TLE4261G Datasheet | Siemens Semiconductor Group

TLE 4261 5-V Low-Drop Voltage Regulator TLE 4261 Bipolar IC Features q q q q q q q q q q q q q Very low-drop voltage Very low quiescent current Low starting-current consumption Proof against reverse polarity Input voltage up to 42 V Overvoltage protection up to 65 V (≤ 400 ms) Short-circuit proof External setting of reset delay Integrated watchdog circuit Wide temperature range Overtemperature protection Suitable for automotive use EMC proofed (100 V/m) P-TO220-7-1 P-TO220-7-2 Type w TLE 4261 w TLE 4261 S w TLE 4261 G Ordering Code Q67000-A9003 Q67000-A9109 Q67000-A9059 Package P-TO220-7-1 P-TO220-7-2 P-DSO-20-6 (SMD) w Please also refer to the new pin patible device TLE 4271 P-DSO-20-6 Functional Description TLE 4261 is a 5-V low-drop voltage regulator in a P-TO220-7 or in a P-DSO package. The maximum input voltage is 42 V (65 V/≤ 400 ms). The device can produce an output current of more than 500 m A. It is short-circuit proof and incorporates temperature protection that disables the circuit at impermissibly high temperatures. Semiconductor Group 1998-11-01 TLE 4261 Application Description The IC regulates an input voltage VI in the range VI = 6 V to 40 V to VQrated = 5.0 V. A reset signal is generated for a maximum output voltage of VQ less than 4.75 V. The reset delay can be set externally with a capacitor. A connected microprocessor is monitored by the integrated watchdog circuit. Connecting this input to the input voltage makes the watchdog function inactive. The presence of a voltage less than 2 V on inhibit input disables the regulator. The current consumption drops to max. 50 µA. Design Notes for External ponents The input capacitor CI causes a low-resistant powerline and limits the rise times of the input voltage. The IC is protected against rise times up to 100 V/µs. It is possible to damp the tuned circuit consisting of supply inductance and input capacitance with a resistor of approx. 1 Ω in series to CI. The output capacitor...