OPTIREG Linear TLE4262

Transcription

1 Features Output voltage tolerance ±2% 2 ma output capability Low-drop voltage ery low standby current consumption Overtemperature protection Reverse polarity protection Short-circuit proof Adjustable reset threshold Wide temperature range Suitable for use in automotive electronics Green Product (RoHS compliant) Potential applications General automotive applications. Product validation Qualified for automotive applications. Product validation according to AEC-Q1/11. Description The OPTIREG Linear TLE4262 is a in a PG-DSO-14 or PG-DSO-2 SMD package. The maximum input voltage is 45. The maximum output current is more than 2 ma. The IC is short-circuit proof and includes a temperature protection which turns off the IC at overtemperature. The IC regulates an input voltage I in the range of 6 < I < 45 to Q,nom = 5.. A reset signal is generated for an output voltage of Q,rt < 4.5. This voltage threshold can be decreased to 3.5 by external connection of a voltage divider. The reset delay can be set externally with a capacitor. The IC can be switched off via the inhibit input, which reduces the current consumption from 9 µa to typical µa. Type Package Marking TLE4262GM PG-DSO-14 TLE4262GM TLE4262G PG-DSO-2 TLE4262G Data Sheet 1 Rev. 3.

2 Table of contents Features Potential applications Product validation Description Table of contents Block diagram Pin configuration General product characteristics Absolute maximum ratings Functional range Functional description Dimensioning information on external components Electrical characteristics Typical performance characteristics Application information Reset timing Package information Revision history Data Sheet 2 Rev. 3.

3 Block diagram 1 Block diagram Temperature Sensor Saturation Control and Protection Circuit I 13 9 Q Bandgap Reference Control Amplifier Buffer Reset Generator 6 1 D RO 7 RADJ Adjustment 14 INH 3-5, 1-12 AEB181 Figure 1 Block diagram Data Sheet 3 Rev. 3.

4 Pin configuration 2 Pin configuration TLE4262G TLE4262GM INH 1 RO 2 N.C N.C. 8 D 9 RADJ Ι N.C. N.C. N.C. N.C. Q RO N.C. D RADJ AEP2588 INH Ι Q N.C. AEP183 Figure 2 Pin configuration (top view) Table 1 Pin definitions and functions Pin Pin Symbol Function PG-DSO-14 PG-DSO RO Reset output; open-collector output internally connected to the output via a resistor of 3 kω. 2, 8 3, 8, 12, 13, 18, 19 N.C. Not connected 3-5, , Ground 6 9 D Reset delay; connect capacitor to for setting delay time 7 1 RADJ Reset threshold; for setting the switching threshold connect by a voltage divider from output to ground. If this input is connected to, reset is triggered at an output voltage of Q 5 output voltage; block to ground by capacitor with C 22µF, ESR 3Ω at 1kHz I Input voltage; block to ground directly at the IC by a ceramic capacitor INH Inhibit; TTL-compatible, low-active input Data Sheet 4 Rev. 3.

5 General product characteristics 3 General product characteristics 3.1 Absolute maximum ratings Table 2 Absolute maximum ratings Parameter Symbol alues Unit Note or Test Condition Min. Typ. Max. Input I Input voltage Input current Reset output RO oltage Current Reset input RADJ I -42 I I RO I RO -.3 oltage RADJ Reset delay D oltage Current Output Q oltage Current Inhibit INH D -.3 I D Q I Q oltage INH Ground Current I -.5 A Temperature Junction temperature Storage temperature T j T stg -5 Note: The reset output is low within the range 1 Q Q,rt I C C Internally limited Internally limited Internally limited Internally limited Data Sheet 5 Rev. 3.

6 General product characteristics 3.2 Functional range Table 3 Functional range Parameter Symbol alues Unit Note or Test Condition Min. Typ. Max. Input voltage I ) Junction temperature T j C Thermal resistance junction-ambient junction-case R thj-a R thj-p 1) Corresponds with characteristics of drop voltage, output current and power description (see diagrams). 2) Package mounted on PCB mm 3 ; 35 µm Cu; 5 µm Sn; Footprint only; zero airflow. 3) Measured to pin K/W K/W 2) 3) Data Sheet 6 Rev. 3.

7 Functional description 4 Functional 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, the external reset delay capacitor is discharged by the reset generator. If the voltage on the capacitor reaches the lower threshold DRL, a reset signal is issued on the reset output and not cancelled again until the upper threshold DU is exceeded. If the reset threshold input is connected to, reset is triggered at an output voltage of 4.5. The IC can be switched at the TTL-compatible, low-active inhibit input. It also includes a number of internal circuits for protection against: Overload Overtemperature Reverse polarity 4.1 Dimensioning information on external components The input capacitor C I is necessary for compensation of line influences. Using a resistor of approx. 1 Ω in series with C I, 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. Data Sheet 7 Rev. 3.

