Datasheet

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Type Package

TLE 4471 G Power PG-DSO-20

Triple Voltage Regulator TLE 4471

Data Sheet 1 Rev. 1.6, 2009-02-03

Features

• Triple Voltage Regulator

• Output Voltage 5 V with 450 mA Current Capability

• Two tracked Outputs for 50 mA and 100 mA

• Enable Function for main and tracked Output(s)

• Reset with adjustable Threshold

• Undervoltage- and Power On-Reset

• Watchdog

• Independent Watchdog- and Reset delay

• Wide Temperature Range

• Overtemperature Protection

• Overvoltage Protection

• Reverse Polarity Proof

• Green Product (RoHS compliant)

• AEC Qualified

Functional Description

The TLE 4471 is a monolithic integrated very low-drop triple voltage regulator. The main

output supplies loads up to 450 mA and the additional tracked outputs can provide up to

50 mA and 100 mA. In addition the device includes a watchdog for microcontroller-

supervision, an undervoltage reset, a power on reset and extended enabling features.

The watchdog and reset timing can be chosen independently of each other. The

TLE 4471 is available in a Power PG-DSO-20 package. It is designed to supply

microprocessor systems under the severe condition of automotive applications and

therefore it is equipped with additional protection against overload, short circuit and

overtemperature. Of course the TLE 4471 can be used in other applications as well.

The TLE 4471 operates in the temperature range of

= -40 to 150 °C.

Summary of content (24 pages)

