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| L4941 VERY LOW DROP 1A REGULATOR s LOW DROPOUT VOLTAGE (450mV Typ. at 1A) VERY LOW QUIESCENT CURRENT THERMAL SHUTDOWN SHORT CIRCUIT PROTECTION REVERSE POLARITY PROTECTION TO-220 TO-220FP s s s s DESCRIPTION The L4941 is a three terminal 5V positive regulators available in TO-220, TO-220FP and D2PAK packages, making it useful in a wide range of industrial and consumer applications. Thanks to its very low input/output voltage drop, these devices are particularly suitable for battery powered equipments, reducing consumption and prolonging battery life. It employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection. D2PAK DPAK BLOCK DIAGRAM January 2004 1/14 L4941 ABSOLUTE MAXIMUM RATINGS Symbol VI VIR IO PD Tstg Top Forward Input Voltage Reverse Input Voltage (RO=100) Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value 30 -15 Internally Limited Internally Limited -40 to +150 -40 to +150 Unit V V mA mW C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. THERMAL DATA Symbol Rthj-case Rthj-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient TO-220 3 50 TO-220FP 5 60 D2PAK 3 62.5 DPAK 8 100 Unit C/W C/W CONNECTION DIAGRAM (top view) TO-220 TO-220FP D2PAK ORDERING CODES ORDERING CODE L4941BV L4941BP L4941BD2T L4941BDT (*) (*) Available in Tape & Reel with the suffix "-TR". DPAK PACKAGE TO-220 TO-220FP D2PAK DPAK 2/14 L4941 TEST CIRCUITS Figure 1 : DC Parameter Figure 2 : Load Rejection Figure 3 : Ripple Rejection 3/14 L4941 ELECTRICAL CHARACTERISTICS (Refer to test circuit, VI=7V, CI = 0.1F, CO = 22F, TJ = 25C, unless otherwise specified.) Symbol VO VI VO VO Iq Iq Vd Parameter Output Voltage Input Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Dropout Voltage IO = 5 mA VI = 6 to 16V IO = 5mA to 1A IO = 0.5A to 1A IO = 5 mA IO = 1A IO = 5 mA IO = 1A IO = 0.5A IO = 1A VO/T Output Voltage Drift SVR Isc ZO eN Supply Voltage Rejection Short Circuit Current Output Impedance Output Noise Voltage f = 120Hz VI = 14V VI = 6V f = 1KHz IO = 0.5A B = 100Hz to 100KHz IO = 1A 58 VI = 6V VI = 6V VI = 6 to 14V VI = 6 to 14V 250 450 0.6 68 1.6 1.8 30 30 2.0 2.2 m V/VO IO = 5 mA 5 8 5 4 20 Test Conditions IO = 5mA to 1A VI = 6 to 14V Min. 4.8 Typ. 5 Max. 5.2 16 20 20 15 8 40 3 -10 450 700 Unit V V mV mV mV mA mA mA mA mV mV mv/C dB A TYPICAL CHARACTERISTICS Figure 4 : Dropout Voltage vs Output Current Figure 5 : Dropout Voltage vs Temperature 4/14 L4941 Figure 6 : Output Voltage vs Temperature Figure 9 : Quiescent Current vs Output Current Figure 7 : Quiescent Current vs Temperature Figure 10 : Short Circuit Current vs Temperature Figure 8 : Quiescent Current vs Input Voltage Figure 11 : Peak Output Current vs Input/Output Differential Voltage 5/14 L4941 Figure 12 : Low Voltage Behavior Figure 15 : Load Dump Characteristics Figure 13 : Supply Voltage Rejection vs Frequency Figure 16 : Line Transient Response Figure 14 : Supply Voltage Rejection vs Output Current Figure 17 : Total Power Dissipation 6/14 L4941 Figure 18 : Load transient Response Figure 19 : Distributed Supply with On-card L4940 and L4941 low drop regulator 7/14 L4941 Figure 20 : Distributed Supply with On-card L4940 and L4941 low drop regulator ADVANTAGES OTF THESE APPLICATION ARE: On card regulation with short-circuit and thermal protection on each output. Vary high total system efficency due to the switching preregulation and very low-drop postregulation 8/14 L4941 TO-220 MECHANICAL DATA DIM. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. MIN. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 TYP MAX. 4.60 1.32 2.72 MIN. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch TYP. MAX. 0.181 0.051 0.107 P011C 9/14 L4941 TO-220FP MECHANICAL DATA DIM. A B D E F F1 F2 G G1 H L2 L3 L4 L6 L7 DIA. 28.6 9.8 15.9 9 3 mm. MIN. 4.40 2.5 2.5 0.45 0.75 1.15 1.15 4.95 2.4 10.0 16 30.6 10.6 16.4 9.3 3.2 1.126 0.385 0.626 0.354 0.118 TYP MAX. 4.60 2.7 2.75 0.70 1 1.50 1.50 5.2 2.7 10.40 MIN. 0.173 0.098 0.098 0.017 0.030 0.045 0.045 0.194 0.094 0.393 0.630 1.204 0.417 0.645 0.366 0.126 inch TYP. MAX. 0.181 0.106 0.108 0.027 0.039 0.059 0.059 0.204 0.106 0.409 A B L3 L6 L7 F1 D F G1 E H F2 123 L2 L4 7012510/G 10/14 G L4941 D2PAK MECHANICAL DATA mm. DIM. MIN. A A1 A2 B B2 C C2 D D1 E E1 G L L2 L3 M R V2 0 4.88 15 1.27 1.4 2.4 0.4 8 0 10 8.5 5.28 15.85 1.4 1.75 3.2 0.192 0.590 0.050 0.055 0.094 0.016 8 4.4 2.49 0.03 0.7 1.14 0.45 1.23 8.95 8 10.4 0.393 0.335 0.208 0.624 0.055 0.068 0.126 TYP MAX. 4.6 2.69 0.23 0.93 1.7 0.6 1.36 9.35 MIN. 0.173 0.098 0.001 0.027 0.044 0.017 0.048 0.352 0.315 0.409 TYP. MAX. 0.181 0.106 0.009 0.036 0.067 0.023 0.053 0.368 inch P011P6G 11/14 L4941 DPAK MECHANICAL DATA mm. DIM. MIN. A A1 A2 B B2 C C2 D D1 E E1 e e1 H L (L1) L2 L4 0.6 4.4 9.35 1 2.8 0.8 1 0.023 6.4 4.7 2.28 4.6 10.1 0.173 0.368 0.039 0.110 0.031 0.039 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 5.1 6.6 0.252 0.185 0.090 0.181 0.397 TYP MAX. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 MIN. 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 0.200 0.260 TYP. MAX. 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 inch 0068772-F 12/14 L4941 Tape & Reel DPAK-PPAK MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 22.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.2.76 0.417 0.105 0.161 0.319 0.512 MIN. TYP. MAX. 12.992 0.519 inch 13/14 L4941 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. Specifications 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. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 14/14 |
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