TLE4261G ,5 V Low-Drop Voltage RegulatorFeatures• Very low-drop voltage• Very low quiescent current• Low starting-current consumption• Proo ..
TLE4261G . ,5 V Low-Drop Voltage RegulatorFeatures• Very low-drop voltage• Very low quiescent current• Low starting-current consumption• Proo ..
TLE4262 ,5-V Low Drop Voltage Regulator
TLE4262 ,5-V Low Drop Voltage Regulator
TLE4264-2G ,Voltage Regulatorapplications, wherever a stabilized voltage isrequired.An input voltage V in the range of 5.5 V < V ..
TLE4265 ,5 V Low-Drop Voltage RegulatorFunctional DescriptionTLE 4265 is a 5-V low-drop voltage regulator in a TO220-5 package. Maximum in ..
TMP86F409NG , Microcomputers / Microcomputer Development Systems
TMP86F808DMG , Microcomputers / Microcomputer Development Systems
TMP86F809NG , Microcomputers / Microcomputer Development Systems
TMP86FH09ANG , Microcomputers / Microcomputer Development Systems
TMP86FH09ANG , Microcomputers / Microcomputer Development Systems
TMP86FH46ANG , Microcomputers / Microcomputer Development Systems
TLE4261G-TLE4261G .
5 V Low-Drop Voltage Regulator
9'"T."
( Infineon
technologies
5-V Low-Drop Voltage Regulator TLE 4261
Bipolar IC
Features
. Very Iow-drop voltage
- Very low quiescent current Orr-iii-iii-iii"''-'-","-"-':,';
. Low starting-current consumption Cii'iiiii's"jiiii9
. Proof against reverse polarity
q Input voltage up to 42 V
. Overvoltage protection up to 65 V (s 400 ms)
. Short-circuit proof
P-DSO-20-1 /-6 /-7
q External setting of reset delay
. Integrated watchdog circuit
. Widetemperature range
. Overtemperature protection
- Suitable for automotive use
. EMC proofed (100 V/m)
Type Ordering Code Package
V TLE 4261 G Q67000-A9059 P-DSO-20-6 (SMD)
V Not recommended for new design. Please refer to the pin compatible device TLE 4271-2.
Functional Description
TLE 4261 is a 5-V Iow-drop voltage regulator in a P-DSO package. The maximum input
voltage is 42 V (65 VI: 400 ms). The device can produce an output current of more than
500 mA. It is short-circuit proof and incorporates temperature protection that disables the
circuit at impermissibly high temperatures.
Application Description
The IC regulates an input voltage V. in the range VI = 6 V to 40 V to Varated = 5.0 V. A
reset signal is generated for a maximum output voltage of k, 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 WA.
Data Sheet Rev. 2 1 2000-02-01
( Intinleon TLE 4261
tec no ogles
Design Notes for External Components
The input capacitor c; causes a Iow-resistant powerline and limits the rise times of the
input voltage. The IC is protected against rise times up to 100 Was. It is possible to damp
the tuned circuit consisting of supply inductance and input capacitance with a resistor of
approx. 1 Q in series to Cl.
The output capacitor maintains the stability of the regulating loop. Stability is guaranteed
with a rating of 22 " at an ESR of 3 9 max. in the operating temperature range.
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustment, to a voltage that is proportional to the output voltage and controls
the base of the series PNP transistor via a buffer. Saturation control as a function of the
load current prevents any over-saturation of the power element. If the output voltage
drops below 95.5 % of its typical value for more than 2 us, a reset signal is triggered on
pin 3 and an external capacitor is discharged on pin 5. The reset signal is not cancelled
until the voltage on the capacitor has exceeded the upper switching threshold VDT. A
positive-edge-triggered watchdog circuit monitors the connected microprocessor and
will likewise trigger a reset if pulses are missing. The IC can be disabled by a low level
on the inhibit input and the current consumption drops to < 50 uA.
The IC also incorporates a number of circuits for protection against:
. Overload
- Overvoltage
. Overtemperature
. Reverse polarity
Data Sheet Rev. 2 2 2000-02-01
