L4941 VERY LOW DROP 1A REGULATOR

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1 VERY LOW DROP 1A REGULATOR LOW DROPOUT VOLTAGE (450mV Typ. at 1A) VERY LOW QUIESCENT CURRENT THERMAL SHUTDOWN SHORT CIRCUIT PROTECTION REVERSE POLARITY PROTECTION DESCRIPTION The L4941 is a three terminal 5V positive regulators available in TO-220, TO-220FP and D 2 PAK 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 andsafeareaprotection. TO-220 D 2 PAK TO-220FP DPAK BLOCK DIAGRAM January /14

2 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V I Forward Input Voltage 30 V V IR Reverse Input Voltage (R O =100Ω) -15 V I O Output Current Internally Limited ma P D Power Dissipation Internally Limited mw T stg Storage Temperature Range -40 to +150 C T op 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 D 2 PAK DPAK Unit R thj-case Thermal Resistance Junction-case C/W R thj-amb Thermal Resistance Junction-ambient C/W CONNECTION DIAGRAM (top view) TO-220 TO-220FP D 2 PAK DPAK ORDERING CODES ORDERING CODE L4941BV L4941BP L4941BD2T L4941BDT (*) (*) Available in Tape & Reel with the suffix "-TR". PACKAGE TO-220 TO-220FP D 2 PAK DPAK 2/14

3 TEST CIRCUITS Figure 1 : DC Parameter Figure 2 : Load Rejection Figure 3 : Ripple Rejection 3/14

4 ELECTRICAL CHARACTERISTICS (Refer to test circuit, V I =7V, C I =0.1µF, C O =22µF, T J = 25 C, unless otherwise specified.) Symbol Parameter Test Conditions Min. Typ. Max. Unit V O Output Voltage I O =5mAto1A V I = 6 to 14V V V I Input Voltage I O =5mA 16 V V O Line Regulation V I =6to16V I O =5mA 5 20 mv V O Load Regulation I O =5mAto1A 8 20 mv I O =0.5Ato1A 5 15 mv I q Quiescent Current I O =5mA V I =6V 4 8 ma I O =1A V I =6V ma I q Quiescent Current Change I O =5mA V I =6to14V 3 ma I O =1A V I = 6 to 14V -10 ma V d Dropout Voltage I O = 0.5A mv I O = 1A mv V O / T Output Voltage Drift 0.6 mv/ C SVR Supply Voltage Rejection f = 120Hz I O =1A db I sc Short Circuit Current V I = 14V A V I =6V Z O Output Impedance f = 1KHz I O =0.5A 30 mω e N Output Noise Voltage B = 100Hz to 100KHz 30 µv/v O TYPICAL CHARACTERISTICS Figure 4 : Dropout Voltage vs Output Current Figure 5 : Dropout Voltage vs Temperature 4/14

5 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

6 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

7 Figure 18 : Load transient Response Figure 19 : Distributed Supply with On-card L4940 and L4941 low drop regulator 7/14

8 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

9 TO-220 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A C D D E F F F G G H L L L L L L DIA P011C 9/14

10 TO-220FP MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A B D E F F F G G H L L L L L DIA B D A E L6 L7 L3 F1 H G G1 F L2 F2 L /G 10/14

11 D 2 PAK MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A A A B B C C D D E E G L L L M R V P011P6G 11/14

12 DPAK MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A A A B B C C D D E E e e H L (L1) L L F 12/14

13 Tape & Reel DPAK-PPAK MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A C D N T Ao Bo Ko Po P /14

14 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. 14/14

L4940 SERIES VERY LOW DROP 1.5A REGULATORS

L4940 SERIES VERY LOW DROP 1.5A REGULATORS PRECISE 5, 8.5, 10, 12V OUTPUTS LOW DROPOUT VOLTAGE (500mV Typ. at 1.5A) VERY LOW QUIESCENT CURRENT THERMAL SHUTDOWN SHORT CIRCUIT PROTECTION REVERSE POLARITY