TLE4261-2G

5-V Low-Drop Voltage Regulator TLE 4261-2 Features • • • • • • • • • • • • • • High accuracy 5 V ± 2% 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) Ordering Code Q67000-A9110 Q67000-A9140 Q67006-A9193 Package P-TO220-7-1 P-DSO-20-6 (SMD) P-TO220-7-8 (SMD) P-TO220-7-1 Type w TLE 4261-2 w TLE 4261-2 G w TLE 4261-2 GL P-DSO-20-6 w Please also refer to the new pin compatible device TLE 4271 P-TO220-7-8 Functional Description TLE 4261-2 is a high accuracy 5-V low-drop voltage regulator in a P-TO220-7 or in a PDSO package. The maximum input voltage is 42 V (65 V/≤ 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. Semiconductor Group 1 1998-11-01 TLE 4261-2 Application Description The IC regulates an input voltage VI in the range 6 V < VI < 40 V to VQrated = 5.0 V. A reset signal is generated for an output voltage VO of < 4.75 V. The reset delay can be set with an external capacitor. A connected microprocessor is monitored by the integrated watchdog circuit; if pulses are missing, the reset output is set low. The pulse repetition rate can be set within wide limits with the capacitor for reset delay. If this input is connected to a voltage of > 6 V, the watchdog function is deactivated. The device also features an inhibit input, which is activated by a voltage of > 6 V and then works on this input through internal hysteresis up to approx. 3 V. A voltage of < 2 V on the inhibit input turns off the regulator, current drain then dropping to max. 50 µA. Design Notes for External Components 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 maintains the stability of the regulating loop. Stability is guaranteed with a rating of 22 µF min. at an ESR of 3 Ω 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 µs, a reset signal is triggered on pin 3 and an external capacitor 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 µA. The IC also incorporates a number of circuits for protection against: • • • • Overload Overvoltage Overtemperature Reverse polarity Semiconductor Group 2 1998-11-01 TLE 4261-2 Pin Configuration (top view) TLE 4261-2 TLE 4261-2 GL 1 2 345 6 7 VΙ INH GND Watch QRES DRES VQ AEP00592 Pin Definitions and Functions Pin No. Symbol Function 1 VI Input voltage; block a capacitor directly to ground on the IC. The capacitor rating will depend on the vihicle electric system. Oscillation of the output voltage can be damped by a resistor of approx. 1 Ω in series with the input capacitor. Inhibit; switches off the IC when low. Reset output; open collector output controlled by the reset delay. Ground Reset delay; wired to ground using a capacitor. Watchdog; monitors the microprocessor when active. 5-V output; block to ground using a capacitor of ≥ 22-µF. ESR is ≤ 3 Ω in the operating temperature range. 2 3 4 5 6 7 INH QRES GND DRES Watch VQ Semiconductor Group 3 1998-11-01 TLE 4261-2 TLE 4261-2 G N.C. N.C. QRES GND GND GND GND N.C. DRES N.C. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 AEP01182 INH N.C. VΙ GND GND GND GND N.C. VQ Watch Pin No. Symbol Function 18 VI Input voltage; block a capacitor directly to ground on the IC. The capacitor rating will depend on the vihicle electric system. Oscillation of the output voltage can be damped by a resistor of approx. 1 Ω in series with the input capacitor. Inhibit; switches off the IC when low. Reset output; open collector output controlled by the reset delay. Ground Reset delay; wired to ground using a capacitor. Watchdog; monitors the microprocessor when active. 