TLE4263

5-V Low-Drop Voltage Regulator TLE 4263 Features q q q q q q q q q q Output voltage tolerance ≤ ± 2 % Low-drop voltage Very low standby current consumption Overtemperature protection Reverse polarity protection Short-circuit proof Settable reset threshold Watchdog Wide temperature range Suitable for use in automotive electronics P-DSO-20-6 Type TLE 4263 G w New type Ordering Code Package Q67006-A9095 P-DSO-20-6 (SMD) P-DSO-14-4 (SMD) P-DSO-14-4 w TLE 4263 GM Q67006-A9357 Functional Description TLE 4263 G is a 5-V low-drop voltage regulator in a P-DSO-20-6 SMD package. The maximum input voltage is 45 V. The maximum output current is more than 200 mA. The IC is short-circuit proof and incorporates temperature protection that disables the IC at overtemperature. The IC regulates an input voltage VI in the range of 6 V < VI < 45 V to VQrated = 5.0 V. A reset signal is generated for an output voltage of VQ < 4.5 V. This voltage threshold can be decreased to 3.5 V by external connection. The reset delay can be set externally by a capacitor. The integrated watchdog logic controls the connected microcontroller. The IC can be switched off via the inhibit input, which causes the current consumption to drop from 800 µA to < 50 µA. Semiconductor Group 1 1998-11-01 TLE 4263 Dimensioning Information on External Components The input capacitor CI is necessary for compensating line influences. Using a resistor of approx. 1 Ω in series with CI, the oscillating circuit consisting of input inductivity and input capacitance can be damped. The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed at values ≥ 22 µF and an ESR of ≤ 3 Ω within the operating temperature range. For small tolerances of the reset delay the spread of the capacitance of the delay capacitor and its temperature coefficient should be noted. Pin Configuration (top view) TLE 4263 G N.C. QRES GND GND GND DRES SRES TLE 4263 GM 1 2 3 4 5 6 7 14 13 12 11 10 9 8 AEP02587 INH VΙ GND GND GND VQ W Semiconductor Group 2 1998-11-01 TLE 4263 Pin Definitions and Functions Pin 1, 2, 19, 13 3 4-7, 14-17 9 10 Symbol N.C. QRES GND DRES SRES Function Not connected Reset output; open-collector output connected to the output via a resistor of 30 kΩ. Ground Reset delay; connected to ground with a capacitor. Reset threshold; for setting the switching threshold connect with a voltage divider from output to ground. If this input is connected to GND, reset is triggered at an output voltage of 4.5 V. Watchdog; positive edge triggered input for monitoring a microcontroller. 5-V output voltage; block to ground with a 22−µF capacitor. Input voltage; block to ground directly at the IC with a ceramic capacitor. Inhibit; TTL-compatible, low-active input. 11 12 18 20 W VQ VI INH Semiconductor Group 3 1998-11-01 TLE 4263 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 drives the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any over-saturation of the power element. If the externally scaled down output voltage at the reset threshold input drops below 1.35 V, the external reset delay capacitor is discharged by the reset generator. If the voltage on the capacitor reaches the lower threshold VST, a reset signal is issued on the reset output and not cancelled again until the upper threshold VdT is exceeded. If the reset threshold input is connected to GND, reset is triggered at an output voltage of 4.5 V. A connected microcontroller is controlled by the watchdog logic. If pulses are missing, the reset output is set to low. The pulse sequence time can be set within a wide range with the reset delay capacitor. The IC can be switched at the TTL-compatible, low-active inhibit input. The IC also