AN78Lxx/AN78LxxM Series

Transcription

1 oltage Regulators AN78Lxx/AN78LxxM Series -pin positive output voltage regulator ( type) Overview The AN78Lxx series and the AN78LxxM series are - pin fixed positive output type monolithic voltage regulator. A stabilized fixed output voltage is obtained from an unstable DC input voltage without using any external parts. types of fixed output voltage are available; 4, 5, 6, 7, 8, 9,,, 5, 8, and 4. They can be used widely as power circuits with a current capacity of up to. AN78Lxx series 5.±..6±.5 (.) (.).5±.5 5.±. 4.±. Unit: mm.±. Features No external components : 4, 5, 6, 7, 8, 9,,, 5, 8,, 4 Built-in overcurrent limit circuit Built-in thermal overload protection circuit.54 SSIP-P- AN78LxxM series 4.6 max..8 max : Input : Common : Output Unit: mm.6 max max. 4.5 max min..48 max..58 max..44 max. Block Diagram (AN78Lxx series) HSIP-P-B : Output : Common : Input Pass Tr Input () Starter oltage Reference Current Source + Error Amp. Current Limiter Thermal Protection Q R SC R Output () R Common () Note) The number in ( ) shows the pin number for the AN78LxxM series. Publication date: October SFF5BEB

2 Absolute Maximum Ratings at T a = 5 C Input voltage Power dissipation Operating ambient temperature Storage temperature Parameter Symbol Rating Unit AN78Lxx series AN78LxxM series I P D T opr T stg 5 * 4 * 65 * to to to +5 * AN78L4/M, AN78L5/M, AN78L6/M, AN78L7/M, AN78L8/M, AN78L9/M, AN78L/M, AN78L/M, AN78L5/M * AN78L8/M, AN78L/M, AN78L4/M * Follow the derating curve. When T j exceeds 5 C, the internal circuit cuts off the output. AN78LxxM series is mounted on a standard board (glass epoxy: mm mm t.7mm with Cu foil of cm or more). mw C C Electrical Characteristics at T a = 5 C AN78L4, AN78L4M (4 type) I = 6.5 to 9, I O = to I = 6.5 to 9, 5 45 I = 7 to 9, 4 95 (IN) I O = to, I O = to 4, I = 7 to 9, (L) I O = to 4,. no f = Hz to khz 4 µ I = 7 to 7, I O = 4, f = Hz DIF(min), I = 5 /T a I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 9, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L4) and T j = to C (AN78L4M) / C SFF5BEB

3 Electrical Characteristics at T a = 5 C (continued) AN78L5, AN78L5M (5 type) I = 7.5 to, I O = to I = 7.5 to, 55 5 I = 8 to, 45 (IN) I O = to, I O = to 4, I = 8 to, (L) I O = to 4,. no f = Hz to khz 4 µ I = 8 to 8, I O = 4, f = Hz DIF(min), I = 5 /T a I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I =, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L5) and T j = to C (AN78L5M) / C AN78L6, AN78L6M (6 type) I = 8.5 to, I O = to I = 8.5 to, 6 55 I = 9 to, 5 5 (IN) (L) no DIF(min) /T a I O = to, I O = to 4, I = 9 to, I O = to 4, f = Hz to khz I = 9 to 9, I O = 4, f = Hz, I = 5 I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I =, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L6) and T j = to C (AN78L6M) µ / C SFF5BEB

4 Electrical Characteristics at T a = 5 C (continued) AN78L7, AN78L7M (7 type) I = 9.5 to, I O = to I = 9.5 to, 7 65 I = to, 6 5 (IN) I O = to, I O = to 4, I = to, (L) I O = to 4,. no f = Hz to khz 5 µ I = to, I O = 4, f = Hz DIF(min), I = 5 /T a I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I =, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L7) and T j = to C (AN78L7M) / C AN78L8, AN78L8M (8 type) I =.5 to, I O = to I =.5 to, 8 75 I = to, 7 5 (IN) I O = to, I O = to 4, I = to, (L) I O = to 4,. no f = Hz to khz 6 µ I = to, I O = 4, f = Hz DIF(min), I = 5 /T a I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 4, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L8) and T j = to C (AN78L8M) / C 4 SFF5BEB

5 Electrical Characteristics at T a = 5 C (continued) AN78L9, AN78L9M (9 type) I =.5 to 4, I O = to I =.5 to 4, 9 9 I = to 4, 8 4 (IN) I O = to, I O = to 4, I = to 4, (L) I O = to 4,. no f = Hz to khz 65 µ I = to, I O = 4, f = Hz 4 5 DIF(min), I = 5 /T a I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 5, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L9) and T j = to C (AN78L9M) / C AN78L, AN78LM ( type) I =.5 to 5, I O = to I =.5 to 5, I = to 5, 9 6 (IN) (L) no DIF(min) /T a I O = to, I O = to 4, I = to 5, I O = to 4, f = Hz to khz I = to, I O = 4, f = Hz, I = 5 I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 6, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L) and T j = to C (AN78LM) µ / C SFF5BEB 5