5-V output; block to ground using a capacitor of ≥ 22-µF. ESR is ≤ 3 Ω in the operating temperature range. Not connected 20 3 4 -7, 14 - 17 9 11 12 1, 2, 8, 10, 13, 19 INH QRES GND DRES Watch VQ N.C. Semiconductor Group 4 1998-11-01 TLE 4261-2 Overvoltage Monitoring Temperature Sensor Saturation Control and Protection Input 1 (18) BANDGAP Reference Control Amplifier Buffer + - 7 Output (12) RESET Generator 5 (9) 3 (3) RESET Delay RESET Output Adjustment Inhibit (4-7) (14-17) 4 GND Watchdog (20) 2 Inhibit (11) 6 Watchdog AEB00002 Block Diagram Semiconductor Group 5 1998-11-01 TLE 4261-2 Absolute Maximum Ratings TJ = – 40 to 150 °C Parameter Symbol Limit Values min. Input Input voltage Input current Inhibit Voltage Current Reset Output Voltage Current Ground Current Reset Delay Voltage Current Output Differential voltage Current max. Unit Remarks VI VI II – 42 – – 42 65 1.6 V V A – t ≤ 400 ms – V2 I2 – 0.3 – 42 5 V mA – – VR IR – 0.3 – 42 – V – – internally limited IGND – 0.5 A – VD ID – 0.3 – 42 – V – – internally limited VI – VQ IQ – 5.25 VI – 1.4 V A – – Semiconductor Group 6 1998-11-01 TLE 4261-2 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 System-air System-case 1) 2) Unit Remarks max. Tj Tstg – – 50 150 150 °C °C – – VI 1) Tj – – 40 32 150 V °C – – RthSA RthSC – – 65 (70)2) 3 (15)2) K/W K/W – – see diagram Figures in parenthesis refer to TLE 4261-2 G. Semiconductor Group 7 1998-11-01 TLE 4261-2 Characteristics VI = 13.5 V; Tj = 25 °C; V5 ≥ 6 V (unless otherwise specified) Parameter Symbol Limit Values min. Normal Operation Output voltage Output current Output current Current consumption Iq = II – IQ Current consumption Iq = II – IQ Current consumption Iq = II – IQ Current consumption Iq = II – IQ Drop voltage Drop voltage Load regulation Supply-voltage regulation Supply-voltage regulation Ripple rejection typ. max. Unit Test Condition VQ IQ IQ Iq Iq Iq Iq VDR VDR ∆VQ ∆VQ ∆VQ SVR 4.9 – 500 – – – – – – – – – – – 5.0 – 5.1 50 V µA mA mA mA mA mA V V mV mV mV dB 1000 – – – 5.0 40 3.5 10 65 80 IQ = 100 mA – 40 °C ≤ Tj ≤ 125 °C 0 V ≤ VI ≤ 2 V; V2 = VI; – 40 °C ≤ Tj ≤ 125 °C VI = 17 V to 28 V IQ = 0 mA, VW >6 V 6 V ≤ VI ≤ 28 V IQ = 150 mA 6 V ≤ VI ≤ 28 V IQ = 500 mA VI ≤ 6 V IQ = 500 mA VI = 4.5 V; IQ = 0.5 A VI = 4.5 V; IQ = 0.15 A 25 mA ≤ IQ ≤ 500 mA VI ≤ 6 V to 28 V; IQ = 100 mA VI ≤ 6 V to 16 V; IQ = 100 mA f = 100 Hz; Vr = 0.5 VSS 0.35 0.5 0.2 15 15 5 54 0.3 35 50 25 – Temperature drift of output αVQ voltage 2× – 10–4 1/°C – Semiconductor Group 8 1998-11-01 TLE 4261-2 Characteristics (cont’d) VI = 13.5 V; Tj = 25 °C; V5 ≥ 6 V (unless otherwise specified) Parameter Symbol Limit Values min. Inhibit Operation Current consumption Current consumption Switching threshold for inhibit Switching threshold for inhibit Reset Generator Switching threshold Saturation voltage, reset output Reverse current Charge current Switching threshold Delay switching threshold Saturation voltage, delay output Delay time Delay time typ. max. Unit Test Condition I1 I2 V2 V2 – – 5.0 2.0 – – 5.5 2.7 50 100 6.0 3.7 µA µA V V V2 = 2 V; IQ = 0 V2 = 6 V IC turned ON IC turned OFF VRT VR IR ID VST VDT VC tD tt 94 – – 0.9 2.25 – – – 95.5 97 0.25 0.40 – 1 – 10 2 1 1.1 100 – – % V µA V V mV ms µs in % of VQ; IQ > 500 mA; VI = 6 V IR = 1 mA VR = 5 V VC = 1.5 V – – 18.75 25 31.25 µA 2.50 2.75 VI = 4.5 V and Id CD = 100 nF – Semiconductor Group 9 1998-11-01 TLE 4261-2 Characteristics (cont’d) VI = 13.5 V; Tj = 25 °C; V5 ≥ 6 V (unless otherwise specified) Parameter Symbol Limit Values min. Watchdog Turn-OFF voltage Discharge current Switching voltage Pulse intervall General Data Turn-Off voltage Turn-Off hysteresis Leakage current Reverse output current typ. max. Unit Test Condition VW ICD VCD TW 5.2 5.6 2.95 – 5.6 7.5 35 6.0 9.4 – V µA V ms – VC = 1.5 V – 3.05 3.15 CD = 100 nF VIOFF ∆VI IQS IQR 41 – – – 43 6.5 – – 45 – 50 1.5 V V µA mA IQ < 1 mA – VQ = 0 V; VI = 45 V VQ = 5 V; VI and V2 open Semiconductor Group 10 1998-11-01 TLE 4261-2 Input 6 V to 40 V 1 470 nF 2 6 7 5 22 µ F 100 nF Output 100 k Ω RESET TLE 4261-2 3 From Microcontroller 4 4.7 k Ω From µC AES01455 KL15 7 V to 18 V Application Circuit ΙΙ 1000 µF 1 7 Ι Q / Ι SC 22 µF 470 nF TLE 4261-2 VΙ + VR 4.7 k Ω VQ Ι3 2 5 Ιd CD 100 nF 4 Ι GND 6 3 ΙR VR V2 VC VW VDr = VΙ -VQ AES01508 V SVR = 20 log R ∆VQ Test Circuit Semiconductor Group 11 1998-11-01 TLE 4261-2 Time Responce in Watchdog Condition V Wmin > 6 V VW V ΙOFF VΙ 3.3 V ∆V RT