SIEMENS 5-VR Low-Drop Voltage Regulator Bipolar IC TLE 4261 Owner's Manual
Summary
The TLE 4261 is a robust 5-V low-drop voltage regulator designed for critical applications, including automotive use. It reliably steps down input voltages between 6 V and 40 V while providing an ultra-stable 5.0 V output up to 500 mA. Key features include integrated watchdog monitoring, short-circuit proof operation, and comprehensive protection against overvoltage, overload, and extreme temperatures. This technical manual provides detailed functional descriptions, pin configurations, stability guides, and information regarding multiple surface-mount (DSO) and TO220 packages for easy integration into your design.
Page 1 Text Content
TLE 4261
5-V Low-Drop Voltage Regulator TLE 4261
Bipolar IC
Features 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) P-TO220-7-1 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-TO220-7-2
Type Ordering Code Package TLE 4261 Q67000-A9003 P-TO220-7-1 TLE 4261 S Q67000-A9109 P-TO220-7-2 TLE 4261 G Q67000-A9059 P-DSO-20-6 (SMD)
▼Please also refer to the new pin compatible 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
Page Summary Contents For SIEMENS 5-VR Low-Drop Voltage Regulator Bipolar IC TLE 4261 Owner's Manual
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 18 |
| File Size | 131.20 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What is the maximum input voltage and output current of the TLE 4261 regulator?
The maximum input voltage is 42 V (up to 65 V for 400ms), and it can produce an output current of more than 500 mA.
How does the watchdog circuit function in the TLE 4261?
The integrated positive-edge-triggered watchdog circuit monitors a connected microprocessor and triggers a reset if pulses are missing. This function is inactive if the input is connected to the regulated voltage supply.
Can I externally set the reset delay on this IC?
Yes, the reset delay can be set externally using a capacitor connected between pins DRES (5) and GND (4).
What specific protection features does the TLE 4261 offer?
It features protections including short-circuit proof, overvoltage, overload, reverse polarity, and overtemperature protection.