PAGE 1
Triple Voltage Regulator TLE 4471 Features • • • • • • • • • • • • • • Triple Voltage Regulator Output Voltage 5 V with 450 mA Current Capability Two tracked Outputs for 50 mA and 100 mA Enable Function for main and tracked Output(s) Reset with adjustable Threshold Undervoltage- and Power On-Reset Watchdog Independent Watchdog- and Reset delay Wide Temperature Range Overtemperature Protection Overvoltage Protection Reverse Polarity Proof Green Product (RoHS compliant) AEC Qualified Functional Descriptio
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TLE 4471 Self Protection - Over Temperature - Short Circuit - Reverse Polarity Proof ESD Protection I E1 E2 E3 ≥1 Main Regulator Tracker 1 Tracker 2 EN 5 V ±2%, 450 mA Q1 100 mA, ±0.5% Tracking Q2 Reference Voltage REF2 50 mA, ±0.5% Tracking Reference Voltage Q3 REF3 Reset Generator Reset Delay DR R Reset Level Adjust RADJ W Watchdog DW TLE 4471 AES02864 Figure 1 Data Sheet Block Diagram 2 Rev. 1.
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TLE 4471 GND E1 I Q2 REF2 R DR E2 Q1 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 GND DW W Q3 E3 REF3 EN N.C. RADJ GND AEP02865 Figure 2 Pin Configuration (top view) Table 1 Pin Definitions and Functions Pin No. Symbol Function 1, 10, 11, GND 20 GROUND; all four pins connected to the heat sink 2 E1 Enable 1; Enable for Main Output Q1 and Q2; E1, E2 and E3 are ored together; connect to GND, if not needed. 3 I Input; block to ground directly at the IC for line compensation.
PAGE 4
TLE 4471 Table 1 Pin Definitions and Functions (cont’d) Pin No. Symbol Function 14 EN Enable Input; enables Q3 15 REF3 Reference Output; Reference Voltage related to Q3. 16 E3 Enable 3; Enable for Main Output Q1 and Q2; E1, E2 and E3 are ored together; connect to GND, if not needed. 17 Q3 Tracker Output Q3; block to GND with min. 10 µF with ESR < 3 Ω. 18 W Watchdog Trigger Input; positive edge triggered input for monitoring a microcontroller.
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TLE 4471 Table 2 Absolute Maximum Ratings Tj = -40 to 150 °C Parameter Symbol Limit Values Unit Notes – Min. Max. -45 – 42 60 V V t < 400 ms VQ1 IQ1 -0.3 7 V – – – mA internally limited VQ2 IQ2 -2 27 V – – – mA internally limited VQ3 IQ3 -2 27 V – -5 – mA internally limited VE1 IE1 -0.3 16 V – -20 20 mA – VE2 IE2 -0.3 6.5 V – – – mA internally limited VE3 IE3 -0.3 16 V – -20 20 mA – VEN IEN -0.
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TLE 4471 Table 2 Absolute Maximum Ratings (cont’d) Tj = -40 to 150 °C Parameter Symbol Limit Values Unit Notes Min. Max. VREF3 IREF3 -0.3 4.5 V – – – mA – VRADJ IRADJ -0.3 7 V – – – mA internally limited VDR -0.3 7 V – VR -0.3 7 V – VDW -0.3 7 V – VW IW -0.
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TLE 4471 Table 3 Operating Range Parameter Input voltage Junction temperature Shutdown voltage threshold Symbol VI Tj Vshut Limit Values Unit Notes Min. Max. 5.5 40 V – -40 150 °C – – 44 V – Note: In the operating range, the functions given in the circuit description are fulfilled. Data Sheet 7 Rev. 1.
PAGE 8
TLE 4471 Table 4 Characteristics VI = 13.5 V; Tj = -40 °C < Tj < 125 °C Parameter Symbol Limit Values Min. Typ. Max. Unit Measuring Condition Main Output Q1 Output voltage VQ1 4.9 5.0 5.1 V 10 mA < IQ1 < 450 mA; 5.5 V < VI < 19 V Output voltage VQ1 4.8 5.0 5.2 V 10 mA < IQ1 < 300 mA; 5.5 V < VI < 28 V Output voltage VQ1 4.8 5.0 5.2 V 10 mA < IQ1 < 200 mA; 5.5 V < VI < 40 V Output current limit 550 – 1500 mA – 0.25 0.
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TLE 4471 Table 4 Characteristics (cont’d) VI = 13.5 V; Tj = -40 °C < Tj < 125 °C Parameter Symbol Limit Values Unit Measuring Condition Min. Typ. Max. CQ2 ESR 10 – – µF 2) – – 3 Ω at 10 kHz2) Output voltage tracking accuracy ∆VQ3 = VQ3 - VQ1 -25 – 25 mV 5.7 V < VI < 19 V; 1 mA < IQ3 < 50 mA Output voltage tracking accuracy ∆VQ3 = VQ3 - VQ1 -25 – 25 mV 5.7 V < VI < 28 V; 1 mA < IQ3 < 40 mA Output voltage tracking accuracy ∆VQ3 = VQ3 - VQ1 -25 – 25 mV 5.
PAGE 10
TLE 4471 Table 4 Characteristics (cont’d) VI = 13.5 V; Tj = -40 °C < Tj < 125 °C Parameter Symbol Limit Values Unit Measuring Condition Min. Typ. Max. 3.5 4.1 4.5 V VQ1 > 4.8 V; VQ2 > 4.8 V 1.5 – 2.5 V – – 50 – µA -1 – 5 µA 1.3 1.7 2.0 V VE1 = 16 V VE1 = 0 V VQ1 > 4.8 V; VQ2 > 4.8 V 0.8 1.2 1.7 V – 5 15 40 kΩ – 3.5 – 4.5 V VQ1 > 4.8 V; VQ2 > 4.8 V 1.5 – 2.5 V – – 50 – µA -1 – 5 µA 1.0 1.7 2.3 V 0.8 1.2 1.7 V VE3 = 16 V VE3 = 0 V VQ3 > 4.
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TLE 4471 Table 4 Characteristics (cont’d) VI = 13.5 V; Tj = -40 °C < Tj < 125 °C Parameter Symbol Limit Values Min. Typ. Max. Unit Measuring Condition Reset delay charging current IDR, ch 2 4 6 µA VDR = 1 V Reset delay discharge current IDR, dis 60 120 160 mA VDR = 1 V Upper reset timing threshold VDR, dt 0.9 1.8 2.7 V – Lower timing threshold VDR, st 0.25 0.4 0.65 V – Reset delay time tdr trr 35 50 70 ms 0.
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TLE 4471 Table 4 Characteristics (cont’d) VI = 13.5 V; Tj = -40 °C < Tj < 125 °C Parameter Symbol Limit Values Min. Typ. Max. 49.5 50 Unit Measuring Condition Reference Output REF3 Voltage divider ratio VREF3 50.5 % of – VQ3 Output impedance RREF3 Output clamp voltage – 10 – 20 kΩ – – – 4.5 V – 1) Measured when the output voltage VQ dropped 100 mV from the nominal value. 2) Not subject to production test, specified by design.
