L1481T-5 ETC
Document overview
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Technical content
FEATURES
zLow power-loss(Dropout voltage:Max.0.5 V@ IO=1A) z Line-up for 5V and 9V output type z Compact resin package(TO-220 package) z High-precision output voltage type (Output voltage precision: ±3.0%) z Built-in ON/OFF control function z Built-in overcurrent protection, overheat protection, ASO protection circuit z Lead forming type is also available.
APPLICATIONS
z Power supplies for varies electronic equipment such as AV, OA equipment ():Typical dimensions ON/OFF control terminal(Vc) DC input(Vin) DC output(Vo) 3-(2.5) Specific IC Internal connection diagram GND 2 3 4 XXXXXXXXL1481T-X 14.1MIN. 29.1MAX. ±7.6 0.2 0.23.4NIKO 4-(0.65 4-(1.15 Epoxy resin 0.2)± 0.2)± 4-(± 0.23.6 10.05MAX. 1.2) (0.6) 4.5MAX. (1.5) 15.5 ± 0.5 ± 0.22.85 0.24.6± TYPICAL APPLICATION L1481 100uF/25V 330uF/16V Vout High or Open: Output ON Vin ON/OFF signal Low: Output OFF - Basic Adjustable Regulator Circuit -
z Input Supply Voltage, VIN (1) z On/Off Control Terminal Voltage, VCTRL (1) 2 0 V 20V z Operating Ambient Temperature Range -20 to 80 °C z Power Dissipation 1.4W(No Heat Sink) 15W(Infinite heat sink) z Storage Temperature Range -40 to 150 °C z Junction Temperature(2) 150°C z Lead Temperature (Soldering, 10 Seconds) 260 °C zOutput Current 2A (1) All are open except GND and applicable terminals (2) Overheat protection may operate at 125<=Tj<=150°C. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA = 25 °C.) Parameter Symbol Test Conditions Typical Limits Output Voltage V O (3), IOUT = 1A 5 4.90VMin 5.20VMax Dropout Voltage V D (5) 0.5V Line Regulation REG (LINE) (4), IOUT = 5mA 0.5% 2.5% Load Regulation REG (LOAD) (3), 5mA ≤ IOUT ≤ 2A 0.1% 2.0% Temperature coefficient of output voltage TCVO Tj=0 to 125°C, Io=5mA ±0.02%/°C ON-state voltage for control VC(ON) (3) 2.0V min ON-state voltage for control IC(ON) V CTRL=2.7V,(3) 20uA Max OFF-state voltage for control VC(OFF) (3) 0.8V Max OFF-state voltage for control IC(OFF) V CTRL=0.4V,(3) -0.4mA Max Quiescent Current I Q Io=0A, (3) 10mA Max Ripple Rejection Ratio RA Refer to Fig.2 Test Circuit of Ripple Rejection 55dB 45dB (Min) (3) L148T-5:Vin=7V (4) L148T-5:Vin=6~12V (5) Input voltage shall be the value when output voltage is 95% in comparison with the initial value. (6) In case of opening control terminal, output voltage turns on.
Typical Performance Characteristics RL=10 RL=5 RL= Ω Ω ΩRL=5 105 RL=10 ∞RL= Ω 0.5 1 2.51.5 2 3 250-25 4.94 4.92 4.96 5.04 4.98 5.00 5.02 5.06 50 75 100 125 100 45 6 V =7VIN
10 D15
P :No heat sink P :With infinite heat sink D2P D2 P D1 -25 02 5 10050 75 125 47uF 47uF 47uF Iq RR = 20 log [ei(RMS) / eo(RMS)] Vin V Vo Io =1A 0.33uF Fig.2 Test Circuit of Ripple Rejection L1481 eo A ei 0.33uF Vin Vc Io A ei(RMS) = 0.5V L1481 RL Io Vin = 7V ( L1481T-5) Fig.1 Test Circuit Ic RL A f = 120Hz (sine wave)
Pin # Function
1 Vin
3 GND
4 ON/OFF Control
TO-220 (4-Lead) MECHANICAL DATA mm mm A 10.5 H 3.4 3.6 3.8 C 29.1 J 2.65 2.85 3.05 D 14.1 K 15 15.5 16 E 2.5 L 4.5 F 0.63 0.65 0.67 M 1.5 G 1.13 1.15 1.17 N 0.6 D E F C B G H A N K M L J I