L4941 VERY LOW DROP 1A REGULATOR ■ LOW DROPOUT VOLTAGE (450mV Typ. at 1A) ■ VERY LOW QUIESCENT CURRENT ■ THERMAL SHUTDOWN ■ SHORT CIRCUIT PROTECTION ■ REVERSE POLARITY PROTECTION TO-220 TO-220FP 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 Parameter Value Unit Forward Input Voltage 30 V Reverse Input Voltage (RO=100Ω) -15 V IO Output Current Internally Limited mA PD Power Dissipation Internally Limited mW Tstg Storage Temperature Range -40 to +150 °C Top Operating Junction Temperature Range -40 to +150 °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 Parameter TO-220 TO-220FP D2PAK DPAK Unit Rthj-case Thermal Resistance Junction-case 3 5 3 8 °C/W Rthj-amb Thermal Resistance Junction-ambient 50 60 62.5 100 °C/W CONNECTION DIAGRAM (top view) TO-220 D2PAK TO-220FP DPAK ORDERING CODES ORDERING CODE PACKAGE L4941BV L4941BP L4941BD2T TO-220 TO-220FP L4941BDT (*) (*) Available in Tape & Reel with the suffix "-TR". 2/14 D2PAK DPAK 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 = 0.1µF, CO = 22µF, TJ = 25°C, unless otherwise specified.) Symbol Parameter Test Conditions VO Output Voltage IO = 5mA to 1A VI Input Voltage IO = 5 mA VI = 6 to 14V Min. Typ. Max. 4.8 5 5.2 V 16 V ∆VO Line Regulation VI = 6 to 16V ∆VO Load Regulation IO = 5mA to 1A Quiescent Current IO = 5 mA VI = 6V IO = 1A VI = 6V 20 IO = 5 mA IO = 1A IO = 5 mA 5 20 mV 8 20 mV 5 15 mV 4 8 mA 40 mA VI = 6 to 14V 3 mA VI = 6 to 14V -10 mA IO = 0.5A to 1A Iq ∆Iq Vd Quiescent Current Change Dropout Voltage IO = 0.5A 250 450 mV IO = 1A 450 700 mV ∆VO/∆T Output Voltage Drift SVR Isc Supply Voltage Rejection Short Circuit Current Unit f = 120Hz IO = 1A 58 0.6 mv/°C 68 dB VI = 14V 1.6 2.0 VI = 6V 1.8 2.2 ZO Output Impedance f = 1KHz eN Output Noise Voltage B = 100Hz to 100KHz IO = 0.5A A 30 mΩ 30 µV/VO TYPICAL CHARACTERISTICS Figure 4 : Dropout Voltage vs Output Current 4/14 Figure 5 : Dropout Voltage vs Temperature 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. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 0.107 D1 1.27 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 0.409 L2 16.4 0.645 L4 13.0 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.2 6.6 0.244 0.260 L9 3.5 3.93 0.137 0.154 DIA. 3.75 3.85 0.147 0.151 P011C 9/14 L4941 TO-220FP MECHANICAL DATA mm. DIM. MIN. inch TYP MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 B 2.5 2.7 0.098 0.106 D 2.5 2.75 0.098 0.108 E 0.45 0.70 0.017 0.027 F 0.75 1 0.030 0.039 F1 1.15 1.50 0.045 0.059 F2 1.15 1.50 0.045 0.059 G 4.95 5.2 0.194 0.204 G1 2.4 2.7 0.094 0.106 H 10.0 10.40 0.393 0.409 L2 16 0.630 28.6 30.6 1.126 1.204 L4 9.8 10.6 0.385 0.417 L6 15.9 16.4 0.626 0.645 L7 9 9.3 0.354 0.366 DIA. 3 3.2 0.118 0.126 B D A E L3 L3 L6 F2 H G G1 ¯ F F1 L7 1 2 3 L2 L4 7012510/G 10/14 L4941 D2PAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 A2 0.03 0.23 0.001 0.009 B 0.7 0.93 0.027 0.036 B2 1.14 1.7 0.044 0.067 C 0.45 0.6 0.017 0.023 C2 1.23 1.36 0.048 0.053 D 8.95 9.35 0.352 0.368 10.4 0.393 D1 E 8 10 E1 0.315 8.5 0.409 0.335 G 4.88 5.28 0.192 0.208 L 15 15.85 0.590 0.624 L2 1.27 1.4 0.050 0.055 L3 1.4 1.75 0.055 0.068 M 2.4 3.2 0.094 R V2 0.4 0˚ 0.126 0.016 8˚ 0˚ 8˚ P011P6G 11/14 L4941 DPAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 A1 0.9 1.1 0.035 0.094 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 D1 E 5.1 6.4 0.244 0.200 6.6 0.252 0.260 E1 4.7 0.185 e 2.28 0.090 e1 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L (L1) L2 L4 1 0.039 2.8 0.110 0.8 0.6 0.031 1 0.023 0.039 0068772-F 12/14 L4941 Tape & Reel DPAK-PPAK MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 330 13.0 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 22.4 0.519 0.882 Ao 6.80 6.90 7.00 0.268 0.272 0.2.76 Bo 10.40 10.50 10.60 0.409 0.413 0.417 Ko 2.55 2.65 2.75 0.100 0.104 0.105 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.319 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 © 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