Datasheet

ManualsBrandsST ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 1A TO-220

1/14January 2004

■ 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

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.

L4941

VERY LOW DROP 1A REGULATOR

BLOCK DIAGRAM

TO-220

PAK

TO-220FP

DPAK

Summary of content (14 pages)

PAGE 1
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.
PAGE 2
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.
PAGE 3
L4941 TEST CIRCUITS Figure 1 : DC Parameter Figure 2 : Load Rejection Figure 3 : Ripple Rejection 3/14
PAGE 4
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.
PAGE 5
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
PAGE 6
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
PAGE 7
L4941 Figure 18 : Load transient Response Figure 19 : Distributed Supply with On-card L4940 and L4941 low drop regulator 7/14
PAGE 8
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.
PAGE 9
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.
PAGE 10
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.
PAGE 11
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.
PAGE 12
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.
PAGE 13
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.
PAGE 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.