PAGE 13
TLE 4471 II IQ1 VI I VQ1 Q1 22 µF IE1 VE1 E1 IQ2 IE2 VQ2 Q2 VE2 E2 IE3 10 µF IREF2 TLE 4471 VE3 E3 VEN VREF2 REF2 IEN EN IQ3 IDR, dis IRADJ CDR 100 nF 10 µF IDR, ch VRADJ VQ3 Q3 DR IREF3 RADJ VREF3 REF3 IW VW W IR CDW 100 nF DW IDW, ch GND R VR IGND AES02866 Figure 3 Data Sheet Measurement Circuit 13 Rev. 1.
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TLE 4471 Application Information Q2 VBAT KL. 30 I Tracking Output 2 Sensor / Peripheral REF2 optional Main Q1 RADJ DR Watchdog / Reset DW Ignition KL. 15 Enable-Signal AD E1 Enable Logic E3 R W Controller E2 EN AD REF3 Tracking Output 3 Q3 Sensor / Peripheral AES02867 Figure 4 Application Diagram Input With an input voltage between 5.5 V < VI < 40 V the regulator works in its normal operating range. If the input voltage exceeds the 40 V up to 60 V for less than 400 ms, e.g.
PAGE 15
TLE 4471 Output Voltage To obtain an output voltage of VQ1 = 5 V with an accuracy of 2% at the main output Q1 an input voltage in the range of 5.5 V < VI < 40 V is needed. The main output Q1 supplies 5 V with 450 mA current capability. For stability it requires an output capacitor of at least 22 µF and a maximum ESR of 3 Ω. The two outputs Q2 and Q3 are tracked to Q1 and can supply currents of 100 mA and 50 mA. So any undervoltage condition or shutdown of Q1 will cause the same effect to Q2 and Q3.
PAGE 16
TLE 4471 The reset delay time tdr is defined by the reset delay capacitor CDR at pin DR and can be calculated as follows: VDR ,dt t rd = C DR × -------------I DR ,ch (1) Definitions: CDR = reset delay capacitor tdr = reset delay time required by the application VDR, dt = typical 1.8 V for power up reset IDR, ch = charge current typical 4 µA For a delay capacitor CDR = 100 nF the typical power up reset delay time is 45 ms. The undervoltage reset circuitry supervises the output voltage.
PAGE 17
TLE 4471 VΙ t < t rr VQ V Q, rth t VD VDR, dt VDR, st V RO t dr t rr t t Power-on-Reset Figure 5 Thermal Shutdown Voltage Dip at Input Undervoltage Secondary Spike Overload at Output AED03045 Reset Timing The reset output is an open collector output with a pull-up-resistor of typical 4 kΩ to Q1. An external pull-up can be added with a resistor value of at least 20 kΩ. In addition the reset switching threshold can be adjusted by an external voltage divider.
PAGE 18
TLE 4471 TLE 4471 I Q Bandgap Reference RRTH1 1.36 V R Vrth,ref 1 RADJ RRTH2 AES02877 Figure 6 Adjusting the Reset Threshold For using the preadjusted reset threshold voltage of typical VQ, rth = 4.65 V, the pin RADJ has to be connected to GND. If a lower reset threshold is required by the system, a voltage divider defines the reset threshold VQ, rthext between 3.5 V and 4.65 V: RRTH1 V Q, rthext = V rth ,ref ×  1 + -------------RRTH2 (3) Vrth,ref is typical 1.35 V. Data Sheet 18 Rev.
PAGE 19
TLE 4471 Watchdog The reset and watchdog timing can be defined independently of each other by two delay capacitors CDR and CDW at pins DR and DW. The watchdog function supervises the microcontroller including time base failures. If there is no positive edge within a certain pulse repetition time twp or the trigger pulse is too short a reset is generated. Programming of the max. repetition time is done by a delay capacitor CDW at pin DW.
PAGE 20
TLE 4471 Power Supply Ripple Rejection PSRR of Main Output Q1 versus Frequency f Power Supply Ripple Rejection PSRR of Output Q2 versus Frequency f AED02995 80 dB CQ1 = 22 µF PSRR AED02996 80 dB CQ2 = 10 µF PSRR I Q1 = 10 mA 70 70 I Q1 = 450 mA IQ2 = 1 mA 60 60 50 50 IQ2 = 100 mA 40 40 30 0 10 10 1 10 2 10 3 4 10 Hz 10 f 30 0 10 5 101 102 103 Hz 105 f Power Supply Ripple Rejection PSRR of Output Q3 versus Frequency f AED02997 80 dB CQ3 = 10 µF PSRR 70 IQ3 = 1 mA 60 50 40
PAGE 21
TLE 4471 Enable Currents IE1, IE3 and Output Voltage VQ1 versus Enable Voltages VE1, VE3 IE1, IE3 AED02998 5 µA 7.5 V Enable Currents IE2, IEN and Output Voltage VQ3 versus Enable Voltages VE2, VEN AED02999 250 µA VQ1 IE2, IEN 7.5 V 4 6 200 6 3 4.5 150 4.5 2 3 100 3 1 1.5 0 0 1 2 3 4 V 0 0 VE1, VE3 Data Sheet 1.5 50 0 5 21 VQ3 0.5 1 1.5 0 2 V 2.5 VE2, VEN Rev. 1.
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TLE 4471 Package Outlines +0.07 -0.02 3.5 MAX. 6.3 0.1 5˚ ±3˚ 0.25 1.3 15.74 ±0.1 (Heatslug) B 2.8 Heatslug (Mold) 0.95 ±0.15 0.25 M A 20x 20 11 1 10 14.2 ±0.3 Bottom View 11 0.25 B 20 5.9 ±0.1 (Metal) 0.4 +0.13 3.2 ±0.1 (Metal) 1.27 3.25 ±0.1 0 +0.1 1.1 ±0.1 11 ±0.15 1) Index Marking 1 x 45˚ 15.9 ±0.15 1) (Mold) 1) 10 A 13.7 -0.2 (Metal) 1 Heatslug Does not include plastic or metal protrusion of 0.15 max.
PAGE 23
TLE 4471 Revision History Version Date Rev. 1.6 2009-02-03 Package bond wire modification according to PCN No. 2007-090. Change of package name in datasheet to “Power PG-DSO-20”. No change of package outline. Rev. 1.5 2007-03-20 Initial version of RoHS-compliant derivate of TLE 4471 Page 1: AEC certified statement added Page 1 and Page 22: RoHS compliance statement and Green product feature added Page 1 and Page 22: Package changed to RoHS compliant version Legal Disclaimer updated Rev. 1.
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Edition 2009-02-03 Published by Infineon Technologies AG 81726 Munich, Germany © 2009 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics.