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Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
TO-220-5L TO-263-5L 2 (D PAK) TO-252-5L (DPAK)
Pin Definition: 1. Input 2. Reset Output 3. Ground 4. Reset Delay 5. Output
General Description
This device is a 5V low-drop fixed-voltage regulator. The maximum input voltage is 42V (65V, 400 ms). Up to an input voltage of 26V and for an output current up to 550mA it regulates the output voltage within a 2% accuracy. The short circuit protection limits the output current of more than 650mA. The device incorporates over voltage protection and temperature protection that disables the circuit at un-permissibly high temperatures.
Features
Output Voltage tolerance 2% Low-drop Voltage Integrated Over Temperature Protection Reverse Polarity Protection Input Voltage up to 42V Over Voltage Protection up to 65V (400mS) Short-Circuit Proof Suitable for use in Automotive Electronics Wide Temperature Range Adjustable Reset Time ESD Protection > 4KV
Ordering Information
Part No.
TS4270CZ550 C0 TS4270CM550 RN TS4270CP550 RO
Package
TO-220-5L TO-263-5L TO-252-5L
Packing
50pcs / Tube 800pcs / 13" Reel 2.5kpcs / 13" Reel
Absolute Maximum Rating (TJ =-40~150oC)
Parameter
Input Voltage Input Voltage (t 400mS) Operating Input Voltage Range Reset Output Voltage Reset Delay Voltage Output Voltage Ground Current Storage Temperature Range Junction Temperature Range
Symbol
VI VI VI VR VD VO IGND TST TJ
Limit
42 65 6 to 42 -0.3 to 7 -0.3 to 7 -1.0 to 16 -0.5 -50 to +150 -40 to +150
Unit
V V V V V V A
o o
C C
Thermal Information
Parameter
Thermal Resistance* (Junction to Case) Thermal Resistance* (Junction to Ambient) TO-263-5L t <1mS TO-263-5L
Symbol
RJC ZJC RJA
Maximum 3 2 65
Unit
K/W K/W
1/9
Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
Electrical Specifications (VIN=13.5V, -40oC TJ 150oC, unless otherwise noted)
Parameter
Output Voltage Output Voltage Output Current Limit Current Consumption (Iq = II - IO) Current Consumption (Iq = II - IO) Current Consumption (Iq = II - IO) Dropout Voltage (Note 1) Load Regulation Line Regulation Power Supply Ripple Rejection
Symbol
VOUT VOUT IQmax Iq Iq Iq VDR
Test Condition
5mA IQ 550mA, 6V VI 26V IQ 300mA: 26V VI 36V VO =0V IO =5mA, IO =550mA, IO =550mA, VI =5V IO =550mA
Min
4.90 4.90 650 --------
Typ
5 5 850 1 55 70 350 25 12 54
Max
5.10 5.10 -1.5 75 90 700 50 25 --
Unit
V V mA mA mA mA mV mV mV dB
REGLOAD IO = 5~550mA, VI = 6V REGLINE IO = 5mA, VI = 6~26V PSRR f=100Hz, Vr =0.5VSS
Reset Generator
Parameter
Switching Threshold Reset High Voltage Reset Low Voltage (Note 2) Reset Low Voltage Reset Pull-up Lower Reset Timing Threshold Charge Current Upper Timing Threshold Delay Time Reset Reaction Time
Symbol
VRT VROH VROL VROL R VDRL Id VDU td tRR
Test Condition
Min
4.5 4.5 - - 18 0.2 8 1.4 - -
Typ
4.65 - 60 200 30 0.45 14 1.8 13 -
Max
4.8 - - 400 46 0.8 25 2.3 - 3
Unit
V V mV mV k V uA V ms us
Rintern =30k, 1V VO 4.5V IR =3mA, VO =4.4V Internally Connected to Output VO < VRT VD =1V CD =100nF CD =100nF
Over Voltage Protection
Parameter Symbol Test Condition Min Typ Max Unit
42 44 46 V Turn-off Voltage VL, OV Note: 1. Drop voltage = VIN - VOUT (measured when the output voltage has dropped 100 mV from the nominal value obtained at 13.5 V input) 2. Reset peak is always lower than 1.0 V.
