2 V4 RESIN BETWEEN LEADS PENTVME 0015981 5/6 L387A c u d e t le ) s ( ct ) s t( o r P o s b O - u d o r P e t e l o s b O Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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