6 Electrical Characteristics at T a = 5 C (continued) AN78L, AN78LM ( type).5.5 I = 4.5 to 7, I O = to I = 4.5 to 7, 5 I = 5 to 7, (IN) (L) no DIF(min) /T a I O = to, I O = to 4, I = 5 to 7, I O = to 4, f = Hz to khz I = 5 to 5, I O = 4, f = Hz, I = 5 I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 9, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L) and T j = to C (AN78LM) µ / C AN78L5, AN78L5M (5 type) I = 7.5 to, I O = to I = 7.5 to, I = 8 to, 5 (IN) (L) no DIF(min) /T a I O = to, I O = to 4, I = 8 to, I O = to 4, f = Hz to khz I = 8 to 8, I O = 4, f = Hz, I = 5 I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I =, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L5) and T j = to C (AN78L5M) µ / C 6 SFF5BEB

7 Electrical Characteristics at T a = 5 C (continued) AN78L8, AN78L8M (8 type) I =.5 to, I O = to I =.5 to, 45 I = to, 5 5 (IN) (L) no DIF(min) /T a I O = to, I O = to 4, I = to, I O = to 4, f = Hz to khz I = to, I O = 4, f = Hz, I = 5 I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 7, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L8) and T j = to C (AN78L8M) µ / C AN78L, AN78LM ( type) 9..8 I =.5 to 5, I O = to 7 9 I =.5 to 5, 5 I = to 5, 4 5 (IN) (L) no DIF(min) /T a I O = to, I O = to 4, I = to 5, I O = to 4, f = Hz to khz I = to, I O = 4, f = Hz, I = 5 I O = 5, T j = to 5 C Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I = 9, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L) and T j = to C (AN78LM) µ / C SFF5BEB 7

8 Electrical Characteristics at T a = 5 C (continued) AN78L4, AN78L4M (4 type) 4 5 I = 6.5 to 9, I O = to I = 6.5 to 9, T j = 5 6 I = 7 to 9, T j = (IN) (L) no DIF(min) /T a I O = to, T j = 5 I O = to 4, T j = 5 I = 7 to 9, T j = 5 I O = to 4, T j = 5 f = Hz to khz I = 7 to 7, I O = 4, f = Hz T j = 5 T j = 5, I = 5 I O = 5, T j = to 5 Note ) The specified condition means that the test should be carried out within so short a test time (within ms) that the Note ) Unless otherwise specified, I =, I O = 4, C I =.µf, C O =.µf, T j = to 5 C (AN78L4) and T j = to C (AN78L4M) µ / C 8 SFF5BEB

9 Main Characteristics Power dissipation P D (W) P D T a (AN78Lxx series) Independent IC without a heat sink Rth(j-a) = 9 C/W PD = 658mW (5 C) Ambient temperature T a ( C) Power dissipation P D (W) P D T a (AN78LxxM series) Mounted on standard board (glass epoxy: mm mm t.7mm with Cu foil of cm or more) Ambient temperature T a ( C) DIF(min) () DIF(min) T j IO = Junction temperature T j ( C) Ripple rejection () f AN78L5 I = 8 to 8 IO = 4 k k k Frequency f (Hz) fluctuation () Input transient response AN78L Time t (µs) 5 5 Input voltage I () fluctuation () Load transient response AN78L5 4 5 Time t (µs).. Output current IO (A)..5 T a AN78L5 IO = 5 IBias () IN = Ambient temperature T a ( C) SFF5BEB 9

10 Basic Regulator Circuit Input C I AN78Lxx C O Output C I is necessary when the input line is long. C O improves the transient response. Usage Notes. Cautions for a basic circuit I C I D i Figure C O C I : When a wiring from a smoothing circuit to a three-pin regulator is long, it is likely to oscillate at output. A capacitor of.µf to.47µf should be connected near an input pin. C O : When any sudden change of load current is likely to occur, connect an electrolytic capacitor of µf to µf to improve a transitional response of output voltage. D i : Normally unnecessary. But add it in the case that there is a residual voltage at the output capacitor Co even after switching off the supply power because a current is likely to flow into an output pin of the IC and damage the IC.. Other caution items ) Short-circuit between the input pin and GND pin If the input pin is short-circuitted to GND or is cut off when a large capacitance capacitor has been connected to the IC's load, a voltage of a capacitor connected to an output pin is applied between input/output of the IC and this likely results in damage of the IC. It is necessary, therefore, to connect a diode, as shown in figure, to counter the reverse bias between input/output pins. Figure ) Floating of GND pin If a GND pin is made floating in an operating mode, an unstabilized input voltage is outputted. In this case, a thermal protection circuit inside the IC does not normally operate. In this state, if the load is short-circuited or overloaded, it is likely to damage the IC. Application Circuit Examples In GND Out + C O I Q.µF Ω AN78Lxx I I O.µF AN78Lxx = ' + + O' R ' R R R Note) varies due to sample to sample variation of. Never fail to adjust individually with R. SFF5BEB

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