Pin Definitions and Functions Pin Symbol Function
1 2 3 4 5 Input Reset Output GND Reset Delay Output Block to ground directly on the IC with ceramic capacitor The open collector output is connected to the 5 V output via an integrated resistor of 30 kW Internally connected to heatsink Connect a capacitor to ground for delay time adjustment 5V, block to ground with 22 mF capacitor ESR, < 3W
2/9
Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
Block Diagram
Application Description
The IC regulates an input voltage in the range of 5.5V < VI <36V to VOnom = 5.0V Up to 26V it produces a regulated output current of more than 550mA. Above 26V the save-operating-area protection allows operation up to 36V with a regulated output current of more than 300mA. Over voltage protection limits operation at 42V. The over voltage protection hysteresis restores operation if the input voltage has dropped below 36V. A reset signal is generated for an output voltage of VO<4.5V. The delay for power-on reset can be set externally with a capacitor.
Design Notes for External Components
An input capacitor CI is necessary for compensation of line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx.1 Win series with CI . An output capacitor CO is necessary for the stability of the regulating circuit. Stability is guaranteed at values of CO 22uF and ESR of < 3.
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 a series 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 decreases below 4.5V, an external capacitor CD on pin 4 (Reset Delay) will be discharged by the reset generator. If the voltage on this capacitor drops below VDLR, a reset signal is generated on pin 2 (Reset Output), i.e. reset output is set low. If the output voltage rises above 4.5V, CD will be charged with constant current. After the power-on-reset time the voltage on the capacitor reaches VDU and the reset output will be set high again. The value of the power-on-reset time can be set within a wide range depending of the capacitance of CD. The IC * * * * also incorporate a number of internal circuits for protection against: Overload Over Voltage Over temperature Reverse Polarity
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Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
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 x ID,C) / V C D = Delay capacitors Definitions: t = Reset delay Time trd ID,C = Charge current, typical 14uA V = VDU, typical 1.8V VDU = Upper reset timing threshold at CD for reset delay time trd = V x CD/ID,C The reset reaction time trr is the time it takes the voltage regulator to set the reset out LOW after the output voltage has dropped below the reset threshold. It is typical 1uS for delay capacitor of 47nF. For other values for C D the reaction time can be estimated using the following equation: trr 20s/F x CD
Test Circuit
Application Circuit
4/9
Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
Reset Time Response
Electrical Characteristics Curve
FIGURE 1 - Line Regulation FIGURE 2 - Load Regulation
FIGURE 3 - Current Consumption vs. Input Voltage
FIGURE 4 - Dropout Voltage
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Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
TO-220-5L Mechanical Drawing
TO-220-5L DIMENSION DIM A B C D E F G H I J K L M N MILLIMETERS MIN 10.00 3.240 2.440 0.260 1.570 13.31 4.475 1.170 27.60 2.175 0.297 8.280 6.010 14.29 MAX 10.50 4.440 2.940 1.020 1.830 14.13 5.225 1.370 29.44 2.925 0.477 8.800 6.510 15.31 INCHES MIN 0.394 0.128 0.096 0.010 0.062 0.524 0.176 0.046 1.087 0.086 0.012 0.326 0.237 0.563 MAX 0.413 0.175 0.116 0.040 0.072 0.556 0.206 0.054 1.159 0.115 0.019 0.346 0.256 0.603
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Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
TO-263-5L Mechanical Drawing
TO-263-5L DIMENSION DIM A B C D E F G H I J MILLIMETERS MIN 10.220 14.600 0.750 1.573 4.560 1.240 2.280 0.280 8.240 1.540 MAX 10.260 15.870 0.770 1.827 4.570 1.270 2.790 0.320 8.280 1.800 INCHES MIN 0.402 0.575 0.030 0.062 0.179 0.049 0.090 0.011 0.324 0.060 MAX 0.404 0.625 0.030 0.072 0.180 0.050 0.110 0.013 0.326 0.071
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Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
TO-252-5L Mechanical Drawing
DIM A B C D E F G H I J
TO-252-5L DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 6.350 6.730 0.250 0.265 9.080 10.440 0.357 0.411 0.460 0.640 0.018 0.025 1.27BSC 0.05BSC 2.19 2.380 0.086 0.094 0.460 0.570 0.018 0.022 1.400 1.780 0.055 0.070 0.460 0.570 0.018 0.022 5.34 5.550 0.210 0.219 1.520 2.030 0.060 0.080
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Version: A07
Preliminary TS4270 5V Ultra Low Dropout Fixed Voltage Regulator
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC's terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale.
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Version: A07

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