8 Functional description 4.2 Electrical characteristics Table 4 Electrical characteristics Parameter Symbol alues Unit Note or Test Condition Min. Typ. Max. Normal operation Output voltage Q ma I Q 15 ma; 6 I 28 ; -4 C T j 125 C Output voltage Q I 32 ; I Q = 1 ma T j = 1 C Output current limiting I Q 2 25 ma Current consumption; I q = I i - I Q I q I q I q I q µa ma ma ma Drop voltage DR.35.5 I Q = 15 ma 1) INH = I Q = ma I Q = 15 ma I Q = 15 ma; i = 4.5 Load regulation Q,lo 25 m I Q = 5 ma to 15 ma Line regulation Q,li 3 25 m I = 6 to 28 ; I Q = 15 ma Power Supply Ripple Rejection Reset generator PSRR 54 db f r = 1 Hz; r =.5 pp Switching threshold Q,rt RADJ = Reset adjust threshold RADJ Q > 3.5 Saturation voltage RO.1.4 I RO = 1 ma Saturation voltage D,sat 5 1 m Q < RT Charge current I D,c µa Upper timing threshold DU Lower timing threshold DRL Reset delay time t rd 17 ms C D = 1 nf Reset reaction time t rr 1.2 µs C D = 1 nf Data Sheet 8 Rev. 3.

9 Functional description Table 4 Electrical characteristics (cont d) Parameter Symbol alues Unit Note or Test Condition Min. Typ. Max. Inhibit Switch-ON voltage INH,ON 3.6 IC turned on Switch-OFF voltage INH,OFF.8 IC turned off Input current I INH µa INH = 5 1) Drop voltage I 4.5 ; drop voltage = I - Q (below regulating range). Data Sheet 9 Rev. 3.

10 Functional description 4.3 Typical performance characteristics Charge current versus junction temperature Upper and lower timing threshold DU and DRL versus junction temperature I D, c 16 µa 14 AED I = 13.5 AED187_ I D, c 2. DU 8 I cd = 13.5 = DRL C C 16 T j T j Reset switching threshold versus junction temperature Current consumption of inhibit current versus junction temperature RADJ AED188 I INH 16 µa 14 AED INH = C 16 T j C 16 T j Data Sheet 1 Rev. 3.

11 Functional description Output voltage versus junction temperature Output current versus input voltage Q I = 13.5 AED19 Ι Q 3 ma 25 Tj = 25 C AED C 16 T j Drop voltage versus output current 1 2 Current consumption versus output current 3 4 Ι 5 DR 8 m 7 AED194 I q 32 ma 28 AED T j = 125 C 25 C I = ma 3 I Q ma 3 I Q Data Sheet 11 Rev. 3.

12 Functional description Current consumption versus input voltage Output voltage versus input voltage Ι q 3 ma 25 AED196 Q 12 1 AED197 2 R L = 25 Ω R L = 25 Ω Ι Data Sheet 12 Rev. 3.

13 Application information 5 Application information Input KL15 Reset to µc 47 nf Ι INH RO TLE 4262G Q D RADJ 1 nf 22 µf 1 k Ω Output 56 k Ω AES328 Figure 3 Application circuit I + ripple II 1 µf I INH I 47 nf INH Q 13 9 TLE 4262G RO D RADJ I Q I RO 22 µf R ext 5.6 kω Q I D RO INH D C D 1 nf I cd DR = I - Q * ) PSRR = 2 log Δ Q ripple * ) Below Regulation Range AES327_4262 Figure 4 Test circuit Data Sheet 13 Rev. 3.

14 Application information Ι Q < t rr t Q, rt D d dt = Ι D,c C D DU t t rd t rr DRL t RO Power-on-Reset Thermal oltage Dip Undervoltage Secondary Overload Shutdown at Input Spike at Output t AED31 Figure 5 Time response 5.1 Reset timing The power-on reset delay time is defined by the charging time of an external capacitor C D which can be calculated as follows: C D = ( t rd I D,c ) / Definitions: C D = delay capacitor t rd = delay time I D,c = charge current, typical 1 µa = DU, typical 1.8 DU = upper delay switching threshold at C D for reset delay time (5.1) Data Sheet 14 Rev. 3.

15 Package information 6 Package information Figure 6 PG-DSO-14 (Plastic Dual Small Outline) 1) MAX x 45 1) MAX ).2 2x ± ) Index Marking 1) 2) Does not include plastic or metal protrusion of.15 max. per side Does not include dambar protrusion of.5 max. per side Figure 7 PG-DSO-2 (Plastic Dual Small Outline) 1) 1) Dimension in mm Data Sheet 15 Rev. 3.

16 Package information Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-2). Further information on packages Data Sheet 16 Rev. 3.

17 Revision history 7 Revision history Revision Date Changes 3. Updated layout and structure Updated package drawing PG-DSO-14 Editorial changes Data Sheet 17 Rev. 3.

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