incorporates a number of internal circuits for protection against: q q q Overload Overtemperature Reverse polarity 11 Temperature Sensor Saturation Control and Protection Circuit Watchdog Input 18 Control Amplifier Bandgap Reference 12 Output Buffer Reset Generator 9 Reset Delay 3 Reset Output 10 Reset Threshold Adjustment 20 Inhibit 4-7, 14-17 GND AEB01100 Block Diagram Semiconductor Group 4 1998-11-01 TLE 4263 Absolute Maximum Ratings Tj = – 40 to 150 °C Parameter Symbol Limit Values min. Input Input voltage Input current Reset Output Voltage Current Reset Input Reset threshold Reset Delay Voltage Current Output Voltage Current Inhibit Voltage Watchdog Voltage Ground Current max. Unit Remarks VI II – 42 – 45 – V – – internally limited VR IR – 0.3 – 42 – V – – internally limited VRE – 0.3 6 V – Vd Id – 0.3 – 42 – V – – internally limited VQ IQ – 0.3 – 7 – V – – internally limited Ve – 42 45 V – VW – 0.3 6 V – IGND – 0.5 – A – Semiconductor Group 5 1998-11-01 TLE 4263 Absolute Maximum Ratings (cont’d) Tj = – 40 to 150 °C Parameter Symbol Limit Values min. Temperature Junction temperature Storage temperature Operating Range Input voltage Junction temperature Thermal resistance junction-ambient junction-case max. Unit Remarks Tj Tstg – – 50 150 150 °C °C – – VI Tj Rth JA Rth JC – – 40 – – 45 150 70 25 V °C – – K/W soldered K/W – Semiconductor Group 6 1998-11-01 TLE 4263 Characteristics VI = 13.5 V; Tj = 25 °C; Ve > 3.5 V; (unless specified otherwise) Parameter Symbol Limit Values min. Normal Operation Output voltage typ. max. Unit Test Condition VQ 4.90 5.00 5.10 V 5 mA ≤ IQ ≤ 150 mA; 6 V ≤ VI ≤ 28 V; – 40 °C ≤ Tj ≤ 125 °C 6 V ≤ VI ≤ 32 V; IQ = 100 mA; Tj = 100 °C – Output voltage VQ 4.95 5.00 5.05 V Output current Current consumption; Iq = Ii – IQ IQ Iq Iq Iq Iq 200 – – – – – – – – 250 – 800 10 15 0.35 – 15 54 – 50 mA µA Ve = 0 IQ = 0 mA IQ = 150 mA IQ = 150 mA; Vi = 4.5 V IQ = 150 mA *) IQ = 5 mA to 150 mA VI = 6 V to 28 V; IQ = 150 mA fr = 100 Hz; Vr = 0.5 Vpp 1100 µA 15 mA 20 mA 0.6 25 25 – V mV mV dB Drop voltage Load regulation Supply-voltage regulation Ripple rejection Reset Generator Switching threshold Switching voltage Reset low voltage VDr ∆VQ ∆VQ SVR VRT VRE VR 4.2 1.28 – 4.5 1.35 0.10 4.8 1.42 0.40 V V V VRE = 0 V VQ > 3.5 V IR = 1 mA Note: The reset output is low within the range VQ = 1 V to VRT *) Drop voltage = Vi – VQ (measured when the output voltage has dropped 100 mV from the nominal value obtained at 13.5 V input) Semiconductor Group 7 1998-11-01 TLE 4263 Characteristics (cont’d) VI = 13.5 V; Tj = 25 °C; Ve > 3.5 V; (unless specified otherwise) Parameter Symbol Limit Values min. Saturation voltage Delay switching threshold Switching threshold Charge current Delay time Delay time Watchdog Discharge current Switching voltage Pulse time Inhibit Switching voltage Turn-OFF voltage Input current typ. 50 1.7 0.35 60 2.8 2 max. 100 2.1 0.55 80 – – mV V V µA ms µs Unit Test Condition VC VdT VST Id td tt – 1.5 0.2 40 – – VQ < VRT – – – Cd = 100 nF Cd = 100 nF ICd VCd TW 4.4 1.5 – 6.25 1.7 22.5 8.2 2.1 – µA V ms VC = 1.5 V – Cd = 100 nF Ve ON Ve OFF Ie 3.5 – 5 – – 10 – 0.8 15 V V µA IC turned on IC turned off Ve = 5 V Note: The reset output is low within the range VQ = 1 V to VRT Semiconductor Group 8 1998-11-01 TLE 4263 Input 6 V ... 45 V KL 15 Reset to MC 18 470 nF 20 12 22 µF Output 100 k Ω TLE 4263G 9 100 nF 10 3 4 11 Watchdog from MC 56 k Ω AES01102 Application Circuit ΙΙ 1000 µF 18 470 nF TLE 4263G Ι 12 Q 22 µF 5.6 k Ω Ι e 20 VΙ + Vr Ve VC 9 Ι 9R Ιd 4 Ι GND 11 10 VQ VR Cd 100 nF VW V RE V Dr = V Ι - V Q *) Vr SVR = 20 log ∆V Q *) Outside Control Range AES01101 Test Circuit Semiconductor Group 9 1998-11-01 TLE 4